WG5001
JASRI/SPring-8, Hyogo, Japan
RIKEN SPring-8 Center, Sayo-cho, Sayo-gun, Hyogo, Japan
We propose a diamond-based beam halo monitor for an Energy Recovery Linac (ERL). Diamond detectors are operated in photoconductive mode, and installed in a beam duct to measure the intensity of the beam halo directly. Pulse-by-pulse measurement is adopted to suppress the background noise efficiently. The lower detection limit of 2·103 electrons/pulse for single-shot measurement has been achieved. This monitor had been originally developed for SPring-8 Angstrom Compact free electron LAser (SACLA) to prevent radiation damage of undulator magnets, and good performances have been provided until now. The diamond-based beam halo monitor should be useful to control the beam and avoid the unnecessary radiation damage of the components of ERL. Based on the feasibility tests and the operational results of this monitor at SACLA, we will discuss the possibility of the monitor to adapt to the ERL system.
