UV-induced Coulomb structure in discharge plasma

Citation
Aa. Samarian et Os. Vaulina, UV-induced Coulomb structure in discharge plasma, PHYS LETT A, 278(3), 2000, pp. 146-151
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS A
ISSN journal
0375-9601 → ACNP
Volume
278
Issue
3
Year of publication
2000
Pages
146 - 151
Database
ISI
SICI code
0375-9601(200012)278:3<146:UCSIDP>2.0.ZU;2-4
Abstract
A Coulomb structure of dust particles in the anode region of a dc abnormal glow discharge have been observed. A dust cloud of several tens of particle s formed above the central part of the anode. An analysis of the experiment al conditions revealed that these particles are positively charged in contr ast to other experiments on the levitation of dust particles in gas-dischar ge plasma. An estimate of the particle charge taking into account processes of photoemission and secondary electron emission from their surface shows that the general contribution to particle charging is photoemission by disc harge self-radiation in the UV region. (C) 2000 Elsevier Science B.V. All r ights reserved.