(SANITIZED)1. MANUAL ON PTI-4A HELIUM LEAK DETECTOR 2. DESCRIPTION OF THE LATR-2A AND LATR-9A LABORATORY AUTOTRANSFORMER (SANITIZED)

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP81-01043R003200080007-7
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 125
• Document Creation Date: December 23, 2016
• Document Release Date: April 21, 2014
• Sequence Number: 7
• Publication Date: February 24, 1959
• Content Type: REPORT

Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
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50X1 -HUM
INFORMATION-igItfORT INFORMATION REPORT
CENTRAL INTELLIGENCE AGENCY
This material contains information affecting the National Defense of the United States within the meaning of the Espionage Laws, Title
18, U.S.C. Seca. 793 and 794, the transmission or revelation of which in any manner to an unauthorized person is prohibited by law.
S-E-C-R-E-T 50X1 -HUM
NOFORN 50X1-HUM
COUNTRY
SUBJECT
USSR
1.
2.
REPORT
Leak Detector DATE DISTR.
LATR-2A and
Aut ot ran sformer NO. PAGES
Manual on PTI-4A Helium
Description of the
LATR-QA Tab or at nrv
24
February 1959
2 50X1 -HUM
DATE OF
INFO.
PLACE &
DATE ACQ.
REFERENCES
SOURCE EVALUATIONS ARE DEFINITIVE. APPRAISAL OF CONTENT IS TENTATIVE. 50X1 -HUM
a.
b.
Opisaniye laboratornykh avtotransformatorov LATR-2A i LATR-9A
scrip:tion of Laboratory Autotransformers LATR-2A and LATR-9A). This
is a one-page brochure outlining operating characteristics, technical
specifications, ar_d a circuit schematic for the above-described equipment
which appears to be manufactured at the Moscow Plant for Auditory Apparatus,
under the Chief Directorate of Prosthetics Industry, Ministry for Social
Security?RSFSR. This particular brochure appears to have accompanied a
type LATR-9A autotransformer, serial 15351, operating at 220 v. .78 amps.
Miscellaneous
50X1 -HUM
1 Certificate of Quality for universal lanD voltmeters t e BLU-2
(3) Certificate of Quality for a PTI-4A helium leak detector
(4) Service Instructions for a 100Jomi diameter, vacuum gaug=
manufactured by the Tomsk nanometer Plant
S-E-C-R-E-T
NOFORN
50X1 -HUM
STATE
ARMY
NAVY
AIR
FBI
AEC
(Note: Washington distribution indicated by "X"; Field distribution by "#".)
OST/PV
ORR/EV x
BFC
INFORMATION REPORT INFORMATION REPORT
Declassified in Part - Sanitized Copy Approved for Release 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
S-E-C-R-E-T
NOFORN
50X1-HUM
c. Geliyevyi Techeiskatel tipa PTI-4A, Vypuskno attestat, tekhnicheskoye
opisanige i instruktsiya po ekepluatatsii Type PTI-4A Helium Leak Detector,
Guarantee *gertificate, technical desription.and operating instructions). 50X1-HUM
This 47-page Russian-language manuat contains an appendix
listing component parts and circuit schematics. It is accompanied. by an
English-language tr on .a .e 59 missing). This manual accompanied
leak detector PTI-4 The detector is a special type of
mass-spectrometer for on of microscopically small leaks in
various armatures, whether of metallic or glass construction.
a
50X1-HUM
50X1-HUM
Distribution of Attachments:
ORB: Retention
OSI: Retention
NOFORN
50X1-HUM
Declassified in Part - Sanitized Copy Approved for Release 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
50X1 -HUM
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Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
50X1 -HUM
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Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
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Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
50X1 -HUM
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50-Yr 2014/04/21: CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
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npr.lassified in Part - Sanitized Copy Approved for Release
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cirep7T
50X1-HUM
7
50-Yr 2014/04/21: CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
50X1 -HUM
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=FORM
Declassified in Part - Sanitized Copy Approved for Release
9
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Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
50X1 -HUM
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11
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
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Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
SECRET uom-ERN,
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a) Catena karojfa
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50X1-HUM
nprIaccified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 CIA-RDP81-01043R003200080007-7
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npriaccifiec-1 in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
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Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
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Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
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50-Yr 2014/04/21: CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
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50-Yr 2014/04/21: CIA-RDP81-01043R003200080007-7
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Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
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Declassified in Part - Sanitized Copy Approved for Release
50-Yr 2014/04/21: CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
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Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
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Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
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Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
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Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
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Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
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Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release
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50-Yr 2014/04/21: CIA-RDP81-01043R003200080007-7
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50-Yr 2014/04/21: CIA-RDP81-01043R003200080007-7
Declassified in Part- Sanitized_Copy,Approved,for, Release @50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
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SECET
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50X1 -HUM
50X1 -HUM
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50X1 -HUM
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?
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SECRET
INICIFIORpf
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R
50X1 -HUM
Next 7 Page(s) In Document Denied
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Declassified in Part - Sanitized Copy Approved for Release
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50X1-HUM
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iretst,
,? ?
NOFORN
SECRET
INSTRUOTIM
for unpacking of the 11TH-4A instrument
1. Inspeet the peeking boxes.
Tehe the instrument eat of the ***den box.
3. Renews the soldered tape from the perimeter of
the metal eentaimes.
4. Wki out the instrument from the eontainer by means
of the elevating Ow.
9, Venom the peeking materials from the panel and
shawls of the instrument.
6..111nowe the fly lesds shorting the instruments.
Denswe wooden mousting from the memo erste*.
8, is the string fastening the ointSh..
1. Papers the foredwasuma and the diffusion maps
tea operation gamma:tag to the instrustions.
104. Seam the labrieetien brae the metal pests of
the bigamist with a elms sett rag.
-
igoVORIA
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50X1-HUM
;1
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Table or Contents
SECRET
I. TECHAICAL DFSCRIPTION
50X1-HUM
1.
Application
2.
Principle of operation
3.
technical characteristics
4.
List of components and accessories
5.
Main component parts of the instrument ?
?
?
?
6.
Construction
II. OPERATION OF ASSEMBLIES AID UNITS
A. Vacuum section
1. Pumps
2. Throttlilyg valve
3. Trap
3
3
8
10
11
14
17
17
3. Pass Spectrometer Chamber,
1. Chamber 19
2. Cathode ? 23
3. Magnetic discharge pressure gauge. 23
C. llectric section
1. Control panel T-8A
2. Cathode maission stabiliser and pressure
Slug. rectifier 32
3. Stabilised rectifiers 35
4. A.G. amplifier:
a/ First /electrometrici stage 36
bi Second and third stages 38
5. Removable output meter 40
6. Low-frequency oscillator 41
28
040e0
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41
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SECRET
NOFORM
50X1 -HUM
A.
III. OPERATING INSTRUCTIONS
Preparation
43
B.
Switching on
?
44
C.
Switching off
45
D.
Instruction for use of helium in the
leak detector
46
IV. SiRVICING AID REPAIR OF TVP1
ATK-4A LEAK DETEOTOR
1. Ealatemanoe sad servicimg 50
2. Rai* operating rules referring to the vs-
saw system of the leek detector ? ? ? ? 51
J. 1410111110
al Ciathede replaoameat 53
Ian sources cleamimg 54
ai Prosser. gauge cleaning 54
di Chamber eleamiag Si
il Instruction for dismaatling sad wash-
ing of tie 111111-4A leak deteetor vacuum
system 56
V. APPEEDIX
11 Client* diagrams of the 12111-46 lash detector
a at Circuit diagram at the 11!N-4A leak detector
Circuit diagrams of units 2=SA, 240,
1-12 sad 2-14.
? Sleek diagram of type T-18/. output meter.
Wiring diagram.
2. Schedule of components. MUT
'1140FORN
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-3
NOV)" I. TECHNICAL DESCRIPTION
1. Application
Leak detector type 11TH,441 /movable leek detectomf -
is a special version of a manes spectrometer designed for
detecting extremely small leaks in metal and glass vessels.
The leak detector makes it possible to locate the leak re-
gardless of pressure in vacuum equipment under test.
Ay means of the leak detector itis also possible to
determine the general amount of leakage in vacuum grstems
niers eutgassing from walls is thoussad times as great as
lbe leakage from the outer atmosphere.
It should be noted that the leek detector nut be very
ipretully maintained mnd cared for. Leek of attention or
lipat knowledge of the instrument may result in damaging
the instrument as a *hole orsome of its umits. Therefore
'Wig essential to make a careful study of the instalment
Ammniption and of the operating instructions prior to its
iesttimg into Derides.
2. yrinelple of Operation
4114r?. The mass spectrometer leak detector-type OTN-4A - is
?
*1igned for measUring the partial premature of helium.
!be vacuum equipment umder test is pumped out by
*leas of a special pumping device.
-t! The object under test is connected to the vacuum
Almni of the leak detector through a throttling valve, namely,
to the flange of this valve. The dimensioning of the out-
tot flenge of the throttling valve is mho= in fig. 1.
The throttling valve is designed for controlling the
i
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NOFORN
SEMI 4
quantity of gas penetrating into the mass spectrometer from
tho volume under test.
To locate leaks, the supoosed leek spots are blasted
with a fine stream of heliun from a gylinder provided with
* hose having a probe on its end. Due to its low moisture
eemtent, helipm penetrates through the leak into the volume
Under test and is partly sucked into the vacuun system oi
the sass spectrometer.
The mass spectrometer is a wlindrical chamber placed
La a magmetic field. sigh vacuum is maintained in the chasm
ber mess of a pump assembly of the leek detector.
Ihe as spectrometer is prefocused in such a way that on.
tr4
helium ions can penetrate into the ion collector placed
La the ehanber.
Xrom t
The eollector of the nese spectrometer is connected to
Amid of the first /electrometrid stage of the A.10. am-
!!!!.
Current created by helium ions passes through a resistor
the input circuit of the first stage. Voltage obtained
Mims this resistor is amplified and is applied to the out-
meter and to the audible elem./siren/.
?
the auiible alarm indicates presence of helium in the
spectrometer, and the magnitude of the pointer deflec-
tion in the output meter makes it possible to carry out a
,,.eimparative evaluation of the leak magnitude.
When helium penetrates into the mass spectroneter, the
,slarn shunt begins to lower and can completely cease upon ream
50X1-HUM
Skiing the lowest tones. The adjusted leek detector responds
Pr"?nnri?
rr:1
.fiESIZA Flit 1.
41111.7r-v v-%
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1
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ainik
SECT -
NOFOP f1/41
only to helium - the probe gas - in spite of other gases
present in the mess spectrometer and in the equipment un-
der test.
Helium has been chosen as a probe substance awing to
its properties. Low atomic weight and low discosity of he-
lls' facilitate its penetration through the leaks. Helium
is easily pumped out of the ystem without polluting it.
