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Title: Radiation attenuation by single-crystal diamond windows

Journal Article · · Journal of Applied Crystallography (Online)
 [1];  [2];  [2];  [3];  [3];  [2];  [4];  [3]
  1. European Spallation Source, Lund (Sweden)
  2. Univ. of Edinburgh, Edinburgh (United Kingdom)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Carnegie Institution of Washington, D.C. (United States)
+ Show Author Affiliations

As artificial diamond becomes more cost effective it is likely to see increasing use as a window for sample environment equipment used in diffraction experiments. Such windows are particularly useful as they exhibit exceptional mechanical properties in addition to being highly transparent to both X-ray and neutron radiation. A key application is in high-pressure studies, where diamond anvil cells (DACs) are used to access extreme sample conditions. However, despite their utility, an