SCIENTIFIC ABSTRACT LEBEDEV, S.V. - LEBEDEV, T.A.

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December 31, 1967
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SCIENTIFIC ABSTRACT
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Fz \j V An i RogadAvAll & I -Ungmalr wl@mke a I=wweh =do of a vicaum tube by an lmpoMl. lot., Acad. Scl. UZZM-,ffm__ww). Zhar. Ekipti. V Yeard. 1%. 27, 497-WO(1954).-Upon heatiag the W cath-' ode of a vacuum tube by an Impube current of about 3A X ; P amp,/Sq. cm. to Saode4m -pulse Current 1.* appeared, - which IM 100 Umes greaw than the anale Curreut 1.*, Which *aslimited bytheswacharge. Upoq1teatiog*1the Cathode with an Impulse current of UP amp./sq; Cm. the, current 14 was only about 1,0 times ad great as I.,. lithe: suade vWtage and 1: were decreaied, the anomalous tnsg- altudedlaolvadecreased. A ratio rtl.*of about lot was' found at anode voltages V. In the ortler of 100 v., just as- well 04 At &4 V.. where the cd& of long to the tube at the - expense of the anode &M was impossible. This anomalous 14 appeuvd ter abouct" sm. after the current i W been' switched off, wit" bated the cathode (in the absence of sa otho current). but 1, did not grow any more during U., The f.,t that 1. wa , much great, tun cooki not be ex9taluM br a neutralization of the space, charge by faus, becauce this anomalously hish 1. appeared whas the no. of Iona In the Who was rather small; If tids; 110, tocreased, 1. became aftwt ---I to R. The gmw#A d re was aw@@ed by a change J tf@e state of the cathode The growth of theanocle current on" the value Ila the domaln at the eWced th he ;=t i IM whl@ t (It" of hostlac of the cathat b the of validity of the Hagaslavskff-Langunur law). VVInk of I& above i.0 (ie.. tM czeeptlou of the 9 eL. law) = fur- ther hating d the cathode wast be explained by the kmvy Increm of the endulou from the exthode. USSR/Physics High-density currents FD-986 Card 1/1 Pub. 146 - lo/2o Author Lebedev, S. V. Title :Phenomena in wolfram conductors just preceding their explosion under the action of a strong current. Periodical :Zhur. eksp. i teor. fiz., 27, No 5 (11), 605-614, Nov 1954 Abstract :For a current density of about j - 5 105 ampere/=2 one observes anoma- lies in the state of wolfram, which were discovered earlier for the case of currenz densities greater than 5-lo6 ampere/cm2 (S. V. Lebedev and S. E. Khaykin, ibid., 26 (1954), 629 and 723). I-Then a current of about 5.105 ampere/cm2 suddenly enters a circuit it is noted that wolfram does not become fluid although its energy correspond-to the energy of the liquid state. Indications of anomalous emission are observed simultane- ously with indications of anomalous dependence of resistance upon energy. The author considers as.sumptions concerning the character of the varia- tions occurring in a metal when heated by a current of large density. Five references (e.g. L. A. Ignatlyeva and S. G. Kalashnikov, ibid., @@2, 385, 1952). Institution ! Physics Institute imeni P. N. Lebedev, Acad. Sci. USSR Submitted : January 1, 1953 _6 A c.,6 e. We- ko@ 5 - V- USSR/Physics - Electron emission FD-1892 .Card 1/1 Pub. 146-iP/21 Author : Borodovskaya, L. N., and S. V. Lebedev NWJWI V'L'L@2 : Dependence of electrical conductivity and electron emission upon the energy of a metal in process of its bein@; heated by a current of large density i`-@riodical :Zhur. eks-D. i teor. fiz. 28, 96-110, January 1955 11 Abstract : During the heating of nickel conductors by a current of 60,000 to 5,000,000 amperes per square centimeter the authors observed a phenomenon of the same character as was observed earlier in wolfram by S. V. Lebedev and S. E. Khaykin (ibid., 20", 629, 1954 etc.). In the investigation of the dependence of the resistance R of the conductor upon the energy E introduced into it, they observed in the curve R = R (E) points of discontinuity whose posi- tions in resistance and energy do not chapgre with chsrLge in the density of the heating current (DII, V1, Au, constantan). Investigation of the emission showed that the anomalously large emission from nonruptured conductors can decrease although the rate of enerGy onset into the conductor exceeds the loss of encrCy at the temperature of fall in the case of stationary heat- in,,. The present data characterizing I _, th@! rate of dccrease of emission aft@.,r disconnection of the heatinS current. 12 ref. Institution: Physical Institute im. li@bedev, Acad. Sci, USSR Submitted August 1, 1953- Ingot; LF.BEDEV,S.V. PA - 2073 'TITLE: Ye-�1.