Impact of the ITER-like wall on divertor detachment and on the density limit in the JET tokamak

被引：68

作者：

Huber, A. ^{[1
,2
]}

Brezinsek, S. ^{[1
,2
]}

Groth, M. ^{[1
,3
]}

de Vries, P. C. ^{[1
,3
]}

Riccardo, V. ^{[1
,3
]}

van Rooij, G. ^{[1
,4
]}

Sergienko, G. ^{[1
,2
]}

Arnoux, G. ^{[1
,3
]}

Boboc, A. ^{[1
,3
]}

Bilkova, P. ^{[1
,5
]}

Calabro, G. ^{[1
,6
]}

Clever, M. ^{[1
,2
]}

Coenen, J. W. ^{[1
,2
]}

Beurskens, M. N. A. ^{[1
,3
]}

Eich, T. ^{[1
,7
]}

Jachmich, S. ^{[1
,8
]}

Lehnen, M. ^{[1
,2
]}

Lerche, E. ^{[1
,3
]}

Marsen, S. ^{[1
,9
]}

Matthews, G. F. ^{[1
,3
]}

McCormick, K. ^{[1
,7
]}

Meigs, A. G. ^{[1
,3
]}

Mertens, Ph. ^{[1
,2
]}

Philipps, V. ^{[1
,2
]}

Rapp, J. ^{[10
]}

Samm, U. ^{[2
]}

Stamp, M. ^{[1
,3
]}

Wischmeier, M. ^{[1
,7
]}

Wiesen, S. ^{[1
,2
]}

机构：

[1] JET EFDA, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

[2] Assoc EURATOM FZJ, Forschungszentrum Julich, Inst Energy & Climate Res Plasma Phys, D-52425 Julich, Germany

[3] Euratom CCFE Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

[4] EURATOM, FOM Inst DIFFER, Nieuwegein, Netherlands

[5] Acad Sci Czech Republ, Inst Plasma Phys, Prague, Czech Republic

[6] ENEA, EURATOM Assoc, I-0044 Frascati, Italy

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

[8] Assoc Euratom Belgian State, Ecole Royale Mil, B-1000 Brussels, Belgium

[9] EURATOM, Max Planck Inst Plasmaphys, D-17491 Greifswald, Germany

[10] Oak Ridge Natl Lab, Oak Ridge, TN USA

来源：

JOURNAL OF NUCLEAR MATERIALS | 2013年 / 438卷

基金：

英国工程与自然科学研究理事会;

关键词：

ELMY H-MODES; RECOMBINATION; TRANSPORT; ENERGY;

D O I：

10.1016/j.jnucmat.2013.01.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

L-mode and H-mode density limits with the ITER-like wall (ILW) have been investigated in the recent experimental campaign and compared with experiments in the JET carbon material configuration. The density limit is up to 40% higher in the JET-ILW than in the JET-CFC machine. This is linked to the formerly higher radiation fraction and, correspondingly, to earlier divertor detachment in the JET-CFC. In the ILW configuration, the discharge demonstrates a stable operation with a completely detached outer divertor in L-and H-mode. In contrary to the well-known `` heating power independent'' Greenwald limit, the Lmode densities limit increases moderately with rising heating power (similar to P-heat(0.4)) independently of the wall material. The H-L transition constitutes an effective undisruptive density limit for an H-mode plasma. Detachment itself does not trigger the H-L back transition and does not present a limit on plasma density. In the range of neutral beam heating 8-10.5 MW, no dependence of the H-mode density limit on the heating power was observed. (C) 2013 Euratom. Published by Elsevier B. V. All rights reserved.

引用

页码：S139 / S147

页数：9

共 50 条

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