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Plasma interaction with tungsten samples in the COMPASS tokamak in ohmic ELMy H-modes
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SYSNO ASEP 0460257 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Plasma interaction with tungsten samples in the COMPASS tokamak in ohmic ELMy H-modes Tvůrce(i) Dimitrova, Miglena (UFP-V) ORCID
Weinzettl, Vladimír (UFP-V) RID, ORCID
Matějíček, Jiří (UFP-V) RID, ORCID
Popov, T. (BG)
Marinov, S. (BG)
Costea, S. (AT)
Dejarnac, Renaud (UFP-V) RID, ORCID
Stöckel, Jan (UFP-V) RID
Havlíček, Josef (UFP-V) RID, ORCID
Pánek, Radomír (UFP-V) RIDZdroj.dok. Journal of Physics Conference Series, 700. - Bristol : IOP Publishing, Ltd., 2016 - ISSN 1742-6588 Rozsah stran s. 012008 Poč.str. 5 s. Forma vydání Online - E Akce International Summer School on Vacuum, Electron and Ion Technologies/19./ Datum konání 21.09.2015 - 25.09.2015 Místo konání Sozopol Země BG - Bulharsko Typ akce WRD Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Divertor probes ; H-mode ; tungsten samples ; electron energy distribution function ; parallel power flux density Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) CEP GA14-12837S GA ČR - Grantová agentura ČR LM2011021 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UFP-V - RVO:61389021 UT WOS 000432421500008 EID SCOPUS 84964843964 DOI 10.1088/1742-6596/700/1/012008 Anotace This paper reports experimental results on plasma interaction with tungsten samples with or without pre-grown He fuzz. Under the experimental conditions, arcing was observed on the fuzzy tungsten samples, resulting in localized melting of the fuzz structure that did not extend into the bulk. The Langmuir probes embedded in the divertor tiles on the COMPASS tokamak were used to measure a current-voltage probe characteristics, during ohmic ELMy H-modes reached in deuterium plasmas at a toroidal magnetic field 1.15 T, plasma current 300 kA and line-averaged electron density 5×1019 m−3. The data obtained between the ELMs were processed by the recently published first-derivative probe technique for precise determination of the plasma potential and the electron energy distribution function (EEDF).
The spatial profile of the EEDF shows that at the high-field side it is Maxwellian with a temperature of 5 – 10 eV. The electron temperatures and the ion-saturation current density obtained were used to evaluate the radial distribution of the parallel power flux density as being in the order of 0.05 – 7 MW/m2.
Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2017
Počet záznamů: 1