SCIENTIFIC ABSTRACT GANTMAKHER, F.R. - GANTMAN, V.

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SCIENTIFIC ABSTRACT
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AUTHOR3; Ayzerman, 14. A., Gantmakher. F. R.(Mo.acor,) 1o3-19-06-9/13 TITLE: On the Stability of Periodic Methods of Oi;eration in Non- linear Systems With Piece-Wise Linear Charocteristics (0b uutoychivosti periodicheskikh rezhimov v nolinoynykh sistemakh s kkusocbno -lineynoy kharakteriatikoy) PERIODICAL: Avtomatika i talemekhanika, 1958, Vol 19, Nr 6, pp 6o6 - 6oS (USSR) ABSTRACT: A method is described here by means of which the equations of a linear approximation for solving problems concerning the stability of a periodic solution in a system with piece- wise linear characteristics can be found. As in references I and 2 the automatic control system is here expressed by equa- tion (1). At first the more general equation (2) is investi- gated and beside it also the linear equations (3) which, supplemented by linear relations, yields equation (4). Formulae (3) and (t~) toj;ether determine the discontirmuri into~;ral curves. The totality of (3) arid (4) is deaienated an linear approxi- mation of (2 )for the periodic solution of (2)zi - z i(t). (f(zj) Card 1/2 is given function which is piecewise linear). By additional On the Stability of Periodic Methods of Operation 103-19-6-9113 in Nonlinear Systems With Piece-Wise Linear Characteristics limitations the following theorem is obtained:(reference 1). When the zero-solution x i - 0 of a system of linear approxi- mation (3) + (4) is asymptotically stable, the periodic so- lution z T.(t) of the set of equations (2) also is asympto- tically stable. Going back to the set of equation (1) the equations (31) and (4') are obtained for it. Linear relations are found and written down in matrix form: x(t 0+,r). ux(t 0)3P where U denotes the constant transformation matrix. For the stability of the periodic solution of syster, (1) it is sufficient when the roots of the characteristic equation det(U-X E)-O lie on the circle of unit radiua. The problem concerning the stability of the periodio solution of system (1) can also be solved by direct alignment. There are 4 refer- encesp 4 of which are Soviet. SUBMITTED: May 159 1957 Card 2/2 1. Servomechaiiisms--Mathematical analysis : I I I ~~ . I .- AYZERMAN, M.A.; G&WHARM, F.R. (Xookva) I ... I Stability of periodic motions. Prikl.uat. i makh. 22 no.6: 750-758 N-D '58. (MM 11:12) 1., Noskovskiy fisiko-takhnicheakiy inatitut. (Notion) 13(1) HASE J. BOOK alWITATION SQV/3113 Gantmakher, Feliks Ruvimovich and Lev MiVia,r1c;vi,:_n Levin Teoriya ppleta neupravlyayemykh raket (Theory of Unguided Rocket Flight) Moscow, Fizmatgiz, 1959. 360 p~ 8,000 copies printed. Ed.: G. I. Felldman; Tech. Ed.: N. Ya. Murashova. PURPOSE: This book ia intended for studento of exterior bnlliatics. It will be of interest to military, scientific, and technical Wroonnel concerned uith unguided rocket flight. COVERAGE: This book constitutes a systematic course in the theory of exterior ballistics of unguided rockets nnd presupposes a knowledge of mathematics and theoreAcal mechanics at the vtiz level. The book considers -hio major prob.Lem3: rocket trajectory and rocket dispersion factors, Approach to the problem and actual execution are the result of Soviet thinxing and do not re- flect work of western scientists. Rocket trajectory, the "soldd state principle", vertical and distance dispersion, antitank rockets, finned and rotating rockets, effect ok wind and Coriolis foree, and aerodynamics are discussed. Examples of computations are given. The authors thank Yu. 1. C ard IAO Theory (Cont.) SOV/3115 Korostelev. There are 12 references: 8 Soviet, 2 English, and 2 French. TABLE OF CONTENTS: Foreword 7 Basic Definitions and Symbols 9 Ch. I. Equations of Rocket Motion 1-1 1. The rocket as a system of variable composition 11 2. Theorems on the chAnge of mementum and of kinetic moment for a system of variable composition 12 3. Systems of variable composition with a rigid shell. Rockets 16 4. "Solid-system principle" ("equivalent shell") for a rocket 19 5. Equations of motion of the.center of mass of a rocket 20 6. Equations of the rotary motion of a rocket 21 Ch. II. Calculating the Trajectory of a Rocket 24 7. Statement of the problem 24 8. Reactive force 25 Card 2/J_0 Theory (Cont.) SOV15113 9. Equations of motion of the center o" gravity of a rocket on the powered section of the trajectory 28 10. Tsiolkovskiy's fonmla, 30 11. Change in the speed of the rocket on the powered section of the trajectory. Determining the arc of the trajectory 34 12. Direction of the rocket speed on the powered section of the trajectory. 39 13. Consideration of the effect of drag and of weight force on the speed 42 14. Calculation of the trajectory of a rocket 61 Problems 62 Ch. III. Fundamentals of the Theory of Dispersion of Rockets 67 15. Introduction 67 16. Factors causing lateral dispersion 68 17. Continuous random quantities 70 18. Role of the powered and unpowered sections of the trajectory in the lateral dispersion of rockets 75 19. Angular deviation at the end of the powered section of the trajectory and its horizontal and vertical projections 77 Card 3/10 Theory (Cont.) SOV/3113 20. Random vectors 81 21. Angular dispersion and its relationship to lateral dispersion 83 22. Distance dispersion 84 Ch. IV. Dispersion of Finned Rockets 87 23. Introduction 87 24. Statement of the problem 87 25. Equations of motion 89 26. Integrating equations of motion 92 27. Integrating equations of motion In the case of an incomplete system of forces and moments 94 28. Dominant role of asymeti.7 af the reacti-Te force in the angular dispersion of Linned vockets 98 29. Calculating the dispersion of specific types of rockets 99 30. Simplification of the basic formulas 103 31. Critical section of the trajectory 105 32. Formulas for the attack anglecr and the angular displacement 107 33. Graphic method of calcu.3ation. Cormils spiral 110 34. Basic calculation for=Lla 1-14 35. Dependence of the angular dispersion on the design parameters of the rocket and the length of the launcher U7 Card 4/10 Theory (Cont.) GOV/5113 36. Effective length of the launcher 120 37. Stepped diagram of reactive acceleration. "Active-reactive mines". Multistage rocket 122 38. Firing rockets from an eircraft 126 39. Angular dispersion caused by initial perturbations 127 40. Methods for reducing the dispersion of finned rockets 130 41. Integrating the basic differential equation in the case of a complete system of forces and moments 130 42. Formulas for the anglescP and Y(in the case of' a complete system of forces and moments 132 43. Investigation of the formulas obtained. Primary and secondary forces and moments 134 44. Coriolis force and Coriolis moment 139 45. Effect of the Coriolis force and Coriolis moment on the lateral displacement of a finned rocket 143 Problems 145 Ch. V. Dispersion of Rotated Finned Rockets 151 46. Introduction 151 47. Statement of the problem 153 Card 54.0 Theory (Cont.) SOV/5113 48. Rotational reactive moments 155 49. Equation of rotary motion 159 50. Integrating the equation of rotation l6o 51.' Analysis of the character of rotation 165 52. Determination of the angular deflection of rotated finned rockets 168 53. Calculation of the angular deflection vith the aid of the kernel R(sJQ5) 170 54. knalysis of tbe angular deflection of rotated finned rockets 175 55. Role of the eccentricity of the reactive force in the lateral dispersion of finned rockets 178 56. Case of arbitrary motion along the launcher. Firing from an aircraft -182 Ch. VI. Dispersion of Antitank Finned Rockets 184 57. Introduction 184 58. Basic characteristics of the ballistics of antitank rockets 185 59. Effect of the aerodynamic forces and moments on -the angular de - flection of antitank rockets 188 60. Integrating the equations of motion 191 Card 6/ .Lo Theory (Cont-) SOV131-13 61. Calculation of the angular deflectirin 194 62. Range of a straight shot 198 63. Analysis of angular and lateral dispersion of' antitank rockets 199 64. Vertical dispersion of antitank rockets 204 65. Calculation of -the anbl.ar deflection for certain forms of the a(t) diagram 206 66. Effect of the Coriolis force and the Coriolis momen' on the dispersion of antitank rockets 211 Ch. VII. General (Three-dimensional) Problem of the Motion of Rockets 215 67. Introduction 215 68. Equations of motion of the center of grivity of a rocket 215 69. Equations of the iotary motion of a rocket 218 70. Forces and moments acting on a rocket 221 71. Linearization of the equations of motion 223 72. Integration of the equations of motion 228 73. Spinning rockets 232 74. Non-spinning finned rockets 233 75. Rotated firined rockets 234 Card 7/10 Theory (Cont.) SOvI5113 Ch. VIII. Spinning Rockets 237 76. Acc-aracy criteria for the flight of spinning rockets on the unpc~wered section of the trajectory 237 77. Condition of flight stability on the powered section of the trajectory 245 78. Calculation of the angular deflection of spinning rocla ts on the powered section of the trajectory 246 Ch. TX. On the Effect of Wind on Rocket Flight 254 79. Introduction 254 80. Physical picture of the phenomenon 255 81. Angular deflection of a finned rocket on the porwered section of the trajectory 257 82. Corrections. due to the vind,, to the coordinates of the impact point of a finned rocket 261 83. On the possible effect of wind on the dispersion of rockets 263 84. General case of motion of a rocket on the powered seetion of the trajectory in the presence of wind 265 85. Non-spinning finned rockets 271 86. Rotated finned rockets 273 Card 8/10 Theory (Cont..) 87. Spinning rockets 274 Appendix I. Formulas for Auxiliary Forces in the Equations of Rocket Motion 277 1. Second form of the equations of the momentum wid of the kinetic moment for a body S 277 2. Formulas for momentum., Coriolis force, and Coriolis moment 281 3. On the displacement of the center of mass with respect to the body of the rocket 284 Appendix II. Brief Data on the Aerodynamics of a Missile 285 1. Introduction 285 2. Elements of the tbeory of similar phenomena 286 3. Methods for describing aerodynamic forces and moments 289 4. Drag 292 5. Lift 296 6. Equa;ltorial aerodynamic moment 299 7. Equatorial dAmping moment 304 8. Axial aero-i'vnFunic. moments 3o6 9. On the effect of ae-rodynamic characteristics on the flight of a missile 309 Card 9/10 Theo.r7 (CC-Tit.) Solt/31.13 TABLES I. Table of ~ (M) functions for Siaccils drag laws, 1930 and 1943 313 Ii. Tdble of tKe H(Y) function 314 Ma. Table of K( f'unctions 315 IIIb. Table of Y-1 ) f~anctlons and K function s 316 17. Vable of tHe fun-etions F(v): L,(v~, L2(y), L3(v), L4(v), L 5(v), M(v).. N(v) for the drag law of 1930 317 V. Table of the functions z ), 1~(z (z ), ~r(z ) 325 o cr 0 . VI. Table of Bessel functions and Fresnal integrals ' 327 VII. Table of the functions.I(x), I ( x), I W, H(x) 349 VIIIa.- Table of fun-etions for a recti;~;iar diagram 353 VIIIb. Table cf f%metions for a trian ,gular diagram 354 VIIIc. Table of ( Aoc, functions 355 Bibliography 357 Subject Tndex 358 AVAILABLE: Library of Congress Card 10/10 AC/os 2/2/6o Af A~L, 66 .4 a m i 3i 143 Oili, 19 GOTHADUR, Felike Ruvimovich; ILOICHETA. GA. red..- YMWOTA, Ye-A.,p tekhn.red. (Lectures on analytic mechanics] Lektaii po analiticheskoi mekhaniks. Moskva, Gos,,Izd-vo fixiko-mtem.lit-ry 1960 296 p. imlu i4:4) (Mechanics. Analytic) S/194/61/000/006/021/077 too 0 D201/D302 A.UTHORS: Llyzerman, M.A. and Gantmakher, F.,R. TITLE: Fundamentals of the theory of non-lincar automatic control systems with diSCOntinUOLIS ch,:ir --c teris tics PERIODICAL: Referativ-nyy zhurnal. Avtomatik~a i redioelektroni-ka, no. 6. 1961, 33-34, abstract 6 V242 (V sb, Vses, Mezlivuz. konferentsiya po teorii i metodam rascheta nelineyn. elehtr. tsepey, no. 1, Tasbhent, 1960, 30-44) TEXT: The analysis of systems is given which differ from the linear ones by the presence of one or several cleriients Nrith str.-dght line segmented characteristics. The peculiarities are explained in the notation of equations of motion in discontimous systems and of the Drocesses occuring during the transition over the discontinuity surface (slip states). An exact method is suggested for determin- ing the periodic states and an analysis of their stability is given Card 1/2 S/194/61/000/006/021/077 Fundamentals of the theory ... D201/D302 for the general case. The idea of a linear appro-1-imatiou is intro.- duced. It is shown that in discontinuous systems equilibrium states may occur an analysis of which is given. 6 fignxes, 18 refer- ences. 2~zstracter's note: Complete translation-7 V 9 Card 2/2 L) L) 0 L) 80248 S/040/60/024/02/12/032 AUTHORS: Ayzerman, M. A., Gantmakher, F. R. (Moscow) TITLE: On the Stabilit f 'Position of Equilibrium in Discontinuous Systems PERIODICALt Prikladnays, matematika i mekhanika, 1960, Vol. 21t, No. 2 pp. 283-293 TEXT: Let a discontinuous motion be described above or below the sur- face (2) F(x) = 0 by the systems of equations (+1) Lx f * (X) or Lx (X) at- Both systems "re assumed to possess unique solutions for given initial conditions and to be without singular points on the surface (2). The motion of the image point on (2) is not defined by (�1) and must be additionally determined. Thereby positions of equilibrium can arise Card 1/2 80248 S/040/60/024/02/12/032 On the Stability of the Position of Equilibrium in Discontinuous Systems on (2), the stability investigation of which has to be car--r-ied out either by considering the additional conditions or by considering the systems (�1). The last case is investigated in the present paper. Let (2) be the plane x, =O, in the semiplane xr, = 0, x1, > 0 the trajectories of (+1) are assumed to proceed downwards and in the semiplane xi, = 0, x-1 < 0 to proceed upwards. Then (t1) describes a point transformation G, of the semiplane x h = 0, X, ;;- O-into the semiplane x. = 0, x1l< 0 and (-1) describes a point transformation G of. x = 0, x 0 into x , = 0, x, > 0. The limit x, = 0, x. = 0 consists of fixed points of the transformations G,, G~., G = G~G,. The stability of the fixed'~oint x = 0 of G is equivalent to the stability Of the Dosition of equilibrium in the orisin (see (Ref.8,9)). It is shown that, if f4 (0) and f- (0) are not collinear vectors, the P'Osi- tion of equilibrium x = 0 is unstable. In the 6ase where f4 (0) and f- (0) are collinear the authors give sufficient conditions for the stability and instability of the fixed point x = 0 (generalization of the results'of Yu. J. Neyma:rk (Ref.8),(Ref,5)). There are 3 figures, and 10 references: 8 Soviet, 1 ("':eririan and 1 Italian. SUBMITTED: November 3, 1959 Card 2/2 31~33 S/569 61/001/000/018/019 D274 D004 IWo (no PL 14 f AUTHORS: Ayzermanp M. A., and Gantimakher, V., R. (USSR) TITIAt Some problems in the theory of nonlinear control systems with discontinuous characteristics SOURCE s International Federation of Automatic Control* let Congress, Moscovp 1960. Teoriya, nopreryvnykh sistem. Spetsiallnyye matematicheskiye problemy. Moscovq Izd-vo AN SSSRp 1961. Trudyp v. 19 679-690 TEXTs A system with one nonlinear element in described by n &,Jxj + (i - 112t ... qn) 9 W J-1 where f(xl) in a piec*viso linear function. If the phase space of the system in divided by the discontinuity surfaces Card 1/7 31 3 S156 61/001/000/018/019 Some problems in... D274 B304 F,,( (Xl9X29 ... 