SCIENTIFIC ABSTRACT -

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• Collection: Scientific Abstracts
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• Document Creation Date: November 2, 2016
• Document Release Date: June 14, 2000
• Sequence Number: 8
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

TIM ANOMMIM' CIWXU OF T113 UECTRIC ESIsTIVITY OF TIM 9141h ALLOY III
THS WMIXTIG n=. `d. K=ar and 1. PoEb j~ln (S. 14.
List. Sve 'MaRnWAkacj._ffs-uk S.S.S.R. M~~- ~01948)4
and in
r-e-7 1~,P%Uvo chummi
5as- of :the oleo, resistance r in a loncitwiml
a t=avarso wgnotic field H. vere dotd. for alloy3.ft 754-2a 24o3 At
quencl-led Crter a=c&UQg ett t,~mpa. botwoon 700 and 25CP,, vidah
w vs-1, -to- te.U -disordered -and-to--complotaly ordovod------
condit1cm. Depending cu. its degree of orftr# this dUOY~ ChqftaS3 LtO
apontaneous magnatdmtlon and Its curie temp. (K. cmd Volke4uhteino T,
Exptle Theoret. Pbp. ;.U 723 (19-42)). In the miardeved sUts..
the shapes ot the curves ofc;ixg/r and Ar j fr as functions of at at 293
ad at 77QKe# ve mWogaus to those of pur-8 Ift In the uel~Wrhood of
the C~4 -joint- (mvierts - G*A4-, Zfiv 3153). - Ia tho-adued Oat% Ct
293PE.0 both artj/i md 4ri/-r -are nag., have close vduaq tJ=u*wUt8
W lm~rwae (in Mo., Val=) w1th Incrujoing H along Pmatioally the
(C*ntlnu,!d)
sue curve. At InUrze&ate degrees Of Ord
&t H Arjj/r chanzez it$
dep"ding Cm the degree Op order.
IMediste source OUPPIUS 11. Thon

aut-06100tronic UniBelon ra3ka the rhotoe2eo.
mission; &;, eaout Z
10o tho dwTit ourrent in about 10-1-0 amp,/sqP
cm.1 fran thc,"o on, V;io
autooleebro)110 01=0-2t im rVies ateeply with Ej,
Inerw-sing j.o7 ti---
with E irier(wing, 4 timea. ints. dopfim the
relation la - A-V-lo-q
Tho cathod-3 could be observed vinutaUy by awting
tho anodo rAth
vMmits) T.7hilo In photoeleo. amiss-.1on tho wbolo
surface of Via
eathod3 Is aeon to wdt unifomly., mtoelaetxonia
emission Ja stroav,
fieldo is confinod to discrato,polnt;3, v1sible
es, bright spots~ arA
evidontly eonvaponding tc edqvs vdth a hi-71
potential gmdient; the
over-aLl. exponwAvial iv)-c-tioa ba-Uman ie aad E
holds also for indi-
vidual ano-G. From the diam. D of tho spots: Ube
tmgant ,-ln2. cw,-
PonaLt Vo- of tho initle2 enaza of ths eleetrons,
can bs dotd. by
,rxaUa,wd

(contirraod)
the temp., i=el,,r Rj, - R9 = c(JR _ j2) (Viaeri 0 11- a temp.
c.~.osa to
A
,he Curio point) , , hAs type oflral'Nion ciho,,31d hold for aU
ferm.-
Mgn3tics for rhich tho alec. cond. at tomps. clooe to the GiTia
point depends on thfl spowltwaoug magnetUction.
11. Tion
Immediate isom-ce oV.pplng

VnUAr. A
32452. Grabarev, .L. IPrimenonlys - oby. a,teltrykh .tekhnologicheskiA
pravil na
a;
zhilstroitellstva promutroy-Stroit. prom-st'. 1949, No. 10. s. 9-12.
trista-Dneppy~k
SO: Latopis' Zhurnall nykh Statey Vol. 44
3' ?'012. rerroma---nitrCe svoYstva splavov i dnj.'n--'y poryadolk ston-lov
Konforentsi-J. no azil-
aa---rutri7 dl
%e m -avle.TiLy. Sver ov Ic d k. 1947G.)
Trudy in-Tia fizini acit-ollov, TiT. 12, 191,,"), S. 50- 1-Diblio-2: '13
Tia-,v.
150: Lotopist 1"Llulmalln,-1-1 bLaLcy, Vol. lt), ~Iookva, 19119

KCMO A.P.. professor. redaktor,
7IWelcs of the Ionosphere and the propagation of radlowaves (tranautions
and surveys of foreign periodical literature]. Probl.sovrdiz. 6 no.4:
3-212 1540 Omm 7:6)
1. DaystvitelInyy chlen Akademii nauk USSR.
(Ionosphere),(Hadlo waves)

U" , 11/1 -- ~1-.- . ;- c :3
Card 1/1 rnub- 43 - 11115
Komar.. A. P. and Klyushin, V. V.
Title t Dependence of the electrical resiatance of ferrites upon
ter-perature
Periodical t Iz
,V. SSSR. Ser. f.".z. 18,/3,, 400-402, -hY-Jun 1954
Abetract I Exreriiients viere conducted to detcraijie tl,p
doper-lence of the electrical
re;is~ance of Ferro*
'-tes urcn temn~r,.*.*are -at 1~ia )f ferromagnetic
c-,Dnversion. Data regarding this dependence -w-7 be u3p-fu-l in
estimating
U::,q ty-pe of ferromagnetic conversions and In deter-ALnLini-, the
nechan-ism of
Or-iginatior, of spontaneous magnetiza %,ion in ferrites. Yhe
noticeable chan-
go in temperature gradient of the electrical resistance during
passii,~-
through the zone close to the Curie point indicates a change in the
condi-
tion favorable for the appearance of canduct.'-7---y cl,-ctr~ns as
well as in
41.ie c-)nc!i';c)ns ' vorable for t'-,.4 r )~jf e. Five references:
La
4 French a-nd 1 LOSR 111950-1952). Graptio.
1-iotitution kcaderv of Sciences USSR, FIW3ico-Tec--nical L-istitutue
Submitted May 3j. 1954

Card 1/1 43 - 12/1.15
Au t- or s I Komar, A. P., and K71yushin, V. V.
UtIc t The Goidha-nei-rhc=cn eifecL iji -,'Urviucs
--_-w - -nw
rUX2. $ ~ . W11; - ~ . I
-.----1bdtract Va~ Qq
--R ------- 0-4 ea was, St
GS
whether the r-e is: a'n--y- 'c- o-- nne* ction lbative-en tho- anange'
in electri -paresis -tance
in tnt- nkignptic field and magnetization. It -aaas 11ound that t-:,.e
longitudinal
from the seccnd Law o" U-CLIOV~ 3 ~C;-rltC3 !L; C-~-
i--]-n Lnc;! 'b-, the insigdfic-ant rjle of t.~-.e --nd lb-7 the
volu7ctr~c
e nd Z,:It on. ~-I-yo
--c lencec
1-; u b-a -tIe May 3, 19 54

--Mvp5tiptior af thz lomp'n'ture drp~W,-,
ot)rpt-
FI
),er rjz
W 1! 2 i3g 1, 1956) An a-,-trav, v
Vm ta."m. tivi gI)t-t ly'al., -.L" t., lo.
.he ~-trph? -,vm Atweajvd al. 13,
k,mom-mm~ in 6 hr SnlurAf;-,

al, in a g1 L r 1, 1 Z;z01
hi, trndicLs thr k1w, ~f
C.11
it k, !t-w pfk~, !I

o" A.,,q,

p.
Card
Authors : Komar, A. P., and Selitskiy,
Title : Experim,--nts with an Ion projector
Periodical
Abr3tract
Dok]. AN SISR, 96, FA. 5, 957 - 95P, Junt- IQ',4
it was qugFested that a protcn Oor) u.1c! for stui-ring
.t monocrystals
:hinges in the. surf:,-e; ,' ~,: " , -~- w-,' -
iector, !,',C ',I '~M "~e' 7T3-- '
of an electron m-,-N I r cx-wer of the
ii mlich highmr. 1-ilk-~ wi- ~' -rctor P-nd
7ef'CF1?7.-e3. FhOtO,9.
ron nro.imctorg ar- i~iv~m
of Sc. U-33R. '.eninFrad

