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Title: Whistler instability in an electron-cyclotron-resonance-heated, mirror-confined plasma

Abstract

The warm-electron-driven (2 keV) whistler electron microinstability (Phys. Rev. Lett. {bold 59}, 1821 (1987)) of the Constance {ital B} electron-cyclotron-resonance-heated (ECRH), quadrupole mirror-confined plasma experiment has been studied. Experiments show (i) that the instability comes in fairly regular bursts on axis and continuously in time off axis due to the minimum-{ital B} geometry, (ii) a frequency spectrum that is insensitive to changes in the plasma parameters, and (iii) instability-induced power losses which are not greater than 10% of the ECRH power input for the regimes studied. A linear perturbation analysis of the relativistic Vlasov equation together with Maxwell's equations has been made. Using the ECRH distribution function, a new distribution function well suited for describing ECRH, mirror-confined plasmas, the analysis shows the instability frequency spectrum to be insensitive to changes in cyclotron frequency, temperature, and density, in agreement with experimental results, and only sensitive to changes in ECRH frequency.

Authors:
; ; ; ;  [1]
  1. Plasma Fusion Center, Massachusetts Insitute of Technology, Cambridge, Massachusetts 02139 (US)
Publication Date:
OSTI Identifier:
6931582
DOE Contract Number:  
AC02-78ET51013
Resource Type:
Journal Article
Journal Name:
Physics of Fluids B; (USA)
Additional Journal Information:
Journal Volume: 2:2; Journal ID: ISSN 0899-8221
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; MAGNETIC MIRRORS; PLASMA MICROINSTABILITIES; WHISTLERS; BOLTZMANN-VLASOV EQUATION; ECR HEATING; ELECTROSTATIC ANALYZERS; ENERGY SPECTRA; PERTURBATION THEORY; PLASMA DIAGNOSTICS; QUADRUPOLES; RELATIVISTIC PLASMA; RF SYSTEMS; X-RAY EQUIPMENT; BEAM ANALYZERS; DIFFERENTIAL EQUATIONS; ELECTROMAGNETIC RADIATION; EQUATIONS; EQUIPMENT; HEATING; HIGH-FREQUENCY HEATING; INSTABILITY; MULTIPOLES; NOISE; OPEN PLASMA DEVICES; PARTIAL DIFFERENTIAL EQUATIONS; PLASMA; PLASMA HEATING; PLASMA INSTABILITY; RADIATIONS; RADIO NOISE; RADIOWAVE RADIATION; SPECTRA; THERMONUCLEAR DEVICES; 700102* - Fusion Energy- Plasma Research- Diagnostics

Citation Formats

Garner, R C, Mauel, M E, Hokin, S A, Post, R S, and Smatlak, D L. Whistler instability in an electron-cyclotron-resonance-heated, mirror-confined plasma. United States: N. p., 1990. Web. doi:10.1063/1.859234.
Garner, R C, Mauel, M E, Hokin, S A, Post, R S, & Smatlak, D L. Whistler instability in an electron-cyclotron-resonance-heated, mirror-confined plasma. United States. doi:10.1063/1.859234.
Garner, R C, Mauel, M E, Hokin, S A, Post, R S, and Smatlak, D L. Thu . "Whistler instability in an electron-cyclotron-resonance-heated, mirror-confined plasma". United States. doi:10.1063/1.859234.
@article{osti_6931582,
title = {Whistler instability in an electron-cyclotron-resonance-heated, mirror-confined plasma},
author = {Garner, R C and Mauel, M E and Hokin, S A and Post, R S and Smatlak, D L},
abstractNote = {The warm-electron-driven (2 keV) whistler electron microinstability (Phys. Rev. Lett. {bold 59}, 1821 (1987)) of the Constance {ital B} electron-cyclotron-resonance-heated (ECRH), quadrupole mirror-confined plasma experiment has been studied. Experiments show (i) that the instability comes in fairly regular bursts on axis and continuously in time off axis due to the minimum-{ital B} geometry, (ii) a frequency spectrum that is insensitive to changes in the plasma parameters, and (iii) instability-induced power losses which are not greater than 10% of the ECRH power input for the regimes studied. A linear perturbation analysis of the relativistic Vlasov equation together with Maxwell's equations has been made. Using the ECRH distribution function, a new distribution function well suited for describing ECRH, mirror-confined plasmas, the analysis shows the instability frequency spectrum to be insensitive to changes in cyclotron frequency, temperature, and density, in agreement with experimental results, and only sensitive to changes in ECRH frequency.},
doi = {10.1063/1.859234},
journal = {Physics of Fluids B; (USA)},
issn = {0899-8221},
number = ,
volume = 2:2,
place = {United States},
year = {1990},
month = {2}
}