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First measurements of edge localized mode ion energies in the ASDEX Upgrade far scrape-off layer
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SYSNO ASEP 0363957 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title First measurements of edge localized mode ion energies in the ASDEX Upgrade far scrape-off layer Author(s) Kočan, M. (DE)
Herrmann, A. (DE)
Müller, H. W. (DE)
Rohde, V. (DE)
Eich, T. (DE)
Bernert, M. (DE)
Carpentier-Chouchana, S. (FR)
Gunn, J. P. (FR)
Kirk, A. (GB)
Komm, Michael (UFP-V) RID, ORCID
Pitts, R.A. (FR)Source Title Plasma Physics and Controlled Fusion. - : Institute of Physics Publishing - ISSN 0741-3335
Roč. 53, č. 6 (2011), 065002-065002Number of pages 15 s. Publication form web - web Language eng - English Country GB - United Kingdom Keywords RFA ; ELM ; SOL ; tokamak plasma ion temperature Subject RIV BL - Plasma and Gas Discharge Physics CEZ AV0Z20430508 - UFP-V (2005-2011) UT WOS 000290558900005 DOI 10.1088/0741-3335/53/6/065002 Annotation Using the retarding field analyzer technique, ion energies carried by edge localized mode (ELM) filaments have been measured for the first time in the far scrape-off layer (SOL) of the ASDEX Upgrade tokamak. Energies, Ei ELM, exceeding 160 eV have been found, 5–6 cm outside the separatrix, with a decay length of about 2 cm. The measured ELM particle ion temperature in the far SOL is in the range Ti ELM ≈ 50–80 eV, in good agreement with the predictions from two simple collisionless models of ELM parallel transport. In between ELMs, Ti ≈ Te ≈ 10 eV is observed in the far SOL, consistent with relatively strong ion–electron thermal coupling in this region. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2012
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