SOLPS-ITER modeling of boosted carbon radiation through non-coronal effects in an X-divertor facilitating detachment in DIII-D

被引：7

作者：

Chen, Zhong-Ping ^{[1
]}

Kotschenreuther, Mike ^{[1
]}

Mahajan, Swadesh ^{[1
]}

Roeltgen, Jonathan ^{[1
]}

机构：

[1] Univ Texas Austin, Inst Fus Studies, Austin, TX 78712 USA

来源：

NUCLEAR FUSION | 2020年 / 60卷 / 04期

关键词：

X-divertor; detachment; non-coronal effects;

D O I：

10.1088/1741-4326/ab71bc

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：

Through SOLPS-ITER simulations on DIII-D, we have demonstrated X-divertor (XD)'s abilities to boost carbon line radiation and hence to achieve similar detached conditions with just half the upstream density of the standard divertor (SD). Simulations suggest that the XD geometry vastly expands the carbon radiation volume near the target through the non-coronal effects that increase the carbon emissivity by an order of magnitude within T-e = 20 similar to 30 eV range. The underlying mechanisms include the parallel and perpendicular transport of carbon impurities and the charge exchange with deuterium neutrals. Simplified physics models supported by simulation data indicate that the ultra shallow field angle in the XD plays a critical role in these mechanisms.

引用

页数：7

共 24 条

[1] Presentation of the New SOLPS-ITER Code Package for Tokamak Plasma Edge Modelling [J].

Bonnin, Xavier ;

Dekeyser, Wouter ;

Pitts, Richard ;

Coster, David ;

Voskoboynikov, Serguey ;

Wiesen, Sven .

PLASMA AND FUSION RESEARCH, 2016, 11 :1-6

[2] THE BEHAVIOR OF IMPURITIES OUT OF CORONAL EQUILIBRIUM [J].

CAROLAN, PG ;

PIOTROWICZ, VA .

PLASMA PHYSICS AND CONTROLLED FUSION, 1983, 25 (10) :1065-1086

[3] A study of X-divertor in NSTX-U with SOLPS simulations [J].

Chen, Zhong-Ping ;

Kotschenreuther, Mike ;

Mahajan, Swadesh ;

Gerhardt, Stefan .

NUCLEAR FUSION, 2018, 58 (03)

[4] Increased heat dissipation with the X-divertor geometry facilitating detachment onset at lower density in DIII-D [J].

Covele, B. ;

Kotschenreuther, M. ;

Mahajan, S. ;

Valanju, P. ;

Leonard, A. ;

Watkins, J. ;

Makowski, M. ;

Fenstermacher, M. ;

Si, H. .

NUCLEAR FUSION, 2017, 57 (08)

[5] An exploration of advanced X-divertor scenarios on ITER [J].

Covele, B. ;

Valanju, P. ;

Kotschenreuther, M. ;

Mahajan, S. .

NUCLEAR FUSION, 2014, 54 (07)

[6]

Crotinger J A, 1997, LLNL report UCRL-ID-126284

[7] Scaling of the tokamak near the scrape-off layer H-mode power width and implications for ITER [J].

Eich, T. ;

Leonard, A. W. ;

Pitts, R. A. ;

Fundamenski, W. ;

Goldston, R. J. ;

Gray, T. K. ;

Herrmann, A. ;

Kirk, A. ;

Kallenbach, A. ;

Kardaun, O. ;

Kukushkin, A. S. ;

LaBombard, B. ;

Maingi, R. ;

Makowski, M. A. ;

Scarabosio, A. ;

Sieglin, B. ;

Terry, J. ;

Thornton, A. .

NUCLEAR FUSION, 2013, 53 (09)

[8] Small angle slot divertor concept for long pulse advanced tokamaks [J].

Guo, H. Y. ;

Sang, C. F. ;

Stangeby, P. C. ;

Lao, L. L. ;

Taylor, T. S. ;

Thomas, D. M. .

NUCLEAR FUSION, 2017, 57 (04)

[9] On heat loading, novel divertors, and fusion reactors [J].

Kotschenreuther, M. ;

Valanju, P. M. ;

Mahajan, S. M. ;

Wiley, J. C. .

PHYSICS OF PLASMAS, 2007, 14 (07)

[10]

Kotschenreuther M., 2007, B AM PHYS SOC, V53, P11

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