HSX as an example of a resilient non-resonant divertor

Bader, A.; Boozer, A. H.; Hegna, C. C.; Lazerson, S. A.; Schmitt, J. C.

doi:10.1063/1.4978494

Title: HSX as an example of a resilient non-resonant divertor

Journal Article · Thu Mar 16 00:00:00 EDT 2017 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4978494· OSTI ID:1372880

Bader, A. ^[1]; Boozer, A. H. ^[2]; Hegna, C. C. ^[1];

^[3]; Schmitt, J. C. ^[4]

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)

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.

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Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-93ER54222

OSTI ID:: 1372880

Alternate ID(s):: OSTI ID: 1349382

Report Number(s):: PPPL-5387; PHPAEN

Journal Information:: Physics of Plasmas, Vol. 24, Issue 3; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 16 works

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References (46)

Physics of island divertors as highlighted by the example of W7-AS Feng, Y.; Sardei, F.; Grigull, P. Nuclear Fusion, Vol. 46, Issue 8 https://doi.org/10.1088/0029-5515/46/8/006	journal	July 2006
EMC3-EIRENE Simulation of Impurity Transport in Comparison with EUV Emission Measurements in the Stochastic Layer of LHD: Effects of Force Balance and Transport Coefficients: EMC3-EIRENE Simulation of Impurity Transport in Comparison with EUV Emission Measurements in the Stochastic Layer of LHD: Effects of Force Balance and Dai, S.; Kobayashi, M.; Kawamura, G. Contributions to Plasma Physics, Vol. 56, Issue 6-8 https://doi.org/10.1002/ctpp.201610036	journal	June 2016
Modeling of helium transport and exhaust in the LHD edge Bader, A.; Kobayashi, M.; Schmitz, O. Plasma Physics and Controlled Fusion, Vol. 58, Issue 12 https://doi.org/10.1088/0741-3335/58/12/124006	journal	October 2016
Impact of 3D magnetic field structure on boundary and divertor plasmas in stellarator/heliotron devices Kobayashi, M.; Feng, Y.; Xu, Y. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2015.01.011	journal	August 2015
Divertor operation in stellarators: results from W7-AS and implications for future devices Grigull, P.; McCormick, K.; Renner, H. Fusion Engineering and Design, Vol. 66-68 https://doi.org/10.1016/S0920-3796(03)00121-2	journal	September 2003
First measurements of error fields on W7-X using flux surface mapping Lazerson, Samuel A.; Otte, Matthias; Bozhenkov, Sergey Nuclear Fusion, Vol. 56, Issue 10 https://doi.org/10.1088/0029-5515/56/10/106005	journal	August 2016
Thirty years of turnstiles and transport Meiss, J. D. Chaos: An Interdisciplinary Journal of Nonlinear Science, Vol. 25, Issue 9 https://doi.org/10.1063/1.4915831	journal	September 2015
Neutral particle modelling and particle exhaust in the Wendelstein 7-X stellarator Grote, H.; Kisslinger, J.; Renner, H. Journal of Nuclear Materials, Vol. 313-316 https://doi.org/10.1016/S0022-3115(02)01503-9	journal	March 2003
On impurity handling in high performance stellarator/heliotron plasmas Burhenn, R.; Feng, Y.; Ida, K. Nuclear Fusion, Vol. 49, Issue 6 https://doi.org/10.1088/0029-5515/49/6/065005	journal	April 2009
Magnetic field line diversion in Helias stellarator configurations: perspectives for divertor operation Strumberger, E. Nuclear Fusion, Vol. 32, Issue 5 https://doi.org/10.1088/0029-5515/32/5/I02	journal	May 1992
Physics optimization of stellarators Grieger, G.; Lotz, W.; Merkel, P. Physics of Fluids B: Plasma Physics, Vol. 4, Issue 7 https://doi.org/10.1063/1.860481	journal	March 1992
SOL studies for W7-X based on the island divertor concept Strumberger, E. Nuclear Fusion, Vol. 36, Issue 7 https://doi.org/10.1088/0029-5515/36/7/I06	journal	July 1996
