Relaxation of pressure anisotropy due to Alfven-ion-cyclotron fluctuations observed in ion-cyclotron-range-of-frequency--heated mirror plasmas

Journal Article · Mon May 03 04:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.70.2734· OSTI ID:6607847

Ichimura, M; Inutake, M; Katsumata, R; Hino, N; Hojo, H; Ishii, K; Tamano, T; Miyoshi, S ^[1]

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1. Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305 (Japan)

Alfven-ion-cyclotron modes are generated over a wide range of anisotropy parameter [beta][sub [perpendicular]]([ital T][sub [perpendicular]]/[ital T][sub [parallel]])[sup 2] in ICRF-heated central cell plasmas of the GAMMA 10 tandem mirror. The fluctuations are observed at a small driving force in the convectively unstable region predicted theoretically in an infinite plasma. Before reaching the [beta] limit of [beta][sub [perpendicular]]=3.52[times]([ital T][sub [parallel]]/[ital T][sub [perpendicular]])[sup 2], above which the absolute instability is predicted, relaxation of pressure anisotropy is observed for the first time by use of an array of diamagnetic loops together with a Faraday cup and secondary-electron emission detectors.

• OSTI ID: 6607847
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 70:18; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700320 -- Plasma Diagnostic Techniques & Instrumentation-- (1992-)
700340* -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
700350 -- Plasma Production
Heating
Current Drive
& Interactions-- (1992-)
ABSOLUTE INSTABILITIES
ALFVEN WAVES
ANISOTROPY
BEAM MONITORS
BETA RATIO
BREMSSTRAHLUNG
CYCLOTRON RADIATION
DIAMAGNETISM
ELECTROMAGNETIC RADIATION
ELECTRON EMISSION
EMISSION
FARADAY CUPS
FLUCTUATIONS
HEATING
HIGH-FREQUENCY HEATING
HYDROMAGNETIC WAVES
ICR HEATING
INSTABILITY
ION WAVES
MAGNETIC MIRRORS
MAGNETISM
MEASURING INSTRUMENTS
MONITORS
OPEN PLASMA DEVICES
PLASMA
PLASMA DIAGNOSTICS
PLASMA HEATING
PLASMA INSTABILITY
PLASMA WAVES
RADIATION DETECTORS
RADIATIONS
SECONDARY EMISSION
TANDEM MIRRORS
THERMONUCLEAR DEVICES
VARIATIONS