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Focusing monochromator and imaging-plate camera for grazing-incidence diffraction studies of thin films

By Garry J. Foran, Richard F. Garrett, Ian R. Gentle, Dudley C. Creagh, Jian Bang Peng and Geoffrey T. Barnes

Abstract

A multiple-imaging-plate detector system and focusing monochromator have been developed and successfully applied to the time-resolved study of phase transitions in Langmuir-Blodgett films by grazing-incidence X-ray diffraction (GIXD). The monochromator described here combines fixed-exit-beam height with sagittal focusing of the second crystal. The design is similar to that of Matsushita et nl. [Matsushita, Ishikawa & Oyanagi (1986). Nucl. Instrum. Methods, A246, 377-379], with the exception that the motion of the first crystal is achieved via a computer-controlled X-Y translation table rather than a set of cams. The second crystal is a ribbed Si(111) wafer mounted in a four-point bending mechanism. The first reported application of imaging plates to a GIXD study was carried out by our group and proved to be very successful in the determination of thin-film structure [Foran, Peng, Steitz, Barnes & Gentle (1996). Langmuir, 12, 774-777]. To extend the capabilities of this system, an imaging-plate camera was designed and built which can accommodate up to 13 imaging plates (40 x 20 cm) inside the vacuum chamber of the main diffractometer at the Australian Beamline at the Photon Factory

Topics: imaging plates, grazing-incidence X-ray diffraction, Langmuir-Blodgett films, phase transitions, focusing monochromators, Wiggler Beam Line, Synchrotron Radiation, System, Nsls
Publisher: Wiley-Blackwell Publishing
Year: 1998
DOI identifier: 10.1107/S0909049597017287
OAI identifier: oai:espace.library.uq.edu.au:UQ:257242

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