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Title: Current drive due to localized electron cyclotron power deposition in DIII-D

Abstract

Due to spatial localization of electron cyclotron wave injection in DIII-D, electrons heated in an off-axis region must toroidally transit the tokamak 25-50 times before re-entering the heating region. This distance is of the order of the mean free path. The effect of such RF localization is simulated with a time-dependent Fokker-Planck code which is 2D-in-velocity, 1D-in-space-along-B, and periodic in space. An effective parallel electric field arises to maintain continuity of the driven current. Somewhat suprisingly, the localized current drive efficiency remains equal to that for a uniform medium. (c) 1999 American Institute of Physics.

Authors:
 [1];  [2];  [3];  [4];  [2];  [2]
  1. CompX, 12839 Via Grimaldi, Del Mar, California 92014 (United States)
  2. General Atomics, P.O. Box 85608, San Diego, California 92186-5698 (United States)
  3. CRPP, Ecole Polytechnique Federale de Lausanne, 1007 Lausanne, (Switzerland)
  4. Moscow State University, 119899 Moscow, Leninsky Gory, Russia (Russian Federation)
Publication Date:
OSTI Identifier:
20216694
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 485; Journal Issue: 1; Other Information: PBD: 20 Sep 1999; Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ECR HEATING; TOKAMAK TYPE REACTORS; BOLTZMANN STATISTICS; ELECTRIC FIELDS; PLASMA SIMULATION; THEORETICAL DATA

Citation Formats

Harvey, R. W., Lin-Liu, Y. R., Sauter, O., Smirnov, A. P., Luce, T. C., and Prater, R. Current drive due to localized electron cyclotron power deposition in DIII-D. United States: N. p., 1999. Web. doi:10.1063/1.59745.
Harvey, R. W., Lin-Liu, Y. R., Sauter, O., Smirnov, A. P., Luce, T. C., & Prater, R. Current drive due to localized electron cyclotron power deposition in DIII-D. United States. doi:10.1063/1.59745.
Harvey, R. W., Lin-Liu, Y. R., Sauter, O., Smirnov, A. P., Luce, T. C., and Prater, R. Mon . "Current drive due to localized electron cyclotron power deposition in DIII-D". United States. doi:10.1063/1.59745.
@article{osti_20216694,
title = {Current drive due to localized electron cyclotron power deposition in DIII-D},
author = {Harvey, R. W. and Lin-Liu, Y. R. and Sauter, O. and Smirnov, A. P. and Luce, T. C. and Prater, R.},
abstractNote = {Due to spatial localization of electron cyclotron wave injection in DIII-D, electrons heated in an off-axis region must toroidally transit the tokamak 25-50 times before re-entering the heating region. This distance is of the order of the mean free path. The effect of such RF localization is simulated with a time-dependent Fokker-Planck code which is 2D-in-velocity, 1D-in-space-along-B, and periodic in space. An effective parallel electric field arises to maintain continuity of the driven current. Somewhat suprisingly, the localized current drive efficiency remains equal to that for a uniform medium. (c) 1999 American Institute of Physics.},
doi = {10.1063/1.59745},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 485,
place = {United States},
year = {1999},
month = {9}
}