SCIENTIFIC ABSTRACT ABROSIMOV, V.V. - ABRUKINA, R. Y.

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Nuclear Energy and tho Navy (Goat.) SOV/6261 5. k,__R_j-ojoy Ziginoor Commander (Navy). Primary Penetrating Radiation 58 ,ndr2vL Engineer Lieutenant Colonel, and Q,_NqAtay, 6. A, A Majo:7 Engineer. The "Foot Wave" and Its Damaging Eff .,,act 66 7. 1. Frolov. Ionizing Contamination 70 8. P a4)Captain (Navy), and 0 L-Jaier Bhginoer cot Protecting a Ship AAga st Nuclear Weapons T8 9. G. FIigirenl1co, Captain (Navy), Professor, Doctor of Engineer- ing. rroteorxng~a Ship Against E:xplosions 86 10. P. Abolishin Captain (Navy). Means of Protection Against , Nue:1ear weapons in Foreign Navies .93 11. P, 1[hq,%hlny, Engineer Captain (Navy), Candidate of Tech- nimil Sciences. Nuclear Protection of Light-Class Ships 100 Card - r1 KOLESANOVp P.F.; KOJIAREVA, A.S.; Prinimali uchastip,: ABROSIMOV, V.V., inzh.; GAIRINp E.G., inzh,; SUYETINA, G.F., laborantjf~ ~GV, B.I.p lalwant; PANOV, O.V., laborant, Pelletizing Ufaley deposit nickel ores with subsequent roasting. [Sbor. true.) Nauch.-issl..Lnst.met. no.4:54-6,1 161.. (MIRA 15:11) (Ufaley Range-Nickel ores) (ore dressing) SHCHMMOV,, V.A.; kIMIMOVI_Yf~.V.; STULIPIN,, Ye.A.; GOROKHOV, I.S. Mechanism 6f slag formation during the melting period in high capacity open-hearth furna-cese Izvev7soucheMave; chern*mets 5 no.11:48-56 162. (MIRA 15:12) 1. Hoskovskiy institut stali i splavov, (Open-hearth process) (slag) ABROSKIN, G.I., inzh.; KUDASHO~, A.V., inzh.; POTAFENIKO, B.T., inzli. Construction of the Golovnoy hydroelectric development on -the Vakhsh River. Gidr. stroi. 32 no.8:7-10 Ag 162. (MIRA 15:9) (Golovnaya Hydroelectric Power Station) / 4 1-" ;-. V . fl . I- , 2~ 11 1 . I II I ABAOVP N.A. (Hoskva) ;' Curriculum of elementary mathematics in podagcgical institutes. Mt. v shkole no,Z-.17-20 Mr-Ap 158. (MIRA 11:2) (Mathematics-Study and teaching) ABROYAN, I.A. 4 Emission from an oxide cathode bombarded bv positive ions. F12. tver.tela 1 no.12:1854-1856 D '59. (MIRA 13:5) 1. PolitekhnichesHy in-stitut im. M.I.Kalinina, Leningrad. (Cathodes) .Z1 ~- a2O 14 A)THOR: TITLE: 2 9 7 55' S/19li/61/000/006/030/077 D201/D302 ,%broyan, I.A. The effect of ion bombardment on emission of an oxide coated cathode PERIODICAL: Referativnyy z1hurnal. Avtamatika i radioQ1ektro-ilika, no. 6. 1961, 2, abstract 6 G16 (Nauchno teldin. in- form. byul. Leningr. politelvdin. iTi-t, 1960, no. 3, 33-45) TEXT: The effect of positive 1-iydrc(-,cii and potassium ions on the emission of oxide coated cathodes was studied. The invgr, t igati oils were carried out at the rcsidual gas pressures < 1.10- min lig., a device consisting of an ion source 600 maun. analyzer aild a measuring section. Hydrogen was let in through a palladiiiin capil- lary. The energy of hydrogen io-as was 10 - 70 keV, Potassium ions were obtained by calcination of a mixture of potassium carbonate with aluminum and silicon o.-ddes. An intensitvc surface ioniza- Card 1/2 2)7515 S/191V61/000/006/030/077 The effect of ion bombardment... D201/D302 tion of potassium thus occurred due to chemical reaction at temp- eratures 900 - 10000C. The energy of potassium ions in the ex-peri- ment was I - 10 keV. The ion current falling on the oxi.(Ic coated cathode was 10-8 - 10-7 amp. The aiming, of the ion boxi at the oxide coated cathode caused an increase in the clectron current from th,! cathode in all cases. Every bombarding ion releases 2FOOO - 5,000 additional electrons. The ratic of the variation of the cathode emission current to the ion current causingr this varia- tion depends on the emitter temperature, the cuergy of bomoarclin,T ions, the intensity of the beni-ii and also on the miaguiti-i(Ic of elec- tric field at the cathode surface. 7 rcfcrenccs. Abstracter's note: Complete translation-7 Card 2/2 ABROYAN, I.A.; MOVNIN, S.M. Emission of an oxide cathode bombarded by charged particles. Fiz. .L L,vr. tela 3 no.2:567-574 F 161~ (MIRA 14:6) 1. Leningradskiy politekhnicheskiy institut im. M. 1. Kalinina, Leningrad. (Secondary electron emission) 3 / 20 e'~Kd AUTHOV " 9 11"~Oj //3F, 11q3) S/1 6-1 ~601'_)003/002/037/050 B1 02/B2011 Ab~yanj TITLE: Electron emission from germanium induced by cesium- , potassiurry lit'Aium-, and hydrogen ions PERIODICAL: Fizika tverdogo tela, v. 3, no.. 2.. 1961, 588-594 TEXT: The ion-induced electron emission from dielectrics and semiconductors has heretofore not been systematically studied; on the other hand, this study is necessary in order to get an insight into the mechanism and under- lying rules. Studies in this respect were ti.,erefore conducted on r.-type germanium single crystals (resistivity 37 ohla-cm), and results are described Jn the present paper. The disk-shaped Ge crystals (6-7 mm in diameter) were ground, etched with CP-4 (9R-4), and washed in distilled waters Subse- ontly, they ivere introduced (M) into the oxperimental setup (Fig, 1)~ The apparatus had a residual gas pressure of not over 5''0-8 mm 119; ovacuation took place with a mercury diffusion pump, The positive ions were emitted from the hot source (0) which was coated with a paste made of Al 203 + Sio2 Card 1 /~ 20139 S/18 61/003/002/037/050 Electron emission from B102YB201, I alkali carbonate. The ion beam was focused by a s,,stem of Ni electrodes (41 9-42) , monitored, and caused to hit the target (M) w1nich was arrangee in the center of two collector semispheres (50 ,nm in diameter) The target temperature ranged between 700 and 8000C during the (static) measurements, and the primary ion beam had an ampera(~e of 5,10-6 a The e'lectron-emission coefficient y was measured as a function of the ion energy; the results tire illustrated by Fig. 2. y grows linearly with E for Cs, K, and Li; the in- clination of the y straight lines is the same as in the bombardment of metals; for all alkali ions there is a threshold energy (1000 ev for Cs, about 500 ev