1. Electron beam halo monitor for a compact x-ray free-electron laser
- Author
-
Takashi Tanaka, Mitsuhiro Yamaga, Tsuyoshi Aoki, Hideki Aoyagi, Takuya Otake, T. Bizen, Shinsuke Suzuki, Kenji Fukami, Yoshihiro Asano, Toshiro Itoga, Nobuteru Nariyama, and Hideo Kitamura
- Subjects
Physics ,Nuclear and High Energy Physics ,Physics and Astronomy (miscellaneous) ,business.industry ,X-ray ,Free-electron laser ,Surfaces and Interfaces ,Optics ,Cathode ray ,Physics::Accelerator Physics ,lcsh:QC770-798 ,lcsh:Nuclear and particle physics. Atomic energy. Radioactivity ,Laser beam quality ,Halo ,business - Abstract
An electron beam halo monitor using diamond-based detectors, which are operated in the ionization mode, has been developed for the SPring-8 Angstrom compact free-electron laser (SACLA) to protect its undulator magnets from radiation damage. Diamond-based detectors are inserted in a beam duct to measure the intensity of the beam halo directly. To suppress the degradation of the electron beam due to the installation of the beam halo monitor, rf fingers with aluminum windows are newly employed. We evaluated the effect of radiation from the Al windows on the output signal both experimentally and by simulation. The operational results of the beam halo monitor employed in SACLA are presented. more...
- Published
- 2013