ISSN:
0323-7648
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
We report an application of the imaging plate, which contains phosphor crystals photostimulable by an X-ray beam, as a two-dimensional (2D) detector for time-resolved small-angle X-ray scattering (SAXS) and wide-angle X-ray diffraction (WAXD) studies especially designed for use with a rotating anode X-ray generator as an incident X-ray beam source. The detector constructed has the shape of an octahedral cylinder, and to each face is attached an imaging plate of 200 mm width and 100 mm height. Each plate consists of 800 × 1600 pixels with an area of 125 × 125 μm2/pixel. Time-resolved data acquisition of SAXS and WAXD patterns on the 2D detector is performed by changing the plate face with time either by a rotation of the drum or by shifting a face of the plate in the drum with respect to the incident beam. The detection (which consists of writing and reading) of scattered X-ray intensity distributions with the plates as well as erasure of the scattering patterns stored on the plates can be continuously performed by rotating the drum. The reading rate for the scattering patterns recorded onto the plate is 25 μs/pixel or 300 s/plate. The time required for changing the plate face from one to another by rotating the drum is 2 s, which corresponds to a minimum dead time for the time-resolved study with an effective area of 100 × 200 mm2. When necessary, especially to shorten the dead time for the measurements, each plate can be further divided into N sections by shifting the drum with respect to the incident beam, the time required for the shifting being 25 ms/mm. Thus when the plate of 200 × 100 mm2 is divided into sections of (200/N) × 100 mm2, the minimum dead time is reduced to 25 × (200/N) ms.
Additional Material:
14 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/actp.1995.010460610
