{"id":1574,"date":"2013-03-14T15:26:07","date_gmt":"2013-03-14T11:26:07","guid":{"rendered":"http:\/\/ellphi.lebedev.ru\/?p=1574"},"modified":"2013-04-05T15:14:06","modified_gmt":"2013-04-05T11:14:06","slug":"1991-en","status":"publish","type":"post","link":"http:\/\/preprints.lebedev.ru\/?p=1574","title":{"rendered":"1991 En"},"content":{"rendered":"

V.P. Silin , <\/em> S.A. Uryupin <\/em>
\n\u2116 6<\/strong> ELECTRON HEATING UNDER CYCLOTRON ABSORPTION OF ELECTROMAGNETIC FIELD IN TURBULENT PLASMA
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

There baa been studied the fart heating of electrons in a magnetised plasma with ion-acoustic turbulence under such conditione’ that the firequency of the heating electromagnetic field is comparable with the electron cyclotron one. There bas been investigated the process of rearrangement of initial Maxwellian . elocity distribution into the highly non-equilibrium one caused by non-uniform heating of different electron groups. The absorbed electromagnetic field power has been found as well as its variations with the electron distribution evolution. ---------------------------<\/div>\n<\/p>\n

V.E. Kur»yan <\/em>
\n\u2116 7<\/strong> QUANTUM FIELD THEORY IN DISCRETE SPACE
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

Preprints of the P.N. Lebedev Physical Institute of the Academy of Sciences of the USSR are its independent publications and are issued in the Institute’s following fields of research: — high energy and cosmic ray Physics — optics and spectroscopy — quantum Radiophysics — solid state Physics — cosmophysics — plasma Physics In bibliographical references to the P.N. Lebedev Physical Institute’s preprints we recommend to indicate: the author’s initials and name, preprint number, place of the publication, abbreviation of the Institute-publisher, year of the pub?lication: Example of a bibliographical reference: II Ivanov. Preprint 125, Moscow. RAN, 1986. ---------------------------<\/div>\n<\/p>\n

V.E. Kur»yan <\/em>
\n\u2116 8<\/strong> QUANTUM GRAVITY: NEW APPROACH
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a>
\n|\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

Preprints of the P.N. Lebedev Physical Institute of the Academy of Sciences of the USSR are its independent publications and are issued in the Institutes following fields of research: — high energy and cosmic ray Physics — optics and spectroscopy — quantum Radiophysics — solid state Physics — cosmophysics — plasma Physics In bibliographical references to the P.N. Lebedev Physical Institute’s preprints we recommend to indicate: the author’s initials and name, preprint number, place of the publication, abbreviation of the Institute-publisher, year of the publication: Example of a bibliographical reference: I.I Ivanov. Preprint 125. Moscow, RAN, 1986 ---------------------------<\/div>\n<\/p>\n

V.M. Fyodorov , <\/em> E.. Rasroev , <\/em> Z.. Shakowski <\/em>
\n\u2116 16<\/strong> ON THE MEASUREMENT SYSTEM IN ?DUMAND? PROJEKT
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

The electronic part of measurement system for registration of Cherenkov radiation generated J?y cosmic muons is described. The electronic inside high-pressured containers with photomultipliers. coincidence circuit and microprocessor controller connected through a 5 km long underwater cable to terminal computer can detect muons and transmit data on line. All important parameters of registration and transmission as well as schematic views are presented. ---------------------------<\/div>\n<\/p>\n

M.A. Drobishev , <\/em> A.V. Novikov , <\/em> M.N. Sapoznhnicov <\/em>
\n\u2116 45<\/strong> KINETICS OF PHOTOBURNING 0F PERSISTENT HOLES IN THE ABSORPTION SPECTRA OF MOLECULES IN MATRICES
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

A relation between the homogeneous absorption spectrum of impurity centre and spectrum of the photochemical hole, burnt by monchromatic laser irradiation in the inhomogeneous absorption spectrum, is studied. Analytical calculations of the zero-phonon hole shape evolution during the burning process at any relations between the linewidth of the zero-phonon line and that of the laser are performed. The results of the mo?del calculations are confirmed by our experiments with protoporphyrin dication in an amorphous matrix at liquid helium temperature. ---------------------------<\/div>\n<\/p>\n

