{"id":2143,"date":"2013-03-15T18:22:15","date_gmt":"2013-03-15T14:22:15","guid":{"rendered":"http:\/\/ellphi.lebedev.ru\/?p=2143"},"modified":"2017-07-31T14:00:24","modified_gmt":"2017-07-31T11:00:24","slug":"1994-en","status":"publish","type":"post","link":"http:\/\/preprints.lebedev.ru\/?p=2143","title":{"rendered":"1994 En"},"content":{"rendered":"

A.B. Latyshev , <\/em> A.V. Semenov <\/em>
\n\u2116 4<\/strong> A NEW METHOD FOR COMPLEX SPECTRAL MEASUREMENTS IN MILLIMETER AND SUBMILLIMETER WAVE RANGE
\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 method for measuring complex transmission or reflection coeffi?cients has been proposed and demonstrated using a simple setup. High measurement quality was achieved: phase sensitivity- 0.005 rad., ampli?tude reproduceability — 1%, dynamic range to ~ 107-: 1G (previously 104), phase shift range to be measured 10 . It is effective for BWT-Spec-troscopy due to the absence of any mechanical adjustments during electronic frequency scan. ---------------------------<\/div>\n<\/p>\n

E.G. Bessonov<\/em>
\n\u2116 6<\/strong> Radiative Method of Ion Cooling in Storage Rings
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

L.D. Mikheev , <\/em> C.Y. Malinowski , <\/em> V.I. Cheremiskin <\/em>
\n\u2116 7<\/strong> Optically driven ave of the XeF(C-A) inversion and its application to the short pulse amplification.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

V.P. Karassiov , <\/em> A.B. Klimov <\/em>
\n\u2116 8<\/strong> AN ALGEBRAIC APPROACH TO SOLVING EVOLUTION PROBLEMS IN SOME NONLINEAR QUANTUM MODELS
\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 new general Lie-algebraic approach is proposed to solving evolution tasks in some nonlinear problems of quantum physigs with poiynomially (depwmed Lie algebras *u^(2) as their dynamic symmetry algebras, t he method makes use 6{ \u0430\u043b expansion of the evolution operators by power aeries in the s?^(2) shift operators and a (recursive) redaction of find ing coefficient functions to solving auxiliary exactly solvable ?*(2) problems with quadratic Hamiltonians. ---------------------------<\/div>\n<\/p>\n

V.P. Karassiov <\/em>
\n\u2116 9<\/strong> B1PHOTONS, SQUEEZING AND NEW STATES OF MGHT IN POLARIZATION QUANTUM OPTICS
\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 concept of squee7tngis discussed for multimode quantum light beams with the consid erfation of polarization using the polarization gauge SU(2) invariancc of free electromagnetic fields- We separate the polarization and biphoton degrees of freedom from other ones, and consider uncertainty relatione characterizing polarization and biphoton observable*. At con sequence, we obtain a new classification of polarization states of light within quantum optica We also discuss briefly some interrelations of our analysis with experimi itts related to some fundamental problems of physics. ---------------------------<\/div>\n<\/p>\n

N.V. Markova <\/em>
\n\u2116 13<\/strong> DISPERSION OF COLLECTIVE EXCITATIONS IN NARROW-GAP SEMICONDUCTOR QUANTIZED FILM
\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

III tin- high density limit,the phtMiion spe< Hum of quasi-tw? dimfinina) ?I ilt'gfiiaratc electron \u04401\u0430\u043c\u0448\u0430 in the narrow -gap Kmicoududon i* < ?l rulatad The two e\n\n\t\n M.P. Frolov , <\/em> D.V. Ishkov , <\/em> V.S. Pasyuk , <\/em> N.M. Yuryshev <\/em>
\n\u2116 14<\/strong> Numerical study of energy extraction fron a singlet oxygen-lodlne mixture.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> [spoiler]A numerlcal model is developed and results art? presented which describe dynamics of energy extraction rrou mixture of singlet oxygen aith atomic Iodine under multl-\u0440\u0430\u0432\u0430 propagation of 10 ns laner pulse through 1 \u043c length amplifier. The production of atomic iodine via flash photolysis of iodides C&jl and CF^I la considered. It is shown that high extraction efficiency for reasonable \u0442\u044f\u0432\u042c\u0437\u0433 of passes 20…40 can be obtained with Cli3I which is suitable only for chlorlneless mixtures. The us6 of \u0421\u0423\u041b causes the decrease of eztractton efflolency and needs the initiation system with shorter pals*. ---------------------------<\/div>\n<\/p>\n

