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.
[1]
I. Gentle,et al.
Phase transitions in Langmuir-Blodgett films of cadmium stearate: Grazing incidence X-ray diffraction studies
,
1997
.
[2]
I. Gentle,et al.
Grazing Incidence X-ray Diffraction Studies of Thin Films Using an Imaging Plate Detection System
,
1996
.
[3]
S. Wilkins,et al.
Powder diffraction using imaging plates at the Australian National Beamline Facility at the Photon Factory
,
1995
.
[4]
P. Eng,et al.
Construction and performance of a bent crystal x‐ray monochromator
,
1993
.
[5]
F. Dilmanian,et al.
A high‐energy double‐crystal fixed exit monochromator for the X17 superconducting wiggler beam line at the NSLS
,
1992
.
[6]
P. L. Cowan,et al.
X‐ray monochromator system for use with synchrotron radiation sources
,
1981
.