N.P. Vagin , <\/em> M.P. Frolov , <\/em> N.N. Yuryshev<\/em>
\n\u2116 46<\/strong> LUMINESCENCE OF THE CHEMICAL SINGLET OXYGEN GENERATOR IN THE VISIBLE AND»NEAR IR SPECTRAL REGIONS
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

It was experimentally shown that the interaction of singlet oxygen containing a small chlorine admixture with the heated metallic surface gives rise to the intensive luminescence. The luminescence spectrum contains two regions lying within the ranges of 650-920 nm and 1070-1305 nm. In each of the regions there is observed a band structure with the characteristic interval around 360 cm-1 . The dependence of the luminescence intensity on the chlorine and singlet oxygen pressure are given. ---------------------------<\/div>\n<\/p>\n

Yu.Yu. Stoilov , <\/em> O.A. Logunov , <\/em> D.A. Nikolaenko , <\/em> A.V. Startsev <\/em>
\n\u2116 52<\/strong> DEVELOPMENT OF DYE LASERS WITH BLEACHIHC WAVE (LBW)
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

LBW are the first condensed state lasers where the restriction on energy and duration of optical exciting pulses are practically removed. This gives an opportunity to create tunable lasers in the visible range with average powers significantly higher than that of any available common dye lasers. Physics principles and current experimental results along with prospects of future LBW development are presented. ---------------------------<\/div>\n<\/p>\n

A.V. Apanasenko , <\/em> T.A. Goncharova , <\/em> A.A. Goryachikh , <\/em> N.A. Dobrotin , <\/em> K.A. Kotelnikov , <\/em> A.G. Martynov , <\/em> N.G. Poluhina , <\/em> S.Y. Shalamova , <\/em> T.S. Zayarnaya , <\/em> V.M. Tvanenko , <\/em> T.N. Kvochkina <\/em>
\n\u2116 63<\/strong> On Hadronic Emission Region Size In Very High Energy Nucleon-Nucleus And Nuoleue-Nuoleue Collision
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

T.I. Raschupkina <\/em>
\n\u2116 67<\/strong> aRADIO TELESCOPES IN THE USSR ( reference data )
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

E.R. Koresheva , <\/em> I.E. Osipov <\/em>
\n\u2116 75<\/strong> THE CRYOTARGET DELIVERY SYSTEMS FOR ICP
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

The cryotarget delivery systems for application In multi-beam Inertial Confinement Fusion (ICP) installations are deve?loping In P.H.bebedev Physical Institute. The systems make It possible to form the quality cryotargets and to Inject them Into a powerful laser focus inside ICP chamber. ---------------------------<\/div>\n<\/p>\n

E.R. Koresheva , <\/em> A.I. Nikitenko , <\/em> I.E. Osipov , <\/em> S.M. Tolokonnikov , <\/em> A.R. Damerell , <\/em> R.W. Wyatt <\/em>
\n\u2116 76<\/strong> THE COMPLEX GRAVITY INJECTION SYSTEM FOR ICP
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

A complex injection system including the gravity injector and the electronic equipment wt created and its operability \u0442\u0435\u0437 confirmed in joint experiments of P.K.Lebsdev Inetitute(USSR) and Itutherford Labcratory(Great Britain), The syetee can be applied to the spherical ICP experiments with gae-filled targo’\u043d \u0430\u0432 well ae with cryogenic targets. ---------------------------<\/div>\n<\/p>\n

V.G. Sharkov , <\/em> G.R. Sharkov <\/em>
\n\u2116 82<\/strong> AN APPROACH TO THE STUDY OF THE COBRELATION EFFECTS IN THE FINITE ENSEMBLES OF POINT OBJECTS
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

New technique, concerning correlation features of finite ensembles of localized objects, is briefly outlined. The technique provides information on all statistically significant patterns of the arrangement of objects. Actual patterns can be localized in the \u043a\u0440\u0430\u0441\u0435, and the description of» varioue hierarchy levels of the space distribution of objects is available. ---------------------------<\/div>\n<\/p>\n

