Ambipolar potential effect on a drift-wave mode in a tandem-mirror plasma

Journal Article · Mon May 07 04:00:00 EDT 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.2281· OSTI ID:6799960

Mase, A; Jeong, J H; Itakura, A; Ishii, K; Inutake, M; Miyoshi, S ^[1]

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

The {bold k}-{omega} spectra of low-frequency waves which exist in a tandem-mirror plasma are observed by using the Fraunhofer-diffraction method. The observed dispersion relations are in good agreement with those of drift waves including a Doppler shift due to {bold E}{times}{bold B} rotation velocity. The fluctuation level is observed to depend sensitively on the radial profile of a plasma potential. It has a maximum value when a slightly negative electric field is formed, and decreases with increase in an electric field regardless of its sign.

• OSTI ID: 6799960
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 64:19; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
AMBIPOLAR DIFFUSION
DATA
DIFFUSION
DISPERSION RELATIONS
DOPPLER EFFECT
DRIFT INSTABILITY
ECR HEATING
EXPERIMENTAL DATA
FLUCTUATIONS
HEATING
HIGH-FREQUENCY HEATING
INFORMATION
INSTABILITY
MAGNETIC MIRRORS
MOTION
NUMERICAL DATA
OPEN PLASMA DEVICES
PLASMA DENSITY
PLASMA HEATING
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
POTENTIALS
ROTATION
TANDEM MIRRORS
THERMAL BARRIERS
THERMONUCLEAR DEVICES
VARIATIONS