title: Focusing monochromator and imaging-plate camera for grazing-incidence diffraction studies of thin films.
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 al. [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.
authors.affiliation: Australian Nuclear Science and Technology Organization, PMB 1, Menai, NSW 2234, Australia.
authors.forename: G J
authors.initials: GJ
authors.lastname: Foran
authors.forename: R F
authors.initials: RF
authors.lastname: Garrett
authors.forename: I R
authors.initials: IR
authors.lastname: Gentle
authors.forename: D C
authors.initials: DC
authors.lastname: Creagh
authors.forename: J B
authors.initials: JB
authors.lastname: Peng
authors.forename: G T
authors.initials: GT
authors.lastname: Barnes