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First simultaneous measurements of Reynolds stress with ball-pen and Langmuir probes

SYSNO ASEP	0476139
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	First simultaneous measurements of Reynolds stress with ball-pen and Langmuir probes
Author(s)	Grover, Ondřej (UFP-V)_ORCID Adámek, Jiří (UFP-V)_{RID, ORCID} Seidl, Jakub (UFP-V)_RID Devitre, A. (CR) Šos, Miroslav (UFP-V)_ORCID Vondráček, Petr (UFP-V)_{RID, ORCID} Bílková, Petra (UFP-V)_RID Hron, Martin (UFP-V)_{RID, ORCID}
Article number	063501
Source Title	Review of Scientific Instruments. - : AIP Publishing - ISSN 0034-6748 Roč. 88, č. 6 (2017)
Number of pages	8 s.
Publication form	Print - P
Language	eng - English
Country	US - United States
Keywords	COMPASS tokamak ; Electric field effects ; Electric fields ; Langmuir probes ; Magnetoplasma ; Ball-pen probes
Subject RIV	BL - Plasma and Gas Discharge Physics
OECD category	2.11 Other engineering and technologies
R&D Projects	GA15-10723S GA ČR - Czech Science Foundation (CSF)
	GA16-25074S GA ČR - Czech Science Foundation (CSF)
	LM2015045 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UFP-V - RVO:61389021
UT WOS	000404641300015
EID SCOPUS	85020257420
DOI	10.1063/1.4984240
Annotation	A new multi-pin probe head was installed and tested at the COMPASS tokamak. The probe head consists of several ball-pen and Langmuir probes in similar geometric configurations, which enables fast, simultaneous measurements of the radial and poloidal electric field components from differences of plasma or floating potentials using appropriately positioned ball-pen or Langmuir probes, respectively. The fast measurements of the radial electric field are compared with other methods of measuring selected frequency components of the radial electric field. The radial profiles of the Reynolds stress calculated from correlations of electric field fluctuations obtained by either probe type are compared along with their spectral composition. Lower Reynolds stress values are found for Langmuir probes in comparison to ball-pen probes due to negative contributions from higher frequency fluctuations possibly associated with electron temperature fluctuations.
Workplace	Institute of Plasma Physics
Contact	Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975
Year of Publishing	2018

Number of the records: 1