摘要:

AbstractNonlinear interaction of low‐frequency resonant and high‐frequency nonresonant plasma oscillations in the presence of an external magnetic field is studied. In the case of Iongitudinal waves it is shown that the up‐conversion of plasma oscillations' energy is possible in such a s

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300302

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractA derivation of hydrodynamic equations which describe diffusion in connection with reaction processes in many‐particle systems is given on the basis of quantum kinetic theory. For this purpose kinetic equations are derived for a quantum gas with chemical reactions. Following Grad's method in a linear approximation reaction‐diffusion equations can be obtained with explicite expressions for the diffusion and reaction rate coefficients. The influence of nonideality effects in reaction‐diffusion equations is disc

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300303

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractThe stopping power and the stopping number, respectively, of charged particles are determined in the frame of the dielectric formalism in random phase approximation. The high and low velocity limits are disscussed. Numerical evalution is given for arbitrary masses of the projectile particle using a dielectric function ϵ(κ, ω) valid for all values of degeneracy. The connection with transport (e.g. electrical resistivity) is consider

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300304

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractWe analyze the influence of collisions on a plasma column with cylindrical symmetry in the pressure regime between the collision‐dominated and the free‐fall case. A model is investigated which can handle arbitrary contributions from ion‐neutral‐collisions. One finds an analytic solution for the ion‐distribution‐function which depends functionally on the potential. This electrical potential is calculated numerically — with consideration of the space‐charge‐layer near the wall — and selfconsistently from the Poisson‐equation. From the calculation of the ion‐distribution‐function, of density, flux and temperature of the ions as well as of the potential variation, we discuss the influence of the model parameters. The results are compared with corresponding

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300305

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractA simple snow‐plow model for the two‐gas gas‐puff Z pinch is investigated. An expression for the plasma velocity in the central test‐gas region is derived and the radius of maximum compression det

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300306

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractLinear and nonlinear propagation of magnetic electron drift vortex waves in a nonuniform magnetic field is investigated by means of a generalized adiabatic law which takes into account the effect of strong fields and reduces in the appropriate limits to several well known energy conservation equations in a collisionless plasma. In the linear limit, an instability is shown to exist, whereas in the nonlinear regime, steady‐state dipole vortices associated with the electron drift vortex waves may appear. The anomalous electron energy transport associated with the unstable magnetic electron drift vortex waves is investigated by means of a quasilinear theor

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300307

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractMagnetohydrodynamic equations for plasmas with large Larmor radii are used to derive the wave coupling coefficients. The results generalize those of previous works.

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300308

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractIn a plasma acted on by an intense laser field, one encounters the problem of nonlinearly‐coupled Langmuir and ion‐acoustic waves. We use a generalized perturbation theory to discuss the nature of coupled oscillatory waves in this system, and the possibility of formation of an ionshe

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300309

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractEvolution of pulses for unmagnetized plasmas have been considered. By using Rayleigh‐Ritz optimization method based on trial functions ordinary differential equations for the pulse parameters have been derived. It is found that the character of the pulse parameters depends on the initial wavenumber chir

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300310

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractThe Langmuir Probe Measurement of the electron density and electron temperature has been made in the argon flowing afterglow plasma. Furthermore the metastable and charged particle densities evolution in the afterglow plasma are investigated by means of a numerical solution of the set of balance equations. From the fitting of the results of these calculations to the experimental data obtained from Langmuir probe measurements it is possible to determine the evolution of the metastable atoms density in the flowing afterglow plasma.

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300311

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY