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Interferometrische Bestimmung der Gastemperatur in der Stickstoffniederdruckentladung
Author(s) -
Krysmanski K. H.,
Walter W.
Publication year - 1978
Publication title -
beiträge aus der plasmaphysik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0005-8025
DOI - 10.1002/ctpp.19780180602
Subject(s) - analytical chemistry (journal) , torr , spectrograph , rotational temperature , atomic physics , chemistry , nitrogen , radius , materials science , physics , spectral line , thermodynamics , chromatography , computer security , organic chemistry , astronomy , molecule , computer science
A 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 of N 2 ‐ and N 2 + ‐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 column was added.