Application of Collective Thomson Scattering Diagnosing Fast Ions in Plasmas by Collective Thomson Scattering of MM Waves (小特集 磁場閉じ込め高温プラズマにおけるレーザー応用プラズマ計測の最近の進展) -- (レーザートムソン散乱)

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概要

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• Magnetically confined fusion plasmas contain highly non-thermal populations of energetic ions resulting from fusion reactions and plasma heating. Non-linear wave particle interaction affects both bulk plasma and fast ion dynamics, and can lead to catastrophic loss of confinement. This interaction is also the basis of heating by radio wave absorption. In both cases the wave particle interaction depends critically on the phase space distribution of the energetic ions. Fast ions are notoriously illusive to experimental observation. They do not interact strongly with electromagnetic radiation but they do draw a wake in the electron distribution, detectable by Collective Thomson Scattering (CTS). From this the velocity distributions can be inferred, just as the position and speed of a swan is evident from its wake on a lake. The first CTS measurements of MeV ions [H. Bindslev et al, Phys. Rev. Lett. 83, 3206 (1999)] are reviewed here along with an outline of the current fast ion CTS program using mm-waves and a discussion of the technique. The physics issues we are pursuing included the vexed question of whether energetic ions are expelled from the core by magneto-hydro-dynamic relaxations (sawteeth).

• 社団法人プラズマ・核融合学会の論文
• 2000-09-25

著者

• Bindslev Henrik

  Fom Instituut Voor Plasmafysica Rijnhuizen

関連論文

• Application of Collective Thomson Scattering Diagnosing Fast Ions in Plasmas by Collective Thomson Scattering of MM Waves (小特集 磁場閉じ込め高温プラズマにおけるレーザー応用プラズマ計測の最近の進展) -- (レーザートムソン散乱)

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