Cryogenic high-heat-load optics at the advanced photon source (Invited)

摘要: Cryogenically cooled silicon monochromators have found wide application at the Advanced Photon Source (APS) and other third-generation synchrotron radiation facilities. Currently, 17 insertion device beamlines APS are implementing cryogenic, double-crystal (DCM) as first optical element. Recently, several crystal internally with liquid nitrogen been tested on sector 1-ID undulator beamline APS. Rocking curves various energies were measured simultaneously in third order from a Si(111) DCM Bragg reflection geometry fixed gap of 11.1 mm. The exhibited sub-arc second thermal broadening rocking curve over energy range 6.0 to 17.0 keV up maximum incident power 561 W 2.5 V×2.0 H mm2 beam. It has demonstrated that cryogenic can handle highest beams hard x-ray undulators without significant thermo-mech...