Simulation of stellarator divertors
Abstract
The nested magnetic surfaces that confine a fusion plasma can be developed to be bounded by a limiter or a divertor. For a limiter, confining surfaces extend until they intercept a part of the surrounding structure. For a divertor, an outermost confining magnetic surface exists, which is well separated from the surrounding structures. The only designs that are thought to be fusion relevant have divertors that direct field lines from the plasma edge into chambers where the particle exhaust can be pumped and the residual heat exhaust can be handled. The topological properties of magnetic field lines just outside the outermost confining surface determine much of the physics of divertors. Axisymmetric tokamak divertors are well-known, and the outermost confining surface is defined by a sharp separatrix. The topology of the magnetic field lines associated with a stellarator divertor is far more subtle. Related subtleties arise in tokamak divertors when subjected to sufficiently strong non-axisymmetric perturbations.Here, an efficient simulation method for carrying out topological studies of non-axisymmetric divertors is created and illustrative results are given.
- Authors:
-
- Columbia Univ., New York, NY (United States)
- Hampton Univ., Hampton, VA (United States)
- Publication Date:
- Research Org.:
- Hampton Univ., Hampton, VA (United States); Univ. of California, Oakland, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1540242
- Alternate Identifier(s):
- OSTI ID: 1471440
- Grant/Contract Number:
- FG02-01ER54624; FG02-04ER54793; AC02-05CH11231; FG02-95ER5433
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 25; Journal Issue: 9; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Boozer, Allen H., and Punjabi, Alkesh. Simulation of stellarator divertors. United States: N. p., 2018.
Web. doi:10.1063/1.5042666.
Boozer, Allen H., & Punjabi, Alkesh. Simulation of stellarator divertors. United States. https://doi.org/10.1063/1.5042666
Boozer, Allen H., and Punjabi, Alkesh. Wed .
"Simulation of stellarator divertors". United States. https://doi.org/10.1063/1.5042666. https://www.osti.gov/servlets/purl/1540242.
@article{osti_1540242,
title = {Simulation of stellarator divertors},
author = {Boozer, Allen H. and Punjabi, Alkesh},
abstractNote = {The nested magnetic surfaces that confine a fusion plasma can be developed to be bounded by a limiter or a divertor. For a limiter, confining surfaces extend until they intercept a part of the surrounding structure. For a divertor, an outermost confining magnetic surface exists, which is well separated from the surrounding structures. The only designs that are thought to be fusion relevant have divertors that direct field lines from the plasma edge into chambers where the particle exhaust can be pumped and the residual heat exhaust can be handled. The topological properties of magnetic field lines just outside the outermost confining surface determine much of the physics of divertors. Axisymmetric tokamak divertors are well-known, and the outermost confining surface is defined by a sharp separatrix. The topology of the magnetic field lines associated with a stellarator divertor is far more subtle. Related subtleties arise in tokamak divertors when subjected to sufficiently strong non-axisymmetric perturbations.Here, an efficient simulation method for carrying out topological studies of non-axisymmetric divertors is created and illustrative results are given.},
doi = {10.1063/1.5042666},
journal = {Physics of Plasmas},
number = 9,
volume = 25,
place = {United States},
year = {Wed Sep 19 00:00:00 EDT 2018},
month = {Wed Sep 19 00:00:00 EDT 2018}
}
Web of Science
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Works referencing / citing this record:
Simulation of non-resonant stellarator divertor
journal, January 2020
- Punjabi, Alkesh; Boozer, Allen H.
- Physics of Plasmas, Vol. 27, Issue 1
Direct measurements of counter-streaming flows in a low-shear stellarator magnetic island topology
journal, September 2019
- Perseo, V.; Effenberg, F.; Gradic, D.
- Nuclear Fusion, Vol. 59, Issue 12
Simulation of non-resonant stellarator divertor
text, January 2021
- Punjabi, Alkesh; Boozer, Allen H.
- arXiv