A stable corridor for toroidal plasma compression
Abstract
In this study, a toroidal plasma compressed by a collapsing flux conserver is analyzed to reveal stable scenarios of operation to high compression ratios. The resistive and ideal MHD stability is calculated in full toroidal geometry, using the asymptotic matching method in realistic conditions, and comparing with nonlinear simulations. The near edge current profile, controlled by toroidal field ramping during compression, is shown to be critical to stability due to coupling between poloidal components of the least stable mode. The extension of a length of shaft on axis is also found to be critical at high compression, as the resulting good curvature region in magnetic field stabilizes pressure driven modes that would otherwise be unstable. This work extends from previous studies, which initially showed the existence of a stable scenario, to include findings of more extensive stable zones, detailed effects of geometry, and nonlinear simulations of the instabilities. The nonlinear simulations of the compression are consistent with the linear analyses, confirming both the conservation and stability properties.
- Authors:
-
[1];
[2];
[2];
[1];
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- General Fusion Inc., Burnaby, BC (Canada)
- Univ. of British Columbia, Vancouver, BC (Canada)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1809084
- Grant/Contract Number:
- AC02-09CH11466
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Fusion
- Additional Journal Information:
- Journal Volume: 61; Journal Issue: 4; Journal ID: ISSN 0029-5515
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Brennan, Dylan, Froese, Aaron, Reynolds, Meritt, Barsky, Sandra, Wen, Alex, Wang, Zhirui, Delage, Michael, and Laberge, Michel. A stable corridor for toroidal plasma compression. United States: N. p., 2021.
Web. doi:10.1088/1741-4326/abe68c.
Brennan, Dylan, Froese, Aaron, Reynolds, Meritt, Barsky, Sandra, Wen, Alex, Wang, Zhirui, Delage, Michael, & Laberge, Michel. A stable corridor for toroidal plasma compression. United States. https://doi.org/10.1088/1741-4326/abe68c
Brennan, Dylan, Froese, Aaron, Reynolds, Meritt, Barsky, Sandra, Wen, Alex, Wang, Zhirui, Delage, Michael, and Laberge, Michel. Mon .
"A stable corridor for toroidal plasma compression". United States. https://doi.org/10.1088/1741-4326/abe68c. https://www.osti.gov/servlets/purl/1809084.
@article{osti_1809084,
title = {A stable corridor for toroidal plasma compression},
author = {Brennan, Dylan and Froese, Aaron and Reynolds, Meritt and Barsky, Sandra and Wen, Alex and Wang, Zhirui and Delage, Michael and Laberge, Michel},
abstractNote = {In this study, a toroidal plasma compressed by a collapsing flux conserver is analyzed to reveal stable scenarios of operation to high compression ratios. The resistive and ideal MHD stability is calculated in full toroidal geometry, using the asymptotic matching method in realistic conditions, and comparing with nonlinear simulations. The near edge current profile, controlled by toroidal field ramping during compression, is shown to be critical to stability due to coupling between poloidal components of the least stable mode. The extension of a length of shaft on axis is also found to be critical at high compression, as the resulting good curvature region in magnetic field stabilizes pressure driven modes that would otherwise be unstable. This work extends from previous studies, which initially showed the existence of a stable scenario, to include findings of more extensive stable zones, detailed effects of geometry, and nonlinear simulations of the instabilities. The nonlinear simulations of the compression are consistent with the linear analyses, confirming both the conservation and stability properties.},
doi = {10.1088/1741-4326/abe68c},
journal = {Nuclear Fusion},
number = 4,
volume = 61,
place = {United States},
year = {Mon Mar 22 00:00:00 EDT 2021},
month = {Mon Mar 22 00:00:00 EDT 2021}
}
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