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Title: ELM Destabilization by Externally Applied Non-Axisymmetric Magnetic Perturbations in NSTX

Abstract

We report on a recent set of experiments performed in NSTX to explore the effects of non-axisymmetric magnetic perturbations on the stability of edge-localized modes (ELMs). The application of these 3D fields in NSTX was found to have a strong effect on ELM stability, including the destabilization of ELMs in H-modes otherwise free of large ELMs. Exploiting the effect of the perturbations, ELMs have been controllably introduced into lithium-enhanced ELM-free H-modes, causing a reduction in impurity accumulation while maintaining high confinement. Although these experiments show the principle of the combined use of lithium coatings and 3D fields, further optimization is required in order to reduce the size of the induced ELMs.

Authors:
 [1];  [1];  [2];  [3];  [3];  [3];  [3];  [3];  [3];  [4];  [1];  [3];  [4];  [5];  [1]
  1. ORNL
  2. General Atomics, San Diego
  3. Princeton Plasma Physics Laboratory (PPPL)
  4. General Atomics
  5. Columbia University
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1038505
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: 4th Workshop on Stochasticity in Fusion Plasmas, Julich, Germany, 20090302, 20090304
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 36 MATERIALS SCIENCE; COATINGS; CONFINEMENT; LITHIUM; OPTIMIZATION; STABILITY

Citation Formats

Canik, John, Maingi, Rajesh, Evans, T.E., Bell, R. E., Gerhardt, S. P., Kugel, H. W., LeBlanc, B. P., Manickam, J., Menard, J. E., Osborne, T. H., Park, Jin Myung, Paul, S., Snyder, P. B., Sabbagh, S. A., and Unterberg, Ezekial A. ELM Destabilization by Externally Applied Non-Axisymmetric Magnetic Perturbations in NSTX. United States: N. p., 2010. Web.
Canik, John, Maingi, Rajesh, Evans, T.E., Bell, R. E., Gerhardt, S. P., Kugel, H. W., LeBlanc, B. P., Manickam, J., Menard, J. E., Osborne, T. H., Park, Jin Myung, Paul, S., Snyder, P. B., Sabbagh, S. A., & Unterberg, Ezekial A. ELM Destabilization by Externally Applied Non-Axisymmetric Magnetic Perturbations in NSTX. United States.
Canik, John, Maingi, Rajesh, Evans, T.E., Bell, R. E., Gerhardt, S. P., Kugel, H. W., LeBlanc, B. P., Manickam, J., Menard, J. E., Osborne, T. H., Park, Jin Myung, Paul, S., Snyder, P. B., Sabbagh, S. A., and Unterberg, Ezekial A. 2010. "ELM Destabilization by Externally Applied Non-Axisymmetric Magnetic Perturbations in NSTX". United States. doi:.
@article{osti_1038505,
title = {ELM Destabilization by Externally Applied Non-Axisymmetric Magnetic Perturbations in NSTX},
author = {Canik, John and Maingi, Rajesh and Evans, T.E. and Bell, R. E. and Gerhardt, S. P. and Kugel, H. W. and LeBlanc, B. P. and Manickam, J. and Menard, J. E. and Osborne, T. H. and Park, Jin Myung and Paul, S. and Snyder, P. B. and Sabbagh, S. A. and Unterberg, Ezekial A},
abstractNote = {We report on a recent set of experiments performed in NSTX to explore the effects of non-axisymmetric magnetic perturbations on the stability of edge-localized modes (ELMs). The application of these 3D fields in NSTX was found to have a strong effect on ELM stability, including the destabilization of ELMs in H-modes otherwise free of large ELMs. Exploiting the effect of the perturbations, ELMs have been controllably introduced into lithium-enhanced ELM-free H-modes, causing a reduction in impurity accumulation while maintaining high confinement. Although these experiments show the principle of the combined use of lithium coatings and 3D fields, further optimization is required in order to reduce the size of the induced ELMs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2010,
month = 1
}

Conference:
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