9X 0 192900ot1m) (2) a into parts, then the process In each part Is described by i1 0 fi(xj1x2V---1Xn) ; (I - 199YOU090) 9 (3) where the right-hand sides are continuous. Certain aspects of the pro- ceases are discussed which &rise on passing from one system (3) to anotherp through (2)., An exact method In proposed for deteruining the periodic solutions in systems of type (I)* 'Stability of the periodic solutions is analyzed. The systems of Eqn. (1) or (3) do not completely detemine the motiong an the passage of the representative point in phase apse* through the discontinuity surface is not taken into account, nor is the motion of that point along the surface. For that Furposeq the discontinuity surface is dividedg by means of the manifolds r, + and r - p into slip regions C and regular regions Po The motion of the representative point is determined by means of theme regions. Furtherp the response equation is defined as that obtained from system (1) by eliminating all Card 2/7 31133 S/50 9;~'Oijo 01'/000/018/019 Some problems in... D274/11304 X, , except X, W X 0 If f(xl) is continuous and sufficiently smoothp the response equation for system (1) in written 1D(p)z - 11(p)y (4) whore y Ax) 9 p x - X, dt But in the present case,, Eq. (4) has to be supplemented by the conditions (jumps) at the discontinuity surfaces Card 3/7 Some problems in..,, 31333 3/569/01/001/000/018/019 D274/WO4 0 t eu b ".10 ~o 0 ~1- - b s + a ~ I b ~ 11 o , 0 o I t 0 , U 0 a 0 0 a 4 0 j a U -D 0 0 0 a a (5) Ao U-1 + a, D_2 + + , A_l 0 - b4) Ilk_, + b ,'nn_2 + + bn-l 10 0 . 'whe re and ^r, are the discontinuities of x and y respectively and D(p) = so? + e o o + a n K(p) = b + + b 0 n Further, the concep t of "response equationfl is discussed. The conditions of transition from one branch of the characteristic to another in systems Card 4/7 31333 S/669/61/001/000/028/029 Some problems in... D274,71~04 of type (1) involve 5 possible cases. Two of these cases correspond to special switching conditions and were apparently discovered by the authors; they are called "pseudoregular" and "pseudoslip* respectively. In all systems of type (1), as well as in systems vhich differ from (1) by the presence of a given periodic disturbance,, the periodic solutiens can be found exactlyg i.e.9 without neglecting the harmonics. For this purposeq the authors used a method proposed by Ye,, N* ROZeDVSN8Orj vheroby System (1) is replaced (4) and (5); in (4), x and y are replaced by +00 x .5 i r :..) t r oc) in expressed in terms of inI and Ii. tem of transcendental equatione in t,, periods. Stability of periodic solutions~ irwt r 00 These equations lead to a sys- to the equation of the System (3) is considered. Card 5/7 31333 S/f569161/001/000/018/019 Some problems in... D2-14/D304 Let t m t i be the time moments when the trajectory which corresponds to the periodic solution cuts the discontinuity surface. In order to apply Lyapunov~s theorem, the equations of linear approximation are set ups .7 'a fi " A ii 6 x (i 112soqn) 9 (7) -J Nk ;,. [C 2(t) supplemented by the linear "discontinuity conditions"s + 1" + h~ ~x ~k k k where Card 6/7 Some problems in*.. ar .4 hi 3 t 31333 S/ti69/61/0,01/000/018/019 B274/D304 The authors studied the appearance of atable-equilibrium points on the discontinuity surface for system (3). Three theorems are formulated for the special case when the manifolds r+ and r- coincide vithout being contigmous to the slip region. These theorems involve the stability con- ditions for the special case. A discussion follovede There are 6 figures and 20 referencess 19 Soviet-bloc and I non-Soviet-bloc. Card ",r/7 F-VI /L AIMRMAN M A. and GAMAKUR "Problem of absolute stability of controlled systems in the list of vorY.5" Report presented at the Conference on App7Aed Stability-of-Motion 7heory and Analytical Yechwics, Kazan Aviation Institute, 6-8 December lq52 AM4016855 BOOK EXPIDITATICN S/ Ayzerman, Mark Arcnovich; GantmAher, Feliks Ruvimovich Absolute stability of control systems (Absolyutnk7i'V~viostl reguliruyemy'VA i sistem) Moscow, Izd-vo AN SSSRj 63, 0136 ps illusso biblio., 6000 copies printed. (At head of title: Akademiya nauk SSSR. Institut avtanatiki i telemewmiki.) TOPIC TAGS: automatic control, absolute stability, ccntrol system absolute stability, frequerx,.y analysis of control, Lyapunov method, direct method, Popov criterion, Wrlye resolvent equation method', PURPOSE AND COVERAGE: This book is devoted to a new approach to the theory of autanatic control and its absolute stabilitys initiated by the Ruvanian scientist V. M. Popov, and cenuins a systematic exposition of the main results* along with the point of view of the authoirs themselves regarding the present status of the preblem. 7he book is intended fcv a large group of specialists interested in stability, and the mathusatica3 approach is tw4iftL-e somewhat r implified. L~11598-63,- EIWT(d)/BDS AFFTC/APGC/ASD Pg-4/Pk-4/P.,'1-4 ~"I/Pq_4 inc(C)AC ACCESSION NR: AP3001082 S/0103/63/024/006/073210737 r AUTHOR: Ayzerman, M.'A. (Moscow); Gantmakher, 1'. R. (Moscow), On critical caBes'-in the theory of absolute stabilitY f co tvoi d SOURCE: Avtomat-i~a i ielemekhanika, v. 24, no.,6, 1963, :732.ri 7 TOPIC TAGS: control,system, absolute stabilityt critical casejl limiting stability,'Z~- control system stability ABSTRACT: -Popov's criteria of absolute (global) stability are~,'applied to a control' system described by the equation dx Ax + bya.: dt where y are column:vectorg and cl is a:row voctor; A is a cbnstaTit:!squmrc matrix, all the digen-values of which are locatod on the left hand a i the:: imaginary axes; and Y(C;) is a continuous scalar:function satisrying1the conditiOn 0 cp (Cr) cr< k, wbere k is a finite number. These criteri4j: pr6viously apOlied, Card Y -63 11598 ACCESSION N~: AP3001082 arrowLn own 'to noncritical cases, are realized here for all critical case's by im the class of characteristic functi6na y (p (0 by inequality o k, (2) g ra;l criie~rion ibsolute :where Z is an arbitrarily small positive number. :,The, ene of ;stability is formulated in'the following theorem: For the Asoiutle stability :,of ;system (1) in any critical case when Qr) satisfies inequality (2!),* it is sufficient :to satisfy the Popov inequality -Re(I + NO w4w) + llx,~ 0 ,for any finite real q and for all real W and to satisfy them condition of "limiting' stability," i.e to make stable "the 'linear system+ derived from (1) at, y E;Olfor 'any small E; Necessary.*4nd sufficient conditiaiis which:~the f ie4ue),Lty ...I, -characteristic- W(iW) must satisfy to secure the I'limiting si~b'ilityW of' t lineiari a e a. r MA k (k+e ark robv a Card GANTMAKIIER, V.F.-;.. KANER, E.A. Dimensional effect in the presence of a drift of electrons inside a metal. Zhur. eksp. i teor. fiz. 45 no.5:1430-1444 N 163. (MIRA 17t1) 1. Institut fizicheskikh problem AN SSSR i Institut radiofiziki i elektroniki AN UkrSSR. :A ETTER, I" ..R . (i,IOSCO!.:) ; YA I, V, .,*I. ~ Lei I-` zIL-rnd ) : TIAbsolute stability of non-linear controls." report presented at the 2nd All-Union Congress on Thect-etical and Applied I M echanics, Moscow, 29 Jan - 5 Feb 64. GANTMAK-TMER,-V.-.-F.; SHARVIN, Yu. V. "Temperature dependence of the electron mean free path in tin at liquid helium temperature." 