A.A. Aseev , <\/em> V.A. Kozlov , <\/em> K.A. Sokolovsky , <\/em> A.S. Romanyuk , <\/em> A.K. Blik , <\/em> V.M. Kolosov , <\/em> R.N. Krasnokutsky , <\/em> L.L. Kkurchaninov , <\/em> V.I. Romanovsky , <\/em> R.S. Shuvalov , <\/em> E.A. Slobodnyuk , <\/em> V.V. Susbkov<\/em>
\n\u2116 85<\/strong> MULTIPLATE IONIZATION CALORIMETER WITH COMPRESSED
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

The performance of the multipiate ionization calorimeter working with the compressed gas (up to 23 atm) has been studied. A totad width of an electronic signal was 100 net. The intrinsic electromagnetic energy resolution t9J2tt\/fE> was obtained. The radius of an electromagnetic shower at the 9QM level t? 9.3 mm. The agreement of the experimental results -with the Honte-Cario predictions is satisfactory. ---------------------------<\/div>\n<\/p>\n

E.G. Gamaly , <\/em> A.E. Kiselev , <\/em> V.T. Tikhonchuk <\/em>
\n\u2116 89<\/strong> PLASMA HEATING BY ULTRASHORT LASER PULSE IN THE REGIME OF ANOMALOUS SKIN-EFFECT
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

The problem of interaction- of short laser pulse (light frequency \u044b , pulse duration, X < l_\/v; 1 , skin depth, v , ion velocity) with dense (U ?\u0438 ) semi-infinite plasma was solved.We formulated the self-consistent problem of obtaining the electron distribution function and space dependence of electric field in skin layer, and solved the problem for the case of absence of the energy losses from the skin layer. We found self-similar nonstationary electron distribution function and space dependence of electric field in this case, and basing on these solutions, have calculated mean electron energy, absorption coefficient, bremsstrahlung radiation, time dependent skin depth. Finally we discussed the limitations of our theory. ---------------------------<\/div>\n\n\n\n\n O.D. Dalkarov , <\/em> K.V. Protasov <\/em>
\n\u2116 93<\/strong> ELECTROMAGNETIC FORM FACTORS OF HADRONS IN THE TIME-LIKE REGION
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n
Hadron electromagnetic form factor in the time-like region at the boundary of the physical region is considered. The energy behaviour of the form factor is shown to be dominantely determined by the strong hadron-antihadron interaction. The experiments to extract this interaction by using of hadro.i form factor properties are proposed. ---------------------------<\/div>\n<\/p>\n

A.V. Ryzhov , <\/em> A.G. Savinkov <\/em>
\n\u2116 94<\/strong> QUANTUM DYNAMICS ON U(I) MONOPOLE BUNDLES
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

In present paper the analysis on nontrivlal U(l)-bundles connected with magnetic monopole problem Is constructed. The complete set of states on total spaces of principal U( 1 )-bundles, graded by topological number n is obtained. Spectral properties of Hamlltonians of a charge in the field of monopole type connection are examined and a representation in which they aquire a simple form Is found. It is shown that space parity is violated in every sector of the space of states corresponding to the number n * 0. This parity breaking has a topological nature, i.e. it is independent on the choice of connection on the considered bundles ---------------------------<\/div>\n<\/p>\n

A.D. Erlykin <\/em>
\n\u2116 98<\/strong> A REMARK ON ONE OF THE INTERPRETATIONS OF «FLY’S EYE» EXPERIMENT RESULTS.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

It is shown, that the relatively small value of the maximum development depth for EAS. observed by «Ply’s Eye» experiment, cannot be explained by the rise of bar yon abundance among secondary particles with the increasing collision energy. The smaller partial inelasticity coefficient \u041a of nucleons makes the transition of nuclear cascade energy into the electromagnetic com?ponent slower and results in the deeper maximum development depth. ---------------------------<\/div>\n<\/p>\n