Menus possesses good qualities - namely, it has iner-
tial properties, it is fully safe in handling and does not
enter into amy ehemical reactions.
Isis advantages of helium' are its absence in the speo-
tram of residual gases and its low contest in atmosphere
di:200000 or 51104%/. this permits to separate the leakage
ties the eutgassing when carrying oCit air-tightness test by
of a leak detector. In referenoe to air, the lenk de-
40.11Per provides am approximately sero readies.
Helium sensitivity of the leak detector is of the order
zl&'1sn Hg per 1 division of the output meter.
this corresponds to 10 divisions of the output net?r
VIM the leek detector is adjusted for helium peak at work
-
pressure in the mass spectrometer corresponding to 20
Wisps. of the "vacuum" indicator scale.
3. teehnical Characteristics
1. technical data pertaining to fore-vacuum pump type
BH.s9s:
pumping speed - 13 1/ sin.
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Voti.
NOF'nRN
50X1-HUM
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SECRET
NOFORM
Vacuum - up to 1 x 105mm Ng,
type of oil
Type of motor - All 31/4,
power source for notor-..three-phase A.C.mains,
220y, 50 cps.,
2. Technical data pertaining to diffusion pump -
typealli-20,
pumping 'speed - 20 1/secc.,
vacuum mp to 10-6im 114.,
type of oil - BAP-4,er 811-2
heater - electric ramge 200 W, 220 v,
puap cooling - airh-000led by means of a fan.
3. Operating current of the magnetic discharge icn
gauge /on the "vacuum" indloatozioe:
fore-vacuum pressure - less than 75 division.,
operation of vacuum relq - 30 divisions * 50 to 1,1k
working pressure - 20 divisions,
"- minimum pressure /with fully closed throttling
.? valve/ - 2 to 3 divisions.
4. Operating emission current - 3 to 5 ma.
5. Accelerating voltage.
6. Melium peak.
These magnitudes are obtained when the instrument is
being adjusted and they are given in the test certificate
/Moder vacuum corresponding to 20 divisions on the "vacuum"
isdicatord
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otegyt,,
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50X1 -HUM
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
SECT
as mai 1111,1
50X1 -HUM
1. Flange of the throttling valve
2. Output meter
,A.LIDFUM1.1 at the threttlingvelve
4.1 ? ksibeASs
6. MOPONOW
/14,.. 2. lOpe MAL Leek Detester
hattaite
7. Amplifier gun 'toter - 100 scale divisisms
8. Input resistenee of the elsetremeeris stags 4.
???
1.5 1010ohms.
9. Power $ource - three - phase A.C.meins,220 V. 50 Spa
10. Power consumption : about 1000 w.
F77.1
tIOINVIO
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50X1 -HUM
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SECET
0:7R
NOFYIR"
11. Weight of instrusen
12. Overall dimensions:
a/ Main rack with frames : 570 x 600 x 1190
b/ Main rack with frames including controls and
door handles 620 x 660 1229.
4. List of Components and Accessories
N a a ?
Gisantity
Vacant unit "A" amplifier
lex for spare parts and aocesories, in-
eluding positions 3-16
Operating set of 504C ttibes
1
2
Voltage stabiliser Cr,C
2
6040
2
6060
1
0110
4
6160
1
gbyrstrom f11-0.1/0.3
1
614
1
6170
2
0490.5 - 12
1
1
605
1
6830
1
Acorn tube 6XIM
1
4. Sot of spare tubes
WIC
Voltage stabiliser MC Fri%37,71
604C
HOPOirstri
2
2
2
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50X1-HUM
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EMI
4=1,
SET
FORM
Nos
111
lane 4uantity
6, X 8
61(60
ft:matron ?II - 0.1/0.3
614
606C
6870
0.8585.5-12
auc
606
Gay;
2c, Aso= tube 6XIX
_
4
1
1
1
1
2
1
1.
1
1
1
?O. Set of spars fuses : rx-10,1-37 aa 3
22 UK-lit, 1 0 43 ma 6
241.. Set of /11,150 mit 1 43 mu 1
Sat of spare pilot lamps :
25. loon Laval - 3 4
iSlmeent lamp 11-15 6.3Y 0.28 A 1
7. Detachable output meter 1
S. Blast device with a set of missies:
Nossle dia: 0.2, 0.3, 0.4, 0.6 sin sot
Components of diffusion pump:
Ceramic parts with spiral 1
Ring 5
W. Pressure gouge 1
- 11. Cathode rt rr,:r
12. Screwdriver 1
isovov414
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SEC
Nos NOFORI4
-10-
Name
Quantity
13, Description and operation instruc-
tion to diffusion pump
14. Description and operation instruc-
tion to vacuum pump
15. Table of rubber packing rings
16. Canvas cover
17. Packing came for the instrument
18. Yastory certificate
19. Description and operating instruction
to holism leak detector type 11,11C4A
20. Strap
21. Cemplimg pin
22. Usher 8
25. Int Me
2%. Sever for trap
tr,
Spanner to diffusion pump plate
M. Casing for relwy
1
1
1
1
1
1
1
2
2
4
8
I.
1
1
5. pia Cawaolieal parts of the Instrument
Tb. instrument consiats of two main component parts:
1. Vacuum section comprising the vacuum system of itis
mass spectrometer mad the mass spestrometer
2. Metrical section comprising poser supply units
and controls of the mass spectrometer as well as
an amplifier.
The block diagram of the instrument is shovn in itig.3.
C71:7-1
0FORtil
50X1 -HUM
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talc.
grg
t4of1:4114
U4.3.
F11,1
6?
Mae instrunent is mounted on a waded steel reek.
?hero mre doors an the fvont end rear sidsm St Om
,
mi. !hese door' pimiliftts imaPeOloa limml SAW**
trAtIke, lateral and the roar doors serve also for isippevitss
Itcopolingoondttions of the leak detector in operation?
roc..At is advisable to open thee, doors when the iostrspe
, %An. Aperatica /See 7ig.4/.
411471,2o assure the possibility of moving Ike leek 60.0G10r
in operation, the instrunent is provided with !cur rolls
sad two handles.
The front panel /i.e. the control panel/ is provided
. with hinges and can be lifted to 's'!"to wiring.
tviOratit
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SMT
140FORN
I - 12-
50X1 -HUM
1. Control panel T-8
2. Amplifier, sidible alarm
3. Oscillator 2-12
4. Cathode adagio& stabiliser and
pressure gouge 2-14 rectifier
Nig. 4. pros* Tlrs, Fent door removed.
The main assemblios. ths electric-radio section of the
instrument, namely, the A.S. amplifier with the audible alarm
and the rectifier, 40 low-frequsacy oscillator with the
rectifier and the discharge pressure gauge rectifier with the
emission current stabiliser - all these elements are de-
signed as three separate units extrectible from the units
body.
These units are electrically connected with the whole
circuit by means of separate contact blocks.
The mass spectrometer chmnber is also a separate unit.
The vacuum connection of the chamber with the whole leak
NOFORN 5nrforts
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tioc6c?4 sEcr
50X1 -HUM
13
detector is carried out by means of flanges, Ind the elec-
tric connect Lon - by menns of two plugs.
The diffusion pump with the fan blower as well as the
magnet and the throttling valve are mounted on the rear
side of the leak detector. /See Fig.5 rear view of the
leek detector /.
The output meter is conf.ected with the leek detector
by means of a cable tith a plug.
Pig. 5. Leak detector lzrpe ITTP-A
Rear view. Sheathing removed.
'01 11:1-
ticcomoVA, Vs1
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SECRET NOFORNI
1. Throttling valve
2. Trap / r t .
3. Diffusion pump
4. Plug for connecting the output meter
5. Mass spectrometer chamber T-16
6. Fore-vacuum pump motor
7. Fore-vacuum pump
8. Connecting hose between the diffusion pump,
and the fore-vacuum pump
9. Yan flower
10. Magnetic system.
II. OPERATION OF ASSEMBLIES AND UNITS
A. Vacuum Section
The vacuum section of the instrument comprises pumps,
mass spectrometer chamber, throttling valve and pipelines.
1. Pumps
Two vacuum pumps are used in the leak detector - the
or-vacuum /mechanical / pump and the diffusion /steam jet/
pulp.
The fore-vacuum pump - type BE-494 -is designed for
obtaining initial i.e. low vacuum.
The Initial pressure, i.e. the pressure in the //stem,
iiihra the mechanical pump can be put into operation for eva-
cuation, is equal to atmospheric pressure. The pump (moue
ates the system in the range from atmospheric pressure to
10 mmHg.
The principle of operation of the fore-vacuum pump can
be clearly seen from Fig.6. /the cut is perpendicular to
the piston skis/.
SECRF.T
NOFORN
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-15
SECE,FOR
FK 6
1ig.6. Pore-vacuum /mechanical/ pump
1. Evacuation space
2. Piston drum
3. Pump &ember
4. Plates
5. Valve
6. Pump body
7. gjection piece
8. Suction piece
Pump chamber 3 is immersed in a rectangular iron body
6, filled with oil. The suction piece passes through the
pump cover into the chamber the so-called evacuation spade
1 Where the piston rotates /as shovel by the arrow/.
The rotating piston comprises drum 2 and two plates 4,
the latter being placed in the slits of the drum. Stoll
rt
springs aro placed between the plates and these springs con-
Siantky press the plates on to the wlindrical wall of the
pump ihaaber limiting the evacuation space.
The axis of piston rotation coincides with its gamet-
e/cal axis but is shifted upwards with regard to the chmsiber
axis. Thus a constant contact between the rotating drum and
the chamber wall is obtained, and when the pump operates,
the plates allows elide along the elitist times approadhing
to one another or withdrawing from one anopiTricp-
NOF.0 R N
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EMT
50X1 -HUM
- 16
t4OVORINI
There are two holes on the latevill sides of the body
- a hole for setting the oil level in the tank /upner hole
with an observation port / and another one for discharging
the oil /lower holeA
When the pump is in operation, oil ihould be at a cer-
tain level above valve 5 and for this reason the oil level
required for normal work is marked on the observation port.
The valve is designed for passing the gss ejected from
the pus* and to prevent it from penetrating back into the
pump. Oil above the valve prevents the latter from being
in direct contact with atmonheric air.
The diffusion /oil vapour/ pump - type Alet-20 - is
designed for obtaining high vacuum- The pump provides
for azi vacuum /with freezing out of steam/ up
.6
to 10 ma lig.
The operation scheme of this pump is seen from fig.?.
The/MIK - 20 pump body is air-cooled.
Oil is warmed up by means of an electric heater / a
range/ and evaporates. The vapour passes into the nossle
sad is ejected from the nozzles downwards with great speed,
and then enters the cooler where condensation takes place.
