摘要:

AbstractAn introduction is given to research on dense (or nonideal) plasmas which can be generated to advantage by ballistic compressors. Some properties of ballistic compressors are discussed especially in comparison with shock tubes. A short review is given on the history of these devices for high‐pressure plasma generation. The present state of the art is reported including research on the two ZIE ballistic compressor

ISSN:0005-8025    

DOI:10.1002/ctpp.19860260402

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY

摘要:

AbstractA simple model of the penetration of particle effluxes from the core plasma into the SOL‐plasma of tokamaks is proposed. The assumptions made are free streaming of particles parallel to the magnetic field and anomalous particle transport perpendicular to the toroidal field with a constant radial velocity. The model has been proved for measured particle fluxes of Li which was injected into the core plasma of the tokamak T‐10. The dependence of the Li‐particle flux on the minor radius as well as toroidal asymmetries in the SOL‐plasma can be explained by the results of the calcu

ISSN:0005-8025    

DOI:10.1002/ctpp.19860260403

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY

摘要:

AbstractIn a previous paper the results of the Langmuir probe experiment carried out on board of two INTERKOSMOS satellites have been described. The experiences have shown that the usage of high quality algorithms for analyzing the current‐voltage‐characteristics is necessary to yield real physical parameters.The key problem is the determination of the plasma potential. This paper reviews the different methods to determine the plasma potential especially under the circumstances of computer application. The test of the well developed methods shows, that for the evaluation of the applied methods a number of different factors, discussed in the following sections of this paper, has to be taken into account. The used test data are model values or real measurements obtained by the satellite missions IK‐10, IK‐18 and BULGARIA‐1300.The computer procedures have been realized as FORTRAN‐subroutines for the BESM 6

ISSN:0005-8025    

DOI:10.1002/ctpp.19860260404

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY

摘要:

AbstractTotal collisional depopulation rates for He(n1S0) (3 ≦n≦ 6), He(31P1) in thermal collisions with Rb have been measured using the transient‐decay method. The measured quenching cross‐sections increase from 4.3 · 10−10cm2to 24 · 10−14cm2with increasing n from 3 to 6.Comparison of experimental results with theoretical estimations shows that the main processes of quenching depend onn. He‐atoms in then= 3, 4 states are mainly quenched by Penning ionisation and higher excited states by coll

ISSN:0005-8025    

DOI:10.1002/ctpp.19860260405

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY

摘要:

AbstractOn the basis of the Green's function formalism multiple scattering effects due to two‐particle scattering are investigated with respect to their influence on the electrical conductivity of dense, non‐ideal hydrogen plasmas. Both the linear response formalism and the rigorous kinetic treatment via the Kadanoff‐Baym equation yield equivalent results for this case. A local lowering of the conductance isotherms for is found to be a consequence of the disappearence of the last bound state of the shielded electron‐proton complex. Influences due to lowest order dynamical shielding effects are found to cause considerable lowering of the conductivity in this region due to photon polarization. We also discuss effects of multiple two‐particle scattering on the photon‐polariza

ISSN:0005-8025    

DOI:10.1002/ctpp.19860260406

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY

摘要:

AbstractThe variation of megagauss magnetic field in two dimensions for a cylindrical target plasma produced by lasers irradiation on the surface of a cylindrical wire has been solved analytically making use of Hankel and Fourier transforms. The results have been compared with the experiments of RAVENet al. (1978).

ISSN:0005-8025    

DOI:10.1002/ctpp.19860260407

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY

摘要:

AbstractA theoretical study of the variation of density and flow velocity due to pondermotive force, near critical density region of a laser – produced plasma, obeying an adiabatic pressure law is reported. The ion‐continuity, momentum and wave equations are solved in a steady state. The density and flow velocity as a function of incident laser intensity are calculated and plotted for both underdense and overdense regions for adiabatic exponent γ = 4/3, 5/3, 2. The velocity decreases and density increases in the overdense region and velocity increase and density decreases in the underdense region with the increase of larger power at sonic point. It is found that the velocity is subsonic in the overdense region and supersonic in the underdense region. The nature of variation is similar to the isothermal m

ISSN:0005-8025    

DOI:10.1002/ctpp.19860260408

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY

ISSN:0005-8025    

DOI:10.1002/ctpp.19860260401

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY