摘要:

AbstractIn a preceding paper based upon the time dependent Boltzmann equation the electron kinetics of the weakly ionized HF plasma was investigated firstly by a time‐consuming direct treatment and secondly by the Fourier expansion for the established HF state. Continuing these investigations, the decoupling of the equation determining the period average of the isotropic distribution from the other equations of the system for the harmonics of the isotropic distribution is quantitatively studied for a neon plasma as a typical representative. In this way the applicability of a simplified approach for the electron kinetics in the HF plasma could be justified and a former estimate for a field frequency above which this kinetics can be used could be confirmed. The generalization of this simpler description to arbitrary HF fields and to HF plasmas in other gases is discussed. Employing this approach, the electron kinetics is systematically investigated for the HF plasma in Ne for wide ranges of the HF field amplitude and field frequenc

ISSN:0005-8025    

DOI:10.1002/ctpp.19840240402

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractThe role of collisions in the ion‐cyclotron instabilities in the rotating plasma has been investigated. Collisional varieties of such instabilities at moderate collisions have been shown possible. At frequent enough collisions the total stabilization of such instabilities takes place. A survey of the contemporary state of the problem of the ion‐cyclotron instabilities in rotating plasma has been gi

ISSN:0005-8025    

DOI:10.1002/ctpp.19840240403

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractThe problem of transport equations of a collisional plasma in a curvilinear magnetic field is studied. Two main approaches to this problem are presented: that based on using the Boltzmann kinetic equation and the drift kinetic equation approach. In the frame of the first approach a multimoment transport equation set is found which is more general than the transport equation sets of Braginskii and Grad. The tensor equations of this set are described in an arbitrary curvilinear coordinate system. This allow to use these equations in problems of a plasma confined in toroidal magnetic configurations. Simplification of the multimoment transport equation set in the case of high magnetic field is performed. In the frame of the drift kinetic equation approach, a generalization of the drift transport equations derived earlier by the authors (Zh. Eksp. Teor. Fiz. 83 (1982) 139) is given.

ISSN:0005-8025    

DOI:10.1002/ctpp.19840240404

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractWe demonstrate a proof for the existence of a maximal potential for the higher nonlinear evolution equation (see part I). This maximum potential depends upon the plasma parameters and therefore upon the mechanism of instability too. The problems of the stability and of the asymptotic soliton solution are discussed. Finally we present different numerical results.

ISSN:0005-8025    

DOI:10.1002/ctpp.19840240405

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractThe ion‐acoustic instability in gaseous discharge plasma in krypton and xenon at the pressures 0.4 to 2.5 Torr was found and studied. The necessary conditions for the instability existence were satisfied only in the ionisation wave region where electron density was about an order larger than average one. The detected noise amplitude and frequency dependence on the glow discharge plasma parameters was also investigate

ISSN:0005-8025    

DOI:10.1002/ctpp.19840240406

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractThe energy which may be introduced into the plasma of an e‐beam sustained laser discharge depends on the electron loss processes as recombination and attachment. Measuring the time behaviour of the discharge current both the recombination and the attachment rate coefficients can be determined.The results of such investigations reported here suggest that some widely used assumptions have to be proofed carefully once more. It could be shown that in the case of pure nitrogen the recombination coefficient decreases very rapidly immediately after the discharge ignition even if the reduced electric field strength remains unchanged. In CO2‐discharges such a behaviour could not be observed. Moreover, it has been found that CO2‐discharges are stable only as long as they are recombination determined.These results are supported by additional investigations in N2—CO2‐mixtures. Some conclusions according to the operation of tunable high pressure lasers

ISSN:0005-8025    

DOI:10.1002/ctpp.19840240407

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractDie vorliegende Arbeit stellt eine Übersicht der physikalischen Probleme dar, die sich bei der Computer‐Auswertung von im Magnetosphärenplasma der Erde gemessenen Langmuir‐Sondencharakteristiken ergaben. Nach einer Abschätzung der Meßbereiche für die Temperatur‐ und Dichtebestimmung wird auf die Ableitung physikalischer Größen aus der Strom‐Spannungs‐Charakteristik unter den besonderen Bedingungen eines kosmischen Experiments eingegangen.Der zweite Teil der Arbeit ist der rechentechnischen Lösung der Aufgaben

ISSN:0005-8025    

DOI:10.1002/ctpp.19840240408

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractFast electrons leaving a hollow cathode discharge axially through the orifice of a hole probe undergo ionizing collisions with the discharge gas in and behind the orifice. Ar++ions produced in this way are used as a monitor for the density of fast electrons,Nef, on the axis of the negative glow of a cylindrical hollow cathode discharge. Data onNefas dependent on the pressure of the Ar discharge gas and on the discharge current are obtained and an analytical expression for these dependences is found and discussed.

ISSN:0005-8025    

DOI:10.1002/ctpp.19840240409

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractThe paper presents a mathematical description of tomographic algorithms for experimental data reduction. In a numerical experiment, problems of selection of optimum parameters of a measuring system to attain a prescribed accuracy of the emission coefficient reconstruction were investigated.

ISSN:0005-8025    

DOI:10.1002/ctpp.19840240410

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

ISSN:0005-8025    

DOI:10.1002/ctpp.19840240401

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY