|Title||Removal of beryllium-containing films deposited in JET from mirror surfaces by laser cleaning|
|Publication Type||Journal Article|
|Year of Publication||2011|
|Authors||A. Widdowson, J.P Coad, G. De Temmerman, D. Farcage, D. Hole, D. Ivanova, A. Leontyev, M. Rubel, A. Semerok, A. Schmidt, P.Y Thro|
|Journal||Journal of Nuclear Materials|
|Type of Article||Article; Proceedings Paper|
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. (C) 2010 EURATOM. Published by Elsevier B.V. All rights reserved.
|Alternate Title||J. Nucl. Mater.|
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