Approved For Release 2001/03/26: CIA-RDP96-00787ROO0500130048-3
     ELECTRICITY AND MAGNETISM
     STHONG SCATTERING OF pARTICLES IN RANDOMLY INHOMOGENEOUS MAGNETIC FIELD
     vo@ Russian
     ...jcow zjjURNAL EKSPERIMENTAL'NOY I TEORETICHESKOY FIZIKI in
       Vol 81,,No 5(11), Nov 81 (manuscript received 7 May 81). pp 1723-1730
     /_/.L_ Pud,
     V,-%YNS11TEYN, S.Iand KICHATINOV L L., Instityte-of Ter-rgat-rinj
     s- C e and R PrODaqu - Tjbprjjq.U hanartment - -USSR
      the lono pY r adio Wave Acadm@
     Sciences
                                              0
     !Abstract] A kinetic equation is derived that'describes propagation of charged
     particles in an electromagnetic f ield with random inhomogeneities in intense
     @;cattering. The formulated problem is analogous to the theory of strong
     @catteriiig of electromagnetic waves, and to the problem of hydrodynamic turbulence,
     where there is no spil. parameter. Solution of the problem is based on Orszag's
     Approach [see S. A. Orszag, JOURNAL OF FLUID MECHANICS, Vol 41, 1970, p 3631,
     @@hich yields t@_eK@@og7oiFo_v spectrum in hydrodynamic turbulence theory. At the
     weak scattering limit, the derived equation is automatically transformed to pre-
     found results. The proposed method improves on Orszag's scheme in the
     :Act chat an equation is derived for the memory time of the system-T, rather
     -);in merely assigning this parameter. The proposed kinetic equation is valid
     4-V*-'n When the particle scattering angle on the correlation length of the
     -4gnetic field is not small. An examination is made of the diffusion approxi-
     -4Lion with consideration of particle acceleration by a stochastic electric
     le Id - References 12: 6 Russian, 6 Western.
     :78-66101
     5
     Approved For Release 2001/03/26:. CIA-RDP96-00787ROO0500130048-3

     

        Approved For Release 2001/03/26 CIA-RDP96-00787ROO0500130048-3
        9 FLUID DYNAMICS
        CDC 541.124/128
        NONEQUILIBRIUM VIBRATIONAL MOLECULAR EXCITATION BEHIND SHOCK WAVE FRONT IN
        GASES
        Novosibirsk ZHURNAL PRIKLADNOY MEKHANIKI I TEKHNICHESKOY FIZIKI in Russian
        No 5(129), Sep-Oct 81 (manuscript received 25 Jun 80) pp 49-54
        /U L." P) 4@
        DOBKIN, S. V. and SON, E.-Ye., Moscow
        [Abstract] Previous research has shown that when a shock wave propagates
        through a light gas doped slightly with a heavy gas, the length of transla-
        tional relaxation of the heavy molecules is approximately mG/m times longer
        than for the' light molecules (where mG and mL are the masses oi the heavy and
        light components). This is because a large number of collisions is needed to
        slow down a heavy particle. In this paper, a qualitative analysis is made of
        phenomena that take place in deceleration of a molecule made up of atoms with
        masses mH and mF in a medium of particles of mass mL (m H>>mF,@mL). The fraction
        of vibrational energy transmitted to the molecule as it is decelerated in' the
        light gas is calculated, and an examination is made of relaxation of the
        vibrational energy of molecules described by harmonic oscillators in the zone
        of deceleration in the light gas behind the shock wave front. It is shown
        that shock wave propagation in such a medium may be accompanied by a process
        of "nonequilibrium" excitation of the heavy gas molecules in which the
        vibrational temperature may rise to levels that exceed the gas temperature
        behind the shock wave front in contrast to the equilibrium case. An example
        of calculation of the vibrational energy in a shock wave in a mixture of helium
        with uranium hexafluoride is given. The possibility of experimental confirma-
        tion is discussed. Figures 2, references 7: 5 Russian, 2 Western.
        [70-66101
        6
        Approved For Release 2001/03/26 : CIA-RDP96-00787ROO0500130048-3