Gas molecules approaching from region A, are entrained by
a stun jet and transferred to the lower part of the
pump where from they are removed by means of a mew
chanical pump.
F:Tr:"T
NOFORN
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50X1-HUM
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SECRET
NOFORN
7. Diffusion /steam-jet/ pump
a/ 1. Oil rejectors
2. Pump body
3. Nossle
4. Oil vapour Sot
5. Steen supply line
h/. Sossle operation schwas
6. Steen
7. Bvaporator
8. Oil
9. Heater
10. Outlet piece
11. Tater cooling
2. Throttling Valve
The valve is an inportant metallic component of the
leak detector conduit. The valve construction is &own
Lang. 8.
The aylphon is a corrugated metallic tube which, due
to its corrugation, is easily bent and extended being vary
convenient for ensuring the valve notion inside the va-
cuum system. Sylphons are used as special packing when
r Va
T
NOFORNI
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SECRET
NOFORN
-18-
transferring the motion through the vacuum chamber walls.
50X1-HUM
PHAVoital
F158
WINN
Fig. 8. Throttling valve
3- n12
IL trap is placed on the evacuation path, bet:wipes the
diffusion pump and the as spectrometer chestier. The Ws.
Is cooled with liquid nitrogen which is poured into the
trap flask. The trap is a special Dewar vessel and pro-
vests the oil vapour from penetrating into the system from
the diffusion pump. Then passing by the cooled walls of
the flask, the oil vapour condenses. In general, if tkere
is a cooled surface in the installation, this surface acts
as a tmap for all vapour whose pressure corresponds to the
pressure of the saturated vapour at temperature exceeding
that of the cooled surface. Therafole, When initial rare-
faction takes place, and considerable portion of gas removed
from the volume isiossentially water vapour the presence
of the trap apprecially accelerates the initial rare-
faction.
ElriN0FoR
No liquid nitrogen should be poured into the trap
St the beginning of the evacuation process. If the trap
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SECM
t4OFORO
is cooled at the very beginning of the evacuation operation,
not only watt)." vapour will condense on the trap surface,
but so will the gases which fora part of the air. Owing
to this fact, when the gas pressure in the vacuum system
is produced as a result of evacuation, and becomes lower
than the saturation pressure for condensed gases /which cor-
responds to the trap temperature /, then out gassing
wilt begin from the trap walls and this will delay the
pumping.
The trap boly is directly connected with evacuation
loran& pipe of the mass spectrometer chamber.
Vacuum system lines are thoroughly soldered in joints.
Vacuum tightness of joints between different components
t??.. -
the trap, the diffusion pump, the valise - is ensured
by MAORIS of groove flanges, the rubber pecking rings bang
in al
placed in the grooves. Flanges are tightened with bolts.
tic .
Men the throttling valve is closed and the trapis
6
soiled, vacuum up to 5 x 102- am lig is obtained in the va-
oumm grates of the mass spectrometer.
the
Working pressure in the mass spectrometer chamber is
wit. .a
of the order of 2.5 - 10 am Ng and is maintiimed at this
level owing to control or gas leakage from the object me-
test. The control is perforaed by means of a tbrottl-
tbe
ins valve.
3
B. Mass Spectrometer Chamber
1. Cha*er
The outer view and the inner construction of the mass
spectrometer chamber are Shown in Fig.9.
NOFORV
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IMP
20
SEMICIOFORN
The disposition of the chamber in the leak detector
is shown in Fig..
The mass spectrometer chamber /unit T-16/ consists
of a brass body, inside which the following components are
placed: a cathode, an ion source, a diaphragm and a high -
resistance tea/AP.
The chamber is placed in the gap between the poles of
the magnetic circuit which produces magnetic field intensi-
ty of 1300-1400 oersteds.
The magnetic circuit comprises two magnetics cast from
"Magnico-627" alloy and fittings made of "ARMCO" iron.
An A.C. heated eathode which snits electron beau is
msumted in the chamber, Shove the ism source box. To di-
rect the electron been tessels the Lam source-box, +200 v
Sr. applied to the ion owes relative to the cathode, and,
in addition, the electron Num is asselerated by the maiss.
tic field.
The ion source box has two rectangular holes.
Zlectrons emitted by the cathode enter the box through
141 upper hole, and ions forsed upon collision of electrons
with gas soleoules pass through the lateral hole.
Ions flow out of the ion source box and are accelerated
by the electric field applied between the ion source and
the input diaphragm. The magnitude of the accelerating
voltage is of the order of 300-400 v.
The diaphragm is welded on to the chamber boi, and
accelerating voltage is applied so that negative paten-
the
tial is applied to the chanber body, and positive vol g.-
to the ion source box.
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Str7
- 21
AsafAVed ions penetrating into the chamber through
the slit of the input diaphragm, are deflected by the mag-
netic field and move in circular paths. If the electric
end the magnetic fields are constant, ions of different
masses acme in paths with different radii.
1ig.9. Mass Spectrometer T-16 ChaSber
/dismantled/
1. ftscuation branch pipe
2. Chamber supply inlet
3. Supply inlet of the electrosetric tUbs
4. Diaphragm
5. Pressure gauss
6. Helium ion collector
7. Cathode and ion source r.1171.
8. High-resistance resistor
WoACI
9. ()Au. tube
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SICEI
-22-
NOFORN
In this mass spectrometer constant magnetic field and
accelerating electric field are chosen no that from all
forsed ions only those of the helium can pass through the
slits of a number of diaphragm on to the ion collector.
The path radius for helium ion in this mass spectro-
'
meter is equal to 4 cm.
Three grids are placed in front of the ion collector,
and these grids serve for suppressing the noise from fo-
reign ions whieh can reach the ion collector.
Constant voltage /300-400 v/ is applied to the center
reit /so called suppressor grid/, two other grids being
esamested.with the chamber bo'ly. Ion current from the
selleeter is mapplied to the input of the A.C. simplifier
first stage.
TO ensure the neoessary air-iightness, all mechasis
seenections of the vacuum grates are thoroughly soldered.
Wets are inserted with rubber spasms and are tight-
ened with nuts, The,larios lietwesm06U'ehember cover
end the be. lease sealed', with a"ribher-rihg inserted into
,L
the grows:
The islets to the haWber are insulated from one smo-
ther mad from the ?bather body by means at rubber bushings.
Th. collector /together with the Wei-resistance resistor
am,the grid of the electrometric tube / is insulated from
the chamber body by means of a type "PCI-i, 4-600" insulator.
The collector* the pressure gauge, the electrometric
Ube, the high-resistance resistor and the6athode are placed
is the chamber and all these components are detachable.
NOFORN S,751,1
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- 23 -
SEres,g2150T1
CAUTION:
Men chamber compononts are installed or removed, the
two plugs pertaining to the chamber supply should be discon-
nected, because even if the instrument is switched off, there
may be a potential of about 1500 r on the pressure gouge
electrode.
ileotrodes and wire connections of the chamber are se-
cured by means of welding and soldering.
The 61111( tube and the high-resistance resistor are
fastened by means of jeottootaots.
The ion source box is made of Mosel metal.
The cathode /lig.10/ is inserted into the spring ter-
misalstastened along the sides of the box. rilasent volt-
s". is eupplied to the as teruinals.
Zi A
v?
Pig.10. Components of
1. Pressure gauge body
2. Pressure gauge lid
3. Pressure gauge inlet
4. Pressure gauge ring
5. Cathode
nage
spectrometer T.16
Closter.
NoV'OPM
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SECRET
=, 2
MID
b:F711
:
? HR: ince redistor
7. 6;tt1;,% tube
2. Cathode
The cathode is a 20 mm long tungsten filament welded
on to two angles inserted into the ion source terminals.
Filament current is about 4A, filament voltage is 1.5 v.
Operating emission current at full sensitivity is 5 wk.
Cathode life expectancy at 5 mit emission current is
about luO hours. The burned-out cathode is easily replaced.
3. Magnetic discharge pressure gauge.
A magnetic discharge pressure gouge /ion gauge / is
designed for measuring pressure in the Chamber. The gauge
is placed inside the *batboy end it serves simultaneously
ace transducer for the control circuit which matcmatioally
switches off the use spectrometer cathode supply when the
pressure in the Chamber exceeds the admissible limit.
The gauge consists of a boll, /aluminium casing/ co-
vered with a lid, and a ring fastened on the insulator in-
pito the boly. To this ring 41200 v are supplied relative
to the chamber body Afig.10/.
The pressure gauge inside the chamber is placed in
At magnetic field. The gauge current obtained as a re-
sult Wpm molecules ionisation depends upon the pressure
ii the chamber. The geometrical dimensions of the pressure
gouge and the voltage supplied to the gauge are chosen so
that the discharging current of the gouge depends directly
upon the pressure.
VI:Prrni
The mass spectrometer chamber with all supplying wires
NOFORN
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- 25 -
SE1
is shown in the black dtaigsam
NKYFURti
50X1-HUM
OMLIELEZMiasu'agsaima.
fie ft
Fig.11. Block Diagraa.
We following voltage should be applied to the chamber:
Filament voltage - electronically stabilised A.C.
voltage, 1.5 /4A/.
2/. Voltage between the cathode and the ion source -
electronically stabilised d.c. voltage, 200 v.
3/. Modulated accelerating voltage applied between
the chamber body and the ion source - electronically sta-
bilised d.c. voltage, about 300 - 400 v.
4/. Pressure gauge supply d.c. voltage applied between
NOIFO-
the chamber body and tne pressure gauge ring, regulated
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ECT
MOFOR
against mains voltage variations by means of a fwPv'n-vmb
nominee transformer 1200 V. 50X1-HUM
The above mentioned voltages are obtained from power
units which also perform measuring and monitoring functions.
Voltages are supplied through the control panel to the Cham-
ber by means of a cable.
The supply inlet to the chamber is terminated with a
5-pin block.
The base diagram of the 5-pin inlet in the chamber is
shown in Fig.12.
In addition to the 5-pin inlet, there is also a 6-pin
inlet in the chamber for supplying the 61IIIK tube of the
electrometric stage, the tube being placed inside the cham-
ber body.
5/. The 6I1X plate supply - electronically stabilised
d.c. voltage, + 5 to 8 v.
6/. Screen grid supply - electronically stabilised
d.c. voltage, + 25 v.
7( Filament supply - unstibilised d.c. voltage, 3.5 v.
8. Suppressor grid supply - electronically stabilised
d.c. voltage, + 300 to 400 v.
The above mentioned voltages are obtained from unit
"amplifier", audible alarm" and are supplied to the dhasiber
by moans of a cable terminating with a block having six fe-
male contacts.
