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Title: Quasilinear diffusion coefficients in a finite Larmor radius expansion for ion cyclotron heated plasmas

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.4982060· OSTI ID:1353216
 [1];  [1];  [2];  [3];  [2];  [4];  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  3. XCEL Engineering, Oak Ridge, TN (United States)
  4. CompX, Del Mar, CA (United States)
+ Show Author Affiliations

In this study, a reduced model of quasilinear velocity diffusion by a small Larmor radius approximation is derived to couple the Maxwell’s equations and the Fokker Planck equation self-consistently for the ion cyclotron range of frequency waves in a tokamak. The reduced model ensures the important properties of the full model by Kennel-Engelmann diffusion, such as diffusion directions, wave polarizations, and H-theorem. The kinetic energy change (Wdot ) is used to derive the reduced model diffusion coefficients for the fundamental damping (n = 1) and the second harmonic damping (n = 2) to the lowest order of the finite Larmor radius expansion. The quasilinear diffusion coefficients are implemented in a coupled code (TORIC-CQL3D) with the equivalent reduced model of the dielectric tensor. We also present the simulations of the ITER minority heating scenario, in which the reduced model is verified within the allowable errors from the full model results.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Grant/Contract Number:
FC02-01ER54648; AC02-05CH11231; AC02-CH0911466
OSTI ID:
1353216
Alternate ID(s):
OSTI ID: 1361850
Journal Information:
Physics of Plasmas, Vol. 24, Issue 5; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

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Integrated Tokamak modeling: When physics informs engineering and research planning journal May 2018
Similarity of the coupled equations for RF waves in a tokamak journal January 2019

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Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
RF heating
tokamak
kinetic theory
cyclotron damping