摘要:

AbstractThe excitation temperature functions of 19 spectrum lines of 5 rare gases He, Ne, Ar, Kr, Xe have been calculated according to the method given by Fowler and Milne. The results make it possible to determine the radial plasma temperature distribution in the range of temperatures of 1.4 × 104°K to 14 × 104°K. Some examples are given for the determination of the plasma temperature distribution in space and time by using the Ar ecxitation temperature functions calcula

ISSN:0005-8025    

DOI:10.1002/ctpp.19690090402

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractIn order to prepare the system of ordinary differential equations, describing approximately the non‐linear behaviour of a beam‐plasma system, for numerical solution, at first the dispersion relation is analized. In particular it is shown, that in the case of a three component plasma the complex wave numberk=kr+iγcan be found without difficulties as a function of frequency ω and the plasma parameters, if the electron densitiesnbandnpare treated as the two dependent quantities.The expressions on the right hand sides of the differential equations are transformed in such a way, that all complex integrals can be found as functions of one basic integral, tabulated in the literature, not only for negative values of γ (amplification) but also for positive values of γ (evanescence). In this way it will be possible, to describe the behavior of the wave amplitude not only for short distances from the input, where amplification of the wave takes place, but also for larger distances, where nonlinear Landau‐damping

ISSN:0005-8025    

DOI:10.1002/ctpp.19690090403

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractThe behaviour of a weakly ionized plasma in external, arbitrarily time‐dependent, electromagnetic fields is treated within the framework of kinetic theory. The Boltzmann kinetic equation is solved using the Lorentz ansatz, taking into account elastic collisions between electrons and neutral particles and assuming that the collision frequency is independent of the electron velocity.The drift velocity of electrons enters into the isotropic partf0and into the direction‐dependent partf1of the electron distribution function. A method is given for the calculation of the drift velocity, which is calculated explicitly for the important but difficult case of a sinusoidal electric field in the presence of a magnetic switching field.f0andf1are calculated;f0is investigated generally.f0consists of an expansion in generalized Laguerre polynomials. The influence of the electromagnetic fields on the distribution function and its time variation is discussed and the relaxation behaviour is shown. The following two special cases are calculated explicitly: a linear rising electric field and a sinusoidal electric field, both in the presence of a constant magnetic fi

ISSN:0005-8025    

DOI:10.1002/ctpp.19690090404

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractMit Hilfe einer oszillographischen Doppelsondenmethode wurden die Phasenbeziehungen zwischen den Elektronentemperatur‐1, Feldstärke‐ und Ionenkonzentrationsschwankungen in fremderregtenp‐Schichten in Neon bestimmt. Bei der Auswertung der Sondencharakteristiken gingen wir von einer Druyvesteyn‐Verteilung der Elektronenenergieverteilungsfunktion aus. Die Messungen ergaben, daß das Maximum der Feldstärkeschwankungen mit dem Elektronentemperaturmaximum nahezu zusammenfällt. Ihnen folgt mit einer beträchtlichen Verzögerung von ungefähr π/2 das Trägerdichtemaximum. Die mit Hilfe der Poisson‐ und den beiden Teilchenbilanzgleichungen für die Ionen und Elektronen berechneten Werte zeigen in bezug auf die Phasenbeziehungen zwischen Feldstärke und Trägerdichte

ISSN:0005-8025    

DOI:10.1002/ctpp.19690090405

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractQuasineutrale anisotherme ruhende Entladungssäulen, die in geometrisch ähnlichen Gefäßen betrieben werden, sind auch in ihren wesentlichen physikalischen Kenndaten einander ähnlich, wenn sie inpr0,i/r00,

ISSN:0005-8025    

DOI:10.1002/ctpp.19690090406

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

ISSN:0005-8025    

DOI:10.1002/ctpp.19690090401

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY