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An overview of a comprehensive First Mirror Test for ITER at JET
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.ORCID iD: 0000-0001-9901-6296
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
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2009 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 390-91, 1066-1069 p.Article in journal (Refereed) Published
Abstract [en]

The test was performed with 32 stainless steel and molybdenum mirrors placed in pan-pipe shaped cassettes and exposed in JET in the divertor and on the main chamber wall for 127000 s including 97000 s of X-point operation. Surface composition and total reflectivity were determined afterwards All mirrors. from the divertor were coated with deuterated carbon deposits causing the reflectivity loss by a factor of 6-10 in the visible range. Flaking and exfoliation of deposits were observed in some cases On the main. chamber wall the deposition occurred mainly on mirrors located deep in cassette channels whereas mirrors close to the channels entrances were free from deposits and retained fair reflectivity (similar to 90% of initial value) especially in the infra-red range. No significant differences in behaviour of steel and molybdenum were noted. The need for development of methods for mirror cleaning and/or protection in a reactor-class device is addressed.

Place, publisher, year, edition, pages
Amsterdam: ELSEVIER SCIENCE BV , 2009. Vol. 390-91, 1066-1069 p.
National Category
Fusion, Plasma and Space Physics
URN: urn:nbn:se:kth:diva-25583DOI: 10.1016/j.jnucmat.2009.01.257ISI: 000267747300246ScopusID: 2-s2.0-67349197126OAI: diva2:370534
18th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices Toledo, SPAIN, MAY 26-30, 2008
QC 20101117Available from: 2012-01-26 Created: 2010-10-27 Last updated: 2012-02-22Bibliographically approved

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