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Electron energy distribution function, plasma potential and electron density measured by Langmuir probe in tokamak edge plasma

SYSNO ASEP	0334828
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Electron energy distribution function, plasma potential and electron density measured by Langmuir probe in tokamak edge plasma
Title	Elektronová energetická rozdělovací funkce, potenciál plazmaty a elektronová hustota měřená Langmuirovými sondami v okrajovém plazmatu tokamaků
Author(s)	Popov, Tsv.K. (BG) Ivanova, P. (BG) Stöckel, Jan (UFP-V)_RID Dejarnac, Renaud (UFP-V)_{RID, ORCID}
Source Title	Plasma Physics and Controlled Fusion. - : Institute of Physics Publishing - ISSN 0741-3335 Roč. 51, č. 6 (2009), 065014-065014
Number of pages	15 s.
Publication form	web - web
Language	eng - English
Country	GB - United Kingdom
Keywords	Probes ; First Derivative ; Distribution Function ; Plasma Potential ; Temperature
Subject RIV	BL - Plasma and Gas Discharge Physics
CEZ	AV0Z20430508 - UFP-V (2005-2011)
UT WOS	000266218300015
DOI	10.1088/0741-3335/51/6/065014
Annotation	The electron energy distribution function (EEDF) at different radial positions is derived from Langmuir probe measurements in the CASTOR tokamak edge plasma using the first derivative method. It is shown that the EEDFs are not Maxwellian but can be approximated as bi-Maxwellians with one dominant, low temperature electron population and one minority composed of hotter electrons. In the limiter shadow the measured EEDFs are Maxwellian. The values of the plasma potential and electron densities at different radial positions are also evaluated. The results presented in this paper demonstrate that the first derivative method allows one to acquire additional plasma parameters using the electron part of the current-voltage characteristics in strongly magnetized tokamak edge plasmas.
Workplace	Institute of Plasma Physics
Contact	Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975
Year of Publishing	2010

Number of the records: 1