Several large-size mirrors coated with a thin layer of CVD-SiC for intense synchrotron radiation have been fabricated and commissioned at the Photon Factory. Substrates of these mirrors are high-purity graphite, recrystallized SiC and sintered SiC. Detailed properties of mirror-materials are described. First test of exposure of high-power mirrors to intense radiation from the 53-pole permanent-magnet wiggler are briefly reported.
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