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Effect of misaligned edges and magnetic field orientation on plasma deposition into gaps during ELMs on ITER
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SYSNO ASEP 0352655 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Effect of misaligned edges and magnetic field orientation on plasma deposition into gaps during ELMs on ITER Author(s) Dejarnac, Renaud (UFP-V) RID, ORCID
Komm, Michael (UFP-V) RID, ORCID
Gunn, J. P. (FR)
Pekarek, Z. (CZ)Source Title Journal of Nuclear Materials. - : Elsevier - ISSN 0022-3115
Roč. 415, č. 1 (2011), S977-S980Number of pages 4 s. Publication form web - web Action International Conference on Plasma-Surface Interactions in Controlled Fusion (PSI19)/19th./ Event date 24.05.2010-28.05.2010 VEvent location San Diego Country US - United States Event type WRD Language eng - English Country NL - Netherlands Keywords Edge modeling ; Plasma-wall interactions ; ITER ; Sheaths ; ELMs Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders CEZ AV0Z20430508 - UFP-V (2005-2011) UT WOS 000298128100221 DOI 10.1016/j.jnucmat.2010.09.042 Annotation In tokamaks, where possible in areas of high conducted heat flux flowing parallel to magnetic field lines (for example in the divertor strike point vicinity), surfaces are oriented with glancing angles to the magnetic field in order to spread the power over the widest possible area. As a consequence of grazing angles, any protruding edges on these surfaces (due for example to mechanical misalignment) can lead to serious power overload and therefore to rapid damage. Using particle-in-cell simulations, power fluxes impinging on the gaps between misaligned edges due to Edge Localised Mode transients have been evaluated and are presented in this paper. The results of the computations show that the power deposited to the protruding edges is lower than the one expected without taking into account particle orbits. Particle fluxes inside a gap are also investigated as a function of the field line orientation with respect to the gap direction. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2012
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