Near- and far scrape-off layer transport studies in detached, small-ELM ASDEX Upgrade discharges by means of EMC3-EIRENE

被引：11

作者：

Lunt, T. ^{[1
]}

Frerichs, H. ^{[2
]}

Bernert, M. ^{[1
]}

Brida, D. ^{[1
]}

Carralero, D. ^{[3
]}

Cavedon, M. ^{[1
]}

David, P. ^{[1
]}

Drenik, A. ^{[1
]}

Faitsch, M. ^{[1
]}

Feng, Y. ^{[5
]}

Griener, M. ^{[1
]}

Herrmann, A. ^{[1
]}

Kurzan, B. ^{[1
]}

Pan, O. ^{[1
,4
]}

Plank, U. ^{[1
]}

Silvagni, D. ^{[1
,4
]}

Willensdorfer, M. ^{[1
]}

Wischmeier, M. ^{[1
]}

Wolfrum, E. ^{[1
]}

机构：

[1] Max Planck Inst Plasma Phys, Boltzmannstr 2, D-85748 Garching, Germany

[2] Univ Wisconsin, 1500 Engn Dr, Madison, WI 53706 USA

[3] CIEMAT, Av Complutense 40, Madrid 28040, Spain

[4] Tech Univ Munich, Phys Dept E28, James Franck Str 1, D-85748 Garching, Germany

[5] Max Planck Inst Plasma Phys, Wendelsteinstr 1, D-17491 Greifswald, Germany

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2020年 / 62卷 / 10期

关键词：

power exhaust; detachment; ASDEX Upgrade; EMC3-EIRENE; Tokamak; UPPER DIVERTOR; PLASMA; EQUILIBRIUM; EQUATION; FLUX; SOL; 3D;

D O I：

10.1088/1361-6587/aba9ff

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：

We compare various diagnostics characterizing an ASDEX Upgrade upper single-null discharge to EMC3-EIRENE simulations now including volumetric recombination and main chamber plasma-wall interaction but not yet drifts. The discharge is in a small-ELM regime and is approaching detachment due to a density ramp and nitrogen seeding. Time/ELM averaged upstream density, electron and ion temperature measurements as well as downstream ion saturation current, electron temperature and power flux measurements match the simulation within the error bars before and after reaching detachment, qualifying the code for this regime. Although the Ion Cyclotron Resonance Heating (ICRH) antenna limiters are 35 mm away from the separatrix, i.e. ten times the typical near-SOL power fall-off length lambda(near)(q) = 3.8 mm, they receive power fluxes of several hundreds of kW exceeding the ones to the outer target in the detached phase and strongly contribute to the particle fueling. This is explained by a substantially larger far-SOL power fall-off length lambda(far)(q) = 25 mm possibly caused by the small ELMs in the detached phase and the occurrence of a density shoulder.

引用

页数：15

共 2 条

[1] Inter-ELM Ion Transport in the ASDEX Upgrade Far Scrape-Off Layer
Kocan, M.
Allan, S. Y.
Carpentier-Chouchana, S.
de Marne, P.
Elmore, S.
Gunn, J. P.
Herrmann, A.
Kirk, A.
Kubic, M.
Lunt, T.
Mueller, H. W.
Pitts, R. A.
Rohde, V.
CONTRIBUTIONS TO PLASMA PHYSICS, 2013, 53 (01) : 22 - 26
[2] Radial transport in the far scrape-off layer of ASDEX Upgrade during L-mode and ELMy H-mode
Ionita, C.
Naulin, V.
Mehlmann, F.
Rasmussen, J. J.
Mueller, H. W.
Schrittwieser, R.
Rohde, V.
Nielsen, A. H.
Maszl, Ch.
Balan, P.
Herrmann, A.
NUCLEAR FUSION, 2013, 53 (04)

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