Parametric assessments of current rampup by Lower Hybrid Current Drive in TFCX

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A lower hybrid current drive code has been developed from two previous existing codes which incorporates the eikonal (WKB) approximation in toroidal canonical variables and an analytic treatment of quasi-linear absorption. Ray-tracing is performed for a 5 to 9 ray spectrum in a nonuniform, circular plasma with the local warm plasma dispersion relation. A parameter study in n/sub e/, T/sub e/, n/sub parallel/, and frequency is being carried out for two startup scenarios (i.e., expanding radius at the outboard midplane and full radius startup on the toroidal axis) for the superconducting toroidal field coil TFCX device. Driven current profiles and ... continued below

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Pages: 21

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Freije, S.A. & Peng, Y.K.M. January 1, 1984.

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Description

A lower hybrid current drive code has been developed from two previous existing codes which incorporates the eikonal (WKB) approximation in toroidal canonical variables and an analytic treatment of quasi-linear absorption. Ray-tracing is performed for a 5 to 9 ray spectrum in a nonuniform, circular plasma with the local warm plasma dispersion relation. A parameter study in n/sub e/, T/sub e/, n/sub parallel/, and frequency is being carried out for two startup scenarios (i.e., expanding radius at the outboard midplane and full radius startup on the toroidal axis) for the superconducting toroidal field coil TFCX device. Driven current profiles and current drive efficiencies for both a Maxwellian background plasma and an electron distribution with an rf-enhanced tail are presented.

Physical Description

Pages: 21

Notes

NTIS, PC A02/MF A01; 1.

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  • Meeting of the Plasma Physics Division of the American Physical Society, Boston, MA, USA, 27 Oct 1984

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  • Other: DE85003682
  • Report No.: CONF-841010-13
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 6256617
  • Archival Resource Key: ark:/67531/metadc1112787

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • January 1, 1984

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

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  • May 15, 2018, 6 p.m.

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Freije, S.A. & Peng, Y.K.M. Parametric assessments of current rampup by Lower Hybrid Current Drive in TFCX, article, January 1, 1984; Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc1112787/: accessed March 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.