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A new probe for ion temperature measurements in the tokamak scrape-off layer
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SYSNO ASEP 0031054 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title A new probe for ion temperature measurements in the tokamak scrape-off layer Title Nová sonda pro měření iontové teploty v okrajovém plazmatu tokamaku Author(s) Kočan, M. (SK)
Pánek, Radomír (UFP-V) RID
Gunn, J. P. (FR)
Stöckel, Jan (UFP-V) RID
Skalný, J. D. (SK)Source Title Proceedings of 32nd EPS Conference on Plasma Physics. - Tarragona : European Physical Society, 2005 / Milligen B. Ph. ; Hidalgo C. - ISBN 2-914771-24-X Pages p-2.082 Number of pages 8 KB Publication form CD-ROM - CD-ROM Action EPS Conference on Plasma Physics/32nd./ Event date 27.06.2005-01.07.2005 VEvent location Tarragona Country ES - Spain Event type WRD Language eng - English Country ES - Spain Keywords probes in plasma ; ion temperature ; edge plasma Subject RIV BL - Plasma and Gas Discharge Physics R&D Projects GP202/03/P062 GA ČR - Czech Science Foundation (CSF) GA202/03/0786 GA ČR - Czech Science Foundation (CSF) Annotation Ion temperature in the tokamak scrape-off layer (SOL) is notoriously difficult tomeasure and thus rarely available. A new kind of the robust Langmuir probe, the so-called segmented tunnel probe, was designed for this purpose. We show, that the ion distribution along the tunnel decays with a characteristic scale length, which is a function of the ion temperature. Therefore, by dividing the tunnel into two segments, the ion temperature can be found from the ratio of ion current to the first and the second segment. The advantage is that the probe is operated in DC mode and thus provides fast measurements of ion temperature as well as of the parallel ion current density. We present preliminary results of the numerical simulations and the experimental testing of the STP prototype at CASTOR tokamak. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2006
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