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Title: RF heating for fusion product studies

Third harmonic cyclotron heating is an effective tool for accelerating deuterium (D) beams to the MeV energy range, suitable for studying ITER relevant fast particle physics in plasmas without significant tritium content. Such experiments were recently conducted in JET with an ITER like wall in D plasmas with {sup 3}He concentrations up to 30% in order to boost the fusion reactivity by D-{sup 3}He reactions. The harmonic cyclotron heating produces high-energy tails in the MeV range of D ions by on-axis heating and of {sup 3}He ions by tangential off-axis heating. The discharges are characterized by long sawtooth free periods and a rich spectrum of MHD modes excited by the fast D and {sup 3}He ions. The partitions of the power, which depend on the distribution function of D, vary strongly over several slowing down times. Self-consistent modelling of the distribution function with the SELFO-light code are presented and compared with experimental data from fast particle diagnostics.
Authors:
;  [1] ; ; ;  [2] ;  [3] ;  [4] ;  [5] ;  [6]
  1. Dept. of Fusion Plasma Physics, School of Electrical Engineering, KTH, Stockholm (Sweden)
  2. CCFE Fusion Association, Culham Science Centre Abingdon (United Kingdom)
  3. Dept. of Physics and Astronomy, Uppsala University (Sweden)
  4. Catalan Institution for Research and Advanced Studies, Barcelona (Spain)
  5. IRFM-CEA, Saint-Paul-Lez Durance (France)
  6. FOM Inst. DIFFER, Nieuwegein (Netherlands)
Publication Date:
OSTI Identifier:
22496205
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1689; Journal Issue: 1; Conference: 21. topical conference on radio frequency power in plasmas, Lake Arrowhead, CA (United States), 27-29 Apr 2015; Other Information: (c) 2015 EURATOM; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; CONCENTRATION RATIO; DEUTERIUM; DISTRIBUTION FUNCTIONS; HELIUM 3; HELIUM IONS; ICR HEATING; ITER TOKAMAK; MAGNETOHYDRODYNAMICS; MEV RANGE; PARTICLES; PLASMA; PLASMA INSTABILITY; RADIOWAVE RADIATION; S CODES; SAWTOOTH OSCILLATIONS; SLOWING-DOWN; SPECTRA; TRITIUM