Probe Measurements of Electron Energy Distributions in a Magnetized Plasma of the Toroidal Device “BLAAMANN”
作者:
V. Demidov,
R. Armstrong,
A. Fredriksen,
期刊:
Contributions to Plasma Physics
(WILEY Available online 1998)
卷期:
Volume 38,
issue S1
页码: 1-6
ISSN:0863-1042
年代: 1998
DOI:10.1002/ctpp.19980380105
出版商: WILEY‐VCH Verlag
数据来源: WILEY
摘要:
AbstractThe probe‐current densitiesjand their firstj' and secondjderivatives with respect to the probe potentials in magnetized plasmas of the toroidal device “Blaamann” have been measured. For analysis of data a kinetic probe theory was used. The comparison of measured and calculatedjandj' shows that electron energy distributions in the plasmas are close to Maxwellian and allows us to calculate electron temperatures and densities. Application of the Langmuir probe theory for unmagnetized plasmas for investigated conditions gives too high electron temperatures (up to 30–40%) and too low densities (with factor from 3 to 10). The measured and calculatedjhave more complicated structure (they may have additional maximums) than in the case of unmagnetized plasmas. The possibility of direct probe measurements of ion energy distributions in the magnetized plasma is di
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