A robust cryogenic crystal design in use at the APS

Ivanov, Ivan; Rosenbaum, Gerd; Chrzas, John; Fischetti, Robert; Segre, C. U.; Chapman, L. D.
June 2000
AIP Conference Proceedings;2000, Vol. 521 Issue 1, p271
Academic Journal
A simple and robust design for the liquid nitrogen-cooled first monochromator crystal suitable for large Bragg-angles has been implemented at three undulator beamlines at the Advanced Photon Source (IMCA CAT, BioCAT, and MR CAT). The design features a simple and reliable seal and a strain free mount. The system has been pressure tested intentionally and accidentally to failure and the crystal reseals. Measurements have been made under closed gap conditions with little indication of distortion. The crystal design, implementation and measurements are presented. © 2000 American Institute of Physics.


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