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Fast measurements of the electron temperature in divertor region of the COMPASS tokamak using ball-pen probe

SYSNO ASEP	0453933
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	Conference Paper
Title	Fast measurements of the electron temperature in divertor region of the COMPASS tokamak using ball-pen probe
Author(s)	Adámek, Jiří (UFP-V)_{RID, ORCID} Seidl, Jakub (UFP-V)_RID Pánek, Radomír (UFP-V)_RID Komm, Michael (UFP-V)_{RID, ORCID} Vondráček, Petr (UFP-V)_{RID, ORCID} Stöckel, Jan (UFP-V)_RID
Source Title	EPS 2015:42nd European Physical Society Conference on Plasma Physics, 39E. - Mulhouse : European Physical Society, 2015 - ISBN 2-914771-98-3
Pages	p4.101-p4.101, p4.101
Number of pages	4 s.
Publication form	Online - E
Action	EPS 2015 Conference on Plasma Physics/42./
Event date	22.06.2015-26.06.2015
VEvent location	Lisbon
Country	PT - Portugal
Event type	EUR
Language	eng - English
Country	PT - Portugal
Keywords	plasma ; tokamak
Subject RIV	BL - Plasma and Gas Discharge Physics
R&D Projects	GA15-10723S GA ČR - Czech Science Foundation (CSF)
	LM2011021 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UFP-V - RVO:61389021
EID SCOPUS	84979703315
Annotation	The electron temperature in divertor regions of present day devices is typically measured by swept Langmuir probes or triple probe technique. However, the measurement of its evolution during ELM filaments requires high temporal resolution, which has not been achieved by these techniques yet. Alternative option how to determine the electron temperature with high time resolution is to use direct measurements of the plasma and floating potentials. The electron temperature is consequently determined from the difference of both potentials normalized by the proper coefficient for specific gas and magnetic field. The floating potential is routinely measured by Langmuir probe and the plasma potential can be directly measured by ball-pen probe (BPP). Recently, a new array of BPPs and dome-shaped Langmuir probes was installed also in a divertor target of the COMPASS tokamak.
Workplace	Institute of Plasma Physics
Contact	Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975
Year of Publishing	2016

Number of the records: 1