Modification of the Current Profile in DIII-D by Off-Axis Electron Cyclotron Current Drive

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Description

Localized non-inductive currents due to electron cyclotron wave absorption have been measured on the DIII-D tokamak. Clear evidence of the non-inductive currents is seen on the internal magnetic field measurements by motional Stark effect spectroscopy. The magnitude and location of the non-inductive current is evaluated by comparing the total and Ohmic current profiles of discharges with and without electron cyclotron wave power. The measured current agrees with Fokker-Planck calculations near the magnetic axis, but exceeds the predicted value as the location of the current drive is moved to the half radius.

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10 p.

Creation Information

Luce, T.C.; Lin-Liu, Y.R.; Harvey, R.W.; Giruzzi, G.; Lohr, J.M.; Petty, C.C. et al. July 1, 1999.

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  • General Atomic Company
    Publisher Info: General Atomics, San Diego, CA (United States)
    Place of Publication: San Diego, California

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Description

Localized non-inductive currents due to electron cyclotron wave absorption have been measured on the DIII-D tokamak. Clear evidence of the non-inductive currents is seen on the internal magnetic field measurements by motional Stark effect spectroscopy. The magnitude and location of the non-inductive current is evaluated by comparing the total and Ohmic current profiles of discharges with and without electron cyclotron wave power. The measured current agrees with Fokker-Planck calculations near the magnetic axis, but exceeds the predicted value as the location of the current drive is moved to the half radius.

Physical Description

10 p.

Notes

INIS; OSTI as DE00767040

Medium: P; Size: 10 pages

Source

  • 26th European Conference on Controlled Fusion and Plasma Physics, Maastricht (NL), 06/14/1999--06/18/1999

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  • Report No.: GA-A23167
  • Grant Number: AC03-99ER54463
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 767040
  • Archival Resource Key: ark:/67531/metadc722747

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • July 1, 1999

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • April 6, 2017, 7 p.m.

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Luce, T.C.; Lin-Liu, Y.R.; Harvey, R.W.; Giruzzi, G.; Lohr, J.M.; Petty, C.C. et al. Modification of the Current Profile in DIII-D by Off-Axis Electron Cyclotron Current Drive, article, July 1, 1999; San Diego, California. (digital.library.unt.edu/ark:/67531/metadc722747/: accessed April 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.