Optimizing the Super H-mode pedestal to improve performance and facilitate divertor integration

被引：14

作者：

Knolker, M. ^{[1
]}

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

Evans, T. E. ^{[2
]}

Wilks, T. ^{[3
]}

Eldon, D. ^{[2
]}

Grierson, B. ^{[4
]}

Jaervinen, A. ^{[5
]}

Jian, X. ^{[6
]}

Laggner, F. ^{[4
]}

McClenaghan, J. ^{[2
]}

McLean, A. G. ^{[5
]}

Osborne, T. ^{[2
]}

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

Scotti, F. ^{[4
]}

Solomon, W. ^{[2
]}

机构：

[1] Oak Ridge Associated Univ, Oak Ridge, TN 37830 USA

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

[3] MIT, Boston, MI 02139 USA

[4] Princeton Plasma Phys Lab, Princeton, NJ 08540 USA

[5] Lawrence Livermore Natl Lab, Berkeley, CA 94720 USA

[6] Univ Calif San Diego, San Diego, CA 92093 USA

来源：

PHYSICS OF PLASMAS | 2020年 / 27卷 / 10期

关键词：

EDGE LOCALIZED MODES; IMPROVED CONFINEMENT; DISCHARGES; REGIME; POWER;

D O I：

10.1063/5.0011008

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：

Access to Super H-mode is demonstrated for moderately shaped plasmas in agreement with EPED [Snyder et al., Phys. Plasmas 16, 056118 (2009)] predictions. In particular, Super H-mode is realized in a DIII-D shape that is accessible to the JET tokamak. The reduced triangularity of the JET-compatible shape compared to previous Super H-mode plasma shapes does not prevent deep ascension into the so-called Super H-mode "channel." Operationally, access is enabled and optimized by delaying the neutral beam power injection and, thus, protracting the L-H transition. In highly shaped DIII-D plasmas, the injection of nitrogen sufficient for the establishment of a radiative divertor is shown to be possible during Super H-mode without pedestal degradation. Due to its increased stored energy and radiative divertor integration capabilities, Super H-mode is a promising candidate as operating regime for JET, ITER, and future fusion reactors.

引用

页数：15

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