1 report presented at the gth Intl Conf on Low Temperature PhIj-sics, Columbus, Ohio, 31 Aug-4 Sep 64. Inst for Physical Problems, AS USSR. VASILIYEV, A.N., starshiy nauchnyy sotrudnik; Priniml uchastiyot GANTMAKHER, M.I.) mladahiy naucbW sotrudnik Economic efficiency of the use of the newest loom types in the linen industry. Tekst.prom. 22 no.11:43-46 N 162. (MIRA 15:11) 1. TSentrallnyy nauchno-issladovatellskiy inatitut lubyanykh iolokon (TSKIILV) (for Vasillyev). (Loons) 83582 S/056/60/0313/005/015/050 140 v#3 B006/BO70 AUTHORS: Sharvin, Yu. ., Gantmakher, V. F. TITLEt Anisotropy of Surface TensionAat the Interface Between the ~X Superconductin6 and the Normal Phases of Tin PERIODICAL: Zhurnal eksperimen,,allnoy i teoreticheskoy fizikl., 1960, Vol. 38, No. 5, PP- 1456-1470 TEXT: The present paper is a detailed report on the determination of the anisotropy ib of surface tension at the interface between the super- conducting (s) and the normal (n) phases of tin, using two methods that give directly independent values for A. 6 has the dimension of a length, and is related to the free surface energy 6' no by the relation d, 'AH2 /8tr. The difficulties in the experimental determination ofj~ ns 0 are discussed in the introduction. Then, the first method is described. It is based on an analysis of the structure of the intermediate state on samples with different brystalline orientations, the analysis being made with the help of ferromagnetic powder. The apparatus used is schematically Card 1/3 83582 Anisotropy of Surface Tension at the Interface 8/056/60/038/005/015/050 Between the Superconducting and the Normal B006/BO70 Phases of Tin shown in Fig. 1. The results of the method, called "the method of frozen flux" and described in detail, are separately discussed for the individual samples. Figs- 4-7 reproduce photographs of the structures of the inter- mediate stage in a field of view 1.4 cm in diameter; the white regions are superconducting, the arrows show the projection of the crystallo- graphic axis onto the surface of the sample. The numbers of the samples and the temperatures are also given. Figs. 8-10 and '13-15 give the cor- responding polar diagrams. The second method is based on the measurement of the moments of force acting on spherical samples in a magnetic field. This method is called the "method of torsion balance", and is also described in detail. Due to the anisotropy, the free energy of the sample depends on the orientation of the magnetic field relative to the crystal- lographic axes of the sample. The sample is suspended by an elastic thread in such a way that in the state of equilibrium the moment tit - -aF/11111L may be determined from the angle of rotationo4 in a horizontal magnetic field; A is calculated from M. Densities, impurity concentrations, and the momentYA of nine samples are given in Table 1.. Figs,. 18-21 show the angular dependence of the moments m (m - 8,TM,/H2V, V - sample volume) for different Card 2/3 83582 Anisotropy of Surface Tension at the Interface S/'056/60/038/005/015/050 Between the Superconducting and the Normal B006/BO70 Phases of Tin axes of suspension (axes of rotation). The f-values measured in the various positions (f is the free energy divided by VH2/81r),j ml and c max ,&m are given in Table 2. The results relating to the dependence of surface tension on the direction of the normal to the interface, the order of absolute magnitude of this affect, and its temperature dependence are discussed in detail. Finallyq VAI the results of the two methods are compared with each other as well as with the results of the theory. P. A. Bezuglyy, X. N. Bogolyubov, V. L. Ginzburg, and L. D. Landau are mentionea7ffi-this connection. The authors thank Academician P.L.Kapitsa for his interest, and A.-I. Shallnikov for discussions. There are 21 figures, 2 tables, and 21 refer~n-cesz 15 Soviet, 3 US, and 3 British. ASSOCIATION: InStitUt f12icheskikh problem Akademii nauk SSSR (Institute ;r --- of Physical Problems of the Academy of Sciences U SR) SUBMITTED: December 31, 1959 Card 3/3 GANTWMM, v.r.; suRviN, Yuev- C, Nonmonotonous dependency of the surface impedance of tin on the magnetic field at a frequency of 1.9 me. Zhur. eksp. i teor. fiz. 39 no.2:512-513 Ag 16o., (MIRA 13:9) 1. Institut fizicheskikh problem Akademii nauk SSSR. (Tin) (Metals at low temperatures-Xlectric properties) 86896 4- 10 (11!~gl Ile- 0//,/.9 S) S/056/60/039/005/012/051 B029/BO77 AUTHORS: Sharvin, Yu. V., Gantmakher. V. F- TITLEi The Depth of Penetration of a Magnetic Field Into a Superconductor as a Function of the Magnetic Field Strength PERIODICAL: Zhurnal eksperimentallnoy'i teoretioheskoy fiziki, 1960, Vol. 39, No- 501), pp. 1242-1250 TEXT: So far, the intensity and characteristic of nonlinear effects in real superconductors has not been clarified by experimest and theory. The theory of V. L. Ginzburg and L. D. Landau furnishes the following expressions for a temperature range close to T X(?, + 2 F2 I f2 / eef f 2 8(X+ y-2)2 P W ~ c (0)'; Abb rRing to L. P. Gorlkov (Ref. 2), e eff has to be twic6 the charge of electrons in order to agree with modern superconductor theories, and the range of application of the above relations has to be limited, too.. Evidently, Card 1/4 86896 The Depth of Penetration of a Magnetic Field Into S/056/60/039/005/012/051 a Superconductor as a Function of the Magnetic B029/BO77 Field Strength no investigations have been made so far for ranges where the theories of Ginzburg and Landau do not apply. To clarify several discrepancies, the authors studied many specimens, employing.*,jke more accurate radar- frequency method. A. A. Abrikosov, L. P.GcllWov, and I, M. Khalatnikov (Ref. 12) developed a method for a theorJiTal estimation at limited frequencies. On the basis of the experimental data, the authors selected an operating frequency of 2 megacycles. The following part of this paper deals with the measuring methods, the measuring instruments and their calibration, the necessary control tests, and the evaluation of the results. Superconductivity vanishes at the sharp bend of the curve Afj(H); Af, denotes the frequency shift of the signal of the first generator. Sometimes this superconductivity vanishes at a field strength greater than H In another specimen the dependence of the effective increment Aeff - (dr/dfl)bf, of h - Ho/Hc was' nearly parabolic. The rapid increase of o( at T-4Tcseems to be caused by secondary effects, The following expression was found for the transverse f~eldi Card 2/4 86896 The Depth of Penetration of a Magnetic Field Into S/056/60/039/005/012/051, a Superconductor as a Function of the.Magnetic B029/BO77 Tield Strength h 2 h4 );. h i + a P 1 .1 denotes the ratio of the strength of the external field to that where the specimen is no longer superconducting, Other specimens showed considerable deviations of the curves A (h2) from 2 eff I linearity at small values of h 1 T C found in this investigation are smaller than the values calculated by Ginzburg and Landau from the penetration depth, The theoretical value of F, 4-5-lo-4, agrees with the experimental value. The values for ae are two to three times greater than the one determined by M1. Spiewak (Ref.19)n It would be interesting to study the surface impedance of superconductors as a function of field strength at relatively low frequencies (106-109cyclE). Academician P., L. Kapitsa and A. I. Shallnikov are thanked for their Card 3/4 The Depth of Penetration of a Magnetic Field Into S/1056/60/039/005/0'2/051 a Superconductor as a Function of the Magnetic B029/,aO77 Field Strength interest and for discussing the resultq. There are 6 figures, 1 table, and 19 references: 11 Soviet, 3 US, and 5 British., . ASSOCIATION: Institut fizicheakikh problem Akademii nauk SSSR (Institute of Physical Problems, Academy of Sciences USSR) SUBMITTEDs July 15, 1960 Card 4/4 S/056/62/042/005/046/050 B108/B136 AUTHOA: Gantmakher V. P. TITL-'-': A method of measuring the momentum of electrons in a metal Zhurnal eksperimentallnoy i teoretichoskoy.fiziki, Y. 42, no. 5, 19062, 1416-1418 TZ',,"'T: A constant magnetic field causes t'he electrons on a spiral path to penetrate into the metal beyond the skin depth. If the size of the soeci.men is equal to the diameter of the electron orbit, this will cause scat'-erin '- of the electrons from the crystal boundaries. The diameter depends on the field strength. This kind of effect becomes evident in the behavior of the impedance. Experiments were made with single-crystal tin plates with an electron free path of 1- 3-10- 1 om at helium temperatures. The variation in frequency (,./10 6 cps) with variation in ma6netic field strength owing to the specimen-induced variation in the reactance of the oscillatory circuit was measured by a modulation method. 