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Effects of ICRH on the dynamics of fast particle excited alfven eigenmodes
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics. KTH, School of Electrical Engineering (EES), Centres, Alfvén Laboratory Centre for Space and Fusion Plasma Physics.
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics. KTH, School of Electrical Engineering (EES), Centres, Alfvén Laboratory Centre for Space and Fusion Plasma Physics.
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics. KTH, School of Electrical Engineering (EES), Centres, Alfvén Laboratory Centre for Space and Fusion Plasma Physics.
2007 (English)In: Radio Frequency Power in Plasmas, American Institute of Physics (AIP), 2007, Vol. 933, p. 455-458Conference paper, Published paper (Refereed)
Abstract [en]

ICRH is often used in experiments to simulate destabilization of Alfvén eigenmodes by thermonuclear α-particles. Whereas the slowing down distribution of α-particles is nearly isotropic, the ICRH creates an anisotropic distribution function with non-standard orbits. The ICRH does not only build up gradients in phase space, which destabilizes the AEs, but it also provides a strong phase decorrelation mechanism between ions and AEs. Renewal of the distribution function by thermonuclear reactions and losses of α-particles to the wall lead to a continuous drive of the AEs. Simulations of the non-linear dynamics of AEs and the impact they have on the heating profile due to particle redistribution are presented.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2007. Vol. 933, p. 455-458
Series
AIP Conference Proceedings, ISSN 0094-243X ; 933
Keywords [en]
toroidal alfven eigenmodes, alpha-particles, ICRH, monte-carlo method, SELFO
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-25593DOI: 10.1063/1.2800530ISI: 000251153300091Scopus ID: 2-s2.0-36849030205ISBN: 978-073540444-1 ISBN: 0735404445 (print)OAI: oai:DiVA.org:kth-25593DiVA, id: diva2:370579
Conference
17th Topical Conference on Radio Frequence Power in Plasmas Clearwater, FL, MAY 07-09, 2007, United States
Note

QC 20101117

Available from: 2010-11-17 Created: 2010-10-27 Last updated: 2022-06-25Bibliographically approved

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Bergkvist, TommyHellsten, TorbjörnHolmström, Kerstin
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CiteExportLink to record
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