Beam splitting mirror for advanced photon source sector 34

Benson, Curtis; Robinson, Ian
June 2000
AIP Conference Proceedings;2000, Vol. 521 Issue 1, p230
Academic Journal
The insertion device beamline at APS sector 34 is intended for tandem operation of two, high brilliance, experimental stations. Each station will require only a small fraction of the total cross-sectional area of the undulator beam, allowing both to operate simultaneously without compromise. A Coherent X-ray Diffraction (CXD) station will be supplied with pink beam from a horizontally reflecting, beam splitting mirror, while a Micro-Focus Diffraction (MFD) station will operate with white beam that passes beside the mirror. Use of a mirror as a beam splitter requires good thermal and mechanical stability from the mirror and its associated positioning system. The mirror substrate is liquid nitrogen cooled to minimize the thermal bump and increase its thermal conductivity. The principal motions of the mirror (2 translations, 2 rotations) are handled outside the chamber and passed into vacuum via two sets of bellows. © 2000 American Institute of Physics.


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