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Title: A laser-aided prealigned pinhole collimator for synchrotron x rays

Abstract

A pinhole small-angle x-ray scattering (SAXS) instrument was constructed at the SUNY X3A2 beamline, National Synchrotron Light Source, Brookhaven National Laboratory. The three pinholes were mounted in a thick-walled stainless steel pipe and {ital prealigned} by using a portable laser source and a charge-coupled device (CCD) area detector. After the prealignment, incorporation of the collimator to the synchrotron x-ray source required only maximization of the incident x-ray intensity passing through the pinholes, which could be done easily by using a scintillation counter after proper attenuation. The entire synchrotron SAXS instrument setup took only a few hours even without stepping motor control for the pinhole collimator unit. By combining this collimator with a CCD-based x-ray area detector which could be assembled by using commercially available components, the SAXS instrument showed good performance for structural scales up to an order of 100 nm. The CCD-based x-ray area detector used a computer- (or manually) controlled intensified unit with a variable gain setting in order to accommodate the changing x-ray flux and to protect the detector from over exposure, a necessary feature for operation of an area detector at a synchrotron light source.

Authors:
; ; ; ;  [1];  [2]
  1. Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400 (United States)
  2. Experimental Station, Fibers Department, E.I. DuPont de Nemours and Co., P.O. Box 80302, Wilmington, Delaware 19880-0302 (United States)
Publication Date:
OSTI Identifier:
142744
DOE Contract Number:  
FG02-86ER45237; FG05-89ER75515
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 65; Journal Issue: 3; Other Information: PBD: Mar 1994
Country of Publication:
United States
Language:
English
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; COLLIMATORS; FABRICATION; X-RAY SOURCES; NSLS; ALIGNMENT; SMALL ANGLE SCATTERING

Citation Formats

Chu, B., Harney, P.J., Li, Y., Linliu, K., Yeh, F., and Hsiao, B.S.. A laser-aided prealigned pinhole collimator for synchrotron x rays. United States: N. p., 1994. Web. doi:10.1063/1.1145123.
Chu, B., Harney, P.J., Li, Y., Linliu, K., Yeh, F., & Hsiao, B.S.. A laser-aided prealigned pinhole collimator for synchrotron x rays. United States. doi:10.1063/1.1145123.
Chu, B., Harney, P.J., Li, Y., Linliu, K., Yeh, F., and Hsiao, B.S.. Tue . "A laser-aided prealigned pinhole collimator for synchrotron x rays". United States. doi:10.1063/1.1145123.
@article{osti_142744,
title = {A laser-aided prealigned pinhole collimator for synchrotron x rays},
author = {Chu, B. and Harney, P.J. and Li, Y. and Linliu, K. and Yeh, F. and Hsiao, B.S.},
abstractNote = {A pinhole small-angle x-ray scattering (SAXS) instrument was constructed at the SUNY X3A2 beamline, National Synchrotron Light Source, Brookhaven National Laboratory. The three pinholes were mounted in a thick-walled stainless steel pipe and {ital prealigned} by using a portable laser source and a charge-coupled device (CCD) area detector. After the prealignment, incorporation of the collimator to the synchrotron x-ray source required only maximization of the incident x-ray intensity passing through the pinholes, which could be done easily by using a scintillation counter after proper attenuation. The entire synchrotron SAXS instrument setup took only a few hours even without stepping motor control for the pinhole collimator unit. By combining this collimator with a CCD-based x-ray area detector which could be assembled by using commercially available components, the SAXS instrument showed good performance for structural scales up to an order of 100 nm. The CCD-based x-ray area detector used a computer- (or manually) controlled intensified unit with a variable gain setting in order to accommodate the changing x-ray flux and to protect the detector from over exposure, a necessary feature for operation of an area detector at a synchrotron light source.},
doi = {10.1063/1.1145123},
journal = {Review of Scientific Instruments},
number = 3,
volume = 65,
place = {United States},
year = {1994},
month = {3}
}