Wide-bandpass {open_quote}{open_quote}multilayer{close_quote}{close_quote} monochromator for small angle scattering/diffraction studies on biological systems

Journal Article · Sun Sep 01 04:00:00 EDT 1996 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1147394· OSTI ID:435001

Tsuruta, H; Tompkins, W; Hodgson, K ^[1]; Irving, T ^[2]; Chen, L ^[3]; Segel, D ^[4]

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1. SSRL/SLAC, Stanford University, P.O. Box 4349, MS 69, Stanford, CA 94309-0210 (United States)
2. BioCAT, Illinois Institute of Technology (United States)
3. Dept. Chemistry, Stanford University (United States)
4. Dept. Physics, Stanford University (United States)

We have utilized a {open_quote}{open_quote}multilayer{close_quote}{close_quote} monochromator (a pair of layered synthetic microstructures) in small-angle x-ray scattering/diffraction studies of biological materials. Many biological applications of the SAXS/D technique, in particular time-resolved studies, are often limited by the flux available to experiments. The wider energy bandpass of the multilayer monochromator provides a higher beam flux by a factor of 10 or more, compared with that of the Si(111) double-crystal monochromator. At the SSRL BL 4-2 SAXS/D facility, two types of multilayers have been used: Mo/C on Si substrate, fabricated at Lawrence Berkeley Laboratory [S. Brennan {ital et} {ital al}., Nucl. Instrum. Methods Phys. Res. A {bold 347}, 417 (1994)] and Mo/B4C on Si substrate, obtained from Osmic, Inc. The energy bandpass of the former multilayer is about 150 eV at 10 keV, and that of the latter is expected to be slightly wider. A pair of the latter multilayers gives 8 x 10{sup 11} photons/s in a beam size 1 x 2 mm{sup 2} (FWHM) at a photon beam energy of 9 keV and a SPEAR ring current of 85 mA. We will present excellent quality diffraction/scattering patterns from muscle fibers and protein solutions that show no significant smearing artifacts due to the wider energy bandpass. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 435001
• Report Number(s): CONF-9510119--
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 9 Vol. 67; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
BIOLOGICAL MATERIALS
MONOCHROMATORS
PROTEINS
SMALL ANGLE SCATTERING
SPEAR
USES
X-RAY DIFFRACTION
X-RAY EQUIPMENT