A fully-neoclassical finite-orbit-width version of the CQL3D Fokker–Planck code

Petrov, Yu V.; Harvey, R. W.

doi:10.1088/0741-3335/58/11/115001

Title: A fully-neoclassical finite-orbit-width version of the CQL3D Fokker–Planck code

Journal Article · Thu Sep 08 00:00:00 EDT 2016 · Plasma Physics and Controlled Fusion

DOI:https://doi.org/10.1088/0741-3335/58/11/115001· OSTI ID:1322416

Petrov, Yu V.; Harvey, R. W.

The time-dependent bounce-averaged CQL3D flux-conservative finite-difference Fokker–Planck equation (FPE) solver has been upgraded to include finite-orbit-width (FOW) capabilities which are necessary for an accurate description of neoclassical transport, losses to the walls, and transfer of particles, momentum, and heat to the scrape-off layer. The FOW modifications are implemented in the formulation of the neutral beam source, collision operator, RF quasilinear diffusion operator, and in synthetic particle diagnostics. The collisional neoclassical radial transport appears naturally in the FOW version due to the orbit-averaging of local collision coefficients coupled with transformation coefficients from local (R, Z) coordinates along each guiding-center orbit to the corresponding midplane computational coordinates, where the FPE is solved. In a similar way, the local quasilinear RF diffusion terms give rise to additional radial transport of orbits. We note that the neoclassical results are obtained for ‘full’ orbits, not dependent on a common small orbit-width approximation. Results of validation tests for the FOW version are also presented.

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Research Organization:: CompX, Del Mar, CA (United States)

Sponsoring Organization:: USDOE Office of Fossil Energy (FE); USDOE Office of Science (SC)

Grant/Contract Number:: FC02-01ER54649; SC0006614; FG02-04ER54744

OSTI ID:: 1322416

Alternate ID(s):: OSTI ID: 1322417; OSTI ID: 1425971

Journal Information:: Plasma Physics and Controlled Fusion, Journal Name: Plasma Physics and Controlled Fusion Vol. 58 Journal Issue: 11; ISSN 0741-3335

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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Cited by: 29 works

Citation information provided by
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Cited By (3)

Synergy effect of the Ohkawa current drive of electron cyclotron waves and the lower hybrid current drive: a new mechanism Zheng, P. W.; Gong, X. Y.; Yin, X. H. Nuclear Fusion, Vol. 59, Issue 5 https://doi.org/10.1088/1741-4326/ab110c	journal	April 2019
RABBIT: Real-time simulation of the NBI fast-ion distribution Weiland, M.; Bilato, R.; Dux, R. Nuclear Fusion, Vol. 58, Issue 8 https://doi.org/10.1088/1741-4326/aabf0f	journal	July 2018
Similarity of the coupled equations for RF waves in a tokamak Lee, Jungpyo; Smithe, David; Jaeger, Erwin F. Physics of Plasmas, Vol. 26, Issue 1 https://doi.org/10.1063/1.5066288	journal	January 2019

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