Identification of molecular carbon sources in the JET divertor by means of emission spectroscopy

被引：28

作者：

Brezinsek, S

Pospieszczyk, A

Stamp, MF

Meigs, A

Kirschner, A

Huber, A

Mertens, P

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

来源：

JOURNAL OF NUCLEAR MATERIALS | 2005年 / 337卷 / 1-3期

关键词：

spectroscopy; JET; carbon impurities; erosion and deposition; divertor;

D O I：

10.1016/j.jnucmat.2004.10.114

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Strong light emission from the C-2 Swan band and the CD Gero band has been observed during strike-point sweeps in the corner region of the inner MKII SRP divertor of JET. The light emission could be correlated to the decomposition of probably soft hydrocarbon layers at the corner entrance. The C-2/CD photon-flux ratio indicates a preferred emission of C-2 and thus of C2Dy particles. The layer has been removed within one H-mode discharge, where the strike point was fixed at the corner. In the consecutive discharges no enhanced light emission from C-2 and CD could be observed and the C-2/CD photon-flux ratio drops significantly. The spectroscopic observations are in line with measurements on the quartz microbalance (QMB). A similar layer in the outer divertor could not be identified from the spectroscopy. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：1058 / 1063

页数：6

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