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Laser-assisted cleaning of beryllium-containing mirror samples from JET and PISCES-B
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics. KTH, School of Electrical Engineering (EES), Centres, Alfvén Laboratory Centre for Space and Fusion Plasma Physics.ORCID iD: 0000-0001-9901-6296
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2014 (English)In: Fusion engineering and design, ISSN 0920-3796, E-ISSN 1873-7196, Vol. 89, no 2, 122-130 p.Article in journal (Refereed) Published
Abstract [en]

A set of seven polycrystalline mirror samples retrieved from the JET tokamak has been cleaned in vacuum using a pulsed laser system. The surfaces of samples exposed to plasma during 2008-2009 campaigns as part of the second phase of a comprehensive first mirror test contained a mixture of carbon, beryllium and tritium. For this reason, the samples were treated in a vacuum chamber constructed specially for this purpose. In some cases mirrors show an increase of the specular reflectivity after cleaning, though beryllium and carbon deposits were not fully removed. Additionally, three samples coated in PISCES-B with a 110-120 nm beryllium layer were subjected to laser cleaning tests as well.

Place, publisher, year, edition, pages
2014. Vol. 89, no 2, 122-130 p.
Keyword [en]
ITER, First mirrors, Laser cleaning, Beryllium
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-144965DOI: 10.1016/j.fusengdes.2014.01.042ISI: 000333791700008Scopus ID: 2-s2.0-84894652155OAI: oai:DiVA.org:kth-144965DiVA: diva2:716128
Note

QC 20140508

Available from: 2014-05-08 Created: 2014-05-05 Last updated: 2017-12-05Bibliographically approved

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Rubel, Marek

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