Aj. Allen et al., ULTRA-SMALL-ANGLE X-RAY-SCATTERING TO BRIDGE THE GAP BETWEEN VISIBLE-LIGHT SCATTERING AND STANDARD SMALL-ANGLE SCATTERING CAMERAS, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 347(1-3), 1994, pp. 487-490
This paper reports the performance of an ultra-small-angle X-ray scatt
ering facility on beamline X23A3 at the National Synchrotron Light Sou
rce. Based on a Bonse-Hart double-crystal design, the instrument combi
nes: continuously tunable optics with asymmetric first monochromator c
rystal, high-flux throughput, high-precision crystal rotators, indepen
dently-mounted reflecting crystals, photodiode detector and high-resol
ution X-ray video camera. This combination of features permits rapid s
mall-angle X-ray scattering measurements in the scattering wave-vector
range of 0.005-2.0 nm-1 (depending on the sample), with mum-positioni
ng accuracy of a typical 3 x 3 mm2 beam on the sample.