for K and Li), above which the kine t4C ejecting of ions be- comes considerable. Mass-spectroscopic studies showed that the ion beams used were by 98~o ions of the same type, The curve obtained for IU -, ions (at 5000C target temperature) shows that field-induced electron er':ission from germanium takes place with `;ydrogen bcmbardment, ), shows no dependence on the target temperature (in the range investit;ated). but ),(E) exhibits a shift to the left, if the tarE~et is exposed to heat treatment Drior to the bombardment. The maximum energy of secondary, elec:r=s Js al--ut 20 ev, and the volt-ampere characteristics reveal that sa-uration is noi-~;omyletely Card 2/y ;~U-'-35; S/181/61/0.03/002/037/050 Electron emission from ... B102/B201 ato,m to txcite an electron to an enczG~r sufficient to permit its eaca,pe into the vacuum, n is the number of collisions per ,iniL length, and a is a pro,,porticnalit~ factor takine the primary electron distribution into accouqt G. G. illina, G. 1,,r. Batanov, and A. G. Llorozov are thanked for their cooperation. There are 3 fiCures, I table, anc~ 1'r references: 10 Soviet- bloc and 3 non-Soviet-bloc. ASSOCIATION: Politekhnicheskiy institut im. "I. I. Kalinina G. Leningrad (Pol,ytechric institute imeni T. Kalinin, Lonincrand) SUB:-,,1ITTED: Jcne 24, 1960 Card 20135 C/131,20 ~'PW3 1 S/'181/61/'003/002/033/0'zO B102/B201 AUTHORS: Abroyan, I. A. and :,11ovnin, S. TITLE: Emission of an oxide cathode bombard:!d by charged particles PERIODICAL: Fizika tverdogo tela, v. 3, no. 2, 1961, 567-574 TEXT: Abroyan has shown in two previous papers that a beam of potassium or hydrogen ions incident upon the surface of an emitting oxide cathode gives rise to an increase of the anode current, with A = 6 Ia/I 1 attaining up to 5000 electrons per ion ( 61 a, change of electron current of the cathode, I,, intensity of ion current at the cathode). Further studies have been made of the effect of different positive ions upon the thermionic emission and the mechanisms of the change of the thermionic cathode current. The measurements were made on an apparatus described earlier at 1-2.10-7 mm Hg. The primary pulse currents had a duration of 10-200 psec and a frequency of 2-2000 cps. The primary and the secondary pulse currents were recorded by a linear amplifier with resistors Card 1 S/181/61/003/002/033/050 Emission of an oxide cathode ... B102/B201 ensuring the conservation of the pulse shape. The pulse heights were measured with an C~4-1 (SI-1) or 25-W(25-I) synchroscope, Oxide cathodes with coatings of (Ba,Sr)O and (Ba,SroCa)O were utilized, and the effects of ion bombardment were found to be "'airly equal for both types. The typical dependence of L\ on the energy of bombarding ions is repreqented in Pig. 1 for 6.5 v at the hot cathode, and an anode current of 1.2 ma; (for eieotrons (I), hydrogen j,ons (2), helium ions (3), and argon ions W, as well as. in the case of U. ath ~ 5.5 v and Ia= 1.4 ma, potassium ions (5)), Experiments with K; were, however, conducted with another cathode, so that the results are not comparable. The monotonic decrease of L~ kfrom 2.5 to 10) observed in electron bombardments of the cathode fits ob!;ervations made by Pomerantz. L\ as a function of the plate voltage Ua first exhibits an exponential rise -ap to about 60 v, and, with a further increase of Ua the rise is slow and practically linear (on a bc-mtardment by 2.rj-kev potassium ions, voltage of filament battery U 5.25 v), I (U ) exhibits a similar Wh a a) Card 2/45- 20135 S/184 '61'003100210331050 Emission of an oxide cathode B102~0011 course, a property which is conserved also on a bombardment with electrons or other ions. a as a function of the voltage of filament battery goes through a maximum at U I =, 6 v, has a very low value at 4 and 8 v, and cath at 9 v, Z3 ~~-O. The electron current additionally emitted by the cathode rises and drope with time after an exponential law (1-e- t/v , e- t/rI respectively). Por hydrogen and helium ions, Z c- 20 psec, for argon and potassium ions, -10 liseoo The results show that the change of the emission of an oxide cathode bombarded with positive ions cannot be explained by the slowing down of ions, The safest assumption seems to be that so-called "displacement defects" are formed in the surface layer of the oxide coating, i.e., defects caused by a displacement of ions from their positions of equilibrium in internodal positions~ This assumption is above all supported by theoretical considerations. The following formulas are obtained for the penetration depth 6 of ions of the energy E and the atomic number z 1: Card 3 /5 20135) S/181/61/003/002/033/050 Emission of an oxide cathode ... B102/B201 A t A A > A o.6 2 1 2 j.i"E cm 1 2 1z2 Al - d 0.7 z2/3 z213') 1/2 A2 E A 1< A 2; -772) z z A + A cm; 70--S~) V - 1 2 1 2 A 1is the mass of the bombarding ion, A2 the mass of' atarget atom of the , 3 atomic number z 2j d the density of matter in jig/cm,t.P, the scattering angle of the ion in the laboratcry system, ~ ~ T-nT:t,', ~E2 , the mean logarithmic decrement. At E kev, 1500 A was obtained for 1-,1+ 2t 750 A for He+, and 50 A for Ar+ and K4, The mechanism of the increase of thermionic emission of the oxide cathode bombarded with fast ions is governed by the following rules; 1) increase of ts with E, 2) independence of 2~ of the intensity of the ion beam, 3) the inertial change of the thermlionic current (the primary square pulses of Card 4/~- 20135 S/181/61/bO3/002/033/050 Emission of an oxide cathode B102/B201 -7 1-10 3.10 a gave ri-~e to secondary pulse j1ags with rising and dropping times of 15-30 psec), 4) the similarity of !~s and I as a functions of the electrode potential difference, 5) the existence of a peak of the Z~(T) curve, and,6) the ratio of the !