O.V. Ershov , A.A. Minakov , V.P. Zhaliminov
№ 2 LOW TEMPERATURE AC MICROCALORIMETER.
Скачать препринт |Аннотация|
The calorimeter described is intended for neasureaenta of heat capacity and thermal conductivity of microsamples weighted 1 — 30 mg in the temperature range 4.2 — 300 R. The ac method used makes it possible to measure these parameters during continuous change of the temperature which can be controlled with the accuracy 0.01 K. This microcalorimeter is fully automatized with IBM PC. It can be used with standard transportable cryogenic Dewar for liquid nitrogen or heliun. The description of ac metnod in calorimetry and conditions of it applicability are adduced in this paper. The construction of the ac calorimeter is described and analysis of the device paraneters is carried out. The results of heat capacity measurenents for ZnCr2Se4 antiferroeagnet and YBa2-Cu307 high-Tc superconductors are shown.
---------------------------
S.N. Mayburov
№ 3 QUANTUM MEASUREMENT, REDUCTION AND GENERAL UNCERTAIN STATES
Скачать препринт |Аннотация|
The spontaneously broken global symmetry of quantum states analyzed as the phenomenologica’ model of quant measurements process. Based on it original interpretation of quantum mechanics is proposed which use the conception of general uncertain quantum state. Wheeler’s delayed chc:ce experiment and EPR-Bohm nonlocality effects are regarded in its framework.
---------------------------
I.. Adam , A.N. Eliseev , V.L. Kashevarov , A.V. Kolchin , A.V. Kravisov , A.I. Lebedev , L.N. Pavluchenko , S.S. Sidorin , G.A. Sokol , V.A. Tryasuchev , A.S. Harlashin , W.. Wagner
№ 9 NEW APPROACH IN PARTIAL CHANNELS STUDY OF MESON PHOTOPRODUCTION OFF NUCLEI.
Скачать препринт |Аннотация|
THE REPORT IS DEVOTED TO SHORT THEORETICAL CONSIDERATION OF ANGULAR DISTRIBUTION IN PARTIAL REACTION OF MESON PHOTOPRODUCTION OFF NUCLEI AND TO ELABORATION OF EXPERIMENTAL PROPOSAL TO MEASURE THIS DISTRIBUTION ON THE BASIS OF Г’ «-COINCIDENCE DETECTION
---------------------------
V.B. Rozanov , N.V. Zmitrenko
№ 16 ИНКРЕМЕНТЫ неустойчивости кельвина-гельмгольца в ЗАДАЧАХ ЛАЗЕРНОГО ТЕРМОЯДЕРНОГО СИНТЕЗА.
Скачать препринт |Аннотация|
A hydrodynamic instability development in a real throe dimensional geometry during laser target implosion is ono of the Most important processes, which determines plasma parameters one can achieve with a cumulation Ш. It was shown formerly by theory and experiments [21 that a moment of a transition into a turbulent state and to a mixing of heavy and light fluids is determined by a competition between Rayleigh-Taylor (RT) or RlcWfaayer-Meshkov CRN) instabilities during their development on a nonlinear stage and Kelvin-Helmholtz (KID one. An analysis of such kind of a competition leads to the (here X is the wavelength of perturbation, Д u?? ? v% ? ? is the jump of tangential velocities between heavy and light liquids, & uRT is the velocity of a heavy stream falling into the light fluid, / ? /C pi / ) is the function depending on density ratio and s is the spike amplitude of perturbation when the mixing begins. An approach which has been developed makes it possible to analyze, in a common way, the transition to the turbulence in 2-D and 3-D cases, and to establish the essential distinctions between thea, which affect the fusion plasma parameters at a cumulation moment. For such an analysis it is necessary to determine the increments of KH instabilities development for a wider set of conditions than it had been done before. In the present work, th? growth rates of KHI were obtained for a number of cylindrical and plane problems. An analysis of a linear stage of KHI and a proper dispersion equation were given in [3]. A technique developed there allows one to make some generalization for the case of the bounded media, which is of special interest for us. A qualitative illustration of these problems is shown in Fig.1
---------------------------
B.I. Goryachev , N.V. Linkova
№ 19 EVALUATION OF PAHAMETEKS OF SHB HADROH ВЬИСНЮНАОНКИС БТШСТОШ USIHG KKKHGY SPECTRA OF <5-BLKCTR0KS PRODUCED EST
Скачать препринт |Аннотация|
It is discussed the method proposed by the authors to investigate the electromagnetic structure of hadrons by means of analysis of the energy spectra of tf-electrons produced by ultrarelativistic hadrons. It is shown Cfor spinless particles, as an example Э that for the Lorentz factors у ? 10 this method enables one to evaluate not only the value of the charge rms radius r , but as well some model factor M, which can caracterize the compact!vity of hadron electric charge distribution. Some estimations of both statistical accuracy and measurement one, which are’ required in the experiment, are presented as a result of Monte Carlo calculations. It is discussed how to get information on the plateau formation in the total average ionization loss for ultrarelativistic hadrons by means of ^-electron energy spectra.