V.P. Karasiev <\/em>
\n\u2116 102<\/strong> POLYNOMIAL DEFORMATIONS OP OSCILLATOR ALGEBRAS IN QUANTUM THEORIES WITH INTERNAL SYMMETRIES
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

Extensions of the unitary algebras a(m) by their symmetric and skew-tynimetric teufon ate considered. They are thowa to result in non-qantum (polynomial) deformations of oscillator algebras which are relevant to theories with the internal CB and su(n)-symmetries respectively. Irreducible representations of the algebras obtained in the Fock spaces are found. Some applications of the retslts in quantum optics as well as their generalisations are briefly discussed. ---------------------------<\/div>\n<\/p>\n

R.R. Metsaev <\/em>
\n\u2116 104<\/strong> CONFORMAL INVARIANT AND UNITARY DYNAMICS OF HIGHER MASSLESS SPINS. THE TREE LEVEL ANALYSI8.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

Conformal invariant and unitary dynamics of higher muesfese spins -0,1,2… «o (every spin lies in o(r?)~matrix algebra ) is studieu in the frame-fork light-cone formalism. The expression for the tree level faur?legged amlitude of scattering is obtained. ---------------------------<\/div>\n<\/p>\n

N.V. Anahukova , <\/em> A.I. Golovashkin , <\/em> I.I. Ivanova , <\/em> A.P. Rysakov <\/em>
\n\u2116 109<\/strong> Fhase Transitions and peculiarities of physycal properties in Ba-K-Bi-0 system
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

A.V. Kanaev , <\/em> M.F. Kink , <\/em> R.A. Kink , <\/em> Yu.A. Maksimov , <\/em> L.D. Mikheev , <\/em> H.E. Nidrice , <\/em> V.S. Zuev <\/em>
\n\u2116 119<\/strong> GAS-PHASE XENON AS \u0410 PROMISING ACTIVE MEDIUM FOR EFFICIENT VUV-LASING UNDER OPTICAL PUMI’ING
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

Resulte of the study In the energy relaxation in gas-phase xenon optically excited within the energy region 8.5-10.7 eV are discussed from the point of view of optically pumped Xe2 laser feasibility in VOV region. The results allow one to develop more adequate kinetics scheme of relaxation processes in the gaseous xenon ---------------------------<\/div>\n<\/p>\n

Boris.N. Chichkov , <\/em> Sergey.A. Shumsky , <\/em> Sergey.A. Uryupin <\/em>
\n\u2116 121<\/strong> Nonstationary electron distribution functions in a laser field
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

Time dependent functions giving distributions over instantaneous values of electron momenta and energies in a laser field are derived. These distribution functions are found for arbitrary values of the ratio of the electron thermal velocity to the electron oscillation velocity. They are necessary in studies of laser radiation interaction with plasma, laser plasma X-ray lasers, etc. ---------------------------<\/div>\n<\/p>\n

K.V. Anshukova , <\/em> A.I. Golovashkin , <\/em> A.K. Takhovrebov , <\/em> L.H. Sherikhina , <\/em> L.I. Ivanova , <\/em> A.P. Rusakov <\/em>
\n\u2116 124<\/strong> BEHAVIOR OF HIER-T BE1-x\u043a\u0445\u0432io3 microwave fields
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

Measuremente of the I-‘f oberaotertetios \u043c\u0448!?\u0433 Mioroi?ave radlaties ware perfcrieed on bulk Be.? JC BiO,, it. wae observed thst mlorowave power preBead the critical current and dearc&eed the I-V hysteresis. The first Shapiro step on the J-V charade-rist-is wae observed* Sheee effect \u043e oe&firm that superconducting Be, XJiOj itself is a complex \u042d\u0412-Josepfesen structure with tetag transitions. ---------------------------<\/div>\n<\/p>\n

L.D. Mikheev <\/em>
\n\u2116 125<\/strong> ON THE \u0420OSSI\u0412ITY \u041eF AMPLIFICATION OF A FEMTOSECOND PULSE UP \u0422\u041e THE ENERGYT 1 Kv
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