~a values for different ions (L rises with the atomic number of the bombarding ions)- Professor D1. A. Yeremeyev is thanked for having supervised the 1%ork, and G. G. Il!ina for her measurements. Kozlyakovskaya is mentioned. There are 5 figures, 1 table, and 6 references: 4 Soviet-bloc and 2 non-Soviet- bloc. ASSOCIATION: Leningradskiy politekhnicheskiy institut im. M. I. Kalinina Leningrad (Leningrad Polytechnic Institute imeni 114. 1. Kalinin, Leningrad) SUBINUTTED: June 15, 1960 Card 5/5 AUTHORs Abroyan, I. A. S/181/62/004/010/011/063 BiOB/BI04 TITLEt Conductivity induced in germanium by bombardment with potassium ions PERIODICALt Fizika tyerdogo tela.t v. 4# no. lot 1962, 2719 - 2726 TEXTs The additional conductivity of n-type Ge i6duced by bombardment with a pulsed beam of potassium ions (100 - 10,000 ev) was studied with an arrangement similar to the usual.secondary-emission apparatus (FTTI 31 2, 588, 1961), comprising a spherical collector, an antidynatron grid, and the Ge target. The samples had previously been heated to about 8000C in vacuo. Bombarding the Ge targets gave rize to an ad,'..'tional conductivity pulse during each pulse of incident ions. The rise ind fall of these con- ductivity pulses (due to excitation of electron-holc pairs, defects) is exponential. The additional conductivity increases with increasing energy of the incident ions. However, there in a threshold energy of 300 - 400 ev below which no additional conductivity is excited. The number of electron- hole pairs excited by one incident ion is a monotonic function of the ion energy E, amounting to about 900 - 1000 pairs at E - 10 kev. The fraction Card 1/2 M Conductivity induced in... S/1'8 YB 62/004/010/011/063 B108 104 3 of excited electrons going into the vacuum is 2 - 2-5-10 throughout the energy range of 1 - 10 kev. The mean energy consumed in the excitation of one pair is shown in Fig- 5 as a function of E; (kev). There are 5 fig- ures* ASSOCIATIONs Politekhnicheskiy institut im. M. I.' Kalinina, Leni,l;;rad (Polytechnic Institute imeni M. 1. Kalinin, Leningill) SUBMITTEDj May 7# 1962 E Figo 5 40- 20- h3127 S/181/62/004/011/028/049 B125/B186 AUTHORS: Abroyan, I. A., and Lavrov, V. P. ------------------ TITLE: Secondary emission of dielectrics and semiconductors resulting '11rom potassium ion bombardment PERIODICAL: Fizika tverdogo tela, v. 4, no. 11, 1962, 3254-3259 TEXT: Ion induced electron and ion emission from LiF, NaF, NaCl, KBr, C8C1 and silicon monocrystals was investigated. The crystals were bombarded with potassium ions of 40-7000 ev using the pulse method of G. M. Batanov (FrT, z J, 2, 558, 1961; 3, 2, 642, 1961).A triple-electrode system was used com- prisir.E- a spherical Crid, an antidynatron I-rid and the target to be investiLated. The. pressure of the residual. gas* was 3-10-7 mm Hg. The K ion beam was square-pulse modulated with repetition frequencies of 0.5-50 cps, amplitudes of 0.2-0.8 i,a and a duration of 8 to 16 jLsec. Electron emission was obs.-rved only at energies of the K ions between 100 and 300 ev. The .coefficient w of the ion-induced electron emission was found to increase with growing ion energies, up to -12 kev sharply, and then slow.y. KBr crystals had the highest and LiF crystals had the lowest values z,!' f. The Card 1/3 3/181/162/004/011/028/049 Secondary emission of dielect,rics... B120186 coefficients K of ion-induc6d ion emission of all alkali-halides were similar and similar,y dependent on the energy of primary ions. The coefficients K became largerwith increasing energies (starting with threshold energies of AOD-500 ev) of the primary ions and reached saturation values of 15~~ at E-1.5 kev at'most. The positive secondary particles consisted of knocked-out particles of the bombarded crystal and reflected ions of the primary beam. On increasinE the temperature from room tempera- ture to ANO-4000C, K+ and-K- remain practically unchanged. The decrease of j is attributed to the scattering of excited electrons from phonons. The temperature dependence of ? and the shifts in the spectra of the secondary electrons may be qualitatively explained by the enerC~r looses of the excited electrons. The coefficient i of silicon monocr7;stals showed almost a linear increase with Erowing energies of the bombarding ions. This increase was less at elevated temperatures, i.e. when the specimens were heated from EVOO-13000C. The coefficients K+ o*f etched silicon monocrystal samples and of trose heated to 13000C showed a sharp increr.~n with growing energies of the primary particles up to - 1.7 kev followe(l -er and Card 2/3 .,. 112(.- S/02 62/144/003/011/030 B178YB104 AIJT'MS: Abroyan, I. A., and Zborovskiy, V. A. T ~-~'xcitation of electrons in germanium by potassium ions -HOD-CA"; Akademiya nauk SSSR. Doklady, v. 144, no. 3, 1962, 531-534 TIXT: A study was made of the chan-a in conductivity of n-type Germanium U s~n-le crystais bombarded with potassium ions of 400-10,000 ev energy, 0 which is due to the excitation of valence electrons. The slowin& down of these particles at a velocity v< v 0 (VO - 2.2-10 6 cm/sec) cai, -..- determined from an investiEation of the lonLgitudinal conductivity. A.1 -~Iectric field was created on the germanium plate onto which a potassium i--~ beam of 0-1-50 t,-- stren[;th, modulated by square pulses of 10-50,itE!;-, duration, was ocused. "Non-equi"'ibrium, carriers produced by 'he potassirm ions induce an additional measurable current. it is possible to record the variation of 16'-e conduction current. The time constant -5 of the pulses is 3-5-~-kSec if the specimen is not heated, and 10-20 ,,see if the target is vacuum-Ineated to SOJOC. The lower the rate of cooling, I the greater the mean lifetime, z , Card 1/3 S/020/62//144/0071/01 1/0.310 Excitation of electrons in germanium ... B178/B!04 of non-equilibrium carriers. The lower values of /I' area attributed 0 1 to the increase in concentration of thermal acceptors by rapid cooling w um carriers. ..hich reduces the lifetime and mobility of non-equilibri The current of