Plasma rotation and rf heating in DIII-D

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In a variety of discharge conditions on DIII-D it is observed that rf electron heating reduces the toroidal rotation speed and core ion temperature. The rf heating can be with either fast wave or electron cyclotron heating and this effect is insensitive to the details of the launched toroidal wavenumber spectrum. To date all target discharges have rotation first established with co-directed neutral beam injection. A possible cause is enhanced ion momentum and thermal diffusivity due to electron heating effectively creating greater anomalous viscosity. Another is that a counter directed toroidal force is applied to the bulk plasma via rf ... continued below

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5 p.

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deGrassie, J.S.; Baker, D.R. & Burrell, K.H. May 1, 1999.

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Description

In a variety of discharge conditions on DIII-D it is observed that rf electron heating reduces the toroidal rotation speed and core ion temperature. The rf heating can be with either fast wave or electron cyclotron heating and this effect is insensitive to the details of the launched toroidal wavenumber spectrum. To date all target discharges have rotation first established with co-directed neutral beam injection. A possible cause is enhanced ion momentum and thermal diffusivity due to electron heating effectively creating greater anomalous viscosity. Another is that a counter directed toroidal force is applied to the bulk plasma via rf driven radial current.

Physical Description

5 p.

Notes

INIS; OSTI as DE99003184

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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: DE99003184
  • Report No.: GA--A23080
  • Report No.: CONF-990411--
  • Grant Number: AC03-99ER54463;W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 354991
  • Archival Resource Key: ark:/67531/metadc683366

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  • May 1, 1999

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Aug. 1, 2016, 6:38 p.m.

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deGrassie, J.S.; Baker, D.R. & Burrell, K.H. Plasma rotation and rf heating in DIII-D, article, May 1, 1999; San Diego, California. (digital.library.unt.edu/ark:/67531/metadc683366/: accessed June 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.