Simulation of neoclassical transport with the continuum gyrokinetic code COGENT

Dorf, M. A.; Cohen, R. H.; Dorr, M.; Rognlien, T.; Hittinger, J.; Compton, J.; Colella, P.; Martin, D.; McCorquodale, P.

doi:10.1063/1.4776712

Title: Simulation of neoclassical transport with the continuum gyrokinetic code COGENT

Journal Article · Tue Jan 15 00:00:00 EST 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4776712· OSTI ID:22113359

Dorf, M. A.; Cohen, R. H.; Dorr, M.; Rognlien, T.; Hittinger, J.; Compton, J. ^[1]; Colella, P.; Martin, D.; McCorquodale, P. ^[2]

Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

The development of the continuum gyrokinetic code COGENT for edge plasma simulations is reported. The present version of the code models a nonlinear axisymmetric 4D (R, v{sub Parallel-To }, {mu}) gyrokinetic equation coupled to the long-wavelength limit of the gyro-Poisson equation. Here, R is the particle gyrocenter coordinate in the poloidal plane, and v{sub Parallel-To} and {mu} are the guiding center velocity parallel to the magnetic field and the magnetic moment, respectively. The COGENT code utilizes a fourth-order finite-volume (conservative) discretization combined with arbitrary mapped multiblock grid technology (nearly field-aligned on blocks) to handle the complexity of tokamak divertor geometry with high accuracy. Topics presented are the implementation of increasingly detailed model collision operators, and the results of neoclassical transport simulations including the effects of a strong radial electric field characteristic of a tokamak pedestal under H-mode conditions.

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OSTI ID:: 22113359

Journal Information:: Physics of Plasmas, Vol. 20, Issue 1; Other Information: (c) 2013 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X

Country of Publication:: United States

Language:: English

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Kinetic neoclassical transport in the H-mode pedestal Battaglia, D. J.; Burrell, K. H.; Chang, C. S. Physics of Plasmas, Vol. 21, Issue 7 https://doi.org/10.1063/1.4886803	journal	July 2014
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Full- f version of GENE for turbulence in open-field-line systems Pan, Q.; Told, D.; Shi, E. L. Physics of Plasmas, Vol. 25, Issue 6 https://doi.org/10.1063/1.5008895	journal	June 2018
Gyrokinetic simulations of m = 0 mode in sheared flow Z-pinch plasmas Geyko, V. I.; Dorf, M.; Angus, J. R. Physics of Plasmas, Vol. 26, Issue 6 https://doi.org/10.1063/1.5100542	journal	June 2019
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