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Title: Effects of finite poloidal gyroradius, shaping, and collisions on the zonal flow residual

Abstract

Zonal flow helps reduce and regulate the turbulent transport level in tokamaks. Rosenbluth and Hinton have shown that zonal flow damps to a nonvanishing residual level in collisionless [M. Rosenbluth and F. Hinton, Phys. Rev. Lett. 80, 724 (1998)] and collisional [F. Hinton and M. Rosenbluth, Plasma Phys. Control. Fusion 41, A653 (1999)] banana regime plasmas. Recent zonal flow advances are summarized including the evaluation of the effects on the zonal flow residual by plasma cross-section shaping, shorter wavelengths including those less than an electron gyroradius, and arbitrary ion collisionality relative to the zonal low frequency. In addition to giving a brief summary of these new developments, the analytic results are compared with GS2 numerical simulations [M. Kotschenreuther, G. Rewoldt, and W. Tang, Comput. Phys. Commun. 88, 128 (1991)] to demonstrate their value as benchmarks for turbulence codes.

Authors:
; ;  [1];  [2]
  1. Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
20975038
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 14; Journal Issue: 5; Other Information: DOI: 10.1063/1.2718519; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BANANA REGIME; BENCHMARKS; COLLISIONS; CONTROL; ELECTRONS; IONS; PLASMA; PLASMA CONFINEMENT; SIMULATION; TOKAMAK DEVICES; TURBULENCE; WAVELENGTHS

Citation Formats

Xiao Yong, Catto, Peter J., Dorland, William, and Department of Physics, University of Maryland, College Park, Maryland 20742. Effects of finite poloidal gyroradius, shaping, and collisions on the zonal flow residual. United States: N. p., 2007. Web. doi:10.1063/1.2718519.
Xiao Yong, Catto, Peter J., Dorland, William, & Department of Physics, University of Maryland, College Park, Maryland 20742. Effects of finite poloidal gyroradius, shaping, and collisions on the zonal flow residual. United States. doi:10.1063/1.2718519.
Xiao Yong, Catto, Peter J., Dorland, William, and Department of Physics, University of Maryland, College Park, Maryland 20742. Tue . "Effects of finite poloidal gyroradius, shaping, and collisions on the zonal flow residual". United States. doi:10.1063/1.2718519.
@article{osti_20975038,
title = {Effects of finite poloidal gyroradius, shaping, and collisions on the zonal flow residual},
author = {Xiao Yong and Catto, Peter J. and Dorland, William and Department of Physics, University of Maryland, College Park, Maryland 20742},
abstractNote = {Zonal flow helps reduce and regulate the turbulent transport level in tokamaks. Rosenbluth and Hinton have shown that zonal flow damps to a nonvanishing residual level in collisionless [M. Rosenbluth and F. Hinton, Phys. Rev. Lett. 80, 724 (1998)] and collisional [F. Hinton and M. Rosenbluth, Plasma Phys. Control. Fusion 41, A653 (1999)] banana regime plasmas. Recent zonal flow advances are summarized including the evaluation of the effects on the zonal flow residual by plasma cross-section shaping, shorter wavelengths including those less than an electron gyroradius, and arbitrary ion collisionality relative to the zonal low frequency. In addition to giving a brief summary of these new developments, the analytic results are compared with GS2 numerical simulations [M. Kotschenreuther, G. Rewoldt, and W. Tang, Comput. Phys. Commun. 88, 128 (1991)] to demonstrate their value as benchmarks for turbulence codes.},
doi = {10.1063/1.2718519},
journal = {Physics of Plasmas},
number = 5,
volume = 14,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}