Removal of beryllium-containing films deposited in JET from mirror surfaces by laser cleaning
2011 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, ISSN 0022-3115, Vol. 415, no 1, S1199-S1202 p.Article in journal (Refereed) Published
A set of stainless steel (SS) and molybdenum mirror samples located in the divertor and at the outer mid-plane of the vessel were exposed in JET from 2005 to 2007. A selection of these mirror samples with well adhered deposits (i.e. not flaking) of up to a few hundred nanometers in thickness and with Be/C ratios ranging from 0 to similar to 1 have been cleaned using a laser system developed at CEA, Saclay. Following laser cleaning the recovered reflectivity was generally better in the infrared than the visible spectrum, with recovery of up to 90% of the initial reflectivity being obtained at 1600 nm for both Mo and SS mirrors falling as low as 20-30% of initial reflectivity at a wavelength of 400 nm for some SS mirrors, rising to similar to 80% for Mo mirrors. Some deposit remained on the mirrors after the cleaning trials.
Place, publisher, year, edition, pages
2011. Vol. 415, no 1, S1199-S1202 p.
Cleaning trials, Laser cleaning, Laser systems, Mirror surfaces, Visible spectra
Fusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:kth:diva-29587DOI: 10.1016/j.jnucmat.2010.11.076ISI: 000298128100273ScopusID: 2-s2.0-80054843301OAI: oai:DiVA.org:kth-29587DiVA: diva2:396338
19th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices (PSI), May 24-28, 2010,Univ Calif, Gen Atom, San Diego, CA
QC 201102092011-02-092011-02-092014-04-11Bibliographically approved