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- Title
Effects of charge non-neutrality and finite beta on the electron temperature gradient modes in Tokamaks.
- Authors
Hirose, A.; Liu, D. Z.; Livingstone, S.
- Abstract
Local kinetic analysis of the electron temperature gradient (ETG) mode in Tokamaks indicates that the effects of charge non-neutrality are significant in the parameter regime of Tokamaks. The maximum growth rate occurs at (k/kDe)2 ≍ 0.5 when the electron temperature and density are varied over a wide range. The growth rate becomes dependent on the β factor even though the ETG mode is predominantly electrostatic. Finite β stabilization of the ETG mode requires a large ballooning parameter so as to cause an effective drift reversal. Mixing length estimate yields an electron thermal diffusivity χe ≍ qνTe (c/ωpe)2 √βe / Ln where c/ωpe is the electron skin depth.PACS Nos.: 52.65.Tt, 52.55.Fa, 52.35.Py
- Subjects
TOKAMAKS; ELECTRON temperature; TEMPERATURE; ELECTRON distribution; ELECTROSTATICS; THERMAL diffusivity
- Publication
Canadian Journal of Physics, 2004, Vol 82, Issue 3, p167
- ISSN
0008-4204
- Publication type
Article
- DOI
10.1139/p04-006