Base diagram of the 5-pin inlet to the chamber is
shown in Fig.12. SFPET
NoFoRt4
The mass spectrometer is provided with controls and
- 2 -
1
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v
Qrr"r"
-27-
monMgpwielements, namely, accelerating voltage cont-
rol, stepped sensitivity control, audible alarm volume cont-
rol, relay for automatic switching off the cathode under
poor vacuum conditions and toggle switches for switching
the seine.
Control and monitoring elements are located on the
control panel.
Ps..
4441.y Ut. IOWA WWWICigaiet, inlets
to the mass spectrometer chamber
NOFORM
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SECT - 23 -
NOF?114 B. Llectric Section
1. The ?-8A /Fig.13/ Control Panel.
The following meters are placed& the control panel:
1. "Emission" indicator - milliammeter for 10 ma, con-
nected into emission current circuit.
2. "Vacuum" indicator - milliammeter for I ma, con-
nected into pressure gauge circuit.
Readings of the order of 70 divisions correspond4o
the fore-vacuum pressure, and the diffusion pump can be
switched on at such pressure.
Readings of the order of 20 divisions correspond to
the working pressure in the chamber. Under good vacuum/
conditions and with closed throttling valve, the Nvacuumr
indicator should read 2 divisions.
3. "Accelerating voltage" indicator - a voltmeter
for 500 v.
To ensure indications of the meter, it is necessary
to press on the push-button bearing inscription "starting
pm-button" after having switched on the leak detector and
having obtained pressure below 30 divisions.
Upon automatic switching off the cathode, the aster
'eases to indicate the accelerating voltage.
4. "Sensitivity" knob which permits to carry out
stepped variittion of the leak detector sensitivity by chant-
ing the emission current of the cathode.
The sensitivity switch is connected in to the input
circuit of the emission stabilizer. SE77.1
In position "1", helium sensitivity of the lealkottenkti.
or is maximum and the emission current should be 3-5 ma.
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c-
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NOFORN
- 29 -
In positions "10" and "100" the sensitivity decrease*
approximately ten and hundred times.
In "Off" position the cathode filament is fully switched
off.
5. "Accelerating voltage" control sakes it possible
to vary this voltage from 300 to 400 v, i.e. by 100 v.
This is essential for accurate adjustment of the leak
detector for helium peak. This adjustment may slightly vary
when replacing the chamber as a result of magnet ageing and
some other causes.
The required accelerating voltage of about 300-400 v
is supplied from two electronically regulated power supplies
which are mounted on units "amplifier, audible alarm" and
weseillatorw.
The supplies are connected in series.
The magnitude of the accelerating voltage obtained
tmrimg factorvadjustment of the leak detector is shown in
the tesikertificate of the instrument.
6. Relay push-button *Starting push-button".
Upon obtaining vacuum corresponding to 30 sr less di-
visions on the "vacuum indioator", the accelerating voltage
and the cathode supply are fed into the mass spectrometer
ehaviber by pressing on the push-button.
Simultaneously heavy current passes through the relay
winding, the relay armature is attracted and the relay con-
tacts close the accelermting voltage circuit as well as the
winding circuit of the relay itself.
'Upon deterioration of vacuum /over 30 diviWifte-bh the
IFICrtifttki
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Mr: woofz"
"vacuum" Indicator scale/ the rela armature automatically
released and then the circuits which were closed by the re-
lay contacts break and the chamber cathode filament voltage
sharply drops.
Winding circuit of the relay is interrupted by con-
tacts as a result of relay operation, and therefore the re-
lay cannot be switched on by itself.
Twitch on the relay again when vacuum becomes suf-
ficieetly good, it is necessary to press upon the "starting
push-butt on" .
The above described circuit automatically and reliably
prevents the cathode from burning out in case of a sudden
deterioration of vacuum /for example, when a suidea turning
of the throttling valve occurs/.
After this it suffices to close the valve and to press
on the starting pushr4utton after 1-2 mils*s interwe1..2han
the operation may oontinued.
7. *Volume control*.
Volume is controlled by means of a 470 kilo-ehm poten,
tioneter connected into the fins' stage grid eircuit of the
audible alarm relaxation oscillator.
The relaxation oscillator is mounted in the *amplifier%
audible alarm" unit, and the potentiometer is placed an the
Control panel.
8. In addition to the above mentioned controls, there
are four switches on the panel.
The extreme right-hand switdb serves for switching on
tho fore-vacuum pump motor. qttnreax
50X1-HUM
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NoroRM
-32-
E. Starting push-button
7. Sensitivity switch
2. Cathode emission stabilizer and pressure gauge
Dower suroply unit T-14 /1ie.14/.
At pressure 10-4 - 2.5 x 10-4 mm Hg the operation of
the tungsten cathode is very unstable.
Without any visible causes, the emission of such a
cathode can vary by several times. In addition, the emission
varies depending upon variation vacuum. The supply of ca-
thode f*.om the ferro -resonance stabilizer or even from the
storage battery does not eliminate this instability result-
ing from phenomena taking place on the cathode surface.
To eliminate instability of cathode emission, a spe-
cial emission stabilizer is6sed. This stabilizer is a fi-
lament regulator controlled by emission current. The lat-
ter passes through resistors connected to the input of the
emission stabilizer amplifier /tube 610/. Amplified oscil-
lations of the emission current are supplied to the grid of
the 6113C tube.
The 6n3c tube is connected in parallel with the pri-
mary of the controlling transformer TB-23 whose secondary
is connected in series with the chamber cathode. Resist-
ance variation of the primary circuit of the controlling
transformier changes the resiatance introduced into the
secondary and varies the filament current so that the
emission current should remain constant.
The emission stability is maintained within 44. AlOPORW
In addition, there is a variable resistor in the stm-
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NOVORN
The next switch is designed or switching on the
preheating of the diffusion pump.
The third switch serves for switching on the radio
units whereas the extreme left-hand switch is designed for
switching on the cathode supply transformer.
The extreme right-hand switch is the common switch of
the supply mains.
Signal lamps placed above the common switch indicate
the mains voltage supply.
The fifth lamp - the extreme left-hand one-illuminated
in red, lights when the cathode has burned out or whet there
is a break in the cathode circuit.
50X1 -HUM
Pig.13. Coatrol Panel
1. "Baission" indicator
2. 'Vacuum" indicator
3. "Accelerating voltage indicator
4. Volume control
5. "Accelerating voltage" control
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SEMI
woottim
- 32 -
. Starting push-button
7. Sensitivity switch
2. Cathode emission stabilizer and pressure gauge
ower su 2.14 /F151.1.i4/.
At pressure 10-4 - 2.5 x 10-4 an Kg the operation of
the tungsten cathode is very unstable.
without any visible causes, the mission of such a
cathode can vary by several times. In additio4, the emission
varies depending upon variation vacuum. The supply of aa-
thode from the ferro-resonance stabiliser or even from the
storage battery does not eliminate this instability result-
ing from phenomena taking place on the cathode susfase.
To eliminate instability of cathode emission, a spe-
cial emission stabiliser isfised. This stabiliser .is a fi-
lament regulator controlled by emission current. The lat-
ter passes through resistors connected to the input of the
eaission stabilizer amplifier /tube cas/. Amplified email-
lations of the emission current are supplied to the grid of
the 6113C tube.
The 6n3c tube is connected in parallel with the pri-
mary of the controlling trautsfonaer r1-23 shoos secondary
is connected in series with the chamber cathode. Restat-
e:ice variation of the primary circuit of the controlling
transfomer changes the resistance introduced into the
secondary and varies the filament current so that the
emission current should remain constant.
The emission stability is uaintained within 4N0FoRN
In addition, there is a variable resistor in the step-
50X1-HUM
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Steltr-iNOFOR74. "
biliser unit var3se slotted axle is brought out to the
front wall of the chassis /with inscription "emission
setting"/.
The resistor can be used for setting the emission cur-
rent to3 ?5 ma, this being essential when replacing the
cathode.
In addition to the emission stabilizer, the T-14 unit
comprises a pressure gauge power supply.
The voltage for supplying the pressure gauge /1200 v/
is obtained from the high-voltagefectifier employing the
2U2C tube.
The following elements are connected into the d.c.cir-
suit of the pressure gauge: a ballast resistor of about 800
kilo-ohms, a "vacuum" indicator /milliammeter for 1 ms/ lo-
cated on the control panel, and two rasistors - fixed and
variable, 15 kilo-ohms each.
Voltage supplied to the E,C5 grid is taken from these
latter resistors and it serves for automatic switching off
the cathode when vacuum' becomes poor.
The automation circuit emprises a 605 Ube and an
electromagnetic relic/ eonnected into the plate circuit of
the tube.
The relay is placed on the control panel.
Limits of relay operation can be adjusted by means of
a variable resistor in the 6C5 grid circuit.
This slotted resistor is brought out to the chassis
of the pressure gauge power supply. While factory adjust-
ment the relay is adjusted for operfttion at vacuum equal
NOFIORNI
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gePiEl
- 34
NOFORM
to 26-32 divIsioal .)f the "vacuum" i,idicator scale.
Re4.ulatiol of relay operation currelt is necessary
when the bC5 tube is replaced.
The T-14 unit has also a blocking push-button and a
push-buttoa for discharging the capacitor connected into
the circuit of the pressure gauge power supply.
The blocking push-button automatically switches off
the mains wire which supplies the power transformer of
the pressure gauge when opening the front door of the in-
strument.
CAUTION:
Before removing the S-14 unit from the frame of the
leak detector for inspection or repair, it is necessary to
discharge the high-voltage capacitor of the pressure gauge
power supply by pressing the push-button placed on the
left-hand side of the chassis.
Fig. 14. Block T-14. Cathode emission sits-
biliser and pressure gauge poser
supply. General view.
NOFORN
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SEGE";
NOFORM
-35-
50X1-HUM
1. 2U2C/879 tube
2. 605 tube
3. 6A8 tube
4. 6113C tube
5. Fuses
6. "Capacitor discharge" push-button
7. Blocking push-button
3. Regulated Power Supplies
Regulated power supplies are mounted in units Rampli-
2ier, audible alarm" and "oscillator".
The ionising voltage /200 v/ is obtained from the rec-
tifier placed in the "oscillator" unit.
Sismitaneously the same rectifier supplies the tubes
of thelow-frequenv oscillator and the 411E8 tubs of the emis-
sion stabiliser.
The power supply is provided with electronic voltage
stabilisation. The accelerating voltage is Obtained from
the oscillator power supply and from the power supply source
mounted inside the unit "amplifier, audible alarm" provide
200 v.
Both power supplies ere connected in series so !bit it
is possible to adjust the accelerating voltage from 400 T
to 300 v by means of a 5.6 kilo-ohm potentiometer shoes
slotted axle is brought out to the control psnel.