G.A. Sokol , <\/em> V.I. Kashevarov , <\/em> A.V. Kravtsov , <\/em> A.I. Lebedev , <\/em> S.A. Mishin , <\/em> L.N. Pevlyuchenko , <\/em> S.S. Sidorin , <\/em> E.I. Tanin , <\/em> V.A. Tryasuchev , <\/em> A.V. Fix , <\/em> A.V. Kolchin , <\/em> A.A. Sibirtsev <\/em>
\n\u2116 17<\/strong> PHOTOPROOUCTION OF ETA-NUCLEI
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

N.G. Borisenko , <\/em> A.I. Gromov <\/em>
\n\u2116 23<\/strong> TECHNOLOGY \u0422\u041e\u041d MAKING LOW DENSITY PCAMS AND POLBffiR NETTINGS WITH METAL PARTICLES
\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 paper is devoted to experiments on making so called low-density matters — materials having densities orders of manltude less than that of solid material of the same composition. Low-density foams, three-dimentional nets and free-standing «snow-like» layers are considered. Initially developed for thermonuclear targets such media are of interest tor fundamental science and are applicable In other fields. ---------------------------<\/div>\n<\/p>\n

S.P. Tsybenko <\/em>
\n\u2116 27<\/strong> A nonlinear skin-effect of quasistatic magnetic field in a plasma model of Davydov-ZaKharov class
\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 hydxodynamic plasma system is formulated in ‘erms of Lavydov-Zakbarov formalism. A nonlinear skin-effect of quasistatic magnetic field there appears to take place in case of generalized potential motion of plasma components. The criterion of exi stance of anomalous \u0430\u04481 nonlinear skin-effects ha? been obtained. ---------------------------<\/div>\n<\/p>\n

N.V. Markova <\/em>
\n\u2116 30<\/strong> CORRELATION BNB! GY OF D1RAC ZLSCTRON GAS IN NARROW-GAP SEMICONDUCTOR
\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

Freaent work i* devoted to the calculation of the correlation energy’s formula of electron gai with Dirac dispersion law in narrow-gap aemicon ductor.The general \u0441\u0430\u043c of finite temperature* T and chemical potential \/J ia considered. The formula for correlation energy is found by method of external Schwinger’a sourceajn high density approximation. ---------------------------<\/div>\n<\/p>\n

N.V. Markova <\/em>
\n\u2116 40<\/strong> GENERATION OF ELECTRON-HOLE PAIRS IN NARROW-GAP SEMICONDUCTOR HETEROSTRUCTURES BY THE POTENTIAL BARRIER (KLEIN’S 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

For heterostructures compounded from the narrow — gap semiconductors such as quantum wells,superlattices, quantum wires, quantum dots, et cetera, Klein’s effect is investigated in the framework of one — particle Dirac the?ory. Dirac electron is considered in quantum well of different configuration. It is shown that if electrical field exceeds the critical value, then the elec?tron -hole pair generation is occured. It is shown the influence of the form of potential barrier on the pair generation. The more exact investigation of Klein’s effect requires the use of many — body quantum field theory and is connected with the behaviour of vacuum. ---------------------------<\/div>\n<\/p>\n

V.S. Pazyuk , <\/em> N.P. Vagin , <\/em> N.N. Yuryshev <\/em>
\n\u2116 42<\/strong> PULSED CHEMICAL OXYGEN- IODINE LASER WITH A DISCHARGE GENERATION OF ATOMIC IODINE
\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

Pulsed chemical oxygen-iodine laser with discharge generation of atomic iodine is described. Having the output energy like that with photolysis iodine atoms generation such a laser exhibits higher plug-in efficiency, The efficiency value of 91% is reported. Pulsed power of lOOkW was obtained which exceeds two orders of magnitude that for CW laser with the same chlorine flowrate. ---------------------------<\/div>\n<\/p>\n

