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

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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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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

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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)",

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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.

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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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