Study of argon assimilation into the post-disruption runaway electron plateau in DIII-D and comparison with a 1D diffusion model

被引：17

作者：

Hollmann, E. M. ^{[1
]}

Eidietis, N. W. ^{[2
]}

Herfindal, J. L. ^{[3
]}

Parks, P. B. ^{[2
]}

Pigarov, A. Y. ^{[1
]}

Shiraki, D. ^{[3
]}

Austin, M. E. ^{[4
]}

Bardoczi, L. ^{[2
]}

Baylor, L. ^{[3
]}

Bykov, I ^{[1
]}

Carlstrom, T. N. ^{[2
]}

Kaplan, D. ^{[2
]}

Lasnier, C. J. ^{[5
]}

Lvovskiy, A. ^{[2
]}

Moser, A. ^{[2
]}

Moyer, R. A. ^{[1
]}

Paz-Soldan, C. ^{[2
]}

Rudakov, D. L. ^{[1
]}

Samuell, C. ^{[5
]}

Shafer, M. ^{[3
]}

Van Zeeland, M. ^{[2
]}

Welander, A. ^{[2
]}

Wilcox, R. ^{[3
]}

机构：

[1] Univ Calif San Diego, 9500 Gilman Dr, La Jolla, CA 92093 USA

[2] Gen Atom Co, POB 85608, San Diego, CA 92186 USA

[3] Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA

[4] Univ Texas Austin, Inst Fus Studies, 2100 San Jacinto Blvd, Austin, TX 78712 USA

[5] Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA

来源：

NUCLEAR FUSION | 2019年 / 59卷 / 10期

关键词：

disruption; runaway electrons; tokamak; CROSS-SECTIONS; DISSOCIATIVE RECOMBINATION; ENERGY; IONS; IONIZATION; HYDROGEN; NEON;

D O I：

10.1088/1741-4326/ab32b2

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The assimilation of argon injected into post-disruption runaway electron (RE) plateaus is studied and compared to the vertical loss rate for vertically unstable RE plateaus. A 1D diffusion model is developed to include neutral diffusion and ionization and is used to help in data interpretation. It is found that the radial mixing time scale of argon ions (similar to 0.05 s) is comparable to the vertical loss timescale. Neutral argon becomes the dominant Ar species in the RE plateau for large Ar numbers (> 3 x 10(21)); at the same time the neutral Ar diffusivity decreases due to plasma cooling, causing a saturation in the assimilation of injected Ar on the vertical loss time scale. Injection of Ar into vertically unstable RE plateaus in DIII-D does increase the vertical loss rate, as predicted by previous modeling of ITER. However, there is a decreasing trend in RE current at the wall strike as the Ar quantity is turned up or as the Ar is injected earlier, indicating a decrease in RE energy deposited to the wall.

引用

页数：19

共 17 条

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Eidietis, N. W.
Commaux, N.
Hollmann, E. M.
Humphreys, D. A.
Jernigan, T. C.
Moyer, R. A.
Strait, E. J.
VanZeeland, M. A.
Wesley, J. C.
Yu, J. H.
PHYSICS OF PLASMAS, 2012, 19 (05)
[2] Study of argon expulsion from the post-disruption runaway electron plateau following low-Z massive gas injection in DIII-D
Hollmann, E. M.
Bykov, I.
Eidietis, N. W.
Herfindal, J. L.
Lvovskiy, A.
Moyer, R. A.
Parks, P. B.
Paz-Soldan, C.
Pigarov, A. Yu.
Rudakov, D. L.
Shiraki, D.
Watkins, J.
PHYSICS OF PLASMAS, 2020, 27 (04)
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Shiraki, D.
Commaux, N.
Baylor, L. R.
Cooper, C. M.
Eidietis, N. W.
Hollmann, E. M.
Paz-Soldan, C.
Combs, S. K.
Meitner, S. J.
NUCLEAR FUSION, 2018, 58 (05)
[4] Analysis of shot-to-shot variability in post-disruption runaway electron currents for diverted DIII-D discharges
Izzo, V. A.
Humphreys, D. A.
Kornbluth, M.
PLASMA PHYSICS AND CONTROLLED FUSION, 2012, 54 (09)
[5] Simulation of DIII-D disruption with argon pellet injection and runaway electron beam
Zhao, C.
Liu, C.
Jardin, S. C.
Ferraro, N. M.
Lyons, B. C.
NUCLEAR FUSION, 2024, 64 (12)
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Hollmann, E. M.
Marini, C.
Rudakov, D. L.
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Herfindal, J. L.
Shiraki, D.
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Kulachenko, A.
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PLASMA PHYSICS AND CONTROLLED FUSION, 2025, 67 (03)
[7] MARS-F modeling of post-disruption runaway beam loss by magnetohydrodynamic instabilities in DIII-D
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NUCLEAR FUSION, 2019, 59 (12)
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Paz-Soldan, C.
Eidietis, N. W.
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Lvovskiy, A.
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Cooper, C. M.
del-Castillo-Negrete, D.
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Fulop, T.
Herfindal, J.
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Thome, K. E.
NUCLEAR FUSION, 2019, 59 (06)
[9] Study of Z scaling of runaway electron plateau final loss energy deposition into wall of DIII-D
Hollmann, E. M.
Commaux, N.
Eidietis, N. W.
Lasnier, C. J.
Rudakov, D. L.
Shiraki, D.
Cooper, C.
Martin-Solis, J. R.
Parks, P. B.
Paz-Soldan, C.
PHYSICS OF PLASMAS, 2017, 24 (06)
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Lvovskiy, A.
Paz-Soldan, C.
Eidietis, N. W.
Dal Molin, A.
Du, X. D.
Giacomelli, L.
Herfindal, J. L.
Hollmann, E. M.
Martinelli, L.
Moyer, R. A.
Nocente, M.
Rigamonti, D.
Shiraki, D.
Tardocchi, M.
Thome, K. E.
PLASMA PHYSICS AND CONTROLLED FUSION, 2018, 60 (12)

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