3D Edge Modeling and Island Divertor Physics Feng, Y.; Sardei, F.; Kisslinger, J. Contributions to Plasma Physics, Vol. 44, Issue 13 https://doi.org/10.1002/ctpp.200410009	journal	April 2004
Experimental Demonstration of Improved Neoclassical Transport with Quasihelical Symmetry Canik, J. M.; Anderson, D. T.; Anderson, F. S. B. Physical Review Letters, Vol. 98, Issue 8 https://doi.org/10.1103/PhysRevLett.98.085002	journal	February 2007
Comparison between stellarator and tokamak divertor transport Feng, Y.; Kobayashi, M.; Lunt, T. Plasma Physics and Controlled Fusion, Vol. 53, Issue 2 https://doi.org/10.1088/0741-3335/53/2/024009	journal	January 2011
Homoclinic tangle in tokamak divertors Punjabi, Alkesh; Boozer, Allen Physics Letters A, Vol. 378, Issue 32-33 https://doi.org/10.1016/j.physleta.2014.06.027	journal	June 2014
Divertor concept for the W7-X stellarator and mode of operation Renner, H.; Boscary, J.; Greuner, H. Plasma Physics and Controlled Fusion, Vol. 44, Issue 6 https://doi.org/10.1088/0741-3335/44/6/325	journal	May 2002
The Large Helical Device (LHD) helical divertor Ohyabu, N.; Watanabe, T.; Ji, H. Nuclear Fusion, Vol. 34, Issue 3 https://doi.org/10.1088/0029-5515/34/3/I07	journal	March 1994
Ideal MHD spectrum calculations for the ARIES-CS configuration Turnbull, A. D.; Cooper, W. A.; Lao, L. L. Nuclear Fusion, Vol. 51, Issue 12 https://doi.org/10.1088/0029-5515/51/12/123011	journal	November 2011
MOMCON: A spectral code for obtaining three-dimensional magnetohydrodynamic equilibria Hirshman, S. P.; Lee, D. K. Computer Physics Communications, Vol. 39, Issue 2 https://doi.org/10.1016/0010-4655(86)90127-X	journal	February 1986
Design and Analysis of Divertor Scraper Elements for the W7-X Stellarator Lore, Jeremy D.; Andreeva, Tamara; Boscary, Jean IEEE Transactions on Plasma Science, Vol. 42, Issue 3 https://doi.org/10.1109/TPS.2014.2303649	journal	March 2014
Neutral pressure behavior for diverted discharges in the Wendelstein 7-AS Stellarator McCormick, K.; Grigull, P.; Burhenn, R. Journal of Nuclear Materials, Vol. 337-339 https://doi.org/10.1016/j.jnucmat.2004.10.052	journal	March 2005
Experimental Evidence of Reduced Plasma Flow Damping with Quasisymmetry Gerhardt, S. P.; Talmadge, J. N.; Canik, J. M. Physical Review Letters, Vol. 94, Issue 1 https://doi.org/10.1103/PhysRevLett.94.015002	journal	January 2005
Plasma transport in stochastic magnetic field caused by vacuum resonant magnetic perturbations at diverted tokamak edge Park, G.; Chang, C. S.; Joseph, I. Physics of Plasmas, Vol. 17, Issue 10 https://doi.org/10.1063/1.3487733	journal	October 2010
Advanced Divertor Concepts for Helical Devices Ohyabu, N.; Renner, H. Contributions to Plasma Physics, Vol. 38, Issue 1-2 https://doi.org/10.1002/ctpp.2150380114	journal	January 1998
Review of the high heat flux testing as an integrated part of W7-X divertor development Greuner, H.; Böswirth, B.; Boscary, J. Fusion Engineering and Design, Vol. 84, Issue 2-6 https://doi.org/10.1016/j.fusengdes.2008.12.083	journal	June 2009
Fluid features of the stochastic layer transport in LHD Feng, Y.; Kobayashi, M.; Morisaki, T. Nuclear Fusion, Vol. 48, Issue 2 https://doi.org/10.1088/0029-5515/48/2/024012	journal	January 2008
The divertor program in stellarators K. nig, R.; Grigull, P.; McCormick, K. Plasma Physics and Controlled Fusion, Vol. 44, Issue 11 https://doi.org/10.1088/0741-3335/44/11/306	journal	October 2002
The capabilities of steady state operation at the stellarator W7-X with emphasis on divertor design Renner, H.; Boscary, J.; Erckmann, V. Nuclear Fusion, Vol. 40, Issue 6 https://doi.org/10.1088/0029-5515/40/6/306	journal	June 2000
