Study on the UV FEL single-shot damage threshold of an Au thin film.

J Synchrotron Radiat

State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China.

Published: September 2024

AI Article Synopsis

  • The study evaluates the damage threshold of an Au-coated flat mirror used in the FEL-2 beamline of the Dalian Coherent Light Source when exposed to far-UV free-electron laser irradiation.
  • The surface of the mirror's coating is analyzed using profilometers and optical microscopes to assess any damage.
  • A theoretical framework is developed using traditional damage threshold calculations, a one-dimensional thermal diffusion model, and finite-element analysis with ANSYS to understand the damage mechanisms.

Article 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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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11371058PMC
http://dx.doi.org/10.1107/S1600577524005332DOI Listing

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