Simulating the role of intrinsic carbon impurities in the divertor detachment of ASDEX Upgrade

被引：15

作者：

Wischmeier, M. ^{[1
]}

Bonnin, X. ^{[2
]}

Coster, D. P. ^{[1
]}

Chankin, A. V. ^{[1
]}

Kallenbach, A. ^{[1
]}

Mueller, H. W. ^{[1
]}

机构：

[1] EURATOM, Max Planck Inst Plasmaphys, D-85748 Garching, Germany

[2] Univ Paris 13, LIMHP, CNRS UPR 1311, F-93430 Villetaneuse, France

来源：

CONTRIBUTIONS TO PLASMA PHYSICS | 2008年 / 48卷 / 1-3期

关键词：

SOLPS5.0; detachment; ASDEX Upgrade; carbon; drifts;

D O I：

10.1002/ctpp.200810043

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：

As part of a general effort in validating SOL fluid Monte Carlo codes, well diagnosed ohmic discharges have been done in ASDEX Upgrade reaching from the lowest accessible density up to densities at which both targets were at least partially detached. The numerical code B2.5-EIRENE has been used to simulate these experiments with a particular focus on detachment. Whilst it is possible to qualitatively reproduce the general experimental observations when transiting from attached to detached plasmas, the simulations do not reproduce the detachment threshold observed in experiment quantitatively. The strong asymmetry of the ion flux density between the inner and the outer target with increasing density and in particular the vanishing ion flux, defined as full detachment, at the inner target cannot be reproduced. The influence of various parameters such as chemical sputtering yields and the effect of the activation of drift terms on the results is analyzed. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：249 / 254

页数：6

共 25 条

[1]

ALLAIS F, 2002, 29 EPS C CONTR FUS P, V26

[2] Kinetic effects in tokamak scrape-off layer plasmas [J].

Batishchev, OV ;

Krasheninnikov, SI ;

Catto, PJ ;

Batishcheva, AA ;

Sigmar, DJ ;

Xu, XQ ;

Byers, JA ;

Rognlien, TD ;

Cohen, RH ;

Shoucri, MM ;

Shkarofskii, IP .

PHYSICS OF PLASMAS, 1997, 4 (05) :1672-1680

[3] Geometry effects in the sol and divertor [J].

Borrass, K .

CZECHOSLOVAK JOURNAL OF PHYSICS, 1998, 48 :113-126

[4] Determination of photon efficiencies and hydrocarbon influxes in the detached outer divertor plasma of ASDEX Upgrade [J].

Brezinsek, S. ;

Pugno, R. ;

Fantz, U. ;

Manhard, A. ;

Mueller, H. W. ;

Kallenbach, A. ;

Mertens, Ph .

PHYSICA SCRIPTA, 2007, T128 :40-44

[5] Discrepancy between modelled and measured radial electric fields in the scrape-off layer of divertor tokamaks:: a challenge for 2D fluid codes? [J].

Chankin, A. V. ;

Coster, D. P. ;

Asakura, N. ;

Bonnin, X. ;

Conway, G. D. ;

Corrigan, G. ;

ErentS, S. K. ;

Fundamenski, W. ;

Horacek, J. ;

Kallenbach, A. ;

Kaufmann, M. ;

Konz, C. ;

Lackner, K. ;

Mueller, H. W. ;

Neuhauser, J. ;

Pitts, R. A. ;

Wischmeier, M. .

NUCLEAR FUSION, 2007, 47 (05) :479-489

[6] SOLPS modelling of ASDEX upgrade H-mode plasma [J].

Chankin, A. V. ;

Coster, D. P. ;

Dux, R. ;

Fuchs, Ch ;

Haas, G. ;

Herrmann, A. ;

D Horton, L. ;

Kallenbach, A. ;

Kaufmann, M. ;

Konz, Ch ;

Lackner, K. ;

Maggi, C. ;

Mueller, H. W. ;

Neuhauser, J. ;

Pugno, R. ;

Reich, M. ;

Schneider, W. .

PLASMA PHYSICS AND CONTROLLED FUSION, 2006, 48 (06) :839-868

[7]

CHODURA R, 1984, PHYSICS PLASMA WALL, P99

[8]

Coster D P, 2004, P 20 IAEA FUS EN C V

[9] Hydrogen molecules in the divertor of ASDEX Upgrade [J].

Fantz, U ;

Reiter, D ;

Heger, B ;

Coster, D .

JOURNAL OF NUCLEAR MATERIALS, 2001, 290 (290-293) :367-373

[10] Reversal of in-out asymmetry of the particle-recycling associated with X-point MARFE and plasma detachment [J].

Hatayama, A ;

Segawa, H ;

Komatsu, N ;

Schneider, R ;

Coster, DP ;

Hayashi, N ;

Sakurai, S ;

Asakura, N .

JOURNAL OF NUCLEAR MATERIALS, 2001, 290 :407-412

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