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Reynolds stress and fluctuation measurements with Langmuir and ball-pen probes in the vicinity of the L-H transition on COMPASS.
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SYSNO ASEP 0482694 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Reynolds stress and fluctuation measurements with Langmuir and ball-pen probes in the vicinity of the L-H transition on COMPASS. Tvůrce(i) Grover, Ondřej (UFP-V) ORCID
Seidl, Jakub (UFP-V) RID
Adámek, Jiří (UFP-V) RID, ORCID
Vondráček, Petr (UFP-V) RID, ORCID
Tomeš, Matěj (UFP-V)
Weinzettl, Vladimír (UFP-V) RID, ORCID
Hron, Martin (UFP-V) RID, ORCID
Pánek, Radomír (UFP-V) RIDČíslo článku P2.181 Zdroj.dok. EPS 2017: 44th European Physical Society Conference on Plasma Physics, 41F. - Mulhouse : European Physical Society, 2017 / Fajardo M. ; Westerhof E. ; Riconda C. ; Melzer A. ; Bret A. ; Dromey B. - ISBN 979-10-96389-07 Poč.str. 4 s. Forma vydání Online - E Akce EPS 2017 Conference on Plasma Physics/44./ Datum konání 26.06.2017 - 30.06.2017 Místo konání Belfast Země IE - Irsko Typ akce EUR Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova COMPASS ; Reynolds stress (RS) ; Langmuir probes Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) CEP GA16-25074S GA ČR - Grantová agentura ČR GA15-10723S GA ČR - Grantová agentura ČR 8D15001 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy LM2015045 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UFP-V - RVO:61389021 Anotace The Reynolds stress force ¶rh˜ vp ˜ vri due to the Reynolds stress (RS) h˜ vp ˜ vri has been identified in recent models and experiments [1] as a likely driver of poloidal zonal flows which are expected to play a key role in the L-H transition and the associated limit cycle oscillations (LCO) [2] in the predator-prey-like interaction of zonal flows with turbulence.
One common method of measuring the RS is to measure fluctuations of electric fields with arrays of Langmuir probes. However, such measurements may be influenced by the fluctuations of the electron temperature. Similar probe head arrangements have been also used to investigate the dynamics of density fluctuations and electric fields during LCO [2]. In order to investigate
the role of temperature fluctuations and LCO dynamics, two similar probe heads equipped with both Langmuir (LP) and ball-pen (BPP) [3] probes in similar geometric configurations were developed, installed and used at the COMPASS tokamak [4]. This contribution reports on the results of measurements with these probe heads, specifically on the comparison of RS profiles
obtained with BPP and LP and the investigation of limit cycle oscillations during the L-H transition on COMPASS.Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2018
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