5.7-10 20 g-cm/sec was the value obtained for the orbit Card 1/2 S/056/62/042/005/046/050 A method of meazuring the momentum ... B106/B138 diameter in momentum space. This method can also be used to study the Ferm.i surfaces of -metals. . There is 1 figure . J, ASSOCIATION: Institut fizicheskikh problem Akademii nauk SSSR (Institute of Physical Problems of the Academy of Sciences USSR) SUB,i!,1TTED:' March 12, 1962 Card 2/2 3 96-f 8 S/056/62/043/001/052/056. B102/B104 AIMOR: -Gantmakhdr, V. P. TITLE: A size effect in metal with multiple magnetic fields. X,Z'.-UODICAL: Zhurnal eksperimentallnoy i teoreticheakoy fiziki, v. 43, no. 1M, 1962, 345-347 Anew type of size effect was observed when measuring the field dependence of the surface i-;pedance of tin at helium~temparaturen, using .7 frequencies of 1-5 i4c. The measurements were made with a highly pure V single crystal (,-10-4tA impurities) cut as a plate perpendicular to the 10dI a~:is, thickness d - 0.39 mm; the electron mean free path was (1-3)-10-lcm, the skin depth at 1-5 Mc was 10-4 cm. At a field 11 0 - 2cp/ed half width of extreme electron orbit in the momentum spacep perpendicular to the -2 direction and normal to the surface) the curve X(H) has a singularity (Gantmakher, ZhETF, 42, 1416, 1962). Such sin-ul~rities were now found to arise also at nH (measured up to n-5) 0 0 Card 1/2 V / f S/056/62/043/001/052/056 A size effect in metal with multiple ... B102/B104 %vhen the plate thickness equals 2np. This is ascribed to the fact, that n.ear the extreme cross sections of the Fermi surface (i. e. for extreme widths of the electron trajectories in the plate) the electron concentration is greatly increased, and likewise the current density at this depth (2p). There are 2 figures. ASSOCIATION: Institut fizicheskikh problem Akademii nauk SSSR (Institute of Physical Problems of the Academy of Sciences USSR) SUB'-IiITT.i~D: May 18, 1962 Card 2/2 SHARVIN, Yu.V.;,GANTMAKHERp V.F. Growing metal Ringle cryBtals in optically polished molds. Prib. i tekh. eksp. 8 no.6tl65-167 N-D 163. (MIRA 17:6) 1. Institut fizicheskikh problem AN SSSR. L 17610-63 EW(1)IEPF(n)-21EWP(q)IEWr(m)IFCC(v)IBD51bli.5(s).~- AFFTC/ASD/ f~~ Ptf-4/Pt-4 WW1JD S/056/6.3/04-4/003/0~6/053 AMOE: TITIZ: Investigation of the Parml surface of tin byj~the m"tza effect. PBRIODICAL: Zhurnal elmperimentallnoy I tekhnieheskoy f#11ci, v. 44, no. 1~ 1963, 811-822 TEXT: The size effect during measurements of surface resistance ~Z R + ix of a! metal in a magnetic field at not too high radio frequenciesl is a ~:rwv conveniorit method for the study of Fermi surfaces described by the aut)ior in. an earlier, papor (Ref. 1: ZhETFI? 42, 1416,, 1962). This paper contains restate of the observsd size effect during surface resistance m9aeuremont. In tin at'helikin temperatures Sad friquencies between I and 5 Mo/s, and presents detailed date. about the sizea:of ', extremal electron orbits in moment= space with magnetic f Ilolds 3,y1x1g in the 1 [100-1 and IhOj7 planes. The article concludes with a thorough ova''luati-on of the results, their comparison with the results of other authors, and witl~ the Incdel of aaost! free electrons. However, more information Is still needed beforo: final con~lusldns can! be reached. There are 13 figures and 1 table. Card 1/2 GANTXAMR,, VSF. Studying the Fermi surface of tin with the aid of the dimensional effect. Zhur. eksp. i teor. fiz. 41f no.3%811422 Mz '63. (HIPA 16:3) I* Institut fizicheskikh problem AN SSSR. - (Fermi surfaces) (Tin) ACCESSION NR: AP4042563 S/'0056A4/04G/006/2028/2034 AUTHOR:- dantmakher, V. F. TITLE: Concerning the Fermi surface of tin SOURCE: Zh. eksper. i teor. fiz., v. 46, no. 6, 1964, 2028-2034 TOPIC TAGS: tin, Fermi surface, free electron, electron orbit ABSTRACT: Continuing an earlier investigation (ZhETF, v. 44, 811, 1963), the dimensional effect is used to study the extremal electron- ic orbits of a tin specimen in the (001) plane, with the magnetic field lying in the (001) plane. The installation used was the same as in the earlier investigation. The results show the following to, exist in tin: an open surface very similar to the almost free elec- ..tron model, a closed surface*whose dimensions provide a basis for assuming it to correspond to the surface of zone Q of the model, a surface corresponding to the closed surface'obtained in the.earlier Caid 1/2 'ACCESSION NR; AP4042563 :investigation, and a complicated open surface whose*det.ailed struc- has not yet been ascertained. It is pointed out that the data admit of ambiguous interpretations and that information on the-ex- tremal orbits of the three principal crystallographic planes is in- addquate for the complete determination of all the Fermi surfaces. "Thb author thanks Yu. Shavrin for a detailed description of the results." Orig. art. has: 5 figures. ASSOCIATION: Institut fizicheskikh probiem Akademii nauk SSSR (In--; stitute of Physics Problems, Academy of Sciences SSSR) SUBMITTED: 22Jan62 DATE ACQ: ENCL: -00 SUB CODE: UP, SS NR REF SOV: 008 OTHER: 003 Car~ 2/2 I 'Y" .. 1- . i ki ti~ I%: n K-;* ~;l , jj,.j lr~ i F~rinL (if t'rl- " . 1. . ip Q'I_ 1. lnstivot fizlchf-,-7~!kh problem AN "T:SR. (111 RA 17; L 22574-65 ACCESSION VR: AP5001835 s/0 AV64 L/2LIL5 P. AUTHOR: -Gantmakher, V. F.; Kryl2v ~tlined m84 i!tici TITLE- Size effect in indium on helical trajectories~Ab im 14 n effect 8(7jRCEt Murnal eksparimentallnoy I taormtic~mxxo~ ri 4~9 ii, Ij-7; ho. 2111-2115 single crystals skin effect., Fermi I Airf :e' elec TOPIC TAGS: indium tr6Wtra;,- jectory ABSTRACT: The size eftect at radio frequencies Wu~ obicil rved indium single crystals~'~ih the experimental-tet- ibe 'Abyi"4t,6tn=~'-1 ~!r earlier (ZhLU,v. 44, 811, 1963). The measurei~ent wer...~'xaadq 1A~6 1-3K app~rox- fdiiks imatelY 3 Mcpa The s=ples were in the form.o "Ama I i li~iameter 1~ 'ad d,.4-. 0.5 = thick. The angle between the direction of the Vul I Vibld arvi itbe !Sur- Oeti face of the sa=.le was reguUted by.tilting the Devar. ra 14tki~, +o! the I ~,'trdl- magnet. The size effect itself, and the splitting of t~t~ miz6l-ei.Vect, 1~12s` lc~re observed for several samples with different orientutioiali.' Thii iplitting' ~of the Card 1/2 L 22574-i-6,9 !:,ACCESSION NR,: -AP5061835 liries-Vhen the-field i9 -inclined ieviral 44g~e ~sl' to~ !U41 i plained as being due to the drifting, of eli~irobi im 4 c:ross sections of the Fermi surf e 'in'a.direction ac of the sample, thus allowing theseelectron a to. ~ pen~.6ii- skin layer on one side of the sample to the 'skin layer'61 splitting of the size-effect linisby inclinati6n of.th4 possible to estimate the mean free path of the indi~idujiJ same manner as for the electrons near the limiting ~oibts. Kimer, ZbETF v. 45, 1430* 1963), and to differentjate,bql central orbits; thus allowing the shape of the Fermi suid r The autho a thank Academician P. L.1,qi~itsa for affordir the work at the Institute of PhysicLal Problems, Ac~41 1C so Yu. V. Shavrin for a detailed diSCUSsion of the tesWA 4.:figures am 3 formul". AS=IATION: Institut fizicheakikh problez Akademii n"I P~Meical Problems, Ac~Ld~ of Sciences, S5SRjj_X astitut1i A'Aademii nauk SSSR (Institute of Adi -.SUMWXTED: 28ju164 EML.- , 00 NO M? SOV: 40rj=;~4, Oa Card 2/2 1;: SS NP!: 31721 1 529-5k W/EP -65 MT(d)/9WT(l)/EWT(m)/9NP FW Pr-4/Pu.4 IJ,P(,c;) 0'/ ACCESSION Mt AP5010501 6/611 AMOR3 intmakher, V# TITIZ I Tex erature dependence of the mean tro's *1~~ "of eledt. ws:~ b~ltjja!: t!Reraturas: ~j 1 ii TI 48 SMW.Es Murnal eksperimental'aar i td"etlch4ikadr MAki io:! I ~pb 1 1080 077- et, i~t 1!3;00t, a' TOPIC TAGSt tin, electron mean free pathp Feriai OUT phon-on scattering,, low temperature researeb ABSTRAM 7be temperature dependence of-tte amplitude ~or it 441 i Off~ot vt!is imealw: ured, at the limiting points in 'tin for the purpos.t ~ot t N ts Ot ~Oiljtd dat)'sj 6%i the mean free path of the electrons at, low temper4urei. pl~.' 