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Plasma potential and electron temperature evaluated by ball-pen and Langmuir probes in the COMPASS tokamak.
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SYSNO ASEP 0480361 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Plasma potential and electron temperature evaluated by ball-pen and Langmuir probes in the COMPASS tokamak. Author(s) Dimitrova, Miglena (UFP-V) ORCID
Popov, Tsv.K. (BG)
Adámek, Jiří (UFP-V) RID, ORCID
Kovačič, J. (SI)
Ivanova, P. (BG)
Hasan, E. (BG)
López-Bruna, D. (ES)
Seidl, Jakub (UFP-V) RID
Vondráček, Petr (UFP-V) RID, ORCID
Dejarnac, Renaud (UFP-V) RID, ORCID
Stöckel, Jan (UFP-V) RID
Imríšek, Martin (UFP-V) RID
Pánek, Radomír (UFP-V) RIDArticle number 125001 Source Title Plasma Physics and Controlled Fusion. - : Institute of Physics Publishing - ISSN 0741-3335
Roč. 59, č. 12 (2017)Number of pages 10 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords Plasma potential ; electron temperature ; bi-Maxwellian EEDF ; ball-pen probe ; Langmuir probe ; COMPASS tokamak ; last closed flux surface Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects GA15-10723S GA ČR - Czech Science Foundation (CSF) LM2015045 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFP-V - RVO:61389021 UT WOS 000425787400001 EID SCOPUS 85034588487 DOI 10.1088/1361-6587/aa8689 Annotation The radial distributions of the main plasma parameters in the scrape-off-layer of the COMPASS tokamak are measured during L-mode and H-mode regimes by using both Langmuir and ball-pen probes mounted on a horizontal reciprocating manipulator. The radial profile of the plasma potential derived previously from Langmuir probes data by using the first derivative probe technique is compared with data derived using ball-pen probes. A good agreement can be seen between the data acquired by the two techniques during the L-mode discharge and during the H-mode regime within the inter-ELM periods. In the vicinity of the last closed flux surface, where the electron energy distribution function is bi-Maxwellian, the ball-pen probe technique results are in agreement with the high-temperature components of the electron distribution only. We also discuss the application of relatively large Langmuir probes placed in parallel and perpendicularly to the magnetic field lines to studying the main plasma parameters. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2018
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