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ADVANCES IN LANGMUIR PROBE DIAGNOSTICS OF THE PLASMA POTENTIAL AND ELECTRON-ENERGY DISTRIBUTION FUNCTION IN FUSION PLASMAS (IWSSPP 2016)

SYSNO ASEP	0461433
Document Type	A - Abstract
R&D Document Type	The record was not marked in the RIV
R&D Document Type	Není vybrán druh dokumentu
Title	ADVANCES IN LANGMUIR PROBE DIAGNOSTICS OF THE PLASMA POTENTIAL AND ELECTRON-ENERGY DISTRIBUTION FUNCTION IN FUSION PLASMAS (IWSSPP 2016)
Author(s)	Popov, Tsv.K. (BG) Dimitrova, Miglena (UFP-V)_ORCID Ivanova, P. (BG) Kovacic, J. (SI) Gyergyek, T. (SI) Dejarnac, Renaud (UFP-V)_{RID, ORCID} Stöckel, Jan (UFP-V)_RID Pedrosa, M.A. (ES) Lopez-Bruna, D. (ES) Hidalgo, C. (ES) Pánek, Radomír (UFP-V)_RID
Source Title	Proceedings of the 7th International Workshop and Summer School on Plasma Physics (IWSSPP 2016). - Sofia : University of Sofia, 2016 - ISBN N S. 15
Number of pages	1 s.
Publication form	Print - P
Language	eng - English
Country	BG - Bulgaria
Keywords	Advanced Langmuir probe techniques ; triple probe ; first-derivative probe technique ; plasma potential ; electron energy distribution function ; electron temperatura and density
Subject RIV	BL - Plasma and Gas Discharge Physics
Institutional support	UFP-V - RVO:61389021
Annotation	Advanced Langmuir probe techniques are reviewed for evaluating the plasma potential and electron-energy distribution function (EEDF) in magnetized plasma. The classical, the triple probe and the first-derivative probe technique (FDPT) are discussed. The FDPT was applied to derive data for plasma parameters from the IV probe characteristics measured in the plasma boundary region in the COMPASS and ISTTOK tokamaks, as well as in the TJ-II stellarator. In the COMPASS tokamak in the vicinity of the last closed flux surface (LCFS) the EEDF is bi-Maxwellian with the low-temperature electron fraction predominating over the higher temperature one, whereas in the far scrape off layer (SOL) the EEDF is Maxwellian. The comparison of the results from probe measurements with the ASTRA package and EIRENE code calculations suggests that the main reason of the appearance of a bi-Maxwellian EEDF in the vicinity of the LCFS is the ionization of the neutral atoms. In the SOL the radial distribution of the parallel power flux density is a double exponential. In the calculations of the parallel power flux density the energy losses from inelastic processes must be taken into account.
Workplace	Institute of Plasma Physics
Contact	Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975
Year of Publishing	2017

Number of the records: 1