1 pr6 eitursi,useA Its, that, proposed by one of the authors earlier (GaA*&khe4.,.- iftil 1 E. KiMr, 2;' Mr If*- :45p 1430, 1963) and based on the measurement of the relatil-01', i~tonslty i :1 Uno sizt! effect, as described in another paper, (GoatmaAerp VOM F: V. oil., 1J63). The measured size-effect Nas found to incroaae l1ke the 3..44~!Ip4wei;~r the teurpera-' ture., vhich is close to the cubic dependeuce e'xvodted fro1w ~11~e Bi JcOx Ueoryi, Thd effective mean free path betweea two elementary acts of lutil-rtetil'in! vith jbt~001% 1/12 !d. jBit MR VOUH=Ma~dki r-L 520,54-6.5 ACCEMION RR: AP5010561 V. for,electrons lw,~ I no' vas determined from the experimental data gated point on the Fermi surface, and folindto'bt of thl6'6rA1' ii i-if e0ereJ.' ejit~'- meters at 2K. 7be results show that in tdation: t9, the I U!iels iihosii 1 j,'kelisiti changes by one order of magnitude ia thelavest"igated ra,44;0 .~Ite~jj i:jla~lwia b Ott -temperature-indepen is also a line whoge amplitude in dept 0 n u r perimental error. This line corresponds to tho extremal U,~J.-4!tozj: !'16vi#AOP;jj Hiol" - 1. u -16 1 cylinder in the fourth zone of the Fermi surface' or: the ! tliii i E ~,P,6 14 the - (10. Y plane. This absence of temperat-are dependence is MtrUvttiii 1~ ~4 t~e;: nario' L shape of the Investigated part of the Feml.avxfta*'~ but, wt iq ALaiit.' 'i"I'vo ~'-Xplon~xtla 2~ 4 1, is found for this connection. "The siftors thwk L FA 4 f6l iatoxest -b vork, and M. Ya. Azbell and A. X# ShWnikov for a ego Orig._ art. Fmot ;titixte or-001io, ASSOCUTIONs Institut fiziki tvardogo, tela, Akideali. nauklOOR State Physics, Acaderg of Science SWO SUBX=t 25ituw64 as EXCLs 00 NR Ra SOV: 006 OMORt 001 I Card ?/2 L60349-65 EW a ACMION WR: AP50165hi 3D XT AUMR: Gantuakhers V. F. ~~er~ gill, *I TrMt Radio-frequeney size effectln a am& 1e face of a metal SOUPOE: Zhurnal eksperimentallnoy i teoreticheskoy:fW 1572-1582 TOPIC TAGS. size effectp Fermi ourfacej tihp -4lectron 1 lation;- cyclotron frequency ABSTRACT: 7be authors investlgated.expej~_ feet, due to the motion of ineffec _tAy field perpendicular to the surface, of the4mmpile. lo oscillations observed in the static conduidti-wity~ ot wq~~ is varied. The theoretical analysis Is based on a ideitdi tion of an electramngnetic field in the a! e'occu~ied.;l pac ssumptions concerning the nature of the Femi ffurface" based oh a ariWation procedure for meoisuringUe deiiiiil~l of the sdrface impedance of the tallic ida~uple on the 'in me the authors earlier (MMF 45) 14-30 1963) Tha risuliii 1/3 A: ~T -A ie/bw I 1. tol _F ~p V;t! 48,! tho. 6i, 1961~f lojeci oi~,. vemg;ee Iscil- I I v ia x1ly a no. It., 81 ;e- e etic ;61 ttlated in I me~oi Teat.- U 4W~oii t. to 1:the ~ 1-J lic ~ ijit44 whenj the ffeld d.natJ h o# qi~ t e ' strLbu- ~.thd :und'jaa *: -ce.-tal he Mtet"L stuly wa le.~nt~ Mae I -tii",him,ir4gLkary,partl3.,i 0 4 4,,Mn e t i)ed** M; the ohaiii It 1~ ion! of- A. the ineffective electrons proftcoo 4mewdy doxw 11i wid this in -turn produces bVedence: osoilUtions M oscillations are periodic In a straight fIe1d4 'This peiH i extrP-1 values of the electron d1splacem#nt 4aong,tho~ji cyclotron period. Two types of eleictron tra iem 1i Jector limiting po:Lmta aM helical trajectoriesp Jare;: msideiiyl WCAre, er oscillations. The experInants p foLited. i6n tin 01i I or at field directions close to thmt of the [1W WIN Wet the oscillations were periodle i"h*lstimi ft pendent of the temperature and frequanarp,but'Am 1 41 SmreL types. a a thielmeas of the oad i0m ample. Jmterpreted on the baais of the propoized thear, Altkm gives ia principle the am tuftwtion m% tbe; eleotrtrA i the Static COOdUCtiVity' 1A 4 nOXTAM.1, MPdUO lield;] tho Is considered by the authors -to I* V"fereibls~ ~ 0*6. it 0 tions of tbstl alltle cocdm*tWty~ sbouU Ocrm4e r*pi flado "The authord tbank P61LO., I ....... Milpitas, tor experimental, pert he "rk at institut twel jig the ftelas Problew)'AN 6892# sjA 11g, V, Marvin 6V 46 4 of t j~laiI4 -it 0: m tal !;i!'fiu,!Ld I:n Wlt: 17- rhe- the'~~ the Log ;J: Llar tbtai 2-10 nde- 40,the il:, ~i - b61rg h ITect Littlims of 1, le Otte N4 pa rans- o% ~81 Lute, I-. j : I I I; II : !, . ~ti-: 1,1j: L 8875-66 E'dr (m)/E'dP W/MiNt _1JP(0 JD ACC NRi AP5026594 SOURCE CODE: _6R-/oo.,)6/-6-5/6 qprd /1054/1061,. W AUTHOR: Gantmakher, V. F.; Krylov, P. 3: ORG: Institute of Solid State Physics. Academy of Sciences.SSSR (Institut Piziti tverdogo tela Akademii nauk SSSR); Lnstitute of Physical Proble . c~Ld f Sciences -.!LILL _~W SSSR (Institut fizicheskikh problem Akademii nauk SSSR) TITLE: Radio-frequency size effect in indium SOURCE: Zhurnal eksperimentallnoy I teoreticheskoy fiziki, V. 49, no. 4, i965,~ 1054-1o67 TOPIC TAGS: semiconductor, Fermi surface, indium, free electron model 44A41-j ABSTRACT: The Fermi surface in In Is investigated by the radio-frequency size effect technique at a frequency of 3 Mc/s. Identification of th6experimental cr~oqs sec- tions was made using the dependence of the size effect lines on'the inclination of the magnetic field relative to the sample's surface. The compllix~shape of! the Isoen- ergetic surface in the second band resulted in the appearance at a number at sike effect lines due to the presence of breaks in the electron trajdciories in 4 magnetic field. These lines are not related to the electromagnetic field bursts within the metal but to less notable features of the field distribution between the Vursta4 The set of linen associated with the Fermi surface of thelsecond band confirms the fact that this gurface is very similar to that predicted by the almost free electron model. -Card, F111 L 8875-66 ACC NRt AP5026594 No lines have been observed which would indicate that the Fermi~surface may'be open. It also follows from the experimental data that the Fermi 4urface in the third ienergy band consists of tubes connected into rings, the axes of*ilie tubet; being oriented along (110). The shape.of the central cross section of th6b tube-produced * inter-.- section with a plane perpendicular to the tube axis was de termined by USiUg!Beveral s;%mples with different directions of the normals. No lines have been observed which would indicate the existence of tubes with axes parallel.tb (101). Orig. art. has: [CS) 14 figures. SUB COM A01 MMM DATE: 21may65/ ORIG REF: On/ Gq~: nEF.- oW ATD PPXSS: Cmd 2 /2 A-4 GANIIIAMER, V. F. "Free" electrons in metals. Pr--roda 54 no.7.-11-23 J2 16'j. 01111RA 18:7) 1. Institut fiziki tverdogo tela Ali SSSR, Moskva. GANIW,J~HERJO V.F. Surface impedance in Bi at frequencies of I - 10 14c in weak magnetic fields. Pis'. v red. Zhur. eksper. i teoret. fiz. 2 no.12:557-562 D 165. (MIFLA 19: 1) 1. Institut fiziki tverdogo tela AN SSSR i Inistitut fizicheakikh problem AN BSSR. Submitted Nov. 9, 1965. L 02194-67 - E-,NT(-.n)AwPC0/E.T1. _ TJ-P(.CJ'" _JD ',cc NR: AP6032469 SOURCE CODE., IJR/0056/66/051/003/0740/0745 4? AUTHOR.-' Krylov, 1. P.; Gantmakher, V. F. ORG: Institute of Physical Problems, Academy of Sciences SSSR Onstitut fizicheskikh problem Akademil nauk SSSR); Institute of Solid State Physics, Academy of Sciences SSSR.