Application of the radiating divertor approach to innovative tokamak divertor concepts

T. W. Petrie; S. L. Allen; M. E. Fenstermacher; R. J. Groebner; C. T. Holcomb; E. Kolemen; R. J. La Haye; C. J. Lasnier; A. W. Leonard; T. C. Luce; A. G. McLean; R. Maingi; R. A. Moyer; W. M. Solomon; V. A. Soukhanovskii; F. Turco; J. G. Watkins

doi:10.1016/j.jnucmat.2014.11.008

Application of the radiating divertor approach to innovative tokamak divertor concepts

T. W. Petrie
, S. L. Allen
, M. E. Fenstermacher
, R. J. Groebner
, C. T. Holcomb
, E. Kolemen
, R. J. La Haye
, C. J. Lasnier
, A. W. Leonard
, T. C. Luce
, A. G. McLean
, R. Maingi
, R. A. Moyer
, W. M. Solomon
, V. A. Soukhanovskii
, F. Turco
, J. G. Watkins

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

Abstract We survey the results of recent DIII-D experiments that tested the effectiveness of three innovative tokamak divertor concepts in reducing divertor heat flux while still maintaining acceptable energy confinement under neon/deuterium-based radiating divertor (RD) conditions: (1) magnetically unbalanced high performance double-null divertor (DND) plasmas, (2) high performance double-null "Snowflake" (SF-DN) plasmas, and (3) single-null H-mode plasmas having different isolation from their divertor targets. In general, all three concepts adapt well to RD conditions, achieving significant reduction in divertor heat flux (q⊥_p) and maintaining high performance metrics, e.g., 50-70% reduction in peak divertor heat flux for DND and SF-DN plasmas that are characterized by β_N ≅ 3.0 and H_98(y,2) ≈ 1.35. It is also demonstrated that q ≅_p could be reduced ≈50% by extending the parallel connection length (L_||-XPT) in the scrape-off layer between the X-point and divertor targets over a variety of the RD and non-RD environments tested.

Original language	English (US)
Article number	48602
Pages (from-to)	1225-1228
Number of pages	4
Journal	Journal of Nuclear Materials
Volume	463
DOIs	https://doi.org/10.1016/j.jnucmat.2014.11.008
State	Published - Jul 22 2015

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
General Materials Science
Nuclear Energy and Engineering

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10.1016/j.jnucmat.2014.11.008

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Petrie, T. W., Allen, S. L., Fenstermacher, M. E., Groebner, R. J., Holcomb, C. T., Kolemen, E., La Haye, R. J., Lasnier, C. J., Leonard, A. W., Luce, T. C., McLean, A. G., Maingi, R., Moyer, R. A., Solomon, W. M., Soukhanovskii, V. A., Turco, F., & Watkins, J. G. (2015). Application of the radiating divertor approach to innovative tokamak divertor concepts. Journal of Nuclear Materials, 463, 1225-1228. Article 48602. https://doi.org/10.1016/j.jnucmat.2014.11.008

@article{51bd33cd839b4a2589c142373cd80ac1,

title = "Application of the radiating divertor approach to innovative tokamak divertor concepts",

abstract = "Abstract We survey the results of recent DIII-D experiments that tested the effectiveness of three innovative tokamak divertor concepts in reducing divertor heat flux while still maintaining acceptable energy confinement under neon/deuterium-based radiating divertor (RD) conditions: (1) magnetically unbalanced high performance double-null divertor (DND) plasmas, (2) high performance double-null {"}Snowflake{"} (SF-DN) plasmas, and (3) single-null H-mode plasmas having different isolation from their divertor targets. In general, all three concepts adapt well to RD conditions, achieving significant reduction in divertor heat flux (q⊥p) and maintaining high performance metrics, e.g., 50-70\% reduction in peak divertor heat flux for DND and SF-DN plasmas that are characterized by βN ≅ 3.0 and H98(y,2) ≈ 1.35. It is also demonstrated that q ≅p could be reduced ≈50\% by extending the parallel connection length (L||-XPT) in the scrape-off layer between the X-point and divertor targets over a variety of the RD and non-RD environments tested.",

author = "Petrie, \{T. W.\} and Allen, \{S. L.\} and Fenstermacher, \{M. E.\} and Groebner, \{R. J.\} and Holcomb, \{C. T.\} and E. Kolemen and \{La Haye\}, \{R. J.\} and Lasnier, \{C. J.\} and Leonard, \{A. W.\} and Luce, \{T. C.\} and McLean, \{A. G.\} and R. Maingi and Moyer, \{R. A.\} and Solomon, \{W. M.\} and Soukhanovskii, \{V. A.\} and F. Turco and Watkins, \{J. G.\}",

note = "Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

year = "2015",

month = jul,

day = "22",

doi = "10.1016/j.jnucmat.2014.11.008",

language = "English (US)",

volume = "463",

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Petrie, TW, Allen, SL, Fenstermacher, ME, Groebner, RJ, Holcomb, CT, Kolemen, E, La Haye, RJ, Lasnier, CJ, Leonard, AW, Luce, TC, McLean, AG, Maingi, R, Moyer, RA, Solomon, WM, Soukhanovskii, VA, Turco, F & Watkins, JG 2015, 'Application of the radiating divertor approach to innovative tokamak divertor concepts', Journal of Nuclear Materials, vol. 463, 48602, pp. 1225-1228. https://doi.org/10.1016/j.jnucmat.2014.11.008

TY - JOUR

T1 - Application of the radiating divertor approach to innovative tokamak divertor concepts

AU - Petrie, T. W.

AU - Allen, S. L.

AU - Fenstermacher, M. E.

AU - Groebner, R. J.

AU - Holcomb, C. T.

AU - Kolemen, E.

AU - La Haye, R. J.

AU - Lasnier, C. J.

AU - Leonard, A. W.

AU - Luce, T. C.

AU - McLean, A. G.

AU - Maingi, R.

AU - Moyer, R. A.

AU - Solomon, W. M.

AU - Soukhanovskii, V. A.

AU - Turco, F.

AU - Watkins, J. G.

PY - 2015/7/22

Y1 - 2015/7/22

N2 - Abstract We survey the results of recent DIII-D experiments that tested the effectiveness of three innovative tokamak divertor concepts in reducing divertor heat flux while still maintaining acceptable energy confinement under neon/deuterium-based radiating divertor (RD) conditions: (1) magnetically unbalanced high performance double-null divertor (DND) plasmas, (2) high performance double-null "Snowflake" (SF-DN) plasmas, and (3) single-null H-mode plasmas having different isolation from their divertor targets. In general, all three concepts adapt well to RD conditions, achieving significant reduction in divertor heat flux (q⊥p) and maintaining high performance metrics, e.g., 50-70% reduction in peak divertor heat flux for DND and SF-DN plasmas that are characterized by βN ≅ 3.0 and H98(y,2) ≈ 1.35. It is also demonstrated that q ≅p could be reduced ≈50% by extending the parallel connection length (L||-XPT) in the scrape-off layer between the X-point and divertor targets over a variety of the RD and non-RD environments tested.

AB - Abstract We survey the results of recent DIII-D experiments that tested the effectiveness of three innovative tokamak divertor concepts in reducing divertor heat flux while still maintaining acceptable energy confinement under neon/deuterium-based radiating divertor (RD) conditions: (1) magnetically unbalanced high performance double-null divertor (DND) plasmas, (2) high performance double-null "Snowflake" (SF-DN) plasmas, and (3) single-null H-mode plasmas having different isolation from their divertor targets. In general, all three concepts adapt well to RD conditions, achieving significant reduction in divertor heat flux (q⊥p) and maintaining high performance metrics, e.g., 50-70% reduction in peak divertor heat flux for DND and SF-DN plasmas that are characterized by βN ≅ 3.0 and H98(y,2) ≈ 1.35. It is also demonstrated that q ≅p could be reduced ≈50% by extending the parallel connection length (L||-XPT) in the scrape-off layer between the X-point and divertor targets over a variety of the RD and non-RD environments tested.

UR - https://www.scopus.com/pages/publications/84937675481

UR - https://www.scopus.com/pages/publications/84937675481#tab=citedBy

U2 - 10.1016/j.jnucmat.2014.11.008

DO - 10.1016/j.jnucmat.2014.11.008

M3 - Article

AN - SCOPUS:84937675481

SN - 0022-3115

VL - 463

SP - 1225

EP - 1228

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

M1 - 48602

ER -

Application of the radiating divertor approach to innovative tokamak divertor concepts

Abstract

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