Multiple pulse thermal damage thresholds of materials for x-ray free electron laser optics investigated with an ultraviolet laser
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94539 (United States)
- Kovio, Inc., 1145 Sonora Court, Sunnyvale, California 94086 (United States)
Optical elements to be used for x-ray free electron lasers (XFELs) must withstand multiple high-fluence pulses. We have used an ultraviolet laser to study the damage of two candidate materials, crystalline Si and B{sub 4}C-coated Si, emulating the temperature profile expected to occur in optics exposed to XFEL pulses. We found that the damage threshold for 10{sup 5} pulses is {approx}20% to 70% lower than the melting threshold.
- OSTI ID:
- 21175757
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 20 Vol. 93; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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