Density limit of H-mode plasmas on JET-ILW

被引：11

作者：

Huber, A. ^{[2
]}

Brezinsek, S. ^{[2
]}

Sergienko, G. ^{[2
]}

Groth, M. ^{[3
]}

de Vries, P. C. ^{[4
]}

Aho-Mantila, L. ^{[5
]}

Arnoux, G. ^{[6
]}

Bernert, M. ^{[7
]}

Beurskens, M. N. A. ^{[6
]}

Calabro, G. ^{[8
]}

Clever, M. ^{[2
]}

Esser, H. G. ^{[2
]}

Guillemaut, C. ^{[9
]}

Jachmich, S. ^{[10
]}

Jarvinen, A. ^{[3
]}

Linsmeier, Ch. ^{[2
]}

Matthews, G. F. ^{[6
]}

Meigs, A. G. ^{[6
]}

Mertens, Ph. ^{[2
]}

Philipps, V. ^{[2
]}

Stamp, M. ^{[6
]}

Wischmeier, M. ^{[7
]}

Wiesen, S. ^{[2
]}

机构：

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

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

[3] Aalto Univ, Espoo 02015, Finland

[4] ITER Org, F-13115 St Paul Les Durance, France

[5] VTT Tech Res Ctr Finland, Espoo 02044, Finland

[6] Culham Ctr Fus Energy, Abingdon OX14 3DB, Oxon, England

[7] Max Planck Inst Plasma Phys, D-85748 Garching, Germany

[8] ENEA, I-0044 Frascati, Italy

[9] CEA, IRFM, F-13108 St Paul Les Durance, France

[10] ERM KMS, Plasma Phys Lab, B-1000 Brussels, Belgium

来源：

JOURNAL OF NUCLEAR MATERIALS | 2015年 / 463卷

关键词：

ITER-LIKE WALL; DETACHMENT;

D O I：

10.1016/j.jnucmat.2014.11.055

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-density discharges on JET with ITER-like Wall (ILW) have been analysed with the aim of establishing a mechanism for the H-mode density limit (DL) and compared with experiments in the JET carbon material configuration. The density limit is up to 20% higher in the JET-ILW than in the JET-C machine. The observed H-mode density limit is found close to the Greenwald limit. It is sensitive to the main plasma shape and is almost independent of the heating power. It has been observed that the transition from H-mode to L-mode is not always an abrupt event but may exhibit a series of H-L-H transitions, the so-called "dithering H-mode". It was observed that detachment, as well as the X-point MARFE itself, does not trigger the H-L transition and thus does not present a limit on the plasma density and that it is the plasma confinement which is ultimately responsible for the H-mode DL (C) 2014 EURATOM. Published by Elsevier B.V. All rights reserved.

引用

页码：445 / 449

页数：5

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