Fast-time-resolution charge-exchange measurements during the ‘fishbone’ instability in the poloidal divertor experiment

P. Beiersdorfer, R. Kaita, Robert James Goldston

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

Measurements of fast-ion losses due to the ‘fishbone’ instability during high-βTq neutral-beam-heated discharges in the Poloidal Divertor Experiment have been made using two new vertical-viewing charge-exchange analysers. The measurements show that the instability has an n = 1 toroidal mode number, and that it ejects beam ions in a toroidally rotating bacon directed outward along a major radius. Observations of ejected ions with energies up to twice the beam injection energy at R ≈ Ro + a indicate the presence of a non-µ-conserving acceleration mechanism.

Original languageEnglish (US)
Pages (from-to)487-491
Number of pages5
JournalNuclear Fusion
Volume24
Issue number4
DOIs
StatePublished - Apr 1984

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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