摘要:

AbstractA Michelson‐interferometer in combination with a He‐Ne‐laser was used to determine the gas temperature in a nitrogen low pressure gas discharge. With this method the radial temperature profile could be measured to about 96% of the tube radius. Moreover rotational temperatures were measured with a 2 m‐grating spectrograph from the spectrum ofN2‐ andN2+‐bands. In the range from 4 to 10 torr and 25 to 100 mA gas temperatures between 460 and 890 K were measured with the belonging rotational temperature from 620 to 1170 K. At pressures below 10 torr a difference of the rotational temperatures from the first negative and the second positive system was found. A qualitative consideration on the mechanism of the radial heat conductivity in the positive colum

ISSN:0005-8025    

DOI:10.1002/ctpp.19780180602

出版商:WILEY‐VCH Verlag    

年代:1978

数据来源: WILEY

摘要:

AbstractMit Hilfe der in [1] berechneten Energieverteilungsfunktion der Elektronen und den daraus ermittelten Anregungs‐ und Ionisationsgeschwindigkeiten werden in der vorliegenden Arbeit die Energie‐ und Ladungsträgerbilanzgleichungen für die aktive Zone der Hohlkatodenbogenentladung aufgestellt und gelöst. Durch zusätzliche Anwendung des Minimumprinzips der Energie gelingt die Berechnung folgender Größen: Elektronenkonzentration, Elektronentemperatur, Katodenfall, Katodenwandtemperatur und Stromdichte in der aktiven Zone. Ein Teil dieser berechneten Größen wird mit experimentell erhaltenen verglichen. Es wurde eine befriedigende Übereinstimm

ISSN:0005-8025    

DOI:10.1002/ctpp.19780180603

出版商:WILEY‐VCH Verlag    

年代:1978

数据来源: WILEY

摘要:

AbstractA nonlinear theory of the interaction of an external pump field with ion‐acoustic and h.f. surface waves in a plasma layer with inhomogeneous boundary regions is presented for the case, when the pump field frequency is less than the electron plasma frequency. The evolution of the parametrically excited turbulence and its stationary state are both analytically treated and numerically demonstrated. Dependent on the pump field strength, two mechanisms are to be distinguished: (i) nonlinear generation of damped ion‐acoustic harmonics, (ii) cascade excitation of secondary eigenmodes by growing surface oscillations. At only slight overthreshold values, mechanism (i) is responsible for the occurence of the steady state, whereas, for higher pump field strength, the wave amplitudes as well as their saturated levels are mainly determined by mechanism (

ISSN:0005-8025    

DOI:10.1002/ctpp.19780180604

出版商:WILEY‐VCH Verlag    

年代:1978

数据来源: WILEY

ISSN:0005-8025    

DOI:10.1002/ctpp.19780180601

出版商:WILEY‐VCH Verlag    

年代:1978

数据来源: WILEY