Sign on
ADS Classic is now deprecated. It will be completely retired in October 2019. This page will automatically redirect to the new ADS interface at that point.

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:1903.12511)
· References in the article
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
The importance of the classical channel in the impurity transport of optimized stellarators
Authors:
Buller, S.; Mollén, A.; Newton, S. L.; Smith, H. M.; Pusztai, I.
Affiliation:
AA(Department of Physics, Chalmers University of Technology, SE-41296 Göteborg, Sweden https://orcid.org/0000-0002-0718-6712), AB( https://orcid.org/0000-0002-9257-7864), AE(Department of Physics, Chalmers University of Technology, SE-41296 Göteborg, Sweden https://orcid.org/0000-0001-5412-4090)
Publication:
Journal of Plasma Physics, Volume 85, Issue 4, id.175850401
Publication Date:
08/2019
Origin:
CUP
Keywords:
fusion plasma
Abstract Copyright:
2019: Cambridge University Press
DOI:
10.1017/S002237781900045X
Bibliographic Code:
2019JPlPh..85d1701B

Abstract

In toroidal magnetic confinement devices, such as tokamaks and stellarators, neoclassical transport is usually an order of magnitude larger than its classical counterpart. However, when a high-collisionality species is present in a stellarator optimized for low Pfirsch-Schlüter current, its classical transport can be comparable to the neoclassical transport. In this letter, we compare neoclassical and classical fluxes and transport coefficients calculated for Wendelstein 7-X (W7-X) and Large Helical Device (LHD) cases. In W7-X, we find that the classical transport of a collisional impurity is comparable to the neoclassical transport for all radii, while it is negligible in the LHD cases, except in the vicinity of radii where the neoclassical transport changes sign. In the LHD case, electrostatic potential variations on the flux surface significantly enhance the neoclassical impurity transport, while the classical transport is largely insensitive to this effect in the cases studied.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)


Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints