Comparison of ICRF and NBI Heated Plasmas Performances in the JET ITER-Like Wall

0435792 - ÚFP 2015 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Mayoral, M.-L. - Pütterich, T. - Jacquet, P. - Lerche, E. - Van-Eester, D. - Bobkov, V. - Bourdelle, C. - Colas, L. - Czarnecka, A. - Mlynář, Jan - Neu, R. … celkem 12 autorů
Comparison of ICRF and NBI Heated Plasmas Performances in the JET ITER-Like Wall.
AIP Conference Proceedings. Vol. 1580. Melville: American Institute of Physics, 2014, s. 231-234. AIP Publishing, 1580. ISBN 978-0-7354-1210-1. ISSN 0094-243X.
[Topical conference on radio frequency power in plasmas/20./. Sorrento (IT), 25.06.2013-28.06.2013]
Institucionální podpora: RVO:61389021
Klíčová slova: JET * ITER-like wall * ICRF heating * impurities * sawtooth * simulation * transport
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
http://scitation.aip.org/content/aip/proceeding/aipcp/10.1063/1.4864530?ver=pdfcov

In this contribution we compare L-modes plasmas heated by ICRF or by Neutral Beam Injection (NET). ICRF heating as expected led to a much higher centrally peaked power deposition on the electrons and due to the central fast ion population to stronger sawtooth activity. Surprisingly, although a higher bulk radiation was observed during the ICRF phase, the thermal plasma energy was found similar for both cases, showing that a higher radiation inside the separatrix was not incompatible with an efficient central heating scheme. The higher radiation was attributed to the presence Tungsten (W). Tomographic inversion of SXR emissions allowed a precise observation of the sawtooth effect on the radiation pattern. W concentration profiles deconvolved from SXR emission showed the flattening of the profiles due to sawtooth for both heating and the peaking of the profiles in the NET case only hinting for extra transport effect in the ICRF case.
Trvalý link: http://hdl.handle.net/11104/0239599