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Title: Neoclassical transport in toroidal plasmas with nonaxisymmetric flux surfaces

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.
Authors:
 [1] ;  [1]
  1. General Atomics, San Diego, CA (United States)
Publication Date:
Grant/Contract Number:
FG02-95ER54309
Type:
Accepted Manuscript
Journal Name:
Plasma Physics and Controlled Fusion
Additional Journal Information:
Journal Volume: 57; Journal Issue: 5; Journal ID: ISSN 0741-3335
Publisher:
IOP Science
Research Org:
General Atomics, San Diego, CA (United States)
Sponsoring Org:
USDOE Office of Nuclear Energy (NE)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; neoclassical transport; toroidal plasmas; nonaxisymmetric; drift-kinetic
OSTI Identifier:
1356343

Belli, Emily A., and Candy, Jefferey M.. Neoclassical transport in toroidal plasmas with nonaxisymmetric flux surfaces. United States: N. p., Web. doi:10.1088/0741-3335/57/5/054012.
Belli, Emily A., & Candy, Jefferey M.. Neoclassical transport in toroidal plasmas with nonaxisymmetric flux surfaces. United States. doi:10.1088/0741-3335/57/5/054012.
Belli, Emily A., and Candy, Jefferey M.. 2015. "Neoclassical transport in toroidal plasmas with nonaxisymmetric flux surfaces". United States. doi:10.1088/0741-3335/57/5/054012. https://www.osti.gov/servlets/purl/1356343.
@article{osti_1356343,
title = {Neoclassical transport in toroidal plasmas with nonaxisymmetric flux surfaces},
author = {Belli, Emily A. and Candy, Jefferey M.},
abstractNote = {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.},
doi = {10.1088/0741-3335/57/5/054012},
journal = {Plasma Physics and Controlled Fusion},
number = 5,
volume = 57,
place = {United States},
year = {2015},
month = {4}
}