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A note on the Radial Extent of LH wave – tokamak SOL interaction
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SYSNO ASEP 0335833 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title A note on the Radial Extent of LH wave – tokamak SOL interaction Title Poznámka o radiálním průběhu útlumu dolnohybridní vlny nasledkem interakce plazmatu s elektrony okraje tokamaku Author(s) Fuchs, Vladimír (UFP-V) RID
Gunn, J. (FR)
Petržílka, Václav (UFP-V) RID, ORCID
Horáček, Jan (UFP-V) RID, ORCID
Seidl, Jakub (UFP-V) RID
Ekedahl, A. (FR)
Goniche, M. (FR)
Hillairet, J. (FR)Source Title Contributed Papers 36th European Physical Society Conference on Plasma Physics , 33E. - Sofia : European Physical Society, 2009 / Mateev M. ; Benova E. - ISBN 2-914771-61-4 Pages p-5.201 Number of pages 4 s. Publication form CD-R - CD-R Action European Physical Society Conference on Plasma Physics /36th./ Event date 29.06.2009-03.07.2009 VEvent location Sofia Country BG - Bulgaria Event type WRD Language eng - English Country BG - Bulgaria Keywords Lower hybrid wave ; tokamak ; plasma Subject RIV BL - Plasma and Gas Discharge Physics R&D Projects GA202/07/0044 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20430508 - UFP-V (2005-2011) Annotation The radial extent of Landau interaction of tokamak edge electrons with the lower hybrid (LH) antenna electric field is analyzed. The electron acceleration associated with the power absorption results in high power-flows along magnetic field lines toward tokamak vessel components causing their possible damage. It is therefore of some practical importance to understand the radial extent of the LH-generated fast electron population. The present-day understanding, based on 2-D PIC simulations in quiescent plasma, indicate a radial interaction zone of the order of a few millimeters adjacent to the grill mouth [1]. However, recent experimental results from retarding field analyzer measurements on Tore Supra (TS) have shown the existence of fast electrons as far as a few centimeters from the grill mouth [1], which exhibit temporal intermittency at a rate comparable with the detachment rate of relatively hot and dense plasma “blobs” from the main body of the plasma. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2010
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