skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: RF experiments on spherical torus plasmas

Abstract

Experimental operations are about to begin on the next generation of spherical torus (ST) devices-the National Spherical Torus eXperiment (NSTX) in the U.S. and the Mega-Amp Spherical Torus (MAST) in the U.K. The application of RF heating and current drive to these high beta, compact confinement devices is a challenging problem. The initial focus for NSTX had been on the High Harmonic Fast Wave (HHFW) regime. Although modeling of HHFW heating and current drive has been performed at ORNL, UCSD, MIT, and PPPL, there are few experiments in this frequency range. In conventional tokamaks, the DIII-D experiments at the 5{sup th}-7{sup th} cyclotron harmonic are the closest approach to the HHFW regime. In an ST, the only RF heating experiments to date have been performed at the 15{sup th} harmonic on the Current Drive eXperiment-Upgrade (CDX-U) at PPPL. General features of HHFW heating and current drive and the degree to which experimental confirmation of these features is available will be discussed. (c) 1999 American Institute of Physics.

Authors:
 [1];  [1];  [2];  [2];  [2];  [3];  [2];  [1];  [1];  [4]
  1. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
  2. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
  3. Johns Hopkins University, Baltimore, Maryland 21218 (United States)
  4. University of California-San Diego, La Jolla, California 92093 (United States) (and others)
Publication Date:
OSTI Identifier:
20216698
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; HIGH-FREQUENCY HEATING; POWER RANGE 01-10 MW; ELECTRON DENSITY; ELECTRON TEMPERATURE; MAGNETIC FIELDS; ELECTRIC CURRENTS; EXPERIMENTAL DATA

Citation Formats

Majeski, R., Menard, J., Batchelor, D., Bigelow, T., Carter, M. D., Finkenthal, M., Jaeger, E. F., Jones, B., Kaita, R., and Mau, T. K. RF experiments on spherical torus plasmas. United States: N. p., 1999. Web. doi:10.1063/1.59678.
Majeski, R., Menard, J., Batchelor, D., Bigelow, T., Carter, M. D., Finkenthal, M., Jaeger, E. F., Jones, B., Kaita, R., & Mau, T. K. RF experiments on spherical torus plasmas. United States. doi:10.1063/1.59678.
Majeski, R., Menard, J., Batchelor, D., Bigelow, T., Carter, M. D., Finkenthal, M., Jaeger, E. F., Jones, B., Kaita, R., and Mau, T. K. Mon . "RF experiments on spherical torus plasmas". United States. doi:10.1063/1.59678.
@article{osti_20216698,
title = {RF experiments on spherical torus plasmas},
author = {Majeski, R. and Menard, J. and Batchelor, D. and Bigelow, T. and Carter, M. D. and Finkenthal, M. and Jaeger, E. F. and Jones, B. and Kaita, R. and Mau, T. K.},
abstractNote = {Experimental operations are about to begin on the next generation of spherical torus (ST) devices-the National Spherical Torus eXperiment (NSTX) in the U.S. and the Mega-Amp Spherical Torus (MAST) in the U.K. The application of RF heating and current drive to these high beta, compact confinement devices is a challenging problem. The initial focus for NSTX had been on the High Harmonic Fast Wave (HHFW) regime. Although modeling of HHFW heating and current drive has been performed at ORNL, UCSD, MIT, and PPPL, there are few experiments in this frequency range. In conventional tokamaks, the DIII-D experiments at the 5{sup th}-7{sup th} cyclotron harmonic are the closest approach to the HHFW regime. In an ST, the only RF heating experiments to date have been performed at the 15{sup th} harmonic on the Current Drive eXperiment-Upgrade (CDX-U) at PPPL. General features of HHFW heating and current drive and the degree to which experimental confirmation of these features is available will be discussed. (c) 1999 American Institute of Physics.},
doi = {10.1063/1.59678},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 485,
place = {United States},
year = {1999},
month = {9}
}