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Title: Experiments on ion cyclotron damping at the deuterium fourth harmonic in DIII-D

Abstract

Absorption of fast Alfven waves by the energetic ions of an injected beam is evaluated in the DIII-D tokamak. Ion cyclotron resonance absorption at the fourth harmonic of the deuteron cyclotron frequency is observed with deuterium neutral beam injection (f=60 MHz, B{sub T}=1.9 T). Enhanced D-D neutron rates are evidence of absorption at the Doppler-shifted cyclotron resonance. Characteristics of global energy confinement provide further proof of substantial beam acceleration by the rf. In many cases, the accelerated deuterons cause temporary stabilization of the sawtooth (''monster sawteeth''), at relatively low rf power levels of {approx}1 MW. (c) 1999 American Institute of Physics.

Authors:
 [1];  [2];  [3];  [3];  [4];  [5];  [1];  [6]
  1. General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States)
  2. Oak Ridge National Laboratory, Oak Ridge, Tennessee (United States)
  3. Princeton Plasma Physics Laboratory, Princeton, New Jersey (United States)
  4. University of California, Irvine, California (United States)
  5. University of California, San Diego, California (United States)
  6. Massachusetts Institute of Technology, Cambridge, Massachusetts (United States)
Publication Date:
OSTI Identifier:
20216687
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; ICR HEATING; ALFVEN WAVES; SAWTOOTH OSCILLATIONS; TOKAMAK TYPE REACTORS; POWER RANGE 01-10 MW

Citation Formats

Pinsker, R. I., Baity, F. W., Bernabei, S., Greenough, N., Heidbrink, W. W., Mau, T. K., Petty, C. C., and Porkolab, M. Experiments on ion cyclotron damping at the deuterium fourth harmonic in DIII-D. United States: N. p., 1999. Web. doi:10.1063/1.59723.
Pinsker, R. I., Baity, F. W., Bernabei, S., Greenough, N., Heidbrink, W. W., Mau, T. K., Petty, C. C., & Porkolab, M. Experiments on ion cyclotron damping at the deuterium fourth harmonic in DIII-D. United States. doi:10.1063/1.59723.
Pinsker, R. I., Baity, F. W., Bernabei, S., Greenough, N., Heidbrink, W. W., Mau, T. K., Petty, C. C., and Porkolab, M. Mon . "Experiments on ion cyclotron damping at the deuterium fourth harmonic in DIII-D". United States. doi:10.1063/1.59723.
@article{osti_20216687,
title = {Experiments on ion cyclotron damping at the deuterium fourth harmonic in DIII-D},
author = {Pinsker, R. I. and Baity, F. W. and Bernabei, S. and Greenough, N. and Heidbrink, W. W. and Mau, T. K. and Petty, C. C. and Porkolab, M.},
abstractNote = {Absorption of fast Alfven waves by the energetic ions of an injected beam is evaluated in the DIII-D tokamak. Ion cyclotron resonance absorption at the fourth harmonic of the deuteron cyclotron frequency is observed with deuterium neutral beam injection (f=60 MHz, B{sub T}=1.9 T). Enhanced D-D neutron rates are evidence of absorption at the Doppler-shifted cyclotron resonance. Characteristics of global energy confinement provide further proof of substantial beam acceleration by the rf. In many cases, the accelerated deuterons cause temporary stabilization of the sawtooth (''monster sawteeth''), at relatively low rf power levels of {approx}1 MW. (c) 1999 American Institute of Physics.},
doi = {10.1063/1.59723},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 485,
place = {United States},
year = {1999},
month = {9}
}