The stability of the rectified voltage is t 10 with
mains voltage variation of * 150.
The output voltage of the power suppliosts set *hen
adjusting them at the facto w by means of potentiometer
NOFORN
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SECR7
NOF ORM
56?
whose slotted axles are brcught out to the front walls of
the chassis pertaining to units "amplifier, audible slam"
and "oscillator".
They should be used only when replacing the tubes for
setting voltage equal to 200 v.
4. A.C. Anplifier
s/ lirst / electronetiric/ stage. /Figures 9 and 15/.
When detecting looks the helium ions reaching the col-
lector of the mass spectrometer produce ion currents of
the order 10-14 - 10-11A.
To ensure detection and quantitative evaluation of
these currents, there is an ampligying device in the leak
detector as well as a low-frequency oscillator previdifit ,
5.7 cps. at 10-16 v.
The oscillator carries out sa maxillary fInetiorby
modulating the ion current flowing to the dealber,eellmeimr.
The aaplifying device comprises an s.c. amplifier, ma
audible alarm /siren/ and am output aster and it posterns
the nein function - amplification and indication of nods-
lated ion current.
The 611X t4be of the maplifier first stage, together
with the high-resistance resistor is placed in th; thembel
of the mass spectrometer /714.10i.
other conponents of the first stage are mounted in' '
unit T-10.
Ouch a construction does noteequire special high-resistance outlet and additional shielding because the ohms-
ber is a sufficiently reliable shield.
SEE5:
NcFoRit
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- 37 -
rIgcARA4
Ialt?current of the mass spectrometer is passed through
a resistor of very high resistance - 1.5 x 1010 ohas /i.e.
15000 uegohms/ and the alternating voltage Obtaised across
.this resistor is supplied to the grid of the first stage.
This4esistor is simultaneously a grid leak 'Resistor
of the first stage and is called "input resistor of the am-
plifier".
As the input resistance is very high, the. insulation
resiptance of the insulators securing the high-resistance
resistor should be very high /about 10-12... 10'11 ohms /.
A fixed 15000 uegohn resist or is used as ma input re-
sistor of the amplifier.
A small-sise tube of 611(1I type iodised as an auplifying
tube of the first stage. This tube operation in a stromg
external magnetic field and at lowered supply voltages.
The plate voltage is in the range of 5-8 v, and the
screen grid -voltage is 25 v.
The filament voltage equal to 3.5 v is Obtained from
the selenium rectifier mounted in unit 1=10.
The bias is due to the leakage current of the .grid.
The first stage is fully supplied from the rectifier
mounted inside unit 2=10.
Voltage gain factor of the stage is of the order of
5 to 7.
Switching on the stage is carried out by means of the
toggle switch "radio unit" Which is common for thikriltdpV
?N`OnlloRRI
assembly and is placed on the control panel.
The first stage is connected with unit T-10 by mesas
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1?????.????????,-,,
SECREINOFORN
of a Shielded csblo whose plug is inserted into a 6-pin
black nounted on the chatber.
The base diagran of the plug is shown in Pig.12.
Fig.15. Unit T-10. Amplifier and madiblo
Alarm. General View.
1.
68 tdbe
6.
6C4C ftbe
2.
64 tube
7.
CI-3C tube
3.
6X6C tub?
a.
5U4C tube
4.
6D?C tUbe
9.
Supply cable of the
5.
TU-0.1/0.3 tube
electrometbie stage
b/. Second and third stews /Pig.15/.
From the output of the first stage the signal is
plied to the second stage of the amplifier placed in umit
26.10.
The main feature of the amplifier is the applifisatima
of low frequency /5-7 ops/ whereas the remaining frequessies
/higher than the main frequency/ are suppressed with filter,
eapacitors of 0.2 mid connected in parallel with the
Ube. of the first and the second stages.
SEM
NEC43-60
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NOFORN
-39-
frequencies lower than 5-7 cps caused by various
noises are suppressed by moans of block capacitors.
The amplifier, being of the B.0.-coupled typo uti-
limos tubes types4kg sad 414, with an output supplied to
the diode detector 6X6C.
There aro two 30 kilo-ohm resistors at the detector
output. An output meter for 300 ma. being performed as a
separate unit is connected in series with sae of those ref
stators.
Voltage fromthe socoad resisLor is supplied to the
audible alarm /sired notated insideftie same unit
the overman voltage gels of the amplifier /icaludimea3.
the eleetrometric stage / is about WO.
Ta, potentiometers are plased on the amplilfior
and their slotted axles are brought to the freatImall.ev4;
ly mesas of the right-hand poteatiameter,ometigp qua,
smooth/7 adjust the applificatima. hipt)ler
- The left-hand poteatiometer is Moises& forspd
the voltage which is supplied to the omplitier1m.44, sk0i.v?.1
serves for adjusting the aseeleratingtvoltoge,ra. , ,ratT_18.4'
A4j4stmeat by moons of p poteutioneter eamAmparr
aut. only whoa replacing the tidies.
Au audible leakage indicator /siren/ asdisa eleptromir
eally stabilised power supply are also mounted La
?
/leo regulated power supplies/.
Th. audible alarm /sires/ is a thwratroa oscillator of
the 211-0-1/0.3 type. SECT
The tone of the generated oscillations varies spat
hUDFORNI
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I,SENET
NICYFORI%
changing of the bias on the thyratron grid.
The bias to the thyrstron grid is supplied from the
output of the *uplifter T-10 detector, i.e. the pitch of
the siren sound changes when the signal appears at the
detector.
Upon switthing on the thyratroa ?spinster the ampli-
fying stage utilising the 61160 tube is switched on and this
*stage supplies amplified audible oscillations to the loud-
speaker.
The loudspeaker requires 1.5*. ?
Volume of the audible alarm is controlled by simian of
allolume coatrol" potentiometer placed on the central penal.
The pitch of the audible alarm sound begins to lower
von entering of helium into the mass spectremster, and
upon approaching the 'overt tones, it can entirely cease.
The sound reappears as a result of decrease in helium gum-
La the sass spectrometer. The sound becomes higher
when the quantity of helium continues to decrease.
50X1-HUM
5. Resovable Output lister ina.16/.
The output meter is constructed as a separate un1t2-18 I
wad is connected to the amplifier output by means of a shield-4
ed cable terminated with a plug.
The output meter has two neasureneut ranges full
seal* deflection current being 300 an /sensitivity bmiteih
in position XI /and 3 ma/ x 10 I.
The hose is laid in a special compartment closed on
the rear panel df the meter.
INCIFORAI
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SECT
NOPORY,
-41 -
Pig.16. fait T-18. clutipt:Meter
6. ilowfireememar CiaelllMtaringal7/
The osollIater is plaeatia41404104t and is de-
signed for periodic variation of the Igeliiiag voltage
magnitude, that is, of the lei eurimmii.nolOtade in the celv
=NJ
lector circuit.
Oscillation frequency of the oscillator is in the
range from 5 to 7 cps.
Maximum output voltage of the oscillator is 14-16 v.
The oscillator circuit comprises two 6H7C tObes.One
tube operates as a "RC" oscillator and provides voltage
/about/3 vi at the output of the stage.
The other tube servies for amplifying the voltage aad
it operates according to the push-pull circuit. Voltage
about 14-16 ? is obtained at the output of the second stage.
? ballast tube of the 0:85-B-5.5-12 typo is connect-
ed into the filament ciruit of the first tuba /oscillates/
to stabilise the output voltage.
SD7.-3
NOFORN
50X1 -HUM
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SEE'
- 42
NOFORNI
The oscillator is power supplied froa the rectifier
/see "Regulated power supplies"/ mounted inside the same
unit. This rectifier supplies also voltage for ionisation
as well as accelerating voltage and voltage for the emis-
sion stabiliser tube 618.
Rig.17. Unit 2=12. Low-Nrequesoy Oscillator
Geaerel View
1. 6170 tube
2. 0.85-1-5.5-12 tab.
3. 6040 tabs
4. iie *Abe
5. CX-10 ties
6. 914e Ube
Two potentiometers ars located on the oscillator sibles=
ii and their slotted axles are brought oat to the front-eall
By using the "amplitude adjustment" potentiometer it is
possible to adjust smoothly the voltage magaituas if the
oecillator from 0 to 14-16 v.
By means of the "voltage adjustment" potentiometer it
is possible to adjust smoothly and in narrow limits the segl-
situde of the rectified voltage of the rectifier.77,7
vicdF'ORNi
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-NOFORN
-43-
?
?
Amplitude and voltage can be adjusted only when replac-
ing the tubes.
III. OPERATING INSTRUCTIONS
A. Preparation
1. After receiving the instrunent from the factory and
prior to its setting into operation, remove first the wooden
straps which secure magnetic system in transportation.
Then proceed as follows on the control panel before cm-
'meting the instrument to the stains:
A/ Set the switches tn the "off* position;
b/ Set the "sensitivity" knob in the "off* position;
Cl Turn the wvolune control* knob to the extreme right
hand position.
2. Sonnect the three-phase 220 v mains to the terminal
board on the left-hand side of the look detector.
3. Connect the leak detector rack to theearth" moils
a special terminal placed on the sane board.
4. Insert the plug of the output meter into the saki*
em the loft-hand side of the leak detector and tit em it
to the end of the thread.
5. Check if the rotation direction of the fore-vasuma
pump motor is correct. To obtain this, remove the driiiag
bolt from the pump and switch on the power supply of tie
motor. The aotor pelley ehould rotate clockwise provided
ems stands in front of it.
To change the direction of motor rotation, change the
location of the two phases in the three-phase mains of the
motor supply.
SECL. "77
NOFORN
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NOFORN
B. Bwitcning
o n.
1. Switch on the "fore-vacuu* pump" switch on the con
-
61001 panel. As a result, the neon lamp should light and
the fan blower should begin to operate.
2. Remove the clutch fron the rubber hose of the fore-
?MMUS pump.
11. Switch on the "radio unit" switch on the control
4. 5-10 minutes after appearance of the
the "vacuum" indicator, switch on the "diffusion pine'gritlh
%tie "vacuum" meter may indicate 60-75 scale divisions/.
5. In 20-30 minute' the pointer of the "mourns" Judi-
octor begins to move to the left and this'iridioatisiii14-
Was/Ling
of the diffusion pump operation.
When evacuation operation takes pliroe,'iheialiiirlet
VA 1 a
lii.eitpat looter pointer is subjected to
rem sound appeams and disappears. Switch 411AI
4114,17,!:?.1_. ? r__;LIM gvpi-em
Clay When pressure has lowered below 10 divisems.' le 46-.
2u
tan
this :
i/ oath. "cathode" switeh;L- &b.
ue-tr set lite "sentitivity"4 eferitek,ia piisitiencrretzero,;..