N.G. Basov , <\/em> V.F. Efimkov , <\/em> S.I. Mikhailov , <\/em> Yu.V. Senatsky , <\/em> V.G. Smirnov , <\/em> V.B. Sobolev , <\/em> I.G. Zubarev <\/em>
\n\u2116 43a<\/strong> A project of the «Delfin» facility modernization.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

V.G. Denisova , <\/em> A.M. Dunaevsky , <\/em> S.A. Karpova , <\/em> N.P. Krutikova , <\/em> V.S. Puchkov , <\/em> S.A. Slavatinsky <\/em>
\n\u2116 45<\/strong> ATTENUATION LENGTH OF FAMILIES AND EAS AT MOUNTAIN LEVELS
\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

Zenith angle distribution and attenuation length derived from 586 y-families (groups of the highest energy particles in extensive air showers) and published recently by the PAMIR Collaboration differ from the previous data. In present paper the influence of the measurement procedure and statistics on the attenuation length is discussed. Several different methods of calculating this quantity are considered and the results are compared. The data of the PAMIR experiment as well as the* attenuation length of the y-families and extensive air showers (EAS) found by the experiment HADRON are compared with the simulation results. Simulations were made using three different models of hadron-nuclear interactions that distin?guished mainly by the dependence of the total inelasticity on energy. The accuracy of the well-known equation for the at?tenuation length, which is derived from the analytical solution of the cascade equations, is discussed. The data considered favor the model with rising cross section and total inelasticity. ---------------------------<\/div>\n<\/p>\n

N.S. Konovalova <\/em>
\n\u2116 46<\/strong> POSSIBLE REASONS OF THE PROTON SPECTRUM DISTORTION IN EMULSION CHAMBERS
\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 results of simulation of proton flux,passing through emulsion chambers (EC) with a light material thick target and without any are discussed. It is shown that in the first case the energy threshold region where the measured spectrum differs essentially from the true one is several times wider. This may be a reason of distinction in views of spectra obtained on emulsion chambers of different types. ---------------------------<\/div>\n<\/p>\n

\u0410.\u0418. \u041f\u043e\u0434\u0433\u043e\u0440\u043d\u044b\u0439 <\/em>
\n\u2116 57<\/strong> NUMERICAL SIMULATION \u041eF THE CURRENT SHEET NEAR THE X- l.INE OF SOLAR SPOTS MAGNETIC 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

The current sheet (OS) creation in the region with an X-type aero magnetic field line in the plasma was simulated by numerical solving of \u0417\u041f MHD equations in conditions which were close to the solar corona: the magnetic field sources (dipoles) were situated under the photosphere boundary! and the disturbance propags from the photosphere boundary, borne of values 10,p,Vj were set on the photosphere boundary, other values were determined from the conditions inside the region and were found by using solutions on characteristics going out of the region. After the OS creation it slowly moved upward, but several Alfven times later the OS motion practically ceased, and the plasma velocity changed its direction above the sheet, so the plasma flow became got into the 0? from both its sides. In the case if the magnetic dipoles have such a polarities that there is no X line the JS is not creatac, and *.he wave of disturbance goes out of the region during several Alfven times. The calculations have been done using the program ?PERESVET?, which solves numerically 3D MHD equations and determines the boundary conditions from characteristics. ---------------------------<\/div>\n<\/p>\n","protected":false},"excerpt":{"rendered":"

A.B. Latyshev , A.V. Semenov \u2116 4 A NEW METHOD FOR COMPLEX SPECTRAL MEASUREMENTS IN MILLIMETER AND SUBMILLIMETER WAVE RANGE \u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442 |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f| New method for measuring complex transmission or reflection coeffi?cients has been proposed and demonstrated using a simple setup. High measurement quality was achieved: phase sensitivity- 0.005 rad., ampli?tude reproduceability — 1%, dynamic […]<\/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\/2143"}],"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=2143"}],"version-history":[{"count":3,"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=\/wp\/v2\/posts\/2143\/revisions"}],"predecessor-version":[{"id":6321,"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=\/wp\/v2\/posts\/2143\/revisions\/6321"}],"wp:attachment":[{"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2143"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}