High-performance double-null plasmas under radiating mantle scenarios on DIII-D

T. W. Petrie; B. Grierson; T. H. Osborne; F. Turco; S. L. Allen; M. E. Fenstermacher; J. R. Ferron; H. Y. Guo; E. Hinson; R. La Haye; C. J. Lasnier; A. W. Leonard; T. C. Luce; C. Petty; D. Thomas; B. Victor; H. Wang; J. G. Watkins

doi:10.1016/j.nme.2019.01.028

High-performance double-null plasmas under radiating mantle scenarios on DIII-D

T. W. Petrie, B. Grierson, T. H. Osborne, F. Turco, S. L. Allen, M. E. Fenstermacher, J. R. Ferron, H. Y. Guo, E. Hinson, R. La Haye, C. J. Lasnier, A. W. Leonard, T. C. Luce, C. Petty, D. Thomas, B. Victor, H. Wang, J. G. Watkins

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

6 Scopus citations

Abstract

Actively enhancing plasma radiated power has been used to reduce divertor heat flux in high power, high-performance double null divertor (DND) and near-DND plasmas in DIII-D, while at the same time maintaining acceptable energy confinement. One form of this approach that we focus on here is the radiating mantle. The effectiveness of the radiating mantle was found to depend strongly on the location of electron cyclotron (EC) heating deposition and on the effect that seed impurities have on triggering inimical MHD activity inside the plasma. In addition, we present experimental support for the predictions made by the ELITE boundary stability code (Snyder et al., 2002, [1]) for ways to improve confinement and fueling in these high-performance plasmas. Representative AT operating conditions were H ₉₈ ≈ 1.4–1.7, β _N ≈ 3–4, and q ₉₅ ≈ 4.7–6.5.

Original language	English
Pages (from-to)	267-272
Number of pages	6
Journal	Nuclear Materials and Energy
Volume	19
DOIs	https://doi.org/10.1016/j.nme.2019.01.028
State	Published - May 2019
Externally published	Yes

Funding

This material is based upon work supported by the U.S. Department of Energy , Office of Science, Office of Fusion Energy Sciences, using the DIII-D National Fusion Facility, a DOE Office of Science user facility, under Award DE-FC02-04ER54698 , and DE-AC52-07NA27344 , DE-AC02-09CH11466 , DE-FG02-04ER54761 , and DE-AC04-94AL850005 . DIII-D data shown in this paper can be obtained in digital format by following the links at https://fusion.gat.com/global/D3D_DMP .

Funders	Funder number
U.S. Department of Energy
Office of Science	DE-AC04-94AL850005, DE-FG02-04ER54761, DE-AC02-09CH11466, DE-FC02-04ER54698, DE-AC52-07NA27344
Fusion Energy Sciences

Keywords

DIII-D
Edge pedestal
Energy confinement
Gas injection and fueling impurity
Power deposition

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.nme.2019.01.028

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Petrie, T. W., Grierson, B., Osborne, T. H., Turco, F., Allen, S. L., Fenstermacher, M. E., Ferron, J. R., Guo, H. Y., Hinson, E., La Haye, R., Lasnier, C. J., Leonard, A. W., Luce, T. C., Petty, C., Thomas, D., Victor, B., Wang, H., & Watkins, J. G. (2019). High-performance double-null plasmas under radiating mantle scenarios on DIII-D. Nuclear Materials and Energy, 19, 267-272. https://doi.org/10.1016/j.nme.2019.01.028

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title = "High-performance double-null plasmas under radiating mantle scenarios on DIII-D",

abstract = " Actively enhancing plasma radiated power has been used to reduce divertor heat flux in high power, high-performance double null divertor (DND) and near-DND plasmas in DIII-D, while at the same time maintaining acceptable energy confinement. One form of this approach that we focus on here is the radiating mantle. The effectiveness of the radiating mantle was found to depend strongly on the location of electron cyclotron (EC) heating deposition and on the effect that seed impurities have on triggering inimical MHD activity inside the plasma. In addition, we present experimental support for the predictions made by the ELITE boundary stability code (Snyder et al., 2002, [1]) for ways to improve confinement and fueling in these high-performance plasmas. Representative AT operating conditions were H 98 ≈ 1.4–1.7, β N ≈ 3–4, and q 95 ≈ 4.7–6.5.",