the induced conductivity is a linear function of the field strength a. It is found that (_,ai /I+e)Kt where 0 1 1, and 0-5 kev, f(E). equals 0.135' 0.114, 0.071, and 0.032 for 6, 3, respectively. The relationship between the ionization cross section and elastic collisions with lattice atoms at v< v. can probably be obtained from a study of the conductivity of semiconductors ~nd dielectrics. A comparison between the coefficient of ion-electron emission and the number of excited electrons makes it possible to predict the production probability of secondary particles in vacuo. "here are 4 figuros. ASSOCIATION: Leningradskiy politekhnicheskiy institut, im. I. 1(alinina (Leningrad Polytechnic Institute imeni M,. I. Kalinin) Card 2/3 AMOYAN. I.A. ------ ---- Induced conductivity in germanium under bombaOrdment with potassium ions. Fiz.tver.tela 4 n3.1022719,-2726 0 162. (MA 151l2) 1. Politekhnicheakiy institut Imeni M.I.Kalinina, Leningrad. (Semiconductors--Effect of radiation on ion beams) (Potassium) ABROYAN, I.A.; LAVRGVI V.P. Secondary emission from dielectrics and semiconductors under bombardment with potassium ions. Fize tver, tela 4 no,11:3234-3259 'N 162. (MIRA 15:12) 1. Politekhnicheskiy institut imeni M.I. Kalinina,, Leningrad. (Secondary electron emission) (Alkali metal halide crystals) ~V~~o r 0 LAot SAMOLYTEt M.; DUBICKASp V., spets.red.; ABROMAITIENE, H._,_ red.; KINDIAKOVAt 0., red.; PILKAUSKAS, K., tekhn. red. (Use of synthetic materli%l-& in tthe light industry; bibliogmphy3 Sintetiniu medziagu panaudojimas lengvojeje pramoneje; biblio- grafine rodykle. Primenanie sintetichaskikh matorialov v legkoi promyshlennosti; bibliograficheskii ukazatell. Vilnius,, 1962. 69 P. (MIRA 16:2) 1. Lithuanian 5,3.RLlaudies ukio taryba. Centrine moksline- technine biblio*;eka, Vilna, (Bibliograpby-Synthetic products) SIMONAVICHENE, K.(Simonavicienep K.1; FMTSLrWS, A.[Kancleris, A.], otv. za vypusk; ERIS, A., inzh., opets. red..; ABROMATIYT1?E,Kh, [Abromaitiene, H.), red.; YEFII,,CVA, F., red.; PILKAUSUS,- tekhn. red. (Heohmisation and ai.tomation of production processes in the wood- working industries; Libliographical index] Medzio apdirbimo pramones gamybos procesu mechan-I.Pavimas ir automatizavinas; bibliografine rodykle. Vilnius, 1961. 1.17 p. (MIRA 15%4) 1, Lithuanian S.S.R. Liaudies technine biblioteka, Vilna, (Bibliograpby-Woodworking (Bibliograpby-Automatic ukio taryba. Centrine mok:31ine- industries) control) ZHILEVICH I.I.j red.; KMOVICH, N., red.; A~~9MAYTENE, G. [Abromaitiene, G.1, red.; LABKAUSKAS, S. red.; URBONAS, A., tekhn. red. [Electrophotography and magnetography; transactions of the Scientific wid Technical Conference on Problems of Electro- graphy held in Vilnius on December 16-19, 19581 Elektrofo- tografiia i magnitografiia; trudy. Pod red. I.I.Zhilevicha. Villnius, Respublikanskii in-t nauchno-tekhn. informatsii i propagandy, 1959. 390 P. (MIRA 17:3) 1. Nauchno-tekhnicheskaya konferentsiya po voprosam elektro- grafii, Villna, 1958. 2. Nauchno-issledovatellskiy instAut elektrografii, Villnius (for Zhilevich). O"ogitnic sub;dgmtts. 9. AbIposovki wrl llwknvia Cumi. c0aw in ll:sol, ntltj nvtral dpv!i of 1110t, ppt. Fie with NJ 1,011, filtm %vath: (14imlyeppf In IvIiel,wil, reduce i$ C,, A. ,Lfb S!iCl,, nnd tltj-ufe ul!b tit Ft VK I V. _V AUTHORS Lbrosenkova,V.F.tLogginoy,G.I.t~"Ilidw~k ,P.A.,?, -k-ember of the Academy TITLE Binding of Lime Into Calcium Hydrosilicate Under Normal Condit,-,.aa. (Syyazyyaniye iZTesti v gidrosilika'u, kalltsiya pri normallnykh usloviyakh - Russian) PERIODICAL Doklady Akademii Nauk SSSR,1957,Vol 115,Nr 3,PP 509-5110.3.5.*.~., ABSTRACT It is usually said that the formatiou of calcium hydrosilicate on the occasion of the interaction between limestone with ailica in the water medium by hardening of the binding oaloareous-sili- cious building materials can only take place by hydrothermal treatment in autoclayes at temperatures of an or.der of magnitude of 1700.At normal temperatures this process is assumed not to ta- ke place i.e.it is not expressod in a noticeable increase of strength of the formedprpduotion. Some building productions,as e.g. wall blocks,whioh are used more and more in low buildings, do not need the strength obtainable in autoclayes. On the other hand,the papers of the authors confirm the assumption that,be- sides a hydration hardening of the caloareous-arenaoeous bindin;,- substanoe,the binding of the calcium hydroxide gradually devclopa in the surface strata of the sand grains.The better this surface Was developed and the more it was activated in the common break- ing process,the greater is the quantity of limestone bound into calcium hydrosilicate.By means of the radioactive isotope Ca45 Card 1/2 (as Ca45(OH)2) it was determined that the bound quantity of cal- Binding of Lime Into Calcium Hydrosilicate Under 20-3-2.4/59 Normal Conditions. cium is proportional on ooarse-dispersed sands of the specific surface of the sand.In the first stage the chalk binding has a charao;er of the irreversible adsorption nhanging into a chemical surfafe reaotion.In the present paper the kinetics of the constant oaloivn binding by the sand with better daveloped surfaces (up to 2,9 m2/g) from a saturated solution was studied by the same method.In the case of the introduction of fine-pulverized sand which.was activated by simultaneous grinding with limestone the strength of the productions(with a reground sand filler)was increa- ead -nre and more in the course of time.The strengthening isjun- der i.,%tural oonditions,cau8ed by two simultaneoua prooesseetchalk bindingtl)into calcium hydrosilicate by silica and 2)by C02 into calcium oarbonate.Both processes take place very slOwly and are ba- Bed upon a diffusion process.There are enough reasons for the as- sumption that the chalk carbonization takes place much more slowly than its silicatization.Thi8 is especially confirmed by the radio- structural analysis.The line of the calcium monohydrosilicate ap- pears after two years whereas the lines of the calcium carbonate are still lack,There are 2 figures,2 tables,5 Slavic references. ASSOCIATION Institute for Fhysioal Chemistry of the Academy of Sciencesof the (Institut fizicheakoy khimii Akademii nauk SSSE) V331 AVAILABLE Library of Congress. Card 2/2 55(4) SOV169-21-4-12122 AUTHCRt Lo,,.,Ginov, G.I.