V_rr
KOKAR, A.P.; RZYNOV, N.Ke;.AH1ATL-, S.S.
Investigation of photomagnetoeldctric effect In cuprous oxide at
low temperatures. I.sv,AN SGSR,Ger.fIz* 19 no.4:444-446 ii-~Ag
'55- Wa 9: 1)
1*71siko-tekhnicheekly institut, Akadenii nauk SSSR.
(Copper oxide--Xlectric properties) (Photoolectricity) (Low ten-
perature research)

-7
GR1BOVA, M.P., takhnicheakly redaktor; TAPPA, Tu.A., redaktor;
KQM,A.Pe.
otvetstvennyy redaktor, professor; POPOV, R.Yu, redaktore
Classification of elementary particles ("translations and surveys
of foreign periodical literiiurel-Problemy soyramennoi fitiki 8
no-11--l-173 1560* (MLRA 10:1)
(Particles. Alementary)

E
i
Ith

an
ma" w
xper

51

I
d

t-a
r
a
b
d
e
k
i
s
r
Q

v
u
,,
at
1
n SlAm f
y

nd ph-,-- phb
?"

Im lh~ w P-I!, rws
ra*u frc wt iQmUta
1 M
-
l "kjll: -tit by On
d
b
*
N
V

rc
cv
c
,
I
S, 10
1
fvw. is C

Thig Kvrj Ir ox- o.,
jmd ( 112-

Cato fopnlgu~'a ap-." I)!
In,
-, WFP_-r~all
4iul, ~wJ ;i r~.41,vl.,r ti~, u-* A o- -z-
A ciy-o 3jr ;i
p forli!CJ 1"~ -I JAI ~!' I
ky i; ~ A-m . .....
'llo
.P,j
''oz a

6UBJUT Ub"a / ffly6ici I M 1611
4UI~R' KOMM A.1. iuuti~' I.e.
TITLL The Photoprotons from A:"
&RIODICAL Zurn.eksp.i teor.fis, 31, fasc-3, 531 - 531 (1956)
issued: 12 / 1956
The angular distribution of the photoprotons~'from A:*L~ wnich was
irradiated with the
y-bundle of a synchroton with the maximum energy of go MeV, was
investigated. The
photoprotons with an energy of from 2 to 10 MeV were registered by
means of a
WIL60N chamber which was filled at a pressure of 1A atm with argon
and with the
vapors of a mixture of ethyl alcohol and water. The 'Nilson
chamber, which has a dia-
meter of 30 em and a dePth Of 7 cm, works in a cycle with
overpressure with a period
of from 10 to 15 see. The argon contained by the Wilson chamber was
irradiated with
a collimated y-bundle of 1,8 am diameter, which incides into the
chamber trough an
aluminium window (100A.L) in its lateeal wall. The proton traces
formed as a result
of the reaction (y,p) were photographed stereoscopically.
302 traces were dealt with Angles were measured by the
reprojection. method and with
an accuracy of from 1 to 2 The histogram contained in -the attached
drawing was drawn
by joining the traces with intervals of 20Q. Directivity in a
forward direction with
a maximum at the angle of 70c' is distinctly discernible. The
course taken by the curve
obtained here.for the angular distribution of the photoprotons from
argon agrees
sufficiently well with the course of angular distribution obtained
by B.M. billchRp
Phys-Rev., 100, 791 (1955) by the method of nuc-lear emulsions and
with a maximum
energy of tFe7y-bundle of 22,5 MeV.

I'mi-
act 1

"'? 'e - "~5f
=i~i70V, YC.B., CHIMOV,
VOIKOV, Yu.M., and YAVOR.,
j A!. ) KUL'CHNSKIY, L.A.
V P. I TLIAR
I:P.
"PhotodisintegratiOn Of Nuclei by Gamma-Radiation from Leningrad
Synchrotron at 60-90 Mev."
Physics Inst. im Lebedev, Acad. Sci. USSR
paper submitted at the A-U Conf. on Nuclear Reactions in Madium
and Low Energy
Physics, Moscow, 19-27 Nov 57.

6t om

AUTHORS: Komar, A.F. and Shrednik, V. N. 126-5-3-11/31
P=formation of Zirconium as Observedby Means of
TITLE: M ~F! ~
~Mectronic Projector (Prevrashcheniya a7t P tsirkoniya
po nablyudeniyam. s pomoshchlyu elektronnogo proyektora)
PERIODICAL: Fizika Metallov i Metallovedeniye, 1957, Vol V, Nr 3,
pp 452-464 + 1 plate (USSR) - ,
ABSTRACT: The aim of the work described in this paper, which was
started before the publication of the paper by E.G.Brock
(Phys. Rev., 1955, Vol 100, p 1619), was to evaluate the
potentialities of the electron projector method for
studying phase transformations; to verify by means of
this method the crystallographic relations between the
lattices of m and 0 zirconium obtained by Burgers by
means of the X-ray method on macroscopic specimens; to
elucidate the role of -the size and shape of the crystal
on the type of mutual orientation of the lattices of the
a and P phases. The authors took into consideration
the fact that study of zirconium by means of an electron
projector is of great interest also from the experimenta-
tion point of view, Muller (Ref.6). So far no regular
pictures of auto-electron emission of zirconi-am has been
Card 1/6 obtained proving symmetry of the crystal. Even in the

126-5-3-11/31
(x;tp Transformation of Zirconium as Observed by Means of an
Electronic Projector
best vacuum only irregular spots of auto-electron emission
are obtained which are due apparently to various
contaminations of the crystal surface. In their e-xDeri-
ments, the authors used an ordinary electron projeAor
as described by Muller (Ref.6). The anode consisted of
a layer of "conducting glass" (Ref.8) on the inside of a
spherioal glass flask, bhe surface of which was coated
by villemite. The work was carried out v,.,ith projectors
which were continuously evacuated as viell as sealed
projectors containinS tantalum getters. The 4�0
Dhase transformation is investigated for zirconium single
crystals of sizes of the order of one micron. By using
the electron projector method it is possible to observe
visually the transforming crystal at a magnification of
100 000 times. Emission Dictures were obtained of crystals
zirconium)
as viell as the hexagonal
of the cubic (P
(cc zirconium) symmetry. The results confirmed the
relations published by Burgers, W.G.,(Physica, 1934, Vol 7t
P 5611 Usually durir4r, transformation only one of the
Card 2/6 possible orientations of-the new phase relative to the

126-5-3-.11/31
a~�p Transformation of Zirconium as Observed btv.- Means -of., an
Electronic Projector
initial phase manifests itself, which is attributed to
the considerable role of the surface energy in the case
of crystals of small dimensions. Signs of dislocation
have been detected in zirconium crystals, which are
attributed to a diffusionless mechanism of transformation.
The method of identification and of indication of the
emission pictures of the faces of the zirconium crystal
is explained in para.3. Since in the first approximation
the shapp of the end of the projector point can be
assumed as being semi-spherical and since the dimensions
of the radius of the point are considerably smaller than
the radius of the sphere of the projector, the electric
field betveen the point and the sphere of the projector
can,in the given approximatioutbe considered as the field
of a spherical condenser in which the electrons will move
along radii of the projector sphere. On hitting the
villemite screen, the electrons will produce light on the
screen and will produce on the sphere of the projector
an orthogonal projection of the faces and'edges of the
crystal. On this projection it is easy to designate the
Card 3/6centres of the faces which can be considered as being

126-5--3-11/31
M;gp Transformation of Zirconium as Observed by Means of an
Electronic Projector
spherical projections of the nomals to the edges.
Obviously, this spherical projection of the normals can
easily be inter-related with the gnomo-stereographic
projection of the crystal which also enables deciphering
the aato-emission picture, which is described. The
results of the experiments are described in para.4,vthich
deals with the,structu're of the face surface and auto-
emission as well as with the picture of auto-emission and
of tran formation of zirconium. The results are
evaluEted in para.5. The following conclusions are
arrived at:
1. By means of the electron projector it is possible to
determine from the -nature, bf the facep, of a, arystal pointthe
mutual orientation of the lattices of the individual
phases ' during- .' polymorphous transformations. Fo.- the
case of zirconium, the mutual orientation of the lattices
of the m and the- 0 phases, earlier determined by
Burgers by means of the Xt-ray method, was confirmed.
Card, *6 2. The polymorphous transformation of zirconium in the
4/ case of crystals with linear dimensions of the order of a

126-5-3-11/31
a;tp Transformation of Zirconium as Observed by Means of an
Electronic Projector
micron takes place according to the non-diffusional
method throughout the entire volume of the crystals.
3. The non-equilibrium pseudo-morphous crystal of the
accompanying phase becomes transformed into the
equilibrium state in the case of high surface mobility
of the atoms so that the *faces with low indices of the
basic and the accompanying crystals remain strictly or
approximately parallel.
4. In the case of the studied zirconium crystals with
linear dimensions of about 11i, those possible orientations
become materialised during transformations which,involve
a minimum change of the surface energy.
5. The temperature of the polymorphous transformation of
the zirconium depends strongly on the quantity of the
nitrogen and oxygen absorbed by the zirconium,inereasing
with increasing concentration.
6. The observed faces of the zirconium crystals with cubic
symmetry are not equilibrium faces of pure zirconium but
equilibrium faces of crystals of the solid solution of
Card 5/6 nitrogen 10 Rev 1 + 28in + 0.25cos 0 holds a The major part of the
re-
actions (1,P) on nitrogen is caused by a direct resonance
process*
All 12-Mev protons stem from the P3/2-1,d 5/2 transitions.
Figure I
Card 2/3 shows the energy spectrum of the protons emitted in
the reaction

Photodisintegration of N14 Nuclei S/020/60~f31702/018/071
B013/B011
(amp). The maximum of the proton-energy spectrum is found at
proton
e-hergies of 4 1-5 Rev. The neutrons are probably emitted with
greater energies as compared with the protons. These and other re-
sults can be explained by the assumption that in most cases
(-e213)
the reaction (-
enp) proceeds as followas A neutron is first emitted
with relatively gTfat energies, and thereupon a proton from the
excited nucleus V-1. On the strength of data found here it is
possible to estimate the contribution of the protons that depend
on the "quasi-deuteron" mechanism of the interaction of-r-quanta
with the nitrogen nuclei, and also the yield of protons with
energies of more than 16 Hev can thus be estimated. This
contribution
is of the order of *v 1%. Further data concerning other photodis-
integrations of nitrogen are being worked out. There are 2
figures,
1 table, and 12 references, 3 of which are Soviet.
ASSOCIATIONt Fiziko-tekhnicheskiy institut Akademii nauk SSSR
(Lnstitute of
Physics and Technology of the Loademy of Sciences of the USSR)
SUBMITTEDt December 16~ 1959
Card 3/3

3/02 60/133/04/12/031
B019YI3060
AUTHORS: Komar A. P., Academician Of the AS UkrSSR, Makhnovski-y.
Yeg Do. FoNaubnov, V. P.
TITLE: The Relative Yield and the Energy Distribution of Photo-
delitax From Copper
PERIODICAL: Dokla4y Akademii nauk SSSR9 19607 Vol. 133, No. 4v
pp. 797-799
TEXT: The authors measured the ratio between the photodeuteron yield
and
the photoproton yield from copper and the energy distribution of these
partioles.at the maximum energy of the bremespectrum, of the 70 Mev
gamma
radiation. Basing on Fig. 1, the authors discuss details of the
experimen-
tal setup. A special pulse method was developed for the
identification of
the particles, and formulas (1) and (2) are given for the calculation
of
the radius of curvature of the particle path in the magnetic field
119500 oe toward the emulsion. The authors worked with an HMK~M-,q2
NIKFI-Y42~ 400 A thick nuclear emulsion. Fig. 2 shows the radii of
~
curvature as a function of the particle ranges in the emulsion and the
Card 1/2

The Relative Yield and the Energy Distribution
9/020/60/133/04/12/031
of Photodeuterons From Copper B019/BO60
"error zone". The enerey distribution of the identified protons
that wa
obtained, is in good agreement with the results obtained by
other autho;ss.
Fig- 3 shove the energy distribution of photodouterons. In
agreement with
Byerly and Stephens (Ref. 1) the conclusion is drawn that the
maximum of
the energy distribution is below 4 Hev..The ratio of the
deuteron yield
with energies of 4 - 10 Hev and the proton yield of the same
energy is fmrd
to be 0,07 + 0-04,- In the energy range of 3 - 10 Mev it is
found to be
0-086 � 0-9475. There are 3 figures and 3 non-Soviet references.
ASSOCIATION:
SUBMITTED%
Fiziko-tekhnichaskiy inatitut Akademii nauk SSSR
(Physicotechnical Institute of the Academy of Sciences, USSR)
May 39 1960
Card 2/2

