Neoclassical transport in toroidal plasmas with nonaxisymmetric flux surfaces

Belli, Emily A.; Candy, Jefferey M.

doi:10.1088/0741-3335/57/5/054012

Neoclassical transport in toroidal plasmas with nonaxisymmetric flux surfaces

Journal Article · Wed Apr 15 00:00:00 EDT 2015 · Plasma Physics and Controlled Fusion

DOI:https://doi.org/10.1088/0741-3335/57/5/054012· OSTI ID:1356343

Belli, Emily A. ^[1]; Candy, Jefferey M. ^[2]

General Atomics, San Diego, CA (United States); General Atomics
General Atomics, San Diego, CA (United States)

The capability to treat nonaxisymmetric flux surface geometry has been added to the drift-kinetic code NEO. Geometric quantities (i.e. metric elements) are supplied by a recently-developed local 3D equilibrium solver, allowing neoclassical transport coefficients to be systematically computed while varying the 3D plasma shape in a simple and intuitive manner. Code verification is accomplished via detailed comparison with 3D Pfirsch–Schlüter theory. A discussion of the various collisionality regimes associated with 3D transport is given, with an emphasis on non-ambipolar particle flux, neoclassical toroidal viscosity, energy flux and bootstrap current. As a result, we compute the transport in the presence of ripple-type perturbations in a DIII-D-like H-mode edge plasma.

View Accepted Manuscript (DOE)

Research Organization:: General Atomics, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: FG02-95ER54309

OSTI ID:: 1356343

Alternate ID(s):: OSTI ID: 22539715

Journal Information:: Plasma Physics and Controlled Fusion, Journal Name: Plasma Physics and Controlled Fusion Journal Issue: 5 Vol. 57; ISSN 0741-3335

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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An adjoint method for neoclassical stellarator optimization Paul, Elizabeth; Abel, Ian; Landreman, Matt arXiv https://doi.org/10.48550/arxiv.1904.06430	text	January 2019

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
drift-kinetic
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nonaxisymmetric
toroidal plasmas

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