(InBtitut fiziki tverdogo tela Akademfi naulk SSSR) TITLE : Radio-frequency size effect at the limiting point In Indium SOURCE: Zhurnal eksperimentaltnoy I teoretichesitoy nziki, v. 51, no. 3, 1966, 740-745 TOPIC TAGS- Indium, magnetic field, frequency size effect, Fermi surface curvature, e;eetron model, almost free electron, electron mean free path ABSTRACT: The curvature of the Fermi surface of indlum near the [111] direc- tion was measured by mearm of the radio frequency size effect at the limiting point in an Inclined magnetic field. The experimental value of the curvature is identical with that yielded by the almost-free electron model. A study of amplitude depend- ence of the size effect lines showed the electron mean free path to be a function Card 1/ 2 M L 02194-67 of temperature. The thickness of the skin layer was determined on the basis of size effect line width, and on Its dependence upon the frequency. The authors thank Academician P. L~ Kapitsa for making their work possible, and Yu. V. Sharvin for discussing results of their research. Orig. art. has: 5 figures,. and 2 formulas. [Based on authors' abstract) SUB CODE: 20/ SUBM DATE: 23M&r66/ ORIG REF: 009/ OTHREF; 003/ Card ~ 2/2- ACC Ma A?7003535 SOURCE CODE: UR/0,746/6 7/00 5/0o 1/0017/0020 AUMOR: Gantmakher, V.,F.; Doleopolovi V. T. ORUI: institute of Physics Problems, Acadeow of Sciences SSSR (Institut fizicheskikh problem Akademii nauk SSSR) T'ITU:: Excitation of standing sound waves in Bi by an electromagnetic method SOURICE: Zhurnal eksperimertallnoy i'teoreticheskoy fiziki. Pis'ma v redaktsiyu. Prilozheniye, v. 5,. no. 1, 1967, 17-20 TOPIC TAGS: bismuth, sound propagation, low temperature research, surface property, skin effect ABSTRACT: The authors report here the results of preliminary experiments in which they observed excitation of sound in Bi by an electromagnetic wave incident on its surf-ace. Single-crystal BI samples in the form of discs mere placed inside an in- ductance coil, with which they were cooled to helium temperatures. The coil together with the sample served as the inductance of the tank circuit of an rf oscillator, which included a blocked semiconductor diode. The dependence of the barrier capaci- tance of its p-n junction on the blocking voltage made it possible tovary smoothly the oscillation frequency, and also to modulate it sinusoidall~y at a frequency (P - 19 cps. The oscillator output was detected and fed to a narrow-band amplifier with syn- chrcnous detector, tuned to double the moduletion frequency 2cp. As a rtsult, the 2p/af2 out;ut signal was proportional to a (H - real part of Bi swVle surface imped- 1/2 ACC NRz AP7003535 ance). 71he dependence of Z'Wa& on f uas investigated in the interval 1 - 10 Yjiz. In magnetic fields on the Cirder of 10 - 100 Oe and parallel to the coil axis, a group of equidistant peaks appeared on the a2)Vaf2 curves, separated by frequency intervals larger by one order of magrLitude than the width of each individual group. The mag- nitude and direction of thc! magnetic field affected only the amplitudes of the peaks, tl.e positions of which reme.ined; unchanged. Arguments are presented to show that the observed excitation of sound in Bi is due to some specific mechanism, connected with emission of sound as a resUt of large electron drift velocity. It is concluded, however, that further experiments are needed to clarify the sound-excitation mecha- nism. The authors thank Academician P. L. Kapitsa for the opportunity to perform the experiments at the Institute of Mysics Problems, and Yu. V. Sharvin for interest in-the work. Orig. art. has: 2 figurea. SUB CODE: 20/ SUM DAM 100et66/ ORIG IREF: 001/ OTH FV: 003 Card 2/2 L 12071-66 ACC Ul; -'Ap6oo2661 SOVRCE CODE: UR/6366/65/00?1012/05~716 .562 AUTHOR: Gantmakher, V. ORG: Institute of Solid-State PlVrsics, Academy of Sciencem SSSR (Institut fizWn tverdl)go tela Akademii-&~t SSSIQ 611-tute -6-f Academy of Sei- ences SSSR (Institut fiticheskilils problem Akademii nauk S011R) TITIZ: Surface impedance of Bi at 1-1) Me in weak !Aeetic f ie Ids SOURCF.: Zhurnal eksperimeiTtallnoy i teoreticheskoy fiziklio' Pio,lxa v redakbsiyU. Prilozheniyep Y. 20 no. 12., 1,965o 571-552 .TOPIC TAGS: blmnuthp electric impedance, surface property skiri effecti, weak ms - 0 netic field ABSTRACT: In a search f2r I Convincing explanation of the ~~ijtror0g:nonmonot6blc yarl- ation is of the surface Z of a metal with varying magneCic field H1, ~esr: rH - 0, the author ciarried out. experiments on the behavior gif bisIorth single!'crys- talB in weak fields. Bismath discs 18 mm in diameter contmining purities were placed in the coil of a radio-frequency tankcircuit. and vere~~cooled together with the coil to helium temperatures. The experiments -consisted of record- ing 21f/i)H (f - frequency) as a function of H with an autoolktic two-coordin~te plot- ,ter in the maimetic-field renge fr---A 0 to 5 oe. The measuring apiwatus vat de- Ic Ord -1/3 L 12071-66 2661 mc NR: Af6w A k Iscribed by the author earlier (ZbETF V. 44A Z11j, 1!)63). The measures Uken to eliminate 1 oe:, k :the Imfluence of extraneous factors are de- scribed. The results of th-t experiments Aive g,,rounds for assuming that the observed ,nonmonotonicity and the relixted dependence ;on the amplitude of the hf tield are con- :nected with the quasistatic distribution of ,:the mognetic field inside the skin layer. 'The inhomogeneity of the mo4gnetic field in Ahe skin layer greatly complicates the in- itegral relation between the current and the ;electric field in the skin layer. Applica- ition of a sn-11 constant filald shifts the ipicturts of the instantaneous field distri- 'bution in the skin layer, amd this naturally" !should lead to a decrease ia the impedamee. Jf the proposed explanation of the Observed Fig. 1. Depenaence, of the osc4la-tilon correct inprinciple, then frequency on the canwtant. maglittic! similax investigations can yield inform-tion field at diffiorent '"9111tild"S: of tile hf field Card - #3 L 12071-66 ACC NR: AP6002661 ture of the fiel.d in the skin layer. Author istraterul to Aca4einic~ qjj,~he st!rue ~/P.JL. J~Ritza for affording the opportunity to work at the Institute of PhvikB/""' :Problems of the Academy of ;ciqnrcA-WH and to Yu. V. Shai4rn-for a d1scussibn of reaultas Orig, art* han 1 figure. CODIS 20/ MM DATS i OgNov65/ Ub 17 U."37), C, ojz~bo, lo: USSR: 1 A u~ SUBJECT USSR/IWMEMATICS/Differential equations CARD 1/1 PG - 51 AUTHOR GANTMACIMR E.R. AMMAN M.Ae TITLE On an algebraic problem in the theory of automatic control. PERIODICAL Uspeohi mat. Nauk.2L No.19 136-138 (1954) reviewed 511956 The following problem is considereds two real polynomials D1(p) and D2(p) are given. The number of their zeros in each of the four quadrants, on the positive and on the negative semiaxia and in the origin of the coordinated* is known. It is asked for necessary and sufficient conditions for this distribution of zeros such that the polynomial D,(p) + D2(p) satisfies the Hurivitz conditions of stability. Necessary and sufficient conditions are given for a series of special canes. For the general case there are presented only four necessary (but not sufficient) conditions. J~p Ps,-4/P"-.-7,/Pz. 6/Peb TTVAT ACCESSION NR: AP50.16779 tit, OR Abramoviph,, R. B.; Arinushit n MH A Golod.ovskty I A. Ye.; Zas3.a-Tskiy,, Zhukqv: :Tq, K TITI-v! Aircraft turbodrive. Class 47 Ito 1~1712~h OU,('.E, Byulleten' izbbreteniy -tov~ i ri S R I ray kh 10, 1.1 VOPIC: TAGS: aircraft turbodrive. constant" T.A.BarRNM An Author Certificate h as beeri Osuoa' for! i the aLr-t.urbLineL:.-st art ing of engineo and toridrivi~g j~ eop! uniL contains an air turbine, m a- C generatbr, Wlitaj7tei~l land m a unguided -Erae-wheeling.cl utel I., F ~c or n reased' cewil 'decrease weight, and to shorten. starting tirie ~'Ale uilit A.I toi-iis drive in the form of two driver torus'dialis in into~L 01 driveo torus disk3 mounted on a fixed ohaft- dild 13 epaj, at6jL unit Is also equipped vith intermediaLe roIlera';vbich ~Sard 1/3 -65 L 57795 I ACCI.;1ISSIoIN AR. A-P5016779 a control de%ict~ these provide interuci. Lori baturevil W1 Mldt~ toruo 1. in transtrif 'Ang rotation frovi the en&-,c~ to Lhe (-611:.Aazj-4 ea~.