-y-TToTEe- critical Remarks of I.F.KVARTSKRATA concerning some of our papers. (Otvet na kritic"eskie zamecanija I.F. XVARTSKHAVY po povodu nakch statejq Russian). PIRIODICAL: Zhurnal Eksperimentallnoi i Teoret.Fiziki, 1957, Vol 32, Nr 1, pp 144-146 (U.S.S.R.) Received: 3 / 1957 Reviewed; 4 / 1957 A13STRACT: In some of his previous papers the author investigated the de- pendence of the electric resistance R and of the electron emission on the energy E of the metal which is deposited in it at a current density of j - 105 _ 107 A/om 2. The main results of these works are again enumerated. According to the criticism of I.F.KVARTSKEAVA, Zhurnal Eksperimentallnoi i Tooret.Fiziki, Vol 30, p 621 (1956) it might be assumed that the author in his previous works had assumed an abnormal dependence of the re- sistance R on E in the case of E '@ W H and the exclusion of OMVS law. (The significance of W H is not given here). The lack of anomalies of R and E in the case of B 1< W.1 however, was ascertained by the author in a previous work with an accuracy of 5%. The author did not notice any deviations from OEMIS law Card 1/3 but he found that the mistakes ascribed to the invalidity of PA - 2073 Reply to the Critical Remarks of I.F.KVARTSKEAVA concerning some of our Papers. OHM'S law by other experimenters is due to inductive distortions of the oscillograms. Contrary to what KVARTSKHAVA says the author actually introduced the correction for inductivity. KVARTSKHAVA says that the author did not measure E and R correctly, and that the energy surplus of the wire noticed in the case of large j is connected with the macroscopic motion of the metal and not with its interior energy. The conclusions, however, arrived at by the author are confirmed by new data according to which at j >, 5.106 A/cm2 the motion of the metal up to the moment of explosion cannot destroy the constancy of the cross section along the wire. If the current is switched on at such values of E as are a little less than Ec (the significance of E0 is not given here), the explosion of the wire no longer takes place and the wire disperses in droplets. KVARTSKHAVA tries to explain the anomalies of the anode current Iaby the ignition of the discharge. In the case of Card 2/3 the ignition of discharge, however, the increase of diBcharge Reply to the Critical Remarks of I.F.KVARTSKHAVA PA - 2073 concerning some of our Papers. is limited by the properties of the exterior electric circuit. Furthermore, KVARTSKHAVA declares, as the author believes with- out justification, that the magnetic field of the current i which heats the wire is bound to shut off the anode current I a at the here applied anode voltages Va < 1kV, if no dis- charge occurs along the wire. KVARTSKHAVAIS explanation that the anomalies of the anode current are due to a discharge and some other statements he made do not agree with the author's experiments. ASSOCIATION: Physical Institute "P.N.LEBEDEV" of the Academy of Sciences of the USSR PRESENTED BY: SUBMITTED: AVAILABLE: Library of Congress 2661 S t 327 2 '0 'hesy-oso 101 .5 1 Uats.-I Dt" )'tric -1951, 1951 ale Vz-j'Y.3- 9 Oj az 6 sioa atviyela at. r qla'lle thOT % 'R a& &ey TLe of luete'.11.4,0 ,9,116 t t jue I?,Ys tTao 'j.011 %8A jaes St TIT Ulla_rr'o' - 201/ 1951 tae 6 a& a stete .D.10 199 tes 5.10 X'L I P vea.% 5 'Stlge. ?Balo '11606j. @Uq .105 aoUj9"O'j-s it resent 'N OTIK Of 5 U a _as TbLe &SVLS a va t t t t'lle t"e cO'UqSr':a11 Vjre a.. tj.OVL ths' JOB J.On -%U te& 'bj .7- (t) - as suull? t-he e%v tj-je VAre SrL& r the of oti OYL Of iliqesti-93. (t) here t'Ae luomelit stril j. gs,$ MS of IL vies T'ae -Pq 't j'ng s r (t t-no&% t Ut 't1le 0 a. celj.'bT0, XjttL O.'ar all vi-til 'the of t1le gr9-'P'hS & 1T (t r U. oq-l 05 -P'@'*to (t)i(t) "', ire Sud. tjVjs 'W Or St f. 5. (t) ists.TLee Of tyLe of Ile 10.res tests er evious 0 -orl. 13L . t1le res jjd'j1S -a of 'Pr tA 0 -111a 0 - totl eleluir", ttLe a'e'aotes The to I &as er Te ses 9 )S-Loil IS 06 )@r J@/GJA2 ttLe e%VJ( 8'X1t)D'OT resiste'll S-at IOr 0 t1-je 0 lovi.1% 10 Ofa I t "1 5 0 r a Tut soil Of t-ne T t-ae 9.60 a 0 U19 Sri 2 &TA s' tt cc st ev@ vas-t 9. "qtel tA'O-A 10-as 0"AO%S Of t'he 4 zet&l '13 COX& Explosion of * Uetal Due to an Eleczric Current. PA - 2661 ideas with conclusions arrived at by other a thors. u5 2 Conclusionst At current densities Of J 5. 10 A/cm the wires (&_,-/ 70 (1163, ISI 2, /ii?j 28773 B/057/61/031/010/006/015 B104/B125 AUTHORSt Lebedev, S. Ya., Stavisskiy, Yu. Ya., Bondarenko, 1. 1., yev, b. A.--,-Stakhanov, 1. P., and Stumbur, E. A. TITLEs, Plasma oscillations in ion-beam neutralization PERIODICALs Zhurnal tekhnicheskoy fiziki, v. 31, no. 10, 1961, 1202-1208 TEXTt The consequences of the condition that the total ion current in a plasma vanishes have been studied. Electrons and ions are assumed to be emitted orthogonally from a conductor surface at the velocities v 10 and v20' Equations of motion and continuity for electrons and ions are , co, the condition that studied. For the potential y in the interviil 0,