Improved radiation measurements on JET - First results from an upgraded bolometer system

被引：30

作者：

Huber, A.

McCormick, K.

Andrew, P.

de Baar, M. R.

Beaumont, P.

Dalley, S.

Fink, J.

Fuchs, J. C.

Fullard, K.

Fundamenski, W.

Ingesson, L. C.

Kirnev, G.

Lomas, P.

Mast, F.

Jachmich, S.

Matthews, G. F.

Mertens, Ph.

Meigs, A.

Philipps, V.

Rapp, J.

Saibene, G.

Sanders, S.

Sartori, R.

Stamp, M. F.

Zeidner, W.

机构：

[1] Forschungszentrum Julich, Inst Plasmaphys, EURATOM Assoc, D-52425 Julich, Germany

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

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

[4] Inst Plasmafys, FOM, Nieuwegein, Netherlands

[5] EFDA Close Support Unit Garching, D-85748 Garching, Germany

来源：

JOURNAL OF NUCLEAR MATERIALS | 2007年 / 363卷 / 365-370期

关键词：

bolometer tomography; density limit; divertor radiation; detachment; divertor asymmetry;

D O I：

10.1016/j.jnucmat.2007.01.124

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

To improve the quality of radiation measurements, two new bolometric cameras with horizontal and vertical views of the plasma cross-section have been installed on JET. These cameras provide measurements with significantly improved spatial resolution, allowing the divertor and main chamber radiation fractions to be clearly resolved. Analysis of radiation profiles under attached and detached divertor conditions as well during the formation of an X-point MARFE (XPM) close to an ohmic density limit are presented. The radiation power fraction gamma = P(rad)/P(heat) increases from 0.5 to 0.8 just before XPM onset. A large fraction of this radiation is located in the divertor (p(rad)(div)/p(rad)(tot)= 0.56 at low density and about 0.67 at XPM onset). In addition, spatial distributions of radiation in recent ITER-like configuration discharges are presented. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：365 / 370

页数：6

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