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Centroid drift velocity of electron swarms in gases
Author(s) -
Sugawara Hirotake,
Tagashira Hiroaki,
Sakai Yosuke
Publication year - 1998
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/(sici)1520-6416(19980115)122:1<1::aid-eej1>3.0.co;2-b
Subject(s) - centroid , electron , drift velocity , ionization , moment (physics) , atomic physics , physics , propagator , computational physics , classical mechanics , nuclear physics , mathematics , geometry , quantum mechanics , ion
A new evaluation technique for the centroid drift velocity W r of isolated electron swarms in gases is proposed based on moment equations. In addition to the average velocity W v of the individual electrons in an electron swarm, W r has another velocity component due to effects of ionization and electron attachment. Mechanisms that cause the difference between W r and W v are illustrated, and quantitatively demonstrated by simulations using a propagator method. The effects of ionization and electron attachment on W r are analyzed in detail by introducing the moment generation rate as a key quantity to categorize the effects. © 1998 Scripta Technica. Electr Eng Jpn, 122(1): 1–7, 1998