Quasi-helically symmetric toroidal stellarators Nührenberg, J.; Zille, R. Physics Letters A, Vol. 129, Issue 2 https://doi.org/10.1016/0375-9601(88)90080-1	journal	May 1988
Initial experiments towards edge plasma control with a closed helical divertor in LHD Morisaki, T.; Masuzaki, S.; Kobayashi, M. Nuclear Fusion, Vol. 53, Issue 6 https://doi.org/10.1088/0029-5515/53/6/063014	journal	May 2013
Divertor Configuration and Heat Load Studies for the ARIES-CS Fusion Power Plant Mau, T. K.; Kaiser, T. B.; Grossman, A. A. Fusion Science and Technology, Vol. 54, Issue 3 https://doi.org/10.13182/FST08-27	journal	October 2008
Physics of the compact advanced stellarator NCSX Zarnstorff, M. C.; Berry, L. A.; Brooks, A. Plasma Physics and Controlled Fusion, Vol. 43, Issue 12A https://doi.org/10.1088/0741-3335/43/12A/318	journal	November 2001
The Divertor, a Device for Reducing the Impurity Level in a Stellarator Burnett, C. R.; Grove, D. J.; Palladino, R. W. Physics of Fluids, Vol. 1, Issue 5 https://doi.org/10.1063/1.1724361	journal	January 1958
Ergodic edge region of large helical device Morisaki, T.; Narihara, K.; Masuzaki, S. Journal of Nuclear Materials, Vol. 313-316 https://doi.org/10.1016/S0022-3115(02)01467-8	journal	March 2003
Enhancement of helium exhaust by resonant magnetic perturbation fields at LHD and TEXTOR Schmitz, O.; Ida, K.; Kobayashi, M. Nuclear Fusion, Vol. 56, Issue 10 https://doi.org/10.1088/0029-5515/56/10/106011	journal	August 2016
Simulations of edge configurations in quasi-helically symmetric geometry using EMC3–EIRENE Bader, A.; Anderson, D. T.; Hegna, C. C. Nuclear Fusion, Vol. 53, Issue 11 https://doi.org/10.1088/0029-5515/53/11/113036	journal	October 2013
Three-dimensional scrape off layer transport in the helically symmetric experiment HSX Akerson, A. R.; Bader, A.; Hegna, C. C. Plasma Physics and Controlled Fusion, Vol. 58, Issue 8 https://doi.org/10.1088/0741-3335/58/8/084002	journal	June 2016
Stellarator design Boozer, Allen H. Journal of Plasma Physics, Vol. 81, Issue 6 https://doi.org/10.1017/S0022377815001373	journal	December 2015
Measurement of a helical Pfirsch–Schlüter current with reduced magnitude in HSX Schmitt, J. C.; Talmadge, J. N.; Anderson, D. T. Nuclear Fusion, Vol. 53, Issue 8 https://doi.org/10.1088/0029-5515/53/8/082001	journal	July 2013
A 3D Monte-Carlo study of the W7-X island divertor transport for different magnetic configurations Sharma, D.; Feng, Y.; Sardei, F. Nuclear Fusion, Vol. 46, Issue 4 https://doi.org/10.1088/0029-5515/46/4/S03	journal	March 2006
Neutral Gas Compression in the Helical Divertor with a Baffle Structure in the LHD Heliotron Masuzaki, Suguru; Kobayashi, Masahiro; Shoji, Mamoru Plasma and Fusion Research, Vol. 6 https://doi.org/10.1585/pfr.6.1202007	journal	January 2011
Access to edge scenarios for testing a scraper element in early operation phases of Wendelstein 7-X Hölbe, H.; Sunn Pedersen, T.; Geiger, J. Nuclear Fusion, Vol. 56, Issue 2 https://doi.org/10.1088/0029-5515/56/2/026015	journal	January 2016
Developments and high heat flux tests of divertor components for LHD Kubota, Y.; Noda, N.; Sagara, A. Fusion Engineering and Design, Vol. 39-40 https://doi.org/10.1016/S0920-3796(98)00109-4	journal	September 1998
The Helically Symmetric Experiment, (HSX) Goals, Design and Status Anderson, F. Simon B.; Almagri, Abdulgader F.; Anderson, David T. Fusion Technology, Vol. 27, Issue 3T https://doi.org/10.13182/FST95-A11947086	journal	April 1995
Thirty Years of Turnstiles and Transport Meiss, J. D. arXiv https://doi.org/10.48550/arxiv.1501.04364	text	January 2015

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