Optical cavity alignment and mirror damage in the LELA FEL experiment
Abstract
The alignment of the LELA optical cavity, 17.5 m long, is described. The procedure to attain a close alignment of the undulator radiation axis and the cavity axis using an external laser is reported. Measurements of Q from stored light spectra are presented. Mirror degradation at increasing integrated electron currents is considered.
- Publication:
-
Nuclear Instruments and Methods in Physics Research A
- Pub Date:
- September 1987
- DOI:
- 10.1016/0168-9002(87)90434-7
- Bibcode:
- 1987NIMPA.259...88P