Alpha particle slowing-down characteristics and the effect on MHD instability excitation at high-density operation points in FFHRs

Hideaki Matsuura, Osamu Mitarai, Akio Sagara, Yasuyuki Nakao

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Alpha-particle slowing-down behaviors at low-temperature, high-density operation points in force-free helical reactors (FFHRs) are examined on the basis of a Fokker-Planck (FP) simulation that simultaneously consider the balance among generation, slowing down, and loss from the plasma in parallel with the density dependence of the Alfv́en speed. An accurate treatment of the boundary velocity region between thermal and non-thermal components is shown to be important in evaluating the alpha particle population that can induce instability. In a typical high-density, low-temperature operation point in an FFHR, this population is reduced.

Original languageEnglish
Article number2403085
JournalPlasma and Fusion Research
Volume6
Issue number1 SPECIAL ISSUE
DOIs
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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