TRANSPORT STUDIES IN DIII-D WITH MODULATED ECH

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Experiments have been performed where the T{sub e} profile stiffness was tested at several spatial locations by varying the ECH resonance location. Propagation of the pulses was Fourier analyzed and compared to simulations based on several transport models. The plasma appears to be near the critical T{sub e} gradient for ETG modes and marginally stable to ITG modes. However, the local T{sub e} response to a locally applied heat pulse does not indicate a nonlinear, critical gradient model where T{sub e} is clipped when trying to rise above a critical gradient. The response can be simply understood as the plasma ... continued below

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DeBOO, J.C.; AUSTIN, M.E.; BRAVENEC, R.V.; KINSEY, J.E; LOHR, J.; LUCE, T.C. et al. July 1, 2002.

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Experiments have been performed where the T{sub e} profile stiffness was tested at several spatial locations by varying the ECH resonance location. Propagation of the pulses was Fourier analyzed and compared to simulations based on several transport models. The plasma appears to be near the critical T{sub e} gradient for ETG modes and marginally stable to ITG modes. However, the local T{sub e} response to a locally applied heat pulse does not indicate a nonlinear, critical gradient model where T{sub e} is clipped when trying to rise above a critical gradient. The response can be simply understood as the plasma integrating the ECH power, producing an increase in T{sub e} which equilibrates to a new local level with an exponential time constant representing the local confinement time.

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Medium: X; Size: 7 pages

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Oakland Operations Office, Oakland, CA (US); INIS

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  • 29th European Physical Society Conference on Plasma Physics and Controlled Fusion, Montreux (CH), 06/17/2002--06/21/2002; Other Information: THIS IS A PREPRINT OF A PAPER PRESENTED AT THE 29TH EUROPEAN PHYSICAL SOCIETY CONFERENCE ON PLASMA PHYSICS AND CONTROLLED FUSION, JUNE 17-21, 2002 IN MONTREUX, SWITZERLAND, AND TO BE PUBLISHED IN THE ''PROCEEDINGS''

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  • Report No.: NONE
  • Grant Number: AC03-99ER54463
  • Office of Scientific & Technical Information Report Number: 804668
  • Archival Resource Key: ark:/67531/metadc735959

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  • July 1, 2002

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  • Oct. 18, 2015, 6:40 p.m.

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  • Jan. 4, 2017, 1:56 p.m.

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DeBOO, J.C.; AUSTIN, M.E.; BRAVENEC, R.V.; KINSEY, J.E; LOHR, J.; LUCE, T.C. et al. TRANSPORT STUDIES IN DIII-D WITH MODULATED ECH, article, July 1, 2002; United States. (digital.library.unt.edu/ark:/67531/metadc735959/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.