抄録
A compact photon absorber for the accelerator diagnosis beamline #2 of the SPring-8 storage ring, which withstands high heat load of the synchrotron radiation from a multi-pole wiggler, has been developed. In order to make the absorber compact, two absorber blocks made of GlidCop with a different tilt angle of surface have been arranged in tandem in the vacuum chamber. The front absorber intercepts upper and lower parts of the synchrotron radiation, and the rear one absorbs central part of the synchrotron radiation. Wirecoils made of copper have been inserted in the water-cooling channels of each absorber block to increase the heat transfer coefficient. The result of thermal and stress analysis with the ABAQUS code shows that the absorber has the fatigue strength of more than 5000 times at the maximum heat load of the synchrotron radiation from the wiggler.