- traiiii: a differential control macbanism and the geirierattor i4g.:I, Orig. art. han: I :ti [LB igure - ASSOCIAT lid "i!" -i0ii- Organizatsiyo . audarstvainiogo JtcrnLtcta pi 90 A~ T, -te Committee on AvIEtAori Technalogy'll 13 (Organization of th~-, Sta v B SITIMITT'VED: 05may64 ENCII: 01 '000 11111DV 1.N0 M. FSOV: OTHER: 000 if 4 1-4 - J` j if 2Li-- ....... 14 w3 -.3n9 u it GAITKAM L.V. inshener; SHVMDOV,Ye.P., inzhener ~.- IndustrW production of reactivs hydrochloric acid. Khim.prom. no.4:115-117 Ap 147. (MMU 8:12) (Hydrochloric acid) GANTRO. lr.V. , I Designing multieffect evaporators. Xhim.prom. no.3:169-170 Ap-M47 '57. (KW 10: 7) (Braporating appliances) AUTHOR: Gantman, L. V. S07/64-58-5-11/21 TITLE: The Intensification of the Working Plants for the Concentration of Electrolytic Caustic Potash (Intensifikatsiya deystvuyushchikh ustanovok kontsentrirovaniya elektroliticheskogo kaustika) PERIODICAL: Khimicheskaya promyshlennost', 1958, Nr 5, PP- 309 -- 311 (USSR) ABSTRACT: The three-membered evaporation apparatus of the system GNIIKhM is the one most often used in the Soviet factories. Since this apparatus has some deficiencies, and the production of caustics has increased, a new apparatus was constructed in one of the chemical plants which has a much greater output and better economic properties. Besides the author of this article F.T.Bonyuk, L.S.Genin, V.S.Yevdokimova, S.M.Krugly-y, G~V-, Seleznev, I.E.Spektor, P.G.Khain and Sh.S.Shchagoll also partici-, pated in this construction. The paper gives a diagram of this new evaporation apparatus, and from its description it may be seen that in the second stage new apparatus with forced circulation of the solution (after the construction by the NIIkhimmash) were employed. Some changes in the dimensions were made. The Card 1/2 heat transfer coefficient was increased 2-3-fold in the first The Intea-,sification of the Working Plants for the Sov/64-5/8-5-11/21 Concentration of Electrolytic Caustic Potash stage by a proper use of the function of the heat transfer coefficient vs. the temperature difference, while in the second stage it increased 3-4-fold by the above mentioned change. For separating the salt from the liquid mustic potash automatic horizontal centrifuges of the type AGwere used. These centri- 0 fuges were manufactured by the Suuy Factory imeni TJ.V.Frunze (Sumskiy zavod im.I.I.V.Prunze). The --heme elaborated for the plant is automatic in almost all operations, and the author hopes that it will become completely automntic. There are 1 figure, 2 tables, and 5 reference aU of v1d,ch we Sarie4t, 1. Potassiwn carborates-11-1roduction 2. Fvaporat-ors--ConBtr-..~~!t4;-C~~I 3. Evaporators-Applications 4. E%,aporatws--Ope::,et--'on Card 2/2 GANTWT, M.N. Ion-aftlectIve membranes and methods for tnutirw then, 18"1.P0 vodopodg. no.3:210-217 0 59" (MIRA 12:9) (Ion exchange) USKORIN, B.N.; WIRPOVA., N.M.; GANTMAN, M.11,; VOA0110VA, A.I.., red.; VLASOVA, N.A.., tekhn. red-.- - (Ion-exchange membranes and their use] Ionoobmennye membrany ikh primenenie. Moskva, Gos.izd.-vo lit-ry v oblasti atomnoi nauki i tekhnikiy 1961. 162 p. NIRA 14:12) (Ion exchange) 8(l) SOV/107-58-12-42/55 AUTHOR: Gantman,_a.-.. TITLE: VDZh-400 Ferrocarbon Elements (Zhelezo- ugollnyye elementy VDZh-400) PERIODICAL: Radio, 1958, Nr 12, pp 45-46 (USSR) ABSTRACT: The author states that as a result of work carried out by the Vsesoyuznyy nauchno- issledovatellskiy institut istochnikov toka. (All-Union Scientific Research Institute for Sources of Current), a ferrocarbon element has been produced having an alkaline electro- lyte and electrodes made of activated carbon and porous iron which serve a similar pur- pose to cupric oxide elements (MOE) and ele- ments with manganese-air depolarization (MVD), but which do not use non-ferrous metals and other scarce materials. They cLn be used for the filament power supply of the "Rodina", Card 1/4 "Iskra" and "Nov'" battery radio receivers, VDZh-.400 Ferrocarbon Elements SOv/lC7-58-12-42/55 railroad si7,nalling and automatic block sys- tems,telephone lines, lighting etc. The electrical power is produced by the reaction of active porous iron oxidation by the oxygen in the air. The negative electrode of the element is the porous iron (porosity of ?5-.. 80%), the positive one is the air polariza- tion carbon electrode. The composition of this electrode is fully described. The ele- ment is contained in a steel cylindrical con- tainer: its inner construction, main feature of which is the horizontal positioning of the electrodes, is described and illustrated in Figure 1. The horizontal positioning of the electrodes improves the working conditions of the carbon electrode, makes it possible to use pieces of porous iron which have not been specially processed mechanically, and simpli- fies the design. An element ready for work Card 2/4 is shown in Figure 2a and two elements mounted VDZh--400 Perrocarbon Elements SOV/107-58-12-42/55 on top of each other in Figure 2b. The basic features of the element are as follows; diameter 221 mm, height 75 min, weight 5 kgj emf 0.9-1.0 v. normal discharge current 0.5 amps, maximum permissible current 0.8-1.0 amp, capacity with a continuous discharge in- to a resistance of 1.25 ohms u-P to a voltage of 0.5 V is not less than 500 amp-hrs, capa- city with discharges of a lengthy, inter- rupted nature is about 400 amp-hrs. The dis- charge curves of the element when it is under continuous discharge against resistances of 1.25 and 0.8 ohms are shown in Figure 3a and comparative discharge curves of the element with that of the MOE-500 cupric oxide element (curve 2) in Figure 3b. The basic character- istics of the VDZh-400 end RME-500 elements and the IvTVD "Ek-ran" and "Deviz" batteries are Card 3/4 given in the table. The final. conclusions of VDZh-400 Ferrocarbon Elements SOV/107-58-12-42/55 the author are that the VDZh-400 element has the following advantages; it does not use up scarce non-ferrous metals, has a simple desi-n and is very suitable for mass U production. There are 1 schematic diagram, 2 drawings, 2 gra-Dhs and 1 table. Card 4/4 Translation from: Referativnyy zhurnal, Mekhanika, 1957, Nr 1, p 167 (USSR) AUTHOR: Gantman, S . A TITLE: Determination of the Rigidity of the System "Lathe - Product - Instrument" in an Automatic Longitudinal- profile Lathe (Opredeleniye zhestkosti sistemy "stanok - detal' - instrument" avtornata prodol'no-fasonnogo tocheniva) PERIODICAL: Tr. Penzensk. industr. in-ta, 1955, Nr 3, pp 49-60 ABSTRACT: Bibliographic entry 1. Lathes--Stability--Bibliogi-aphy 2. Lathes-Performance Card 1/1 GANTMAN, S.A.; KUZNETSOV, K.A. Selecting the method of machining on automatic turret latnes. Priborostroenie no.10:28-30 0 '57. (MIRA 10:11) (Turning) GANVW, S.A., kand. tekhn. nauk, dotsent Gheqking the precision of adjustment of automatic machine tools. Izv. vys. ucheb. zav.; mashinostr. no-3/4-.155-164 '58. (MIRA 12:5) 1.Penzenskiy industriallny7 inatitut. (Machine tools) 28(5) AUTHORS: -aantman,,-S. A., Candidate of 307/119-59-1-12/20 - - Technic~ I s-clbnoes, Kuznetsov, K. A., Engineer TE,ILE: More Exact Shapes of Turned PartB (Povysheniye tochnosti formy obtachivayemykh detaley) PERIODICAL- Priborostroyaniye, 1959, Nr 1, pp 22-2.3 (USSR) ABSTRACT: The degree of exactitude of the shape of turned parts depends on many factors, above all, however, on the goumetrical accuracy of thelathe. The error of non-parallelil3M Of the axis of the spindle and the axis of the shell of a turret lathe may be reduced for example by applying the cut.ting tool under a certain angle~,~ to tho horizontal. The angle a< can be computed from the 1 � - equationc-(=ar,-tg . are the deviation in the horizontal 4~1 4 2 A2 and vertical plane. In case that the piece to be worked is easily deformable the effect of elastic deformation of the lathe piece*may be eliminated when the tool is applied to an angle c< opposite to the horizontal direction. A corresponding formula is derived for the determination of the angle o