---------------------------
Г.А. Вергунова , В.Г. Новиков , В.Б. Розанов
№ 20 Моделирование спектра излучения и поглощения лазерной плазмы
Скачать препринт |Аннотация|
A new model for spectral characteristics calculation of a nonequilibri’um plasma with emission is proposed. The model is based on the average atom approximation, though it can easily be generalized for a detail consideration of the ion configuration. In spectral interpretation of the plasma, under arbitrary conditions, one makes use of the spectral characteristics for two limiting cases, i.e. transparent and nontransparent piasaas. By using the obtained equations as the basis, we have given a comprehensive interpretation for emission spectrum of an argon plasma of random thickness.
---------------------------
M.A. Kitaeva
№ 21 Radio recombinnation lines. Bibliography
Скачать препринт
E.N. Belenov , A.V. Nazarkin
№ 24 On the problem of high-temperature superconductivity of layered conpounds
Скачать препринт |Аннотация|
We demonstrate that in the framework of Ginzburg-Iendau differentia difference equations it is possible to explain the properties of layered superconductors, such as anlsotropy of the energy gap and high value of critical temperature. We show that anieotropy of the energy gap as well as high value of f in these compounds can be explained by Josephson coupling between layers.
---------------------------
B.G. Devitsin , L.M. Dmitruk , V.A. Kozlov , A.A. Komar , M.I. Kotov , Yu.I. Hovsepjan , L.S. Popov , S.Yu. Potashov , K.A. Sokolovsky
№ 25 Heavy fluoride classes as promising materials for application in electromagnetic calorimetry
Скачать препринт |Аннотация|
The luminescent properties and radiation hardneaaot fluoride glasses made on the basis of Hafnltaatetraftuor Ida have been etildied. Following characteristics were found: the density — 5.83 ? 6.93 g/cm ; radiation lengths — 1.60 * 1.25 cm. For the best scintillating fluoride glass composition the light yield was 1.1% of that of NaltTl); decay times of fast and slow components were 4.88 and 20.0 ns respectively; radiation hardness was ? 10 rad.
---------------------------
N.E. Andreev , L.M. Gorbunov , V.I. Kirsanov , A.A. Pogosova , R.R. Ramazashvili
№ 27 aSelf resonant wake-field generation by intense laser pulse in plasmas
Скачать препринт |Аннотация|
Three-dimensional axially-syaaetrical evolution of short laser-pulse (that is still long enough not to excite initially a plasaa wave) is considered. It is deaonstrated that in the process of evolution the aain body of the pulse is compressed and self-modulated, so that during a fairly long period of tiae the pulse generates resonantly a strong and stable plasaa wakefield. The intensity of the wake-field is so high that it can provide a new proaising outlook for the plasaa based accelerator concept. яь
---------------------------
V.S. Kovalev
№ 28 DE/DX.R METHOD USED IN A NUCLEAR SPECTROMETER WITH LARGE GEOMETRICAL FACTOR
Скачать препринт
T.E. Fradkina
№ 35 THS UHIVBBSAL QUXNTUM PORMALISM FOR REALATIVISTIC FERMI — BOSE GAUGE SYSTEMS WITH CONSTRAINTS
Скачать препринт |Аннотация|
The methods of covariani quantization for any relmtivistic Fermi — Bote gauge syitenu with constraints, which are carried out in the present article, covered all possible cases of gauge theory with fust-class constraints of ?rbiiiary rank and also second-class constraints 1m some unified current version of quantum formalism.
