Kratky block-collimation small-angle x-ray diffractometer for synchrotron radiation

Journal Article · Wed Jul 01 04:00:00 EDT 1987 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1139591· OSTI ID:6554469

Chu, B; Wu, D; Wu, C

A block slit collimation system of the Kratky design concept has been modified and adapted for synchrotron radiation. The building block small-angle x-ray diffractometer (SAXD) not only retains the essential advantages of the Kratky camera, i.e., accessibility at small values of q( = (4..pi../lambda)sin(theta/2) with lambda and theta being the x-ray wavelength and the scattering angle, respectively) and ease of alignment, but also provides portability and low construction cost. With our SAXD operating at the SUNY X21A beamline of the National Synchrotron Light Source, we were able to reach theta--1 mrad corresponding to q--0.04 nm/sup -1/ (or a Bragg spacing of 150 nm) using an incident slit width (d) of 0.5 mm and lambda = 0.15 nm. At d = 0.5 mm, --10% of the monochromatic synchrotron x-ray radiation passed through the block collimation system and a parasitic intensity to main beam intensity ratio of --10/sup -5/ at theta = 1 mrad was achieved. With d--0.1 mm, it is anticipated that q --0.01 nm/sup -1/ can be accessible. By changing the vacuum tube length between the sample chamber and the beam stop from --1400 to --200 mm, we could reach an intermediate q range of --0.04approx.

• Research Organization: Chemistry Department, State University of New York at Stony Brook, Stony Brook, New York 11794-3400
• OSTI ID: 6554469
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 58:7; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACCELERATORS
BNL
BREMSSTRAHLUNG
CALIBRATION
COHERENT SCATTERING
COLLIMATORS
CYCLIC ACCELERATORS
DESIGN
DIFFRACTION
DIFFRACTOMETERS
ELECTROMAGNETIC RADIATION
MEASURING INSTRUMENTS
NATIONAL ORGANIZATIONS
NSLS
OPERATION
POSITION SENSITIVE DETECTORS
RADIATION DETECTORS
RADIATION SOURCES
RADIATIONS
SCATTERING
SMALL ANGLE SCATTERING
SYNCHROTRON RADIATION
SYNCHROTRON RADIATION SOURCES
SYNCHROTRONS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
X-RAY DIFFRACTION
X-RAY DIFFRACTOMETERS