The effect of field reversal on the JET MkIIGB-SRP divertor performance in L-mode density limit discharges

被引:21
作者
Huber, A
Rapp, J
Andrew, P
Coad, P
Corrigan, G
Erents, K
Fundamenski, W
Ingesson, LC
Jachmich, S
Korotkov, A
Matthews, GF
Mertens, P
Philipps, V
Pitts, R
Schweer, B
Sergienko, G
Stamp, M
机构
[1] EURATOM, Forschungszentrum Julich GmbH, Inst Plasma Phys, Trilateral Euregio Cluster, D-52425 Julich, Germany
[2] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England
[3] FOM, Inst Plasmafys, Nieuwegein, Netherlands
[4] Ecole Polytech Fed Lausanne, Assoc Euratom Confederat Suisse, Ctr Rech Phys Plasmas, CH-1007 Lausanne, Switzerland
关键词
divertor asymmetry; density limit; divertor radiation; detachment; bolometer tomography;
D O I
10.1016/j.jnucmat.2004.10.123
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The effect of field reversal on the JET MkIIGB-SRP divertor performance has been investigated in L-mode density limit discharges. These experiments show that the direction of the magnetic field has a substantial effect on divertor physics, modifying the character of detachment and density limits. Reversal of the ion del B-drift direction away from the X-point results in a reduction of the density limit of about 15%. In contrast to forward field direction, the divertor parameters such as density and temperature as well as divertor radiation distribution and power at the divertor target become more symmetrical in the discharges with reversed field. The influence of different field configurations on the divertor performance has been analysed with respect to the dependence on density and heating power. The experimental observations of out-in asymmetry in target power as well as in the CIII-emission distribution is consistent with EDGE2D simulations, which include the effect of drifts. (c) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:241 / 245
页数:5
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