Achievement of Reactor-Relevant Performance in Negative Triangularity Shape in the DIII-D Tokamak

被引：138

作者：

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

Marinoni, A. ^{[2
]}

Walker, M. L. ^{[3
]}

Brookman, M. W. ^{[3
]}

deGrassie, J. S. ^{[3
]}

Hyatt, A. W. ^{[3
]}

McKee, G. R. ^{[4
]}

Petty, C. C. ^{[3
]}

Rhodes, T. L. ^{[5
]}

Smith, S. P. ^{[3
]}

Sung, C. ^{[6
]}

Thome, K. E. ^{[3
]}

Turnbull, A. D. ^{[3
]}

机构：

[1] Univ Texas Austin, Austin, TX 78712 USA

[2] MIT, Plasma Sci & Fus Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[3] Gen Atom, San Diego, CA 92186 USA

[4] Univ Wisconsin, Madison, WI 53706 USA

[5] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[6] Lam Res Corp, Fremont, CA 94538 USA

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 122卷 / 11期

关键词：

PLASMAS; LIMITS;

D O I：

10.1103/PhysRevLett.122.115001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Plasma discharges with a negative triangularity (delta = -0.4) shape have been created in the DIII-D tokamak with a significant normalized beta (beta(N) = 2.7) and confinement characteristic of the high confinement mode (H-98y2 = 1.2) despite the absence of an edge pressure pedestal and no edge localized modes (ELMs). These inner-wall-limited plasmas have a similar global performance as a positive triangularity (delta = +0.4) ELMing H-mode discharge with the same plasma current, elongation and cross sectional area. For cases both of dominant electron cyclotron heating with T-e/T-i > 1 and dominant neutral beam injection heating with T-e/T-i = 1, turbulent fluctuations over radii 0.5 < rho < 0.9 were reduced by 10-50% in the negative triangularity shape compared to the matching positive triangularity shape, depending on the radius and conditions.

引用

页数：5

共 24 条

[1] Role of Plasma Elongation on Turbulent Transport in Magnetically Confined Plasmas
Angelino, P.
Garbet, X.
Villard, L.
Bottino, A.
Jolliet, S.
Ghendrih, Ph.
Grandgirard, V.
McMillan, B. F.
Sarazin, Y.
Dif-Pradalier, G.
Tran, T. M.
[J]. PHYSICAL REVIEW LETTERS, 2009, 102 (19)
[2] [Anonymous], NUCL FUSION
[3] GATO - AN MHD STABILITY CODE FOR AXISYMMETRIC PLASMAS WITH INTERNAL SEPARATRICES
BERNARD, LC
HELTON, FJ
MOORE, RW
[J]. COMPUTER PHYSICS COMMUNICATIONS, 1981, 24 (3-4) : 377 - 380
[4] Discovery of stationary operation of quiescent H-mode plasmas with net-zero neutral beam injection torque and high energy confinement on DIII-D
Burrell, K. H.
Barada, K.
Chen, X.
Garofalo, A. M.
Groebner, R. J.
Muscatello, C. M.
Osborne, T. H.
Petty, C. C.
Rhodes, T. L.
Snyder, P. B.
Solomon, W. M.
Yan, Z.
Zeng, L.
[J]. PHYSICS OF PLASMAS, 2016, 23 (05)
[5] Quiescent double barrier high-confinement mode plasmas in the DIII-D tokamak
Burrell, KH
Austin, ME
Brennan, DP
DeBoo, JC
Doyle, EJ
Fenzi, C
Fuchs, C
Gohil, P
Greenfield, CM
Groebner, RJ
Lao, LL
Luce, TC
Makowski, MA
McKee, GR
Moyer, RA
Petty, CC
Porkolab, M
Rettig, CL
Rhodes, TL
Rost, JC
Stallard, BW
Strait, EJ
Synakowski, EJ
Wade, MR
Watkins, JG
West, WP
[J]. PHYSICS OF PLASMAS, 2001, 8 (05) : 2153 - 2162
[6] Impact of plasma triangularity and collisionality on electron heat transport in TCV L-mode plasmas
Camenen, Y.
Pochelon, A.
Behn, R.
Bottino, A.
Bortolon, A.
Coda, S.
Karpushov, A.
Sauter, O.
Zhuang, G.
[J]. NUCLEAR FUSION, 2007, 47 (07) : 510 - 516
[7] A high-accuracy Euleriangyrokinetic solver for collisional plasmas
Candy, J.
Belli, E. A.
Bravenec, R. V.
[J]. JOURNAL OF COMPUTATIONAL PHYSICS, 2016, 324 : 73 - 93
[8] Localized measurement of short wavelength plasma fluctuations with the DIII-D phase contrast imaging diagnostic
Dorris, J. R.
Rost, J. C.
Porkolab, M.
[J]. REVIEW OF SCIENTIFIC INSTRUMENTS, 2009, 80 (02)
[9] Dependence of the L-Mode scrape-off layer power fall-off length on the upper triangularity in TCV
Faitsch, M.
Maurizio, R.
Gallo, A.
Coda, S.
Eich, T.
Labit, B.
Merle, A.
Reimerdes, H.
Sieglin, B.
Theiler, C.
[J]. PLASMA PHYSICS AND CONTROLLED FUSION, 2018, 60 (04)
[10] The effect of triangularity on fluctuations in a tokamak plasma
Fontana, M.
Porte, L.
Coda, S.
Sauter, O.
[J]. NUCLEAR FUSION, 2018, 58 (02)

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