# Rebinder.P.A. and Abrosenhova, V.P. TITLEi The Interaction at Ordinary Temperatures of Calcium liydroxide ,"ith Sand of Various Degroes of Disperoity PERIODICAL: Kolloidnyy zhurnalt 1959, Vol XXIr 1Tr 4, pp 442-448 (USSR) 0:1MACT: This is a study of the interaction of calcium hydroxide with sand in aqueous solution. The experiments i%rere carried out with the aid of isotope Ca45, used in the form of Ce (011)2' The binding kinetics of the lime were studied with the chemi- ', C al methoL; employed for the determination of free CaO. Object of the investigation was sand (quartz sand) of the Vol'sk de- posit of different disper s'ty2 (specific surface 3 ). The dis- persity varied from S 0.11 m Ig (natural state) 10 S values 2/g(finely ground). 1 equal to 0.621 0-95; .06 and 15.4 m The eyperiments, which continued for 6 months, were carried out at a temperature of 17 0 + 10 C. Figure I (jraph) illustrates the bindin,~ kinetics of calcium ions from a saturated Ca (0H)2 Card 114 solution with sand of the above-mentioned Sl values. The JO-."/!~19-2' 4-1 The interaction at Ordinary Temperatures of Calcium Aydroxide '~1th Sand of Various Degrees of Disperoity curves show that independently of the disperAty of the sand, the binding process always consists of two stages: 1) chemisor- ptiong .-,,hich ends i,,,ithin one hour after the start of the inter- action, and 2) a very long period of chemical binding of CaO at constant rates. The second processp evidently, is connected with the formation of calcium hydrosilicate, the lattcr being a new pliase crystallized from the 6rradually formed supersatu- rated solution. According to 11"rasill,nikov, this process will finally result in the full binding of OaC in the hydro- silicate, ivhf.ch correoponds to a final concentration ofe-,10.006 U/1, i.e. to a hydrolytic eqDilibrium of the calcium Iilicate in the oolut--;on. In the case of concentra'ed suspensions, this process results in the development of a solid crystalline hydro- silicate structure fil eference 11 -71 as is shown by tile aut!~,orsl e-'Periment-~ vith small solid blocks of lime-simd binder. The Card 2/4 specific surface of finely ground sand ivas determined on the basis of adsorption at low temperature. The medium values for SOV/69-21-4-12/22 The ~n 1' oraction at Ordinary Temperatures of Calcium Hydroxide "lith Sand of Variouz Degrees of D,spersity. each diopersity served for the calculation of the space occu- piod by a CaO moleculo (table, 1) The modium value (So) of this space was found tb bo 10.2 On the basis of the medium value S , and the value of CaO sorption, the authors also calculayed the values S 1 of coarsely-dispersed sanI, which cannot be detcriained on the basis of nitro6en adsorption. Both methodsli.e. the method of investigating the CaO binding proceso- with the aid of isotope Ca4 and the method of determining the active specific surface of sand through chemisorption of the zame isotope, permit determination of the surface of sands of any dispc.ooity. Low- tempo rat uro idoorption of nitrocon only for the deteriniination of the surface of highly-dispersed sands (.). 1 M2/6). The remaining part of the study can be summar- ized as follows. The dopcndonce of the rate of CaO bindint; on tI, dispersity of sand i.,; oubject to the equation of the s~micubi_ Card 3/4 cal parabola (fit-,ire 2). The I,ardening of lime-silica binders ;-"OV/69-21-4-12/22 The Interaction at Ordinary Temperatures of Calcium Hydroxide *'~'Iith Sand of Various Degrees of Dispersity. can be intensified (by 505,) ly activation processes, i.e. by passing the limesilica binder through a vibromill. The discovery of tne mcchanism of CaO binding opens new techno- logical possibilities to increase the strength of lime- silica products by adding substances, which increase the rate of dissolving of silica in water. In addition to the above- mentioned scientist, the authors mention D.S.Sominskiy and G.S. Khodakov. There are 4 tables, 3 graphs Lind 16 referenceso 14 of which are Soviet and 2 English. ASSOCIATION: Institut fizicheskoy khimii Ali SSSR9 1,1oskva (Institute of Physical Chemistry of the AS jSSR, Moscow) ~AJBMJTTEDi 15 November, 195B Card 4/4 LOGGINOV, G.I.; REBINDER, P.A.;A4ROSENKOVA I _Y.F. - . - -- . Interaction botwaea calcium hydroxide and eand of various degrees of dispersity at ordinary temperatures. Koll.zhur. 21 ao.4: 442-448 Jl-Ag '59. (MIRA 11:8) 1. Inatitut fizicheskoy khimii AN Sba, Moskva. (Calcium hydroxide) kSilica) ABROSIMOVp A. Standardization in the motorcycle Industry. Za rul. 21 no.2: 3-4 F 163. (MIRA 16W 1. Rkspert Gosudarstvennogo komiteta Sovets, Ministrov SSSR po avtomatizatsii I mashinostroy-eniyu. (Motorcycle industry-Standards) ABROSIMOV, I.I., red.; KHAVIN, T.N., red.izd-va; WDVEDEV, L.Ys., KORNBMAP V.I., tekhn.red. (Production standards on planning and surveying operations paid for by the piece rate system; automobile roads and city transport] Normy vyrabotki na proaktnys i izyskatellskie raboty, oplachivaemye sdellno. Woskva, Gos.izd-vo lit-ry po stroit., aelchit. i stroit.materialam. Pt-23- [Automobile roads, city transportation] Avtomobiltnye dorogi, gorodskoi. transport. 1958. 29 p. (MIRA 12:9) 1. Russia (1923- U.S.S.R.) Glavnoye upravleniye po stroitell- stvu avtomobilinykh dorog. (Highway engineering) .g~pSKV, n!# _Ajq~j~ey _TARBOV, Aleksandr Alekseyevich; __L _qy _qy~q~j PETROVSKAYA, Ye.K., red.; MANINA, M.P., tekhn. red. [K-750, M-62 motorcycles] Mototsikly K-750, m-61, M-62. Moskva, Izd-vo "Fizkulltura i sport," 1962. 