HSX as an example of a resilient non-resonant divertor
Abstract
This study describes an initial description of the resilient divertor properties of quasi-symmetric (QS) stellarators using the HSX (Helically Symmetric eXperiment) configuration as a test-case. Divertors in high-performance QS stellarators will need to be resilient to changes in plasma configuration that arise due to evolution of plasma pressure profiles and bootstrap currents for divertor design. Resiliency is tested by examining the changes in strike point patterns from the field line following, which arise due to configurational changes. A low strike point variation with high configuration changes corresponds to high resiliency. The HSX edge displays resilient properties with configuration changes arising from the (1) wall position, (2) plasma current, and (3) external coils. The resilient behavior is lost if large edge islands intersect the wall structure. The resilient edge properties are corroborated by heat flux calculations from the fully 3-D plasma simulations using EMC3-EIRENE. Additionally, the strike point patterns are found to correspond to high curvature regions of magnetic flux surfaces.
- Authors:
-
[3];
- Univ. of Wisconsin, Madison, WI (United States)
- Columbia Univ., New York, NY (United States)
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Auburn Univ., Auburn, AL (United States)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1372880
- Alternate Identifier(s):
- OSTI ID: 1349382
- Report Number(s):
- PPPL-5387
Journal ID: ISSN 1070-664X; PHPAEN
- Grant/Contract Number:
- FG02-93ER54222
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 24; Journal Issue: 3; 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
Bader, A., Boozer, A. H., Hegna, C. C., Lazerson, S. A., and Schmitt, J. C. HSX as an example of a resilient non-resonant divertor. United States: N. p., 2017.
Web. doi:10.1063/1.4978494.
Bader, A., Boozer, A. H., Hegna, C. C., Lazerson, S. A., & Schmitt, J. C. HSX as an example of a resilient non-resonant divertor. United States. https://doi.org/10.1063/1.4978494
Bader, A., Boozer, A. H., Hegna, C. C., Lazerson, S. A., and Schmitt, J. C. Thu .
"HSX as an example of a resilient non-resonant divertor". United States. https://doi.org/10.1063/1.4978494. https://www.osti.gov/servlets/purl/1372880.
@article{osti_1372880,
title = {HSX as an example of a resilient non-resonant divertor},
author = {Bader, A. and Boozer, A. H. and Hegna, C. C. and Lazerson, S. A. and Schmitt, J. C.},
abstractNote = {This study describes an initial description of the resilient divertor properties of quasi-symmetric (QS) stellarators using the HSX (Helically Symmetric eXperiment) configuration as a test-case. Divertors in high-performance QS stellarators will need to be resilient to changes in plasma configuration that arise due to evolution of plasma pressure profiles and bootstrap currents for divertor design. Resiliency is tested by examining the changes in strike point patterns from the field line following, which arise due to configurational changes. A low strike point variation with high configuration changes corresponds to high resiliency. The HSX edge displays resilient properties with configuration changes arising from the (1) wall position, (2) plasma current, and (3) external coils. The resilient behavior is lost if large edge islands intersect the wall structure. The resilient edge properties are corroborated by heat flux calculations from the fully 3-D plasma simulations using EMC3-EIRENE. Additionally, the strike point patterns are found to correspond to high curvature regions of magnetic flux surfaces.},
doi = {10.1063/1.4978494},
journal = {Physics of Plasmas},
number = 3,
volume = 24,
place = {United States},
year = {Thu Mar 16 00:00:00 EDT 2017},
month = {Thu Mar 16 00:00:00 EDT 2017}
}
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