keywords = "DIII-D, Edge pedestal, Energy confinement, Gas injection and fueling impurity, Power deposition",

author = "Petrie, {T. W.} and B. Grierson and Osborne, {T. H.} and F. Turco and Allen, {S. L.} and Fenstermacher, {M. E.} and Ferron, {J. R.} and Guo, {H. Y.} and E. Hinson and {La Haye}, R. and Lasnier, {C. J.} and Leonard, {A. W.} and Luce, {T. C.} and C. Petty and D. Thomas and B. Victor and H. Wang and Watkins, {J. G.}",

note = "Publisher Copyright: {\textcopyright} 2019",

year = "2019",

month = may,

doi = "10.1016/j.nme.2019.01.028",

language = "English",

volume = "19",

pages = "267--272",

journal = "Nuclear Materials and Energy",

issn = "2352-1791",

publisher = "Elsevier",

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Petrie, TW, Grierson, B, Osborne, TH, Turco, F, Allen, SL, Fenstermacher, ME, Ferron, JR, Guo, HY, Hinson, E, La Haye, R, Lasnier, CJ, Leonard, AW, Luce, TC, Petty, C, Thomas, D, Victor, B, Wang, H & Watkins, JG 2019, 'High-performance double-null plasmas under radiating mantle scenarios on DIII-D', Nuclear Materials and Energy, vol. 19, pp. 267-272. https://doi.org/10.1016/j.nme.2019.01.028

TY - JOUR

T1 - High-performance double-null plasmas under radiating mantle scenarios on DIII-D

AU - Petrie, T. W.

AU - Grierson, B.

AU - Osborne, T. H.

AU - Turco, F.

AU - Allen, S. L.

AU - Fenstermacher, M. E.

AU - Ferron, J. R.

AU - Guo, H. Y.

AU - Hinson, E.

AU - La Haye, R.

AU - Lasnier, C. J.

AU - Leonard, A. W.

AU - Luce, T. C.

AU - Petty, C.

AU - Thomas, D.

AU - Victor, B.

AU - Wang, H.

AU - Watkins, J. G.

PY - 2019/5

Y1 - 2019/5

N2 - Actively enhancing plasma radiated power has been used to reduce divertor heat flux in high power, high-performance double null divertor (DND) and near-DND plasmas in DIII-D, while at the same time maintaining acceptable energy confinement. One form of this approach that we focus on here is the radiating mantle. The effectiveness of the radiating mantle was found to depend strongly on the location of electron cyclotron (EC) heating deposition and on the effect that seed impurities have on triggering inimical MHD activity inside the plasma. In addition, we present experimental support for the predictions made by the ELITE boundary stability code (Snyder et al., 2002, [1]) for ways to improve confinement and fueling in these high-performance plasmas. Representative AT operating conditions were H 98 ≈ 1.4–1.7, β N ≈ 3–4, and q 95 ≈ 4.7–6.5.

AB - Actively enhancing plasma radiated power has been used to reduce divertor heat flux in high power, high-performance double null divertor (DND) and near-DND plasmas in DIII-D, while at the same time maintaining acceptable energy confinement. One form of this approach that we focus on here is the radiating mantle. The effectiveness of the radiating mantle was found to depend strongly on the location of electron cyclotron (EC) heating deposition and on the effect that seed impurities have on triggering inimical MHD activity inside the plasma. In addition, we present experimental support for the predictions made by the ELITE boundary stability code (Snyder et al., 2002, [1]) for ways to improve confinement and fueling in these high-performance plasmas. Representative AT operating conditions were H 98 ≈ 1.4–1.7, β N ≈ 3–4, and q 95 ≈ 4.7–6.5.

KW - DIII-D

KW - Edge pedestal

KW - Energy confinement

KW - Gas injection and fueling impurity

KW - Power deposition

UR - http://www.scopus.com/inward/record.url?scp=85062439780&partnerID=8YFLogxK

U2 - 10.1016/j.nme.2019.01.028

DO - 10.1016/j.nme.2019.01.028

M3 - Article

AN - SCOPUS:85062439780

SN - 2352-1791

VL - 19

SP - 267

EP - 272

JO - Nuclear Materials and Energy

JF - Nuclear Materials and Energy

ER -

High-performance double-null plasmas under radiating mantle scenarios on DIII-D

Abstract

Funding

Keywords

UN SDGs

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