204 p. (MIRA 16:7) (Motorcycles) GINTSBURGY M.G.; ABROSIMOV, A.A., Inzh., red.; VASIT red.izd-va; DEPRINA, N.F., tekhn. red. IIIYEVA, I.A.., (Construction and operation of motorcycles] Ustroistvo i obsluzhivanie mototsiklov. Izd.2., perer. Moskva, Mashgiz, 1963. 316 P. (MIRA 16:10) (Motorcycles) ii-'~ D. i. /f4 --I f-7i TjP( If, /F!~ T, T IC) 11 11 F lk i!7 J 11 n. i Ai,% Lri %r q- 06 L - !Lrl IS, + c c, c :-ear jong. 7he nwriner o-- sucil DaIr ~zxcltl--,l ~,,V 10%, TO L116 comolet-9 cessation o1, tjj,~ Drocess, j,,.cre-.,ec iniziaL tlu-ee ttmes the nurrber o f electron-nole pairs Tria,,, electrc,~.., a,.,d w~,ttl tile s ame Card 1/2 ACCaESSION IIR- AF)~-03'1655 initial ener7,. il-rcl,:,n,-,e,- ASSDOIATIO13%, Loningradsk.~y poljtekhniehon~jy jwtitut im. yl. 1. Kalinina (Leningrad Polytechrdc?-l Inttitute) -M~D~ 2LDec63 VEMR 1 005 (C. 2/2 ILL _ _9rP,-_ 7_46 PP , f~ ') j f kv ono; F!.OLJRCE: Fizika tverdogo tela~ v. -i. no. f, -L'JDJ, ICVIII-4- D i V- e x e 'i sin s )n P. re w me n t 'I de vC C C- G of these contained a source of a-kaline ions while the other contained the single crystal tarot, I w,-Iy that thc electric A. Thp target was oriented in s~jch j -'t- q,-imT I p wa.--, 7parnllel to tke 'he angle of incidence C.,d 1 /2 A~' -N 0 Ac- ion f the whpr the -V~~nt wz~ I thp Airnppn W,-IS cnI-; wt,,~Ie the pullse of conlu~-tivi-l and PISO I U 11 - - . - , , z wt,. i r h p v,:i ,r a Tr m rh tl~e varfa-- -17 f r-!?, w en in 7 'e c 'Inst i tute D. rM SOrMiTTLE); 29Lvc64 ,NO PLT SOV! 003 OTHER: 005 21 L 5409-66 El-.'T(1)/EWT(m)~T/EliP(t)/FdIP(b)/DIA (c) LJP(c) jD I ACC NR: AP5027306 SOURCE CODE: UR/0181/65/007/011/3159/3162 AUTHOR: Abroyan, 1. A.; Lavrov, V. P.; Titov, A. I. ORG: Leningrad Polytechn[c Institute (Leningradskiy politekhnicheskly institut/K6 r, im. M. I. Kalinina) TITLE: Secondary emission of germanium bombarded along various cyrstallographic axes by potassium ions SOURCE: Fizika tverdogo tela, v. 7, no. 11, 1965, 3159-3162 TOPIC TAGS: semiconductor single crystal, single crystal, secondary emission, _germanium si 1e crystal !5~' q I '." -I ABSTRACT: The ion-electron emission of germanium sing.;Le_.EU.Etaj~ is studied to determine the effect which the crystal structure of the target ha5 on secondary emission. Germanium specimens were bombarded with potassium ions at energies up to 7 kev, and secondary emission was measured as a function of the angle of inci- dence. It was found that the coefficient 60.1 (the ratio of the number of ions reflected from the target at energies greater than 0.1 kev to the total number of Card 1/2 C) r?,,n, L 5409-66 E%'T(1)/LWT(m)/T/W (t)/E'd'JP (b)/EMA (c) DF(c) JD ACC NR: AP5027386 SOURCE CODE: UR/0191/65/007/011/3159/3162 AUTHOR: Abroyan, 1. A.; Lavrov, V. P.; Titov, A. 1. S ORG: Leningrad Po hnic Instity lytec tp (Leningradskiy politekhnicheskiy Institut im. M. I. Kai-inina) 4 ) TITLE: Secondary emission of germanium bombarded along various cyrstallographic axes by potassium ions SOURCE: Mika tverdogo tela, v. 7, no. 11, 1965, 3159-3162 TOPIC TAGS: semiconductor single crystal, single crystal, secondary emission, ge ~aniu~m shingle crystal ABSTRACT: The ion-electron emission of germanium singj~ ~c~!tals is studied to determine the effect which the crystal structure of the target has on secondary emission. Germanium specimens were bombarded with potassium ions at energies up to 7 kev, and secondary emission was measured as a function of the angle of inci- dence. It vas found that the coefficient 60.1 (the ratio of the number of ions reflected from the target at energies greater than 0.1 kev to the total number of Card 1/2 L 14131-66 EWT (1)/t1-JT W )I'TIMTP(t')/_EWP(b) Jjp(~ JDIAT ACC NR; AP6000877 SOURCE CODE., UR 0181/65/007/012/366Q/3662 0 AUTHORS: Aby-oyan, I. A.; Lavrov,, V. P.. Fedorova, I. G. ORG: J~!jinarad Polytechnic Institute Im. M. I. Kalinin '(Leningradskiy politelchnicbeskly i-n-s-FIT~TET TITLE: Angular dependence of the secondary-emission coefficients of single crystal KBr bombarded with potassium lons SOURCE: Fizika tverdogo tela, v. 7, no. 12, 196,5, 3660-3662 TOPIC TAGS: potassium bromide, single crystal, ion bombardment, ~secondary emission, angular distribution :ABSTRACT: This is a companion pa er to similar work b the authors F on semiconductor single crystals ~FTT v. 7, 375_9, 196- The pFesent ,investigation is devoted to the difiectric K_Bt tingle crystals,Pwbose~ .p (100) face was bombarded with Ou KeefRassium ion beam witb energy; ~l -- 6 kev. Tffe- axis of rotation of the crystal coincide with the (1001 direction and made a right angle to the primary beam, the di- vergence of which did not exceed 2.50. During the measurements the CarJ 1/2 L 111131-66 .ACC NR: AP6000877 .target was heated to a temperature at which no surface charging by LD .the ion beam was produced (200 -- 300C). The results yielded non- :monotonic variations of the secondary-emission coefficient and of the positive and negative ion-ion emission-coefficients on the angle of incidence. In view of the increasing dependence of the secondary remission coefficient on the incident-ion energy, it is deduced that at still higher energies the increase of the coefficient with the angle will be steeper. This points out the advantage ol' using alkali- halide compounds as cathodes for multipliers used to register ions and neutral atomic particles. The positive ion-ion emission coeffi- cient was found to be larger by a factor 4 -- 5 than the negative coefficient. This is attributed to the fact that the reflected ions of the primary beam contribute to the coefficient of positive ion-ion emission. Authors thank M. -A. Yeremeyev and N. N. Petrov f or interest in the work and useful advice. Orig. art. has: 2 figures. ~SUB CODE: 20/ SUBM DATE: OlJul69/ ORIG REF: 0031 OTH REP: 001 ~Card.