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Der zeitliche Verlauf einer Elektronenstrahl‐gesteuerten Hochdruckentladung in CO 2 ‐Lasergasgemischen
Author(s) -
Albrecht H.,
Gündel H.,
Seliger K.
Publication year - 1984
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.19840240407
Subject(s) - recombination , atomic physics , plasma , electric field , laser , ignition system , materials science , nitrogen , electron , chemistry , analytical chemistry (journal) , thermodynamics , physics , optics , nuclear physics , chromatography , biochemistry , organic chemistry , quantum mechanics , gene
The 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 CO 2 ‐discharges such a behaviour could not be observed. Moreover, it has been found that CO 2 ‐discharges are stable only as long as they are recombination determined. These results are supported by additional investigations in N 2 —CO 2 ‐mixtures. Some conclusions according to the operation of tunable high pressure lasers are given.