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

Journal Article · Mon May 07 00:00:00 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), Vol. 64:19; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

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