___ 2/2 L 36322-66 EWT(1)/EWT(m)/T/EWF(t)/ETI IT(c) GU'/AT/JD/JG ACC NRi APGO15792 SOURCE CODE: UiVO043166103010051083410839 AUMOR: '."Jroyan, I. A.; Yeremeyev, M. A.; Petro,, N. N. OIX: lo-ni i-rad Polytechnic Institute im I.I. I. N., linin kiy ilrititlit) ~z (LeninCrnds1.iy poh t; lzntiichr-~i- TI- I*": Irduced conductivity and secondary emission of semiconductors aW dielectrics uilioi- osi,Ave ion boiabardment TReport, Twelfth 1.11-Union Conference on the Physical Mi.,; -')f Cathode Electronics he-ld in O-c-tober--19G5/ ACU."CE. AN SSSR. Izvestiyn. Scriya fizichesknyn, v. 30, no. 5, 19G6, 884-889 TOPIC TAGS: nlkili linlide, s in[;le crystal, germt-nium, secondary electron emission, eleci-ric condiictivity, ion bombardment 'riie atitliors review the restilts of invcstigations conducted in the Ion -Pj-oce'sses Lnbovrt~i )I-Y 01 the Electronics Departiaeut of the Leningrid Poly clinic Tnsti- )1 1. nd germanium LnLe cc 1(;,~ jIvectron cinission under ion bombii-dmcn4 oi~nlkalj c 2nium ion bombard in"Ic rystnls tand condtictivity indLICed dryst. by ment. 1-r fixed energy of incident atoinic ions the SeCGiidary emission coefficient of an :iliz,-ili halide crystal decreased with increasing Ion mass; the coefficient foi, 0.6 keV 1s+ ions incident on the (100) face of an NnCl cry-.3-tal wns 2, and for 0.6 IcoV Ar+ ion3 thc ,;ccoiidary emission coefficient was 0.7. The 3ccondnry emission coefficients at U.6 hev incident ion energy for 11+, 112 and 11, Lons were approximately equal, but zL C.ard_1/2___ L 363 22-66 ACC NR- AlIG015792 at 10 kev tile necondnry emission coefficients for hydrogen molcculnr ion.-, were greater than for protons, and the datn were not. comptitibl-3 with the hypothesis thrit the mole- cular ion dissociates in tile first collision. Th-:i secondary emission coefficient de- creased with increasing tLempcrature of the crystal; this is ascribed to scattering of electrons oil their way to the crystal surface by )honons. Monsurements were made at incident ion cacrt;ier. down to 10 cV. Different iann behaved very differently at very l(,w Onergics; for some ions (110+ and Ne+ oil alkali halide crystals) the secondary emission cocffic~.cnt remained finite at the very lowest onervics, whereas for other ions their wasn threshold energy bel(Av which seccidnry emis3ion did not occur. The condtictivity induced in germanitm crysOls by n vait flux of bombarding ions incrensed with increasing ions energy nnd decreased with ir-creasing ion mass. rrom a comj~arison of the conductivity induced by ion bombardment with that indticed by electron bombard- mciiL it was estimated that n 100 eV K+ inon incic;ant oil gcniinniiun given rise to about 6 electron-hole pairs. When the incident ion envrgy wns equal to the threshold value of F.Scitz (Disc. Faraday Soc. , 5, 271 (1949)) , , t least 30 'j'0 of the energy of inciden I& ions and 5 % of the energy of I& ions was expc-nded in inelastic collisions. The in duced conductivity was maximum and the secondary emission coefficient was minimum when the ions were incident in one of the "transparent" directions [116 , L-111] , and [112] . Fr(xn a comparison of the induced conductivity and secondary emission coefficients of germanitun for electron and K+ ion bombardment, it was estimated that only one in sever al thousand of excited electrons escapes from thc crystal. Orig. art. has: 1 formula, 7 figures , and I table. SUB CCDE: 20/ SUIN DATE: 00/ ORIG REF: 105/ CFn1 REF: 001 Card L 10066,~-67- (-I)/ W(n. )/T/ Elm ~t) /".,I - - Wulko) JIDIMIG ACC NRi AP6015786 n, SOU11CH INDE: UR/0048/66/030/005/0865/0867 AUTHOR: ..Abroyan, I. A.; Titov~-A- I.- ORO: Leni!!grad Polytechnic Institute im. M.I.Kal.~Min (Imeningradskiy p6lU4~dlnIiche y instA-ut) TITLEt Changes in radiation conductivity under i.)-nbombardment Atoport, Twouth All-- .Union Conferenco on the Physical Bases of Cnthodo Blectronicp hold in Loningrad 22-26, rl-1- IntTrz SOURCE: AN SSSR. Izvestiyn. Seriya fizicheskaya, v. 30, no. 5, 1966, 865-867 TOPIC TAGS: germanium, single crystal, ion bombardment, lattice defect, electric conductivity, radiation effect ! AMTRICT: The effect of bombililime t ith 3 keV K+ ions oil the coefficient of radintlon I induced conductivity (r.-~t~o of tlizueed conductivity to the inducing radiation flux) iniumV'6 a of a 35 Ohm cm gormr Entnl\ as been investigated by a technique that is described ielsewhere by tho authors (Fiz. tverdogo tela, 7, 2007 (1965)). The surfnce of the tar- .[,ct was perpendicular to the 1113 axis nnd the bombarding ionn were incident ill tile [100] direction. A dose of 10R4 ions/CM2 was found to reduce the radiation-induced iconductivity coefficient by an order-oi magnitude. -The radinthn-induced conductivity-- :coefficient, as n function of the incidence angle of the inducing radiation, showed a !pronounced jrnximum at an incidence angle of 350, corresponding to incidence in the i A 015786 N N [1101(liNection. Although increasing the dose of 3 kcV h+ ions from zero to 3 x 1014 lions/ce' greitly reduced the radiation conductivity coefficient, it did not affect the position and relative height of this maximum. The number of pairs of Frenkel defects due to the ion bombardment was estimated by dividing the energy dose by half the thresh 14 ions/cm2 iold energy for producing a pair of defects. For the 3 x 10 does this cnlcu- lation gave a defect density of 1.8 x 1016 cm-2, corresponding to about 20 interstitial germanium atoms in each channel in the (110)direction. The authors argue that so high in density of defects should alter the dependence of the radiation conductivity coeffic- lient on the incidence angle, and conclude that the defect density was not actually so high as calculated. Two possible reasons for the discrepancy are suggested: either there may have been a partial anneal of interstitinl atom - vacancy pairs , or a par- ticle moving In the LIQ direction in a germanium crystal may expend considerably more than half its energy in collisions in which the energy transfer is below the threshold -for defect production. Orig. art. has: I formula and 2 figures. 