S/02 60/135/001/013/030
B006YB056
AUTHORS: Zomar. A. P, Academician of the AS UkrSSR and
Makhnovskiy, Ye._D.
TITLE: The Fine Structure of thg_Energy Spectrum of Photoprotong
and the Levels of the Li Nucleus
PERIODICAL: Doklady Akademii nauk SSSR, 1960, Vol- 135, No. 1,
PP. 52-54
TEXT: Following an earlier paper (Ref. 1), the aut ors report on
measure-
ments of the energy distribution of protons from Li~ irradiated
with
gamma rays of the bremsstrahlung spectrum with E ymax = 28 Mev.
The target,.
enriched in Li6 to 90% was 8.6 mg/CM 2 thick. The protons were
recorded
by means of H W K!FW -22 (NIKFI LL!nuclear emulsions (400 P); the
plates were orientated at an angle of 6o0 to th .e proton beam
axis. Measure-
ments were made on all tracks with a length of >,,4 9, which
began on the
emulsion surface and satisfied the geometrical criteria.
The,glates were
evaluated in 1350-fold enlargement. The background, due to L
(y,d)jje4

The Fine StructtLre of the Energy Spectrum of S/020/60/135/001/013/030
Phgtoprotons and the Levels of the BOo6/BO56
Li -Nucleus
--reactions, wRP about 1% less than 10% of the measured tracks due to
otodisinte_oa~tiona- of the LIT
h Admixturee-The background due to the- ap-
p
paratus (scattered radiation) was < 3%- The proton spectrum measured is
shown in Pig. 1. The proton energy (Mev) was measured in the labora~(
system. According to Refs. 2-4, the reactions (y,n) and (y,q) on Li de-
veloped under formation of the non-stable nuclei Li5 and HeO especially
in.the ground state. The question Is now discussed what E p-peaks in
the
decay of these nuclei may occur in a+p, also in the case of the
formation
of Li5 and He5 in excited states. The following E p-peaks were
measured:
4.19 4.59 5.5, and 11.6 Mev; determined levels: 11.2 and 18.3 Mev; pro-
posed levels: 9-5 and 10.0 Mev. (According to Ref- 5 there exists a
level
with 9.3+0.2 Mev and according to a paper by Ye. A. Al 'bitskaya et
al. one
at 10 Mev). There are 1 figure, I table, and 5 references: 2 Soviet$ 2
US,
and 1 British.
ASSOCIATION: Fiziko-takhnicheakiy institut Akademii nauk SSSR
(Institute
SUBMITTED: July 13, 1960

232 2141g/089/61/011/006/009/01.4
Kinetic energy of Th B102/BI38
The contour diagram for the fragment energy distribution shows
that
asymmetr as well as symmetric fragmentations occur, and that the
mass
ratio m,~mc; diminishes as the mass of the disintegrating nucleus
in-
e 232 238 '252
creases. For Th , U and Cf , m2/mI is 1-56, 1.36, and 1.31, re-
spectively. The figure 1-56 was determined from the fragment mass
distri-
bution. From the total energy distribution it can be seen that
the most
probable total energy E = E 1 + E2 is lower and the half-width of
the peak
(45 Mev) higher, than the respective values for U 238
photofission. The
following numerical values for most probable fragment energy
(Mev) were
determineds
Heavy fragmentsi 52 + 2 + 6.8 - 61 + 2
Light fragments: 89 + 2 + 5.6 - 97 * 2
heavy + light f.: 143 + 2 + 12 . 157 t 3
The authors thank the proton-synchrotron team of the PTI AN SSSR,
and
G. N. Nikolayev and K. Shvets for assistance. There are 4 figures,
I table, and 4 references: 2 Soviet and 2 non-Soviet. The two
references
to English-language publications read as follows: D. Hiller, D.
Uartin.
Phys. Rev., 90, 581 (1953); R. Jensen, A. Fairhall. Phys. Rev.,
109, 942
(1958)
Card 24-z_

