A super-cusp divertor configuration for tokamaks
Abstract
Our study demonstrates a remarkable flexibility of advanced divertor configurations created with the remote poloidal field coils. The emphasis here is on the configurations with three poloidal field nulls in the divertor area. We are seeking the structures where all three nulls lie on the same separatrix, thereby creating two zones of a very strong flux expansion, as envisaged in the concept of Takase’s cusp divertor. It turns out that the set of remote coils can produce a cusp divertor, with additional advantages of: (i) a large stand-off distance between the divertor and the coils and (ii) a thorough control that these coils exert over the fine features of the configuration. In reference to these additional favourable properties acquired by the cusp divertor, the resulting configuration could be called ‘a super-cusp’. General geometrical features of the three-null configurations produced by remote coils are described. Furthermore, issues on the way to practical applications include the need for a more sophisticated control system and possible constraints related to excessively high currents in the divertor coils.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1229805
- Report Number(s):
- LLNL-JRNL-673843
Journal ID: ISSN 0022-3778; TRN: US1600613
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Plasma Physics
- Additional Journal Information:
- Journal Volume: 81; Journal Issue: 05; Journal ID: ISSN 0022-3778
- Publisher:
- Cambridge University Press
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION
Citation Formats
Ryutov, D. D. A super-cusp divertor configuration for tokamaks. United States: N. p., 2015.
Web. doi:10.1017/S0022377815001026.
Ryutov, D. D. A super-cusp divertor configuration for tokamaks. United States. https://doi.org/10.1017/S0022377815001026
Ryutov, D. D. Wed .
"A super-cusp divertor configuration for tokamaks". United States. https://doi.org/10.1017/S0022377815001026. https://www.osti.gov/servlets/purl/1229805.
@article{osti_1229805,
title = {A super-cusp divertor configuration for tokamaks},
author = {Ryutov, D. D.},
abstractNote = {Our study demonstrates a remarkable flexibility of advanced divertor configurations created with the remote poloidal field coils. The emphasis here is on the configurations with three poloidal field nulls in the divertor area. We are seeking the structures where all three nulls lie on the same separatrix, thereby creating two zones of a very strong flux expansion, as envisaged in the concept of Takase’s cusp divertor. It turns out that the set of remote coils can produce a cusp divertor, with additional advantages of: (i) a large stand-off distance between the divertor and the coils and (ii) a thorough control that these coils exert over the fine features of the configuration. In reference to these additional favourable properties acquired by the cusp divertor, the resulting configuration could be called ‘a super-cusp’. General geometrical features of the three-null configurations produced by remote coils are described. Furthermore, issues on the way to practical applications include the need for a more sophisticated control system and possible constraints related to excessively high currents in the divertor coils.},
doi = {10.1017/S0022377815001026},
journal = {Journal of Plasma Physics},
number = 05,
volume = 81,
place = {United States},
year = {Wed Aug 26 00:00:00 EDT 2015},
month = {Wed Aug 26 00:00:00 EDT 2015}
}
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Works referenced in this record:
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Works referencing / citing this record:
A review of radiative detachment studies in tokamak advanced magnetic divertor configurations
journal, April 2017
- Soukhanovskii, V. A.
- Plasma Physics and Controlled Fusion, Vol. 59, Issue 6