---------------------------
T.E. Fradkina
№ 36 IN ADDITION TO BATALIN-VILKOVISKY SPECIAL LAGRANGIAN FORMALISM
Скачать препринт |Аннотация|
That formalism 11-2] in applications to many gauge systems, such as superparticle and superstring systems, has mainly failed [3] is due to the fact that any non-trivial second-class constraints in ihe framework of this formalism cannot be treated. As a rule, in this situation (in die semklassical quantum Lagrangian approach in which this formalism works) we encounter additional Lagrangian measures which are of great importance in this type of Uieory. In die real quantum Lagrangien approach, these additional terms may change the quantum configuration space. The aim of the present article is to derive a method for the correct expression of the Lagrangian measure and this was done for any possible case of gauge theories of arbitrary form and rank.
---------------------------
T.E. Fradkina
№ 37 QUANTUM SUPERPARTICLE IN D = 10
Скачать препринт |Аннотация|
In the present article, we carry out the operational quantization for the там1ем Brink-Schwarz superparticle and massive Casalbuoni-Brink-Schwan ?uperparticle model in the space-time of ten dimensions within the framework of Fradkin-Bsulin-Fradkina (FBF) universal formalism for the gsuge-equivalent constructions (1 -3], which present the covariant version of the general gauge quantum coiutructioru.
---------------------------
V.A. Alekseev , D.D. Krylova
№ 39 COHERENT POPULATION TRAPPING: ASYMPTOTICAL BEHAVIOUR OF ATOMIC DENSITY-MATRIX
Скачать препринт
S.I. Nikolsky
№ 42 EXPERIMENTAL DATA ON INELASTIC COLLISIONS WITH LIGHT NUCLEI OF COSMIC RAY PROTONS IN THE ENERGY RANGE 1016 — 1017 eV
Скачать препринт
|Аннотация|
Disappearance of fragmentation part of the secondary hadrons in the narrow interval of the primary proton energy 5 x 10 ? 2 x 10* TeV means a violation of the quark-spectator hadronization. It is connected with the production of particles with masses > 400 GeV/c3 by the decay of which muons, neutrinos and hadrons are generated with the big transverse momenta. It is possible Higgs-bosons.
---------------------------
Alexander.P. Rogatov
№ 43 LATERAL FIELD INSTABILITY AND 6-WAVE MIXING IN A DIODE LASER WITH BROAD ACTIVE AREA. PART I. DEGENERATE CASE. PART II. NON- -DEGENERATE CASE.
Скачать препринт
V.P. Frolov , G.N. Gluschenko , V.E. Kuryan
№ 44 On quantum instability of a «Time machine» (a 4-dimensional model)
Скачать препринт |Аннотация|
Л 4?dimensional model of a locally static multiply connected spaeetime witb a non-potential gravitational field i* propoaed which describes formation of regions with closed timelike curve* The л renormslised valuee of < ? >f» and th* stress-energy tensor < T >r*° for a scalar field 4 are calculated in this spacetime and it i* shown that they are infinitely growing near future Cauchy horison.
---------------------------
V.F. Kovalev , V.V. Pustovalov , S.I. Senashov
№ 56 Lie-backlund symmetry of the elliptic type system of two quasi-linear equations
Скачать препринт |Аннотация|
The Lie-8*cklund symmetry of the second and the third order of the elliptic type system of two homogeneous first order equations .is calculated. High-order Lie-Bickiund symmetries are constructed with the help of the three recursion operators obtained. The use of the iie-B*cfclund symmetry in order to derive invariant solutions of basic equations is demonstrated.