VOLKOV,, Yu.M,; KOMAR, A.P.; KO-ROI-EV$ G.A.; KOCHAROV., G.Ys*
Application of an ionization &:~epectrcmeter with a Uide ana-
lyzer for half-life aeterminations. Izv. AN SSSR. Ser.jfiss.
25 nog:n88-3.196 161. (MIRA 24:8)
11, Fu#o-te#=iChesjdy i hatitut im. A.F. Ioffe AN SSA.
(spectrometry)
(Radinactive substaces-Decay)
A-I

S/057/61/031/001/016/017
'.24-2 B104/B204
AUTEORS: Komar, A. P., Mikheyev, G. P., and Chernov, N. N.
TITLE: A System for the'extremum control of the intensity of
gamma radiation of a synchrotron
PERIODICAL* Zhurnal tekhnioheekoy fiziki, v. 31, no. 19 1961, 109-115
TEXT: The authors describe an extremum control system which had been
constructed'for the synchrotron of the institute mentioned under
Association
and which controls simultaneously two parameters which, essentially, -
determine the stability of the intensity of gamma radiation. In the
first
part of'this papers an extremum controller with one input parameter is
studied. The so-called step-modulation of the input parameter is
mentioned
as the m6st favorable control method. The injection time T is
considered
to be the input parameter. This injection time changes with a canstant
frequency and the amplitude 6T. Thus, the initial.quantity, i.e., the
intensity of gamma radiation assumesthe ialues V according to the
injection time T, and I" according to the injection time T + 6T. The
sign of the difference (I" - II) if; - determined from these values.
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A system for the extramum control... S/057/61/031/001/016/017
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if (it, I 1 00 the operating- point-. is,~ to--the -left of Ahe ex
remum an
t
~Thua kzign(V:~
if At i
-w are, 6-f b- I anIdIf are-the'mean
h -"-T'I:d he,AU-ciament' t on tide
values'of the i,n.te-nsiiies corresponding to the injection times T
and
T -~ M For impx~oving the quick response, the authors, in the scheme-
deve146d by them, used not only the sign of (I" - If) according to
(1),
but also the amount of this difference according to the relation
T -1 ff".- YI) (2), where k is the negative feedback factor. In order
k
that the quantity b(AT) be as small as possible, a high amplification
factor is~necessary for the feedback. A scheme based on this
principle
is shown in Fig. I as a block diagram, whereas in Fig. 2 it is shown
as
a eircuit diagram. A parpmfter which Just as important for a
synchrotron,
is the instant T hf where ihe high-frequency voltage is connected to
the
resonator-of the synchrotron...It is shown that for normal operation
of
aIsystem of several extrsu= -controllers the demand that the
extremum.
controllers do not act upon one another need not necessarily be
fulfilled.-
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A'%system f or.. the extremum cont3~oi
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-Thi a dam6nd may be satisfidd If the extremum 'controllers operate
~lter-
natively. In this wayt however, a reduction of the'quick resp6nse is
caused, 'a~d the '4uestiow is examined',how tar an incomplete
de6oupling.
of-the two extr6mut controllers i6 permis6ible. For thi6 purposer it is
suffici,~nt to. modulate the. two'ilaput parameters 'by means of
another j
frequency. :~ Fig. - 3-.shows e.-system ot tiio ex'tremuq,_p
.ontro-Ilers whiah
operate according.to.this principle. Blocks (1) and (2) correspond to
blocks (1) aftd7* (2) in Fig. 1, the dashed blocks correspond to.the
dashed
block.in Fig. 1. By means.,of thin extremum controller, T ana.T hf, are
Controlled, and the good results obtained from this controller.are disc
cussed.' ' Scientif ic collaborator A. V...Kulikov is thanked
for-interest
5 So et-bloc references.
and advice. There are 4 figures and vi
ASSOCIATION: Fiziko-tekhnicheskiy institut AN SSSR Leningrad
(Institute of 'Physics and",Technology AS USSRi~;Leningrad)
SUBMITTED: June 15, 1960
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