Author:
Hirose A,Liu D Z,Livingstone S,Hirose A
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 [Formula: see text] 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 [Formula: see text] qνTe (c/ωpe)2 [Formula: see text] / Ln where c/ωpe is the electron skin depth. PACS Nos.: 52.65.Tt, 52.55.Fa, 52.35.Py
Publisher
Canadian Science Publishing
Subject
General Physics and Astronomy