Thermal stresses in the reflective x-ray optics for the Linac Coherent Light Source
Abstract
Reflective optics for an intense x-ray beam generated by the planned Linac Coherent Light Source will have to accommodate very high fluence per pulse, at the repetition rate of 120 Hz. We analyze thermal stresses caused by the heating of a thin surface layer of the optics after every pulse. A conclusion is drawn that keeping this stress below the yield strength imposes stringent limitations on the fluence. Possible experiments for evaluating the number of pulses leading to a substantial degradation of the optics due to the thermal fatigue are briefly discussed.
- Publication:
-
Review of Scientific Instruments
- Pub Date:
- August 2003
- DOI:
- 10.1063/1.1590747
- Bibcode:
- 2003RScI...74.3722R
- Keywords:
-
- 46.50.+a;
- 07.85.Qe;
- 29.20.Lq;
- Fracture mechanics fatigue and cracks;
- Synchrotron radiation instrumentation;
- Synchrotrons