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Study on the UV FEL single-shot damage threshold of an Au thin film
Meiyi Wu1, Qinming Li1, Mingchang Wang2
1Institute of Advanced Science Facilities, Shenzhen 518107, People's Republic of China.
Abstract:
The damage threshold of an Au-coated flat mirror, one of the reflective optics installed on the FEL-2 beamline of the Dalian Coherent Light Source, China, upon far-UV free-electron laser irradiation is evaluated. The surface of the coating is characterized by profilometer and optical microscope. A theoretical approach of the phenomenon is also presented, by application of conventional single-pulse damage threshold calculations, a one-dimensional thermal diffusion model, as well as finite-element analysis with ANSYS.
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