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Alpha-tail production with ion-cyclotron-resonance heating of He-4-beam ions in JET plasmas
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2002 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 88, no 10Article in journal (Refereed) Published
Abstract [en]

Third-harmonic ion-cyclotron-resonance heating of He-4-beam ions has produced for the first time on the JET tokamak high-energy populations of He-4 ions to simulate 3.5 MeV fusion-born alpha (alpha) particles. Acceleration of He-4 ions to the MeV energy range is confirmed by gamma-ray emission from the nuclear reaction Be-9(alpha, ngamma) C-12 and excitation of Alfven eigenmodes. Concomitant electron heating and sawtooth stabilization are observed. The scheme could be used in next-step tokamaks to gain information on trapped alpha particles and to test a diagnostics in the early nonactivated phase of operation.

Place, publisher, year, edition, pages
2002. Vol. 88, no 10
Keyword [en]
toroidal alfven eigenmodes, deuterium-tritium plasmas, fusion test reactor, dt plasmas, tokamak plasma, icrf waves, performance, particles, tftr
Identifiers
URN: urn:nbn:se:kth:diva-21379DOI: 10.1103/PhysRevLett.88.105002ISI: 000174342000034OAI: oai:DiVA.org:kth-21379DiVA: diva2:340077
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Hellsten, Torbjörn A. K.
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