3U13 r-CDE: 20/ SUEN DATE: 00/ ORIG REF: 004/ Cq11 REP: 002 LCard _vIr 8/0 62/013/006/019/027 B102 SW kUTHORSi G. T. and U. R. TITLE# Hauohnaya konforenteiya Mookovakogo inthenerno-fiziaheakogo institute (Scientific Conference of the MoscowtEnginetring Physics Inatitilts) 1962 PERIODICALi Atoxnays, snorgiya, v'. 13, no. 6, 1962, 603 - 6o6 TEXTs The annual conference took place in Uay 1962 with more than 400 delegates participating. A review is given of these lectures that or* assumed to be of Interest for the readers of Atomnaya onargila. They are followingo L. 1. Loypunskiy, future of fast re&otorel A. A. Vaoil'yov, design of accelerators for superhigh oziergios'l 1. Ya. Pomeranohuk, analytic'Ityp unitarity, and aoymptotio behavior of strong interactions at high energies; A. B. Migdols phenomenological theory for the aany-body probl I Yu.'D. Fiveyokiy# deceleration of medium-energy antiprotons in matte., Y-7y.-goian, Ya. A. loollovskiyj theory of the MOsobsuer offectl M. 16 Ryasanov, theory of ionization looses In nonhomogeneous madiual Yu. B. Ivenovo A. A. Rukhadsof h-f oonduotivitl of-suboritioal plasmal Card 1/4 S/0' 62/013/006/019/027 Nauchnaya konforentsiya ... Bio2YB186 design of 30-Hey slootron linear scoolerstorl To, 6e Pystnovo Lo A. Glaskov# Y. 0. Lointol A. 1. Finogenov, G. N. Skepokiy, V. D. Seleaney, sxperimental characteriatica of low-enorgy el-otron linear aoceleratoral 0. A. Zeytleak, V. M. Levin, B. 1. Piskunov, V. L. Smirnov, V. K. Khokhlov, radiooirouit parameters of JIO(LUE)-type soooleratoral 0. A. Tyagunov, 0. L. Val Idner B. M. Ookhborg, S. 1. Korshunov, V. l.'Kotov, To. M. Moroz, accelerator classification and torminologyj 0. S. Miloyanov, V. B. Varakeiff, P. R. Zeakevicht theoretical analysis of magnetron operationj A. 0. Tragovt P. R. Zonk8vich, calculation of attenuation in a diaphragmated raveguidel Yu. P. Lazarenko, A. V. Ryabtsev, optimum attenuation length for linear acoeleratorl A. A. Zhigarev, R. To. Yelineyev.1 review on trajeotographol X" .-Uorosov," 0. A. Tyagunoy, review on more than 500 ion bourosel Ut A. Abroyan,/V. L. Komarov, duoplasuatron-fyp* souros; V. S. Kusnetwovo A.-T-.-S-61-ny-ishkov, calculation and production of intense ion boamal V. U. Rybin (Ye. Y. Armenekly), inductive current transmitters of high sonsitivityl V. 1. Koroza, 0. A. Tyaganoyl kinetic desoriptionof linear acceleration of relativistic eieotronst A. D. Ylasov, phase oscillations in linear aoooleratoral E.'L. Burbhtsyn, 0. V. Voskrosenakiyp b4;&M field -effect# in the WaTtguide of an electron linear acceleratorl R. B. Bobovikovp Card 3A. SOLNVSMVp A. 1. J KMROVp V- P.; XUZn-=Vo V. S.1 AMOTANO M. Aq MNOVp N. F. ZMU2??IKOV, F. G.; TOM# I. M-1 ZAEWTSKATA,, 0. IATMANISOVA, 0. m. and GERASIMOV, V. Fe Current Injector for a Strong Focuased Linac. report presented at the Intl* Conf. on High Energy Accelerstore, Dubnav August 1963. ACCESSION NRt AT4035115 6/3092/63/000/001/0119/0133 AUTHOM :Abroyan, M. A.1 Komarovo V., L. TITLEt Pulsed large-current ion source SOURCE: Moscow. Nauchno-isaledovatellskiy institut elektrofiziches- koy apparatury*. Elektrofizicheskaya apparatura; sbornik statey, no. 1, 1963, 119-113, and chart B facing away-from p.204 TOPIC TAGS: ionized plasma, plasma jet, plasma sourcet proton syn- chrotron, plasma injection, ion beam, ion source ABSTRACT: In view of the lack of published data on ion sources with beam currents on the order of 1 ampe're and above, the authors report an investigation of a pulsed ion source of the dual plasma- tron type, intended for pre-injection in a.,proton synchrotron. The present dual-plasmatron output limit, approximately 530 milliamperes, has been increased by modifyin the geometry in the ion selection 19 Card ACCESSION NR: AT4035115 region and by operating at a forced discharge mode. In addition to attaining large current it was necessary to impart to the beam definite optical characteristics to match it to the optical system of the acceleratoritube. The plasma generation principle is the same as proposed by Ardenne (Tabellen der Elektronenphysik, Ionenphysik und Uebermikroskopie,-Veb Deutsch. Verlag der Wissenschaften, Berlin, 1956). The pulsed current reaches 1.5 amperes, and a focused ion ,abeam with a current of approximately 170 milliamperes can be obtained, with a minimum diameter of 10 nun at 70 keV. Experiments show that :if an immersion lens with larger potentials and compensatiop is used, a much larger,ion current can be focused in this diameter. present value of the beam current is limited by the limits of plasma flow through the emission aperture in the selection region, and by the slight divergence of the plasma as it diffuses through a small aperture. Further increase in the ion cu--rent can be attained ,by increasing the.aource dimensions and source parameters. A con- tinuous current of.1 ampere can be attained by Inproving the cooling Card 2/5' ACCESSION NR: AT4035115 of the anode and of the grid in the drawing electrode. Multi-jet -plasma sources, which produce a dense plasma with large surface in the selection region, will contribute to the production of larger ion beams. The authors thank 1. P. Maly*shev for interestlin the work, F. G. Zheleznikov and A. 1. Solny*shkov for a useful discus- sion, and V. S. Fok,"06n, V. A.i,Grinevich, and 1. 9. Dorofeyev for help with the work. Orig. art. has: 12 figures. ASSOCIATION: None r SUBMITTED: 00 DATE ACQ.- 07May64 ENM: 02 SUB CODE% ME, NP NR REF SOV: 006 OTHER: 003 Card 3/5 1,CCZSSIOII NRt AT4035115 ENCLOSUU:01 Construction of ion source gasket, 2 - coil, 3 - a=or, 4 cathode , 6 - cathod current -lead, 6 - gas supply, 7 -'iziiemed- iate anOd8 . 8 - cooling unit j 9 - Pvincipal anode, 10 - drawing electrode with grid, n - water Card 4/5 Principal diagram of test stand vacuum containert 2 -- &wAliary container in which the tour