Perspectives gained from ICRF physics studies on TFTR

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The physics of ICRF heating and current drive has been studied on TFTR for over a decade. Following the early low power coupling studies, high power experiments resulted in sawtooth stabilization, the first observation of RF-driven excitation of toroidal Alfven eigenmodes, and the discovery of a mode conversion scenario for localized off-axis electron heating. The program culminated with the first studies of high power ICRF heating and profile control in tritium-rich high performance plasmas. A significant part of the concluding experiments centered on the potential of ICRF to drive sheared flows in order to suppress turbulence in the plasma core. ... continued below

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4 p.

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Phillips, C.K.; Bell, M. & Batha, S. July 1, 1998.

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The physics of ICRF heating and current drive has been studied on TFTR for over a decade. Following the early low power coupling studies, high power experiments resulted in sawtooth stabilization, the first observation of RF-driven excitation of toroidal Alfven eigenmodes, and the discovery of a mode conversion scenario for localized off-axis electron heating. The program culminated with the first studies of high power ICRF heating and profile control in tritium-rich high performance plasmas. A significant part of the concluding experiments centered on the potential of ICRF to drive sheared flows in order to suppress turbulence in the plasma core. Initial measurements taken with a novel poloidal velocity diagnostic suggest that localized sheared poloidal flows can be driven with ion Bernstein waves excited directly or else via mode conversion from a propagating fast magnetosonic wave. In this paper, recent results from TFTR on wave-based profile control techniques will be summarized along with suggestions for future studies elsewhere.

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4 p.

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INIS; OSTI as DE98057589

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  • 2. Europhysics topical conference on RF heating and current drive of fusion devices, Brussels (Belgium), 20-23 Jan 1998

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  • Other: DE98057589
  • Report No.: PPPL-CFP--3870
  • Report No.: CONF-980130--
  • Grant Number: AC02-76CH03073
  • Office of Scientific & Technical Information Report Number: 656836
  • Archival Resource Key: ark:/67531/metadc709067

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  • July 1, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 15, 2016, 10:06 p.m.

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Phillips, C.K.; Bell, M. & Batha, S. Perspectives gained from ICRF physics studies on TFTR, article, July 1, 1998; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc709067/: accessed September 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.