skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Three-energy focusing Laue monochromator for the diamond light source x-ray pair distribution function beamline I15-1

Abstract

The I15-1 beamline, the new side station to I15 at the Diamond Light Source, will be dedicated to the collection of atomic pair distribution function data. A Laue monochromator will be used consisting of three silicon crystals diffracting X-rays at a common Bragg angle of 2.83°. The crystals use the (1 1 1), (2 2 0), and (3 1 1) planes to select 40, 65, and 76 keV X-rays, respectively, and will be bent meridionally to horizontally focus the selected X-rays onto the sample. All crystals will be cut to the same optimized asymmetry angle in order to eliminate image broadening from the crystal thickness. Finite element calculations show that the thermal distortion of the crystals will affect the image size and bandpass.

Authors:
; ; ; ;  [1];  [1];  [2]
  1. Diamond Light Source Ltd, Harwell Science and Innovation Campus, Chilton, Didcot, Oxfordshire OX11 0DE (United Kingdom)
  2. (United Kingdom)
Publication Date:
OSTI Identifier:
22608390
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1741; Journal Issue: 1; Conference: SRI2015: 12. international conference on synchrotron radiation instrumentation, New York, NY (United States), 6-10 Jul 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ASYMMETRY; BRAGG REFLECTION; CRYSTALS; DIAMONDS; DISTRIBUTION; DISTRIBUTION FUNCTIONS; FINITE ELEMENT METHOD; FOCUSING; IMAGES; KEV RANGE 10-100; MONOCHROMATORS; SILICON; THICKNESS; X RADIATION

Citation Formats

Sutter, John P., E-mail: john.sutter@diamond.ac.uk, Chater, Philip A., Hillman, Michael R., Keeble, Dean S., Wilhelm, Heribert, Tucker, Matt G., and ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxfordshire OX11 0QX. Three-energy focusing Laue monochromator for the diamond light source x-ray pair distribution function beamline I15-1. United States: N. p., 2016. Web. doi:10.1063/1.4952877.
Sutter, John P., E-mail: john.sutter@diamond.ac.uk, Chater, Philip A., Hillman, Michael R., Keeble, Dean S., Wilhelm, Heribert, Tucker, Matt G., & ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxfordshire OX11 0QX. Three-energy focusing Laue monochromator for the diamond light source x-ray pair distribution function beamline I15-1. United States. doi:10.1063/1.4952877.
Sutter, John P., E-mail: john.sutter@diamond.ac.uk, Chater, Philip A., Hillman, Michael R., Keeble, Dean S., Wilhelm, Heribert, Tucker, Matt G., and ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxfordshire OX11 0QX. 2016. "Three-energy focusing Laue monochromator for the diamond light source x-ray pair distribution function beamline I15-1". United States. doi:10.1063/1.4952877.
@article{osti_22608390,
title = {Three-energy focusing Laue monochromator for the diamond light source x-ray pair distribution function beamline I15-1},
author = {Sutter, John P., E-mail: john.sutter@diamond.ac.uk and Chater, Philip A. and Hillman, Michael R. and Keeble, Dean S. and Wilhelm, Heribert and Tucker, Matt G. and ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxfordshire OX11 0QX},
abstractNote = {The I15-1 beamline, the new side station to I15 at the Diamond Light Source, will be dedicated to the collection of atomic pair distribution function data. A Laue monochromator will be used consisting of three silicon crystals diffracting X-rays at a common Bragg angle of 2.83°. The crystals use the (1 1 1), (2 2 0), and (3 1 1) planes to select 40, 65, and 76 keV X-rays, respectively, and will be bent meridionally to horizontally focus the selected X-rays onto the sample. All crystals will be cut to the same optimized asymmetry angle in order to eliminate image broadening from the crystal thickness. Finite element calculations show that the thermal distortion of the crystals will affect the image size and bandpass.},
doi = {10.1063/1.4952877},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1741,
place = {United States},
year = 2016,
month = 7
}
  • We have developed a sagittally bent Laue monochromator that is optimised for diffraction experiments on samples in diamond anvil cells. Test measurements have shown that the bandwidth of the monochromatic beam can be broadened with simultaneous focusing of the X-rays. A gain in X-ray flux of over 100 is achieved.
  • A comprehensive optical design for a high-resolution, high-flux, wide-energy range, micro-focused beamline working in the vacuum ultraviolet and soft x-ray photon energy range is proposed. The beamline is to provide monochromatic radiation to three photoelectron microscopes: a full-field x-ray photoelectron emission microscope and two scanning instruments, one dedicated to angle resolved photoemission spectroscopy ({mu}-ARPES) and one for ambient pressure x-ray photoelectron spectroscopy and scanning photoelectron microscopy (AP-XPS/SPEM). Microfocusing is achieved with state of the art elliptical cylinders, obtaining a spot size of 1 {mu}m for ARPES and 0.5 {mu}m for AP-XPS/SPEM. A detailed ray tracing analysis quantitatively evaluates the overallmore » beamline performances.« less
  • A comprehensive optical design for a high-resolution, high-flux, wide-energy range, micro-focused beamline working in the vacuum ultraviolet and soft x-ray photon energy range is proposed. The beamline is to provide monochromatic radiation to three photoelectron microscopes: a full-field x-ray photoelectron emission microscope and two scanning instruments, one dedicated to angle resolved photoemission spectroscopy ({micro}-ARPES) and one for ambient pressure x-ray photoelectron spectroscopy and scanning photoelectron microscopy (AP-XPS/SPEM). Microfocusing is achieved with state of the art elliptical cylinders, obtaining a spot size of 1 {micro}m for ARPES and 0.5 {micro}m for AP-XPS/SPEM. A detailed ray tracing analysis quantitatively evaluates the overallmore » beamline performances.« less
  • We report development of micro-focusing optics for high-energy x-rays by combining a sagittally bent Laue crystal monchromator with Kirkpatrick-Baez (K–B) X-ray focusing mirrors. The optical system is able to provide a clean, high-flux X-ray beam suitable for pair distribution function (PDF) measurements at high pressure using a diamond anvil cell (DAC). A focused beam of moderate size (10–15 μm) has been achieved at energies of 66 and 81keV. PDF data for nanocrystalline platinum (n-Pt) were collected at 12.5 GPa with a single 5 s X-ray exposure, showing that the in-situ compression, decompression, and relaxation behavior of samples in the DACmore » can be investigated with this technique. PDFs of n-Pt and nano Au (n-Au) under quasi-hydrostatic loading to as high as 71GPa indicate the existence of substantial reduction of grain or domain size for Pt and Au nanoparticles at pressures below 10 GPa. In conclusion, the coupling of sagittally bent Laue crystals with K–B mirrors provides a useful means to focus high-energy synchrotron X-rays from a bending magnet or wiggler source.« less