---------------------------
I.V. Aleksandrova , E.R. Koresheva , I.E. Osipov
№ 57 Inertial confinement fusion targets:phase transition inside icf target cryolyer under preheating and its possible influence on implosion
Скачать препринт |Аннотация|
The results on studying of a hydrogen isotope solid amorphous film recrystaliization are presented. The characteristic parameters of this process are founded. The threshold temperature is half an order lower than a corresponding даШпд temperature of a bulk matter. The characteristic time of recrystaliization does not exceed 60 min under isotermal conditions that promises for the value to be of order 100 fjsee under- the absence of heat removal when cryotarget is inside a vacuum chamber . A significant influence of an initial solid fuel layer structure on the cryotarget the?rmal history in vacuum chamber before target irradiation Is shown. The problem of fuel cryoiayer structure influence on the course? of implosion is under consideration. Optimal means for cryotargets. frequentative delivery into the powerful laser focus are suggested
---------------------------
O.M. Ivanov , A.G. Savinkov
№ 61 Quantum anyon?like systems with topological charges on U/(l)-bundles
Скачать препринт |Аннотация|
We investigate some class of locally Hamiltonian systems. To for?mulate a global Hamiltonian formalism a non-trivial principal U(l)-bundle over multiparticle dynamical space is constructed. Lift of dy?namics to the total space is considered for the models. Absence of a transposition operator lifting to the bundle space forces us to re?view a statistics theme from new standpoint. A topological invariant to characterize system properties is generalized by using geometrical methods and anyon analogy.
---------------------------
V.P. Karassiov
№ 63 POLARIZATION STRUCTURE OF QUANTUM LIGHT FIELDS: A NEWINSIGHT. 1 GENERAL OUTLOOK
Скачать препринт |Аннотация|
A nex consequent description of the polarization structure of light Ml thin the framework of quantum optics is given bu using the polarization gauge SU(2) invariance of free electromagnetic fields and a’ related concept of the polarization spin, Within this approach the quantum light may be thought as a Mixture of usual polarized photons and unpolarized biphotons. New classes of unpolarized light states generated by P-scalar biphotons are examsined. Possible applications are briefly discussed.
---------------------------
V.P. Karassiov
№ 64 POLARIZATION STRUCTURE OF QUANTUM LI6HT FIELDS: A NEW INSIGHT. i. GENERAL OUTLOOK.
Скачать препринт |Аннотация|
New (polynomial)deformations of the sl(2) Lie algebra are shown to be dynamic symmetry (spectrum generating) algebras for some multi-photon models exhibiting internal symmetries New techniques based on the formalism of these algebras are developed for solving spectral and evolution phuslcal tasks in the models under study. A physical meaning of the results obtained is discussed.
---------------------------
V.P. Karassiov
№ 65 DEFORMATIONS OF LIE (SUPER)ALGEBRAS IN QUANTUM THEORIES WITHS INTERNAL SYMMETRIES
Скачать препринт |Аннотация|
Extensions of the unitary algebras u by their syaaetric and sкем-summetric tensors in their realization with the help of bosonic and fermionic operators are considered;. They are shown to result in non-quantum (polynomial) deformations of oscillator (super)algebras which are relevant to theories with Internal Cn — and SU-symmeties respectively. Irreducible representations of the algebras obtained are found in the Foci spaces of the initial oscillators. Some applications of the results to composite field models are briefly discussed.
---------------------------
I.A. Artyukov , A.I. Fedorenko , V.V. Kondratenko , S.A. Yultin , A.V. Vinogradov
№ 66 SOFT X-RAY SUBMICRON IMAGING EXPERIMENTS WITH NANOSECOND EXPOSURE
Скачать препринт |Аннотация|
The high throughput soft X-ray optical system was designed, con?structed and tested for obtaining of magnified images of nonradiating objects at wavelength Л = 176…200 A. The optical system consists of normal incidence multilayer mirrors including condenser and Schwarz-schild objective with 10х magnification and it was applied together with laser produced plasma as an X-ray source. The magnified images with 07 mkm resolution were produced in one shot exposure at 0.8… 1 J of incident laser energy. These results show the potential for development of table-top soft X-ray microscopes with 1 nanosecond exposure and submicron spatial resolution
---------------------------
