Neoclassical tearing modes in DIII-D and calculations of the stabilizing effects of localized electron cyclotron current drive

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Neoclassical tearing modes are found to limit the achievable beta in many high performance discharges in DIII-D. Electron cyclotron current drive within the magnetic islands formed as the tearing mode grows has been proposed as a means of stabilizing these modes or reducing their amplitude, thereby increasing the beta limit by a factor around 1.5. Some experimental success has been obtained previously on Asdex-U. Here the authors examine the parameter range in DIII-C in which this effect can best be studied.

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5 p.

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Prater, R.; La Haye, R.J.; Lin-Liu, Y.R.; Lohr, J.; Bernabei, S.; Perkins, F.W. et al. May 1, 1999.

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Description

Neoclassical tearing modes are found to limit the achievable beta in many high performance discharges in DIII-D. Electron cyclotron current drive within the magnetic islands formed as the tearing mode grows has been proposed as a means of stabilizing these modes or reducing their amplitude, thereby increasing the beta limit by a factor around 1.5. Some experimental success has been obtained previously on Asdex-U. Here the authors examine the parameter range in DIII-C in which this effect can best be studied.

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5 p.

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INIS; OSTI as DE99003186

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  • 13. topical conference on applications of radio frequency power to plasmas, Annapolis, MD (United States), 12-14 Apr 1999

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  • Other: DE99003186
  • Report No.: GA--A23098
  • Report No.: CONF-990411--
  • Grant Number: AC03-99ER54463;AC02-76CH03073
  • Office of Scientific & Technical Information Report Number: 354990
  • Archival Resource Key: ark:/67531/metadc678135

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  • May 1, 1999

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  • July 25, 2015, 2:20 a.m.

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  • Aug. 1, 2016, 6:38 p.m.

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Prater, R.; La Haye, R.J.; Lin-Liu, Y.R.; Lohr, J.; Bernabei, S.; Perkins, F.W. et al. Neoclassical tearing modes in DIII-D and calculations of the stabilizing effects of localized electron cyclotron current drive, article, May 1, 1999; San Diego, California. (digital.library.unt.edu/ark:/67531/metadc678135/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.