A collisional drift wave description of plasma edge turbulence
作者:
Masahiro Wakatani,
Akira Hasegawa,
期刊:
Physics of Fluids(00319171)
(AIP Available online 1984)
卷期:
Volume 27,
issue 3
页码: 611-618
ISSN:0031-9171
年代: 1984
DOI:10.1063/1.864660
出版商: AIP
数据来源: AIP
摘要:
Model mode‐coupling equations for the resistive drift wave instability are numerically solved for realistic parameters found in tokamak edge plasmas. The Bohm diffusion is found to result if the parallel wavenumber is chosen to maximize the growth rate for a given value of the perpendicular wavenumber. The saturated turbulence energy has a broad frequency spectrum with a large fluctuation level proportional to &kgr;¯ (=&rgr;s/Ln, the normalized inverse scale length of the density gradient) and a wavenumber spectrum of the two‐dimensional Kolmogorov–Kraichnan type, ∼k−3.
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