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Fiber laser cleaning of metal mirror surfaces for optical diagnostic systems of the ITER |
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| Authors: | A P Kuznetsov A S Alexandrova O I Buzhinsky K L Gubskiy T V Kazieva A V Savchenkov S N Tugarinov |
| Institution: | 1. National Research Nuclear University MEPhI, Kashirskoe sh. 31, Moscow, 115409, Russia 2. State Research Center of the Russian Federation Troitsk Institute for Innovation and Fusion Research, ul. Puskhovykh, vlad. 12, Troitsk, Moscow, 142092, Russia |
| Abstract: | 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 107 W/cm2. 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. |
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