Published July 1999 | Version v1
Journal article Metadata-only

Energetic-Ion-Driven Toroidal Alfvacute en Eigenmodes Observed in a Heliotron/Torsatron Plasma

Creators

  • 1. Department of Energy Engineering Science, Nagoya University, Nagoya 464-8601 (Japan)
  • 2. National Institute for Fusion Science, Toki 509-5292 (Japan)
  • 3. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
  • 4. Department of Fusion Science, Graduate University for Advanced Studies, Toki 509-5292 (Japan)

Description

Toroidal Alfvacute en eigenmodes (TAEs) of low toroidal mode number, n=1 and 2, are observed in neutral-beam-heated plasmas in the compact helical system heliotron/torsatron. The observed frequency is proportional to the computed TAE frequency and lies near the lower bound of the innermost TAE gap. The modes are excited only when the beam velocity exceeds about half the central Alfvacute en velocity and when the net plasma current induced by coinjected neutral beams is in the required range. The modes are localized in the plasma core region, between 0.2 and 0.6 of the plasma minor radius. copyright 1999 The American Physical Society

Additional details

Publishing Information

Journal Title
Physical Review Letters
Journal Volume
83
Journal Issue
2
Journal Page Range
p. 312-315
ISSN
0031-9007
CODEN
PRLTAO

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
30046265
Subject category
S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
Descriptors DEI
ALFVEN WAVES; BEAM-PLASMA SYSTEMS; HELIOTRON; HYDROGEN; THERMONUCLEAR REACTORS; TOROIDAL CONFIGURATION; TORSATRON STELLARATORS
Descriptors DEC
ANNULAR SPACE; CLOSED CONFIGURATIONS; CLOSED PLASMA DEVICES; CONFIGURATION; ELEMENTS; HYDROMAGNETIC WAVES; MAGNETIC FIELD CONFIGURATIONS; NONMETALS; SPACE; STELLARATORS; THERMONUCLEAR DEVICES