Optically excited active medium at XeF(A) transition (\u041b, ? 481 nm) is considered \u0413\u0433\u043e\u0448 the viewpoint of its possible application in ultrashort (down to 10 fs) light pulses amplification due to extremely side amplification band of the transition. Photolytical pumping of XeF(C-A) by pulsed discharge or shock wave radiation allows one to amplify light beams with the cross-section at least up to * 1 m2. Taking Into account strong bulk and surface nonlinear effects at high power density it seems feasible to get the output energy up to ~ 1kJ, and the power density in the focal spot up to lO^\/cm2. Consideration of spatial-time distribution of the excited XeF(C) molecules, formed in the XePg photodlssociation wave under the action of powerful optical pumping, shows a possibility in principle to design multipass amplifiers with the Inversion running wave, which are intended for the amplification of ultrashort pulsea up to the energies noted above. ---------------------------<\/div>\n<\/p>\n

A.A. Aseev , <\/em> E.G. Devitsin , <\/em> A.A. Komar , <\/em> V.A. Kozlov , <\/em> Yu.I. Hovsepyan , <\/em> S.Yu. Potashov , <\/em> K.A. Sokolovsky , <\/em> T.V. Uvarova <\/em>
\n\u2116 127<\/strong> BAYB2F8 — NEW RADIATION HARD CHERENKOV RADIATOR FOR ELECTROMAGNETIC CALORIMETERS
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

Radiation hardness and optical properties of a new Cherenkov radiator — heavy fluoride BaYb2F8 doped with various elements have been studied. The above mentioned crystal has the density of 7g\/cm3, the radiation length of 1.28 cm and the Moliere radit, of 2. 44 cm. High radiation hardness has been demonstrated for BaY2F8 doped with Tm, Pr, Tb. ---------------------------<\/div>\n<\/p>\n

Yu.A. Bogdanov , <\/em> K.V. Volodchenko , <\/em> S.I. Kanorskii , <\/em> I.I. Sobelman , <\/em> V.N. Sorokin , <\/em> I.I. Struk , <\/em> E.A. Yukov <\/em>
\n\u2116 129<\/strong> OPTICAL POLARIZATION OF DENSE sHe GAS
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

A current status and perspectives of the work on a high density polar ized 3He target are reported. The nuclear spin polarization of sHe if produced by spin exchange with laser pumped Rb atoms. CW Ti:Sapphirt laser pumped by an argon ion laser provided 3 W output at 795 nm and allowed to polarize 3He gas to 50-90 % at the pressure of 3.5 aim. A high pulse repetition rate (10 kHz) Ti:Sapphiie laser has been designed and built. It is pumped by the second harmonics of the two NdrYAG lasers with average power of 20 -f- 30 W at 532 nm. According to preliminary results this laser can produce in tur.i the 5-6 Watts average output and will be capable to polarize the 3Hc target with a thickness [3He]} I np to 1 -r 2 ? 1021cm~2 needed for experiments with slow polarised neutrons in search of time reversal non-invariance. ---------------------------<\/div>\n<\/p>\n

M.A. Vasiliev <\/em>
\n\u2116 132<\/strong> Invited talk given at the first international Sakharov conference on physics, Moscow, May 27-31, 1991
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

V.A. Karmanov , <\/em> A.V. Smirnov <\/em>
\n\u2116 134<\/strong> ELECTROMAGNETIC FORM FACTORS IN THE LIGHT FRONT DYNAMICS
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

It is shown that electromagnetic vertex of a nucleus (and of any bound system), expressed through the wave function in the light front dynamics at relativistic values of momentum transfer, contains a contribution of non-physical form factors increasing the total number of invariant form factors (for the deuteron — from 3 up to 11). This fact explains an ambiguities in the form factors calculated previously. The physical and unphysical form factors are covariantly separated. Explicit expressions for physical form factors of systems with spin 0, 1\/2 and 1 through the vertex functions are obtained. ---------------------------<\/div>\n<\/p>\n

V.P. Karassiov <\/em>
\n\u2116 138<\/strong> NEW LIE-ALGEBRAIC STRUCTURES IN NONLINEAR PROBLEMS OF QUANTUM OPTICS AND LASER PHYSICS
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

