Toroidal microinstability studies of high temperature tokamaks

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Results from comprehensive kinetic microinstability calculations are presented showing the effects of toroidicity on the ion temperature gradient mode and its relationship to the trapped-electron mode in high-temperature tokamak plasmas. The corresponding particle and energy fluxes have also been computed. It is found that, although drift-type microinstabilities persist over a wide range of values of the ion temperature gradient parameter /eta//sub i/ /equivalent to/ (dlnT/sub i//dr)/(dlnn/sub i//dr), the characteristic features of the dominant mode are those of the /eta//sub i/-type instability when /eta//sub i/ > /eta//sub ic/ /approximately/1.2 to 1.4 and of the trapped-electron mode when /eta//sub i/ < /eta//sub ... continued below

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Pages: 19

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Rewoldt, G. & Tang, W.M. July 1, 1989.

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Description

Results from comprehensive kinetic microinstability calculations are presented showing the effects of toroidicity on the ion temperature gradient mode and its relationship to the trapped-electron mode in high-temperature tokamak plasmas. The corresponding particle and energy fluxes have also been computed. It is found that, although drift-type microinstabilities persist over a wide range of values of the ion temperature gradient parameter /eta//sub i/ /equivalent to/ (dlnT/sub i//dr)/(dlnn/sub i//dr), the characteristic features of the dominant mode are those of the /eta//sub i/-type instability when /eta//sub i/ > /eta//sub ic/ /approximately/1.2 to 1.4 and of the trapped-electron mode when /eta//sub i/ < /eta//sub ic/. 16 refs., 7 figs.

Physical Description

Pages: 19

Notes

NTIS, PC A03/MF A01 - OSTI; 1.

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  • Other Information: Portions of this document are illegible in microfiche products

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  • Other: DE89014336
  • Report No.: PPPL-2635
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/6025788 | External Link
  • Office of Scientific & Technical Information Report Number: 6025788
  • Archival Resource Key: ark:/67531/metadc1095566

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Creation Date

  • July 1, 1989

Added to The UNT Digital Library

  • Feb. 18, 2018, 3:59 p.m.

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  • May 11, 2018, 3:53 p.m.

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Rewoldt, G. & Tang, W.M. Toroidal microinstability studies of high temperature tokamaks, report, July 1, 1989; New Jersey. (digital.library.unt.edu/ark:/67531/metadc1095566/: accessed September 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.