skip to main content

Title: Fiber laser cleaning of metal mirror surfaces for optical diagnostic systems of the ITER

The results of experimental studies into efficiency of removal of films with a complex composition from metal mirrors by pulsed fiber laser irradiation are presented. It is shown that the initial reflectivity of optical elements can be restored by the selection of modes of irradiation impacting the surface with the sputtered film. Effective cleaning is performed by radiation with a power density lower than 10{sup 7} W/cm{sup 2}. The removal of contaminations at such a relatively low power density occurs in a solid phase, owing to which the thermal effect on the mirror is insignificant.
Authors:
;  [1] ;  [2] ; ; ;  [1] ;  [2]
  1. National Research Nuclear University MEPhI (Russian Federation)
  2. State Research Center of the Russian Federation Troitsk Institute for Innovation and Fusion Research (Russian Federation)
Publication Date:
OSTI Identifier:
22471969
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Atomic Nuclei; Journal Volume: 78; Journal Issue: 10; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CLEANING; FIBERS; IRRADIATION; ITER TOKAMAK; LASER RADIATION; LASERS; METALS; MIRRORS; PLASMA DIAGNOSTICS; PULSED IRRADIATION; REFLECTIVITY; SPUTTERING; SURFACES