New Lie-algebraic structures (polynomial deformations of Lie algebras) are revealed in some problems of quantum optics and laser physics. Specifically, deformations of oscillator algebras due to extensions of unitary algebras by their symmetric and skew-symmetric tensors are shown to be algebras of dynamic symmetry (ADS) in models of n-photon processes with internal symmetries. Similarly, deformed algebras su,(2) are found as ADS in contextes of generalized Dicke models and frequency conversion ones. We also briefly discuss some possible schemes of employing the results to solving physical problems. ---------------------------<\/div>\n<\/p>\n

V.P. Martovitsky , <\/em> I.F. Kazakov , <\/em> V.V. Rodin , <\/em> V.A. Stepanov <\/em>
\n\u2116 141<\/strong> VARIABLE COMPONENT OF THE SUPERCELL OF BI2SR2GAGU2O8+\u0431 CRYSTALS UNDER LOW TEMPERATURE ANNEALING
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

It was established by X-ray diffraction that the as-grown Bi2Sr2CaCUu2O8+\u0431 crystals, prepared by a fast growth method, consist of blocks differing by both c-axls lattice parameter and supercell monoclinic deformation. The monoclinic deformation of the supercell Is caused by a small out-of-plane component of the modulation vector. This component can either disappear or Increase after low temperature annealing in atmospheric pressure oxygen. The disappeared out-of-plane component of the modulation vector appears again when sample was annealed In 1-atm argon. The supercell monoclinic deformation seems to be associated with the superconducting transition width as revealed by AC usceptibility measurements of both as-grown and annealed Bi2Sr2CaCU2O8+\u0431 crystals along with structural measurements. ---------------------------<\/div>\n<\/p>\n

L.L. Losev , <\/em> A.P. Lutsenko , <\/em> S.N. Sazonov <\/em>
\n\u2116 143<\/strong> T \u0415 R A W \u0410 \u0422 \u0422 \u0420 I \u0421 O S \u0415 \u041e \u041e N D L A S \u0415 R WITH CONTRAST RATIO 1 \u041e1 3 (PROPOSAL)
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

V.M. Fyodorov , <\/em> Z.. Szadkovski <\/em>
\n\u2116 146<\/strong> ON THE INVESTIGATION OF COSMIC MUONS BY COMPACT DEEP UNDERWATER DETECTOR OF SUPER-WEAK LIGHT SIGNALS
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

The problems of cosmic muons investigations in oceans connected with the detection of Cherenkov radiation emitted by ultrarelativistic muons in water are discussed. The Deep Undersea Detector of Muons (DDMJ budt in collaboration between Physical Institute of Lodz University and Physical Institute of USSR Academy of Science is described The miscellaneous configurations of DDM to future exploatation are proposed ---------------------------<\/div>\n<\/p>\n

N.. Khviengia <\/em>
\n\u2116 148<\/strong> \u041eN W-ALGEBRA REALIZATION AND MASTER EQOATIOM
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

We consider quantum W-algebra, The problem of Unclosing is discussed for the various realizations: a) by weans of \u041a\u0430\u0435-Moody currents and b)with the free scalar fields. Me found the possible candidate for the solution of «master» equation for A1 and A2 groups. In the case of a) calculations are carried out within the framework of symmetric and single root ansatz. The possibility of reproducing Zamolodchokov algebra for these issues is discussed. ---------------------------<\/div>\n<\/p>\n","protected":false},"excerpt":{"rendered":"

V.P. Silin , S.A. Uryupin \u2116 6 ELECTRON HEATING UNDER CYCLOTRON ABSORPTION OF ELECTROMAGNETIC FIELD IN TURBULENT PLASMA \u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442 |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f| There baa been studied the fart heating of electrons in a magnetised plasma with ion-acoustic turbulence under such conditione’ that the firequency of the heating electromagnetic field is comparable with the electron cyclotron one. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"_links":{"self":[{"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=\/wp\/v2\/posts\/1574"}],"collection":[{"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1574"}],"version-history":[{"count":0,"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=\/wp\/v2\/posts\/1574\/revisions"}],"wp:attachment":[{"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1574"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1574"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1574"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}