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Title: Microinstability Studies for the Large Helical Device

Abstract

Fully kinetic assessments of the stability properties of toroidal drift modes have been obtained for cases for the Large Helical Device (LHD). This calculation employs the comprehensive linear microinstability code FULL, as recently extended for nonaxisymmetric systems. The code retains the important effects in the linearized gyrokinetic equation, using the lowest-order ''ballooning representation'' for high toroidal mode number instabilities in the electrostatic limit. These effects include trapped particles, FLR, transit and bounce and magnetic drift frequency resonances, etc., for any number of plasma species. Results for toroidal drift waves destabilized by trapped electrons and ion temperature gradients are presented, using numerically-calculated three-dimensional MHD equilibria. These are reconstructed from experimental measurements. Quasilinear fluxes of particles and energy for each species are also calculated. Pairs of LHD discharges with different magnetic axis positions and with and without pellet injection are compared.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab., NJ (US)
Sponsoring Org.:
USDOE Office of Science (US)
OSTI Identifier:
795722
Report Number(s):
PPPL-3661.pdf
TRN: US0201849
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Technical Report
Resource Relation:
Other Information: Supercedes report DE00795722; PBD: 28 Jan 2002; PBD: 28 Jan 2002
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ELECTROSTATICS; ION TEMPERATURE; KINETICS; PELLET INJECTION; PLASMA; STABILITY; TRAPPED ELECTRONS

Citation Formats

Rewoldt, G, Ku, L -P, Tang, W M, Sugama, H, Nakajima, N, Watanabe, K Y, Murakami, S, Yamada, H, and Cooper, W A. Microinstability Studies for the Large Helical Device. United States: N. p., 2002. Web. doi:10.2172/795722.
Rewoldt, G, Ku, L -P, Tang, W M, Sugama, H, Nakajima, N, Watanabe, K Y, Murakami, S, Yamada, H, & Cooper, W A. Microinstability Studies for the Large Helical Device. United States. doi:10.2172/795722.
Rewoldt, G, Ku, L -P, Tang, W M, Sugama, H, Nakajima, N, Watanabe, K Y, Murakami, S, Yamada, H, and Cooper, W A. Mon . "Microinstability Studies for the Large Helical Device". United States. doi:10.2172/795722. https://www.osti.gov/servlets/purl/795722.
@article{osti_795722,
title = {Microinstability Studies for the Large Helical Device},
author = {Rewoldt, G and Ku, L -P and Tang, W M and Sugama, H and Nakajima, N and Watanabe, K Y and Murakami, S and Yamada, H and Cooper, W A},
abstractNote = {Fully kinetic assessments of the stability properties of toroidal drift modes have been obtained for cases for the Large Helical Device (LHD). This calculation employs the comprehensive linear microinstability code FULL, as recently extended for nonaxisymmetric systems. The code retains the important effects in the linearized gyrokinetic equation, using the lowest-order ''ballooning representation'' for high toroidal mode number instabilities in the electrostatic limit. These effects include trapped particles, FLR, transit and bounce and magnetic drift frequency resonances, etc., for any number of plasma species. Results for toroidal drift waves destabilized by trapped electrons and ion temperature gradients are presented, using numerically-calculated three-dimensional MHD equilibria. These are reconstructed from experimental measurements. Quasilinear fluxes of particles and energy for each species are also calculated. Pairs of LHD discharges with different magnetic axis positions and with and without pellet injection are compared.},
doi = {10.2172/795722},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}