Poottilk press upon the pustten-afterAm1i44elat/i-
tIthe d/ the pointer of the "eulaiiion'm
viate from the sere position.
r
The nagnitude of the emission current should be the
'renis of 3-5 as. If the emission current is less than 3 as,
est as follows: SEFL1
a/ remove the front door of the instrument samwstane.
NOIFOIRMI
onsly operate. the Mocking system and tide pointer or Ike
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NRYFCMR1s$
instrument deflect to the left/;
b/ turn to the right the axle of the "emission ad-
justment" potentiometer on the lower unit "pressure gauge
rectifier, mission stabiliser";
0/ close the front door of the instrument;
d/ press uppn the starting push-button.
If the emission indicator does not indicate and the
rod signal lamp lights, this means that the cathode has
h off
burned out or that there has been some break in the method*
eircuit /for example, the supply plug of the chadber has
keen removed/.
melt -
6. Fill the trap with liquid nitrogen.
uzLmg
7. To fully adjust the mass spectrometer for helium,.
set as follows:
-v Jr ahOrt
411 without making any connections to the throttling
1.4.wgz
valve, slowly turn its handle obtaining such an indication
? - I. *vapour.
the "vacuum" indicator scale which corresponds to tile
,Iad the back
-45
rking pressure of the mass spectrometer vacuum system
mpertion
1.24 divisions on the meter scale/.
-1- V/ by turning the Raoceleration voltage* control,/ ob-
. , _ -.
. , _
?
'lain suck a deflection of the indicator pointer from save
P.-., - 7 to ahSncsevi
:position which corresponds to henna air peak. The maga-
to this ? ,. kept wider
.,_:tmde of the accelerating voltage for this instrument is gi-.
Algt
-VOR in the test certificate.
not bA _,
or Gloss the throttling valve. The pointer alike
. iT:ek.
ditL
t meter should deflect to the left.
B. Switching off
on ,,.1-To switch off the instrument, sot as follows: SEcp:T
close the theottling valve; NOP'ORV
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rj.t4OFORN
b/ switch off the cathode by setting the "sensitivity"
knob in the "off" position;
Cl set the "cathode" and "radio unit" switches in the
"off" position;
d/ switch off the diffusion pump and wait during 15-20
minutes until the diffusion pump has cooled;
a/ press the rubber hoee which connects the diffasisa
and the fore-vacuum pumps by using clutches, and switeh off
the "fore-vacuum pump".
In such position the instrument can remain until the
next switching on.
AOTES:l. If it is necessary to check the vacuum daring
evacuation the radio unit should be switWhed ea
by means of the "radio unit" switch for a Mime
time. this prevents the pressure gauge of the
leak detector from contamination with oil vapour.
2. It is advisable to open the lateral and the bask
doors of the leak detector during the operation
for better cooling.
D. Instruction for helium use in the leak detector.
Pure helium /i.e. not mixed with air/ usually is Shipped
to the factories in metallic cylinders where it is kept under
high pressure. It is natural that in such a state helium elm-
not be used for operation in the leak detector. In leek de-
tectors helium should be used under low pressure, and, in ad-
dition, it should be used being nixed witbiir for the sake of
economy. Helium used for operation with the leak detector
is generally kept in special reservoirs, the so called gee-
SEW
NOFOR
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Molders. Helium should be transferred from thel?s cylinder
?ts the gas-holder uy means of a gas pressure reduchtfk de-
mVise. This device /Fig.18/ has two outlets with two
trikgs gauges and one cock. An outlet with a prewar*
jis is connected to the gas cylinder, and a low-pressure
...4i0let is connected to the gas-holder. All cocks should
V?e closed. Then the gas-holder is filled to the brim with
/through a funnel/ and all cocks open, including the
floAer cock. Pressure not exceeding 2 atmospheres is
liilmtained at the gas-holder inlet by means of a pressure
'A*A4maimg device cock. As a result of helium pressurei, war-
50X1 -HUM
from the gas holler will pour over the top of the iambs'?
toter in the gas holder will occupy not more than ome
of its volume, iilling with helium Should be stopped.
KU:7
lig.18. Gas-holder, pressure reducing device
and helium cylinder connected to thet410POR14
transfer helium from gas cylinder to the
gas?holder.
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:SECRET
.48-
WYFORTIJ
A gas-holier may be used for operation with the
leak detector but it is more advisable to use a glass
flask. Usually this flank has a circular cross sectioa,
with two small necks, each of them being provided with
a cock.
Fig. 19 show* how helium fills the glass flask. This
flask Should be filled with water - as much as 'me
third of volume - and connected to the gas-holder, both
cocks being initially closed. Then the cock of the gas-
holder and both flask cocks should be open. All cocks sloes
and the flask is disconnected from the gas-holder after
all water had been removed from the flask due to laalima
pressure.
As helium mixes with air which is in the flask elm the
latter is being filled, the helium concentration will be ap-
proximately 25-30 ti after the filling has been accomplished.
If, during the leak detector operation, water in the
glass flask with helium, occupies almost the whole volume,
this indicates that there is very little helium in the fleet
and fresh quantities of helium sbouild be added.
Both cocks of theflask with helium should be closed af-
ter operation.
A small tank with water and a flask with helium immerse 4
in it as well as a small pipe with a blast device are *how
inns. 20.
It is not adttsed to use oxygen cushions for helium sto-
rage due to a high helium leakage.
SEC.73 NOFORM
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moroFFN
? 49 ?
PIC IS
-1,01.114
crl?SCItti
Pig. 19. Gasholder oonnectild to toa
e
glass flask. ri4 the
3tnillng
use
- 14f.i
Nig. 20. Umall tank with water and a glass
flask with helium Immersed ta it.
The flask is provided with, pipe
having a blast device.
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SECRET
50
NOFtHR141
IV. SERVICING AND REPAIR OF THE MI ..eA
LEAK DETECTOR;
Good maintenance and proper servicing ensure reliabi-
lity in operation of the leak detector 1/4and preserve its
working qualities. Therefore, it is essential to handle
carefully the instrument and to observe principal rules re-
ferring to naintenance and servicing.
1. Maintenance and Servicing
The instrument should be kept absolutely clean. When
not use, it Should be covered with canvas cover /supplied
with the instrument/. Strict vacuum-preserving rules should
be observed when opening the chamber or any other compcmegts
of the leak detector vacuum system. It is not advisable to
touch with hands parts and their surfaces placed indite tiS
vacuum system unless it is urgently needed. Shea installing
detachable parts into the chalber, it is advisable to use
clean tools /pliers, tongs, etc./. Dust, dirt, orgenic mat-
ter /oil, masout, gaus4 fluffs, cotton, ete.
trotting into the vacuum system of the leak detector mmy maks
it impossible to obtain working vactuun in the leek ditmeter.
If the vacuum system is highly contaminated, all parts
should be subjected to cleaning. Such cleaning operation
takes
'-
takes considerable tine - about 8 hours - amd it is
carried out in case of necessity/ se. for instruction
referring to the dismantling of the vacuum wfstem and Italians
pf its parts/. To maintain working vacuun in the gys
Ct72
it is necessary / in addition to observance of strict
NopoRt4
ronv Aooroved for Release @50-Yr 2014/04/21 CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
SEcrr
-51-
NOFORM
vacuum-preserving rules/ to maintain in good repair all
pubs and to observe a number of rules when operating the
instrument. It should be noted that there are some special
features in the maintenance of the AM-20 pump mounted in
the ung -4A instrument.
To ensure normal operation of the diffusion pump, its
heater should be switched on only upon sufficient ilitial
rarefaction /60-75 scale division on the "vacuum" indicator/
sad with the presence of the cooling air jet of the fen
blowesk. No pump operation is permitted without additioaal
waling. As a result of prolonged operation, the working
liquid / i.e. oil / of the pump can partly lose its
working qualities. Sharp deterioration of wow& qualities
at oil /i.e. oxidation / may occur as a result oZ air pene-
tration into hot pump under atmospheric pressure. Ube*
eases the pump should be removed, washed refilled with
!reek oil.
2. lain operating rules referring to the vacuum magi
slit. leak detector.
1/. Vacuum system as a whole sad all Its oompements
Mould be kept in evacuated state.
2/. Pour liquid nitrogen into the trap of the leak de-
testor only just before the tests /i.e. before opening the
throttling valve/. Liquid nitrogen should be removed before
switching on the heater of the diffusion pump. Absence of
li4uia1itrogen in the trap facilitates the removal Itror ?
reign natters and dirt which could penetrate into the vacuum
Witten of the !ITN -4A instrument during evacuation pperation.
WW0101
Declassified in Part - Sanitized Copy Approved for Release 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
- 52
0!J Liquid nitrogen is removed by the blasting it
out by means of compressed air or by the 'nib-
merging in the trap of objects with high heat
capacities. Care should be taken *hen carry-
ing out blast operation, taking into account
that liquid nitrogen may cause burns on huasin
skin.
3/. It should be kept in mind /when stopping the
It1-4A that the fore-vacuum pump can be stopped only af-
ter the diffusion pump had been entirely cooled. Before
stepping the pump, it is essential to tighten the connect-
iv* rubber hose by using the clutch. If this is not rul-
rp...4,
filled, atmospheric air may penetrate into the vacuum Aye- ,
4,t15-
Ms or oil may be sucked in from the forwormsuum pump.
'he vacuum system of the UT11-41 leak detector should
be air tight. If there is a leak in the system, the pointer
if the "vacuum" indicator stops without reazhimg its mensal
JOeition /1.5 - 2 divisions/. By !Jilin* the trap with li:
old nitrogen one practically does not affect the indioatiess
if the "vacumeindicator. If pressure in the srstem does, net
exseed the working pressure /20 scale divisions of the liva-
emms" indientor/1 the leak can be detected by means of the
leak detector itself blasting with probe gas /heliva eu.
the spots where leaks are suspected.
If pressure in the vacuum system exceeds the workiag
pressure, it is advisable to detect leakage spots by scans
if successive inspection of individual components.
50X1-HUM
in Part Sanitized COON/ Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
50X1 -HUM
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
I Er'
?
-53-
WYFCART4
kor preventative reasons it
aysteaatic checking of the vacuum system' of the nTm-4A in.
strument foiair-tightness. Ail observed leaks should be
eliminated at once. Lack of air-tightness in the vacuum
system decreases the sensitivity of the instrument. Absolute
of working vacuum in the vacuum system say be caused mot
only by leakages but also by faults in the pumping devices
or by high contamination of the components. If leaks have
not been detected as a result of checking, be sure that the
fore-vacuum pump is in good repair and carry out cleaning
and oil replacesent in the diffusion pump. If in spite of
the above aentioned measures, there is still no working
pressure in the system, it means that the system ismomignima-
ted. Dismantling and cleaning of the vacuum system are dee-
cribed later. thc,dei
3- LA-2.-1A-t-1
a/ Cathode replacement
When installing the cathode observe the followimurules:
1/ The cathode should be installed about 0.5 mm Shim
the ion source box.
2/ The filament should be located above the mididle;part
of the upper slit of the ion source.
3/ The filsment should be so tightened am4o elinimate
its sagging and deflections in any direction has
being heated. Required tension is ensured by
pressing the spring of the holders by 0.5 an.
Then the cathode is switched on for the first tine,
sharp deterioration of vacuum is observed in the ohalher.
r r N OF 0 n
?
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Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
,Gr.?
SBM
.54
NOFORN
The cathode begins to evolve gases and, therefore, it should
be subjected to "ageing" by switching it on for a short time
at low sensitiviiv of the 11T11-4A instrument - untili the
gassing has ended.
The replacement of the cathode is a very important ope-
ration and the service of the leak detector depends on the
quality of this operation.
b/ Ion Source Cleaning
Ion source is a very important component of the sass
spectrometer chamber. Its normal operation ensures good
sensitivity of the IIT)!-41 instrument.
The ion source may become contaminated when in opera-
tion /especially when contaminated equipment is tested for
air-tightnesni.
The upper plane of the ion source box /under the ea
is especially subjected to contaainatioa whsreas glass iimai;e:
lators and the diaphragm are not collimated so often.
Cleanliness of the upper plane of the ion source bon
should be checked each time the cathode is being replaced.
It should be cleaned by scraping off the carbon deposit utak
some sharp tool and subsequent rubbing with gauze dliehtly
moistened in a solvent.
c/ Pressure mute (amnia&
Pressure gauge installed in the sass spectrometer shame
ber should be cleaned approximately after 100-hour operation.
Carbonized oil residue deposited on the inner surface of the
gauss should be removed. Vibration of the "vacuum" indicator
pointer indicates contamination of the pressure gauge. The
NOFORN
ail I. 4
?
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Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
SEC:7
NOFORN
pressure gauge should be removed from the chabmblor and
etched in a weak alkaline solution.
gni: Prolonged etching is not permitted because it weak-
ens the insulator and the rivet of the body bottom.
Washing and drying should take place after the etching.
Then the pressure gauge is reinstalled into the chamber. 'he
pressure gauge ring ahould be located parallel to the bottom
of the body, otherwise the indications of the "vacuum's indi-
cator will not be correct.
d/ Chamber Cleaning
Cleaning of the mass spectrometer chamber is a very
important operation and it should be carried out oaliy Wham
the chamber is highly contaminated. The GUNN'r should be
removed from the instrument and *Mad befslased a table:
Then it is necessary to remove from it the pressure iimMOO,
the shield cover, the 6114 tube, the high-resistanu reelabi.
or as well as the cathode and the collector.
????????.e..."
-55-
Upon removal of all detachable components the *bomb*,
should be cleaned. To do this, some carbon tetrachloride or
other should be poured into the chamber, and then it is ne-
cessary to rub all inner surfaces of the body, the cher
and the non-detachable components /ion source, swoon,
aphragm/. This should be done by means of a small ecrudri-
veAhose tip is wrapped with 'sus*.
gm: The chamber cover should be cleaned only after
the removal of the rubber space from the cover
groove.
lubber spacer used for vs um sealing of the cover.
NopoRN
EFP-
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50X1 -HUM
Declassified in Part - Sanitized Cop Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
.SECFT
-
and the billitaltody should al
Alcohol, carbon tetrachloride or ether should be used for
this purpose. neither petrol nor acetone should be applied.
The spacer should be cleaned by rubbing it with a piece of
gauze moistened in a solvent. To avoid deterioration, the
spacer should not be kept submerged into the solvent for
a long time. After cleaning the spacer is subjected to dry-
stuck to its surface. Only then the spacer should be laid
into its groove. After this all removed components should
be re-installed into the chaaber. Then the dhalber should
be connected to the UTR -4A instrument and should be pumped
out.
a/ Instruction for dismantling, am, washiaa
of the UTI-4A leak detector vassals erste.
The INN -4A leak detector vacuum system should be dis-
mantled and washed only under the following coaditioaa:
1/. high contamination;
2/. failure of individual components;
3/. lack of critical vacuum in the system.
Frequent dismantling of the vacuum system results in
less of its air-tightness and deteriorates its vacuum pre-
0?,
perties. If the operator observes sone fault in any single
compnent, only this component should be dismantled.
Complete dismantling of the vacuus system should be
carried out in the following sequence:
1. Remove the magnet after loosening the stop saran
and complete unscrewing of the screw pressing the sheenier
cover.
SP"' T
NOFORN
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Declassified in Part - Sanitized Copy Ap roved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
.SECP1.7
NOFORN
2. Admit atmospheric air in o em penin
the throttling valve.
NOTE: When atmospheric air is admitted, the chamber co-
ver should be held with hand.
-57
3. Remove the chamber cover.
4. Remove the chamber by loosening the flange from
coupling bolts.
5. Remove the throttling valve in this sequence:
a. Remove the flyWheel;
b. resove the stirrup;
c. unscrew the coupling bolts.
6. Remove the rubber hose from the outlet piece of
the diffusion pump.
7. Remove the ventilation shield.
-
8. Remove the diffusion pump by unscrewing the bolts
coupling itsflange.
-,,ro le-
9. Remove the upper panel of the instrument by un-
oul2p
screwing its fastening screws.
'fLung,
10. Buoy, the trap by unscrewing the fastening serene
which secure the trap to the plate.
nctor
11. Remove the fore-vacuum pump and the shook absorber
im-
by loosening the nuts which serve for securing thiTixing
angles the latter being removed with the pap.
- - to
12. To assemble the vacuum systlm, proemed in reverse
e the
sequence.
Oil in the fore-vacuum pump can be replaced on the spot
by using the drain and the discharge plugs.
To replace oil in the .00-20 diffusion pump, est, as
follows:
1. Remove the punp.
cror-r7
NOFORPil
50X1 -HUM
fi
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Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
.SECT
-58-
NOFORNI
2. Drain off the used oil using the dmmin plug.
3. Wash the puap.
4. Use a new spacer forsoaling the drain plug.
5. Pour 100 ca3 of fresh oil.
b. Put the pump in its place.
The liMR-20 pump should be washed in case it is contami-
nated or if Oil is being replaced. To do this, act as folowst
1. Drain off the oil by using the drain plug.
2. Wash the pump from inside by using a solvent /Garbo&
tetrachloride or aviation petrol/.
NOM Washing should be carried out until the solveat
drained off from the pump has become pure /net
less than 54 times/.
v
3. Blast the pump with pure air until the solvent odour
has disappeared /wars air can be used/.
As the pump is not subjected to dismantling, no moss Sow&
-%
tailed cleaning of its inner parts is necessary. If the pump
under test does not imparove critical vacuum after
it should be replaced.
son: Gas is eliminated from the pump and the oil eller
cleaning, and, therefore, the Grit/nalis-
-
proves gradually and reaehee its 111141411 vane
proximately after 8-10 hours, It* is *Mesas Is
subject the pump to "ageing" with the view et the
most rapid removal oStoreign vapours and geese
-2
from the 1111-4A leak detector vacuum system
/Without having liquid nitrogen taAhe tread. .
Individual components of the WWW-4A Vacuum anima
. .
should be washed in the sant way as the components of the
SEPf wopow
50X1-HUM
Ti
neclassified in Part - Sanitized Copy Approved for Release 50-Yr 2014/04/21 CIA-RDP81-01043R003200080007-7
50X1-HUM
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
- 60
SECIFT
3. Extreakrarresidual noise level /normally it
equals to 2-3 scale divisions on the output meter/.
4. Lowered emission /normally it equals to 3-5 ma/.
5. Incorrect position of the source diaphragm and
especially of the cathode in the mass spectroseter chsaber.
6. Operation under lowered working pressure /normal
pressure is 20 divisions on the "vacuum" indicator scale/.
To ensure qualitative checking of equipment for air-
tightness it is essential to check regularly the seasitivity
of the leak detector /not less than once a week/. Sensiti-
vity of the leak detector /not less than once a week/. Mew.
sitivity should be checked judetag fres the noise level of ale
helium in the mass spectrometer chamber /20 scale divides*
on the "vacuum" indicator/.
Prolonged operation of the leek detester in clewed pre-
mises results in increase of helium conceatratioa in the
air, and this nay also lower the instrument sensitivit7 to
a considerable degree. To avoid this, the pruaisee Sheol&
be regularly ventilated.
=Alb
Item
No.
Drawing No.
D
????????111.111MIMMINIONIMOi
d I
ar
galla
Deststi
1
20002-11
8
5
4
1
Blast devise
2
25603-14
63
53
4
3
Valve aad trap
3
25616-17
6
-
7
11
Obaiber
4
25617-06
135
125
4
1
Ohaiber
5
25649-12
65
55
4
1
Valve
6
25619-13
44
6.5
4
1
Valve
????????...????????????????????????1?????????????????????????????????????
Table of ribber sealing rings. Stt
reIrPrt7
NOFORN1
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Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
IMDP
LAW3FIOSR4
lxplanation to circuit diagram UT-4A
1. Amplifier and audible alarm. ,te
2. Oscillator,
3. Pressure gauge rectifier and emission stabiliser
4. Control panel.
5. Chaiber,
6. Output meter.
Fig.21. Circuit diagram .
of the T-18 A removable output metelv ,
NOFoRNt
50X1-HUM
t,
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
.62
or
seghtifir of components to oirouit diagram of T-8 A twit
Qum- 50X1 -HUM
tion Awe and Type Rated date tity lote
1
2-pole ewitsh, 15 A
3
2
Pose DR -10A, 1 37 am
3
3
Rem leap MR-3
4
4
Resistor IT I.56000-a
56 biloeboe
4
5
81gaa1 Lap, 6.3 ? 0.28A
1
6
3-pole switch, 15 A
1
"Vaeuna" indisator, 1 am
1
8
"Aeeelerating voltage*
1 2-pole ewitsh, 15 A
2 Pose DR -10A, 1 37 am
3 Rem leap MR-3
4 Resistor IT I.56000-a
5 81gaa1 Lap, 6.3 ? 0.28A
6 3-pole switch, 15 A
"Vaeuna" indisator, 1 am
8 "Aeeelerating voltage*
3
3
4
56 biloeboe 4
1
1
1
indleator, 500 v
9 ?Bsissisa? indleater 10 um 1
?
10 Oapaeltor MK* 10 EU 1
to
950
21 0?Paoitor 3114-1a is
k
SE:
950
21 0?Paoitor 3114-1a is
NOFORN
SE:
NOFORN
Declassified in Part - Sanitized Copy Approved for Release 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Co .y Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
SECt--7
Blocks Nos. 1, 2 aria
144?127'011N4Jnit T-18 A Circuit Characteristics
Contact Circuit
Circuit block C parameters
o t ?
1-1 -,- 3-phase mains ---,220 ?
1-2 m? so
" OM on
I/ '.%- 220 v
1-3 -"-
??? as
" ,-;220 v
1-4 Suppix to fore-vacuua pump motor --220 v
1-5 ??? SD
" 4WD ow
n 99
MO SO -220 v
1-6 so an
" OS oni
le W
OM ..m? -220 v
1-7 Supply to diffusion pump plate -250 v
1-7 ?sio Os
" oft 91... W
SD OM ,---220 v
1.9 Supply to radio units -220 v
1-10m
- -.
- - - 220 v
Supply to cathode - 220 ?
2-1 ....m -"... ... ^' 220 ?
2-2 To emission stabilizer +200 v
2.3 To pressure gauge rectifier -1200 v
2.4/20-6/10
.. .... , ?
OS NED +1200 ?
2-5/20-4/ To chamber/accelerating v voltage/ *400 lr
2-6/20-3/ "karth"
3-1/20-1/ Supply to cathode --8 v, 4A
3-2 To audible alarm 61116? tibro
3-3
OW AM IIED
3-4/20-1/ Supply to cathode
3-5 To oscillator rectifier
3-6 To amplifier rectifier
? a v, 41
-.200 ?
+200 v
SEC,
-
NOPoRN
50X1-HUM
rlarlaccifiPri in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
50X1-HUM
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Contact
block
SECIA:7-
ttOporm
- 63a-
Circuit
circuit 111 0 t ?
2!Faseters
3-7
Supply to cathode
-8v, 4A
3-8
To oscillator rectifier
+200 v
3-9
To oscillator
+400 ?
5-10
Relay supply circuit
+260 v
4
:*)
N ?PORN
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
SECRET
NOFORN
Schedule of oomponente to *Inuit ampler of mit 16D2
- 64 -
50X1 -HUM
-"PM-
tum
Awe and type
bin
data
rated
Ii
tity 314.
1
2
Tressformer 20-25
!Ube 5q4C
3
Voltage stabiliser 0130
4
ampacitor ? .9.1
1 add
I
5
Resistor
2.2 arida,
3
AIM 0,54,24
6
Tabs 6040 41110/
7
beim*" XV o,10041
100 ebro
3
Salasiare reetifier 20.45-171
9
Choke 4.13
_
10
Capasitor 811(4414 318
200 dile
4
11
Sasiates
Si Igiashats'i
a
MIT 24410004
12
Desisiber MIT 0,5i.6100041
SI knoiria
13
ibutaeor MIT 0,5.0004I
50 Mod= ;
3
14
ilosiator II? 14104
5111 kneeler:
19
Ompasiter 81*.la II X
isied?
16
angst trairfourr 111.46
17
TaNaseofiker
1$
Tau agea /6?6/
19
Tau so min/
20
Ileffigter WiT 14064
360 =IAMB
21
Resistor (114-2?45A4
5
22
ICI3r4114100-2-II
2 itge
SECT
NOFoRpe
Declassified in Part - Sanitized Copy Approved for Release 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
50X1-HUM
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
.SECT:rtwerakr
2
3
4 5
as
24
25
26
27
as
29
30
31
32
33
34
35
C
co Mt laPasit"
ltesitotor
Thoatraa
%be 6350
%be sk
Issistor
Oa posit ow
Oapaeltar
Basiwtor
Ilmaiatsr
lbsistor
WIT 0,5-0,1-11
Tx-I-NI /WNW
/6rd
(alt)
(114-244500h4
laT 0,5400041
MIT 0,5-0,241
0,5441
Iiireawawnt reelefort
0.5 w 100.200 elles
36 Ilesistcw 'or? 0,54000041
17 amolx"r KIT 0,5-62000.11
B?sister 1-5100041
39 bail*" iaT 1-2,241
40 lam ac..i IA, I ar 4E3
OmPfs?itior 10311412400.0.2-II
42 001. with bleak
43 issigtor 1-0,141
44 Usistor Ma 0,5-3300041
45 losistet MIT 044,8241
46 iiewieter WIT I-0,I41
47 OsPolitor K8114U-400-0.025-11
1
100 kilookas 2
1 rain I
100.200 Amp 1
20 kneeing 1
62 kileakaa
51 kneehole
202 swasimis
Oa ad%
100 kneeing i
$00 kileshos
33 kneehole 1
1120 kneeing I
100 kileekuo
0.0t5 ate I
SE07-
npr.lassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
SEMI
wommem
Block No.4.
? 66 ?
Unit T-10 Circuit Characteristios
Contact Circuit
o t ?
block Circuits
parameters
4-1 Accelerating voltage
4-2 Rectiffer voltage
4-3 To output meter
4-4 To output neter
4-5
4-6 To mains
4-7 Barth
4-8
4-9 'NI volume control
4-10 To volume control
4-11
5-12 To mains
42-1 MIL tube filmiest
42-2 611III tube control grid
42-3 Prams II voltage
42-4 611III tUbe screen grid voltage
42-5
42-6 Berth
+400 v
200v
---220 v
'220v
+ 3.5
+400..v
-
a
SECI]i
Noor
50X1 -HUM
ner.lassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
SEC ZT 1"4'1**
Sohedule of components to circuit diagram of Unit 2-12
Pbsi-
tien
1i.
as and type
QuautS-
da*a ty
rated
1 Fuse IE-.i 1A, 1 ge 45 ma
2 Poser transformer T0-26
3 Tube 544C
4 Tube 6040
5 Resister WIT 0,5400041
6 Resister WIT 1-2,24I
7 Resistor WIT 1-0,2-fl
8 Resistor /0-5.4-27000-11
9 Mho crac
10 Oapiaritor 8111-Isi
i000 elma
2.2 supgabmo
200 kiladems
27 kneeing
10 stds
11
&mister WIT 143400041
20 kileekas
12
Isaisto IT 1-6100041
51 kneeing
13
iNibe 6103
14
Resistor WIT 0,5-6100041
51 kilseins
15
Resistor WIT 1-0,3041
560 kilesion
16
Resister CII-1-2a-15A4
15 kibosh's,
17
Resistor WIT 0,5-62000-11
62 kiloslos
18
OoPaoitor 10-0.5-1-110000-11
2 Is
19
Resistor 10-0.5-1-10000-ii
10 kilodos
20
Tube 6R70
21
Berretter 0. 85B5.5vI2
22
Resistor WIT 0,25-2000-400041
2-4 kileelass
NOpoRN
2
1
1
1
2
1
1
1
1
3
1
1
1
1
1
1
1
1
1
a
50X1-HUM
neclassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
50X1-HUM
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
SECRET - 68 -
NOFOR
Posi-
tion
li!ime and type
in
data
rated
Cues-
tity
23
Capacitor KBP41'-400-0.I-II
0.1 mfd
2
24
Resistor LAT 0,25-0,114
270 kiloohms
2
25
Resistor (11-1-2a-15C0A4
1.5 kiloohmm
1
26
Reastor WIT 0,5410041
2.7 kiloohms
1
27
Output transformer n-23
1
28
Pass IIK-&150 me, 1 m 43
1
29
Capaoitor KW-1112-400-0.2-la
0.2 mfd
1
30
wire-woand resistor - 0.5-100-
-20'3 ohms
100-200 ohms
1
31
0aPsoitor KEINH2-400-0.II-11
0.1 mfd
1
NOFORAI
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
50X1 -HUM
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Contact
block
SEMI.
14orom - 69 -
Block No.. Unit T-12 Circuit Characterim es
Circuits
Circuit
parameters I
5 - 1
"Earth"
5 4
Oscillator output, + acceleration
voltage
300-400 v
5 - 3
Rectifier voltage
+ 200 v
5 - 6
Mains
?220 v
5 ?10
Oscillator output, +acceleration
voltage
300-400 v
5-8
Rectifier voltage
? 200 v
5-12
Mains
r-220 v
Srimp-r
NOFORN
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
SEOP7_
NOFORN
Schedule of components to circuit diagram of 'Unit T-14
50X1 -HUM
Posi-
tie*
11_ Nuts_ and tyro&
*In
data
rated
Qum-
tity
Tote
1 less IK,1a, 1 - 45 mm
2
2 onumitor immn24-n
1 mid
2
3 Transformer AT
1
-5
4 Transformer At-4
1
5 Transformer T0-27
1
6 Tube 21.12C
1
T Arsh-battea 5
1
aulatft WIT 0,5-0,2741
270 kneeing
3
9 tabs 605
1
10 Resistor WIT 0 ,5.0 ,141
100 wieder
2
11 Resistor NIT 0,5-L200041
12 kneehole
1
12 Resistor ca-1-211r45-A4
15 kneehole
1
13 Transformer 20-0
1
14 Transformer TO-31
1
15 Tube 6113C
1
16 Demister WIT 0,5-0,5141
510 kneeing
3
17 Demister WIT 2-2000041
20 kibosh=
1
18 Ifirs-wesumd variable resister,
200 Amiga w
200 ohms
1
19 Resistor WIT 0,25-33041
550 ohms
1
20 Tubs go /68177/
1
21 Dash-button 51
1
22 Resistor ma 2400041
5 kiloobas
1
gtettp:Ciam
Declassified in Part - Sanitized Copy Approved for Release 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
50X1 -HUM
Declassified in Part - Sanitized Copy Approved for Release ? 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
SECRET
NOFORI4
- 71
Block No. (..). Unit T-14
Contact
block
Circuit Characteristics
Circuit - Note
Circuit parameters
6-1 EA8 anode /to relay/ 4* 100 v
6-2 Cathode supply circuit ,---8 ?fr 4A
6-3 WS tube supply circuit - 200 v
6-4 Pressure gauge circuit + 1200 T
6-5 Pressure gauge circuit - 1200 v
6-6 Mains 220 T
6-7 Earth
6-8 Cathode supply circuit ---- 8 ?? 4 ?
6-9 68 tube supply circuit + 200 1r
6-10 Relay supply circuit 4* 260 ?
6-11 Mains /.?.- 220 v
6-12 Mains ,I. 220 ?
List of component parts to T-181. output aster
Position
No.
Component parts
1 Shunt for 3 ma; to aatdh according
to meter
2 Versatile shunt for 300 ma
3 Microammeter for 100 as
4 Two-pole switch
5 Three-contact plug
cr,(1q7:7T
LP...J.,' 3
NOFORNi
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7
6
*Se 50X1 -H0v9X1 -HUM
4t
0
Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2014/04/21 : CIA-RDP81-01043R003200080007-7