[OPTICAL REVIEW Vol. 5, No. 3 (1998) 196-199]

Beam Profile Monitoring of Synchrotron Radiation by Adaptive Optics

Masahide ITOH,1 Naoya TAKEUCHI,1 Toshiyuki MITSUHASHI2 and Toyohiko YATAGAI1

1Institute of Applied Physics, University of Tsukuba, Ten-noh-dai, Tsukuba, Ibaraki, 305-8573 Japan, 2Institute of Material Structure Science, High Energy Accelerator Research Organization, Oho, Tsukuba, Ibaraki, 305-0810 Japan

(Received November 18, 1997; Accepted March 24, 1998)

A beam profile monitoring system for synchrotron radiation, designed to evaluate the distribution of a cross section of the electron beam in a high-energy accelerator storage ring in real-time is descripted. The Shack-Hartmann wavefront sensor is adopted for the measurement of the wavefront error caused by deformation of an extraction beryllium mirror for the visible synchrotron radiation. The correction of the measured wavefront distortion is also described.

Key words : adaptive optics, circular accelerator, synchrotron radiation, Shack-Hartmann sensor, optical diagnostics, deformable mirror