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Title: Nonlinear growth of zonal flows by secondary instability in general magnetic geometry

Here we present a theory of the nonlinear growth of zonal flows in magnetized plasma turbulence, by the mechanism of secondary instability. The theory is derived for general magnetic geometry, and is thus applicable to both tokamaks and stellarators. The predicted growth rate is shown to compare favorably with nonlinear gyrokinetic simulations, with the error scaling as expected with the small parameter of the theory.
Authors:
 [1] ;  [2]
  1. Max-Planck-Inst. fur Plasmaphysik, Greifswald, (Germany)
  2. Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy
Publication Date:
Grant/Contract Number:
AC02-05CH11231; 277870; DEAC02-05CH11231
Type:
Published Article
Journal Name:
New Journal of Physics
Additional Journal Information:
Journal Volume: 19; Journal Issue: 2; Journal ID: ISSN 1367-2630
Publisher:
IOP Publishing
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC); European Union (EU)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; stellarators; magnetic confinement fusion; plasma turbulence; zonal flows; nonlinear stability
OSTI Identifier:
1437702
Alternate Identifier(s):
OSTI ID: 1393855