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Title: Analysis of toroidal phasing of resonant magnetic perturbation effects on edge transport in the DIII-D tokamak

Abstract

Resonant Magnetic Perturbation (RMP) fields produced by external control coils are considered a viable option for the suppression of Edge Localized Modes in present and future tokamaks. In DIII-D, the RMPs are generated by six pairs of I-coils, each spanning 60° in toroidal angle, with the currents flowing in opposite directions in adjacent pairs of I-coils. Reversal of the currents in all I-coils, which produces a 60° toroidal shift in the RMP field configuration, generates uniquely different edge pedestal profiles of the density, temperature, and rotation velocities, implying different effects on the related edge transport phenomena caused by the difference in toroidal phase of the I-coil currents. The diffusive and non-diffusive transport effects of this RMP toroidal phase reversal are analyzed by comparing the ion and electron heat diffusivities, angular momentum transport frequencies, ion diffusion coefficients, and the particle pinch velocities interpreted from the measured profiles for the two phases of the I-coil currents.

Authors:
;  [1];  [2]
  1. Georgia Institute of Technology, Atlanta, Georgia 30332 (United States)
  2. General Atomics, San Diego, California 92186 (United States)
Publication Date:
OSTI Identifier:
22218614
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 20; Journal Issue: 5; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANGULAR MOMENTUM; BOUNDARY LAYERS; CHARGED-PARTICLE TRANSPORT; COMPARATIVE EVALUATIONS; DIFFUSION; DISTURBANCES; DOUBLET-3 DEVICE; EDGE LOCALIZED MODES; ELECTRONS; PINCH EFFECT; PLASMA; PLASMA CONFINEMENT; PLASMA DENSITY; THERMAL DIFFUSIVITY; VELOCITY

Citation Formats

Wilks, T. M., Stacey, W. M., and Evans, T. E. Analysis of toroidal phasing of resonant magnetic perturbation effects on edge transport in the DIII-D tokamak. United States: N. p., 2013. Web. doi:10.1063/1.4804350.
Wilks, T. M., Stacey, W. M., & Evans, T. E. Analysis of toroidal phasing of resonant magnetic perturbation effects on edge transport in the DIII-D tokamak. United States. https://doi.org/10.1063/1.4804350
Wilks, T. M., Stacey, W. M., and Evans, T. E. 2013. "Analysis of toroidal phasing of resonant magnetic perturbation effects on edge transport in the DIII-D tokamak". United States. https://doi.org/10.1063/1.4804350.
@article{osti_22218614,
title = {Analysis of toroidal phasing of resonant magnetic perturbation effects on edge transport in the DIII-D tokamak},
author = {Wilks, T. M. and Stacey, W. M. and Evans, T. E.},
abstractNote = {Resonant Magnetic Perturbation (RMP) fields produced by external control coils are considered a viable option for the suppression of Edge Localized Modes in present and future tokamaks. In DIII-D, the RMPs are generated by six pairs of I-coils, each spanning 60° in toroidal angle, with the currents flowing in opposite directions in adjacent pairs of I-coils. Reversal of the currents in all I-coils, which produces a 60° toroidal shift in the RMP field configuration, generates uniquely different edge pedestal profiles of the density, temperature, and rotation velocities, implying different effects on the related edge transport phenomena caused by the difference in toroidal phase of the I-coil currents. The diffusive and non-diffusive transport effects of this RMP toroidal phase reversal are analyzed by comparing the ion and electron heat diffusivities, angular momentum transport frequencies, ion diffusion coefficients, and the particle pinch velocities interpreted from the measured profiles for the two phases of the I-coil currents.},
doi = {10.1063/1.4804350},
url = {https://www.osti.gov/biblio/22218614}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 20,
place = {United States},
year = {Wed May 15 00:00:00 EDT 2013},
month = {Wed May 15 00:00:00 EDT 2013}
}