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Three-dimensional reduced drift kinetic equation for neoclassical transport of helical plasmas in the ultralow collisionality regime
Based on the original five-dimensional drift kinetic equation, a three-dimensional reduced drift kinetic equation has been obtained to describe the neoclassical transport of helical plasmas in the ult...
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Nondissipative kinetic simulation and analytical solution of three-mode equations of the ion temperature gradient instability
A nondissipative drift kinetic simulation scheme, which rigorously satisfies the time-reversibility, is applied to the three-mode coupling problem of the ion temperature gradient (ITG) instability. It...

Comparisons and physics basis of tokamak transport models and turbulence simulations

Phys. Plasmas 7, 969 (2000); doi:10.1063/1.873896

Issue Date: March 2000

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A. M. Dimits,1 G. Bateman,2 M. A. Beer,3 B. I. Cohen,1 W. Dorland,4 G. W. Hammett,3 C. Kim,5 J. E. Kinsey,2 M. Kotschenreuther,6 A. H. Kritz,2 L. L. Lao,7 J. Mandrekas,8 W. M. Nevins,1 S. E. Parker,5 A. J. Redd,9 D. E. Shumaker,1 R. Sydora,10 and J. Weiland11
1Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550
2Lehigh University, Bethlehem, Pennsylvania 18015
3Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08540
4University of Maryland, College Park, Maryland 20742
5University of Colorado, Boulder, Colorado 80309
6Institute for Fusion Studies, Univ. of Texas, Austin, Texas 78712
7General Atomics, Inc., San Diego, California 92186-5608
8Georgia Institute of Technology, Atlanta, Georgia 30332-0225
9University of Washington, Seattle, Washington 98195
10University of Alberta, Edmonton, Alberta, AB T6G2J1 Canada
11Chalmers University of Technology, S-412 96 Goteborg, Sweden
The predictions of gyrokinetic and gyrofluid simulations of ion-temperature-gradient (ITG) instability and turbulence in tokamak plasmas as well as some tokamak plasma thermal transport models, which have been widely used for predicting the performance of the proposed International Thermonuclear Experimental Reactor (ITER) tokamak [Plasma Physics and Controlled Nuclear Fusion Research, 1996 (International Atomic Energy Agency, Vienna, 1997), Vol. 1, p. 3], are compared. These comparisons provide information on effects of differences in the physics content of the various models and on the fusion-relevant figures of merit of plasma performance predicted by the models. Many of the comparisons are undertaken for a simplified plasma model and geometry which is an idealization of the plasma conditions and geometry in a Doublet III-D [Plasma Physics and Controlled Nuclear Fusion Research, 1986 (International Atomic Energy Agency, Vienna, 1987), Vol. 1, p. 159] high confinement (H-mode) experiment. Most of the models show good agreements in their predictions and assumptions for the linear growth rates and frequencies. There are some differences associated with different equilibria. However, there are significant differences in the transport levels between the models. The causes of some of the differences are examined in some detail, with particular attention to numerical convergence in the turbulence simulations (with respect to simulation mesh size, system size and, for particle-based simulations, the particle number). The implications for predictions of fusion plasma performance are also discussed. ©2000 American Institute of Physics.
History: Received 3 September 1999; accepted 8 December 1999
Permalink: http://link.aip.org/link/?PHPAEN/7/969/1
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KEYWORDS and PACS

Keywords
PACS
  • 52.35.Ra
    Physics of plasmas and electric discharges Waves, oscillations, and instabilities in plasma Plasma turbulence
  • 52.65.Tt
    Physics of plasmas and electric discharges Plasma simulation Gyrofluid and gyrokinetic simulations
  • 52.25.Fi
    Physics of plasmas and electric discharges Plasma properties Transport properties
  • YEAR: 2000

PUBLICATION DATA

ISSN:
1070-664X (print)   1089-7674 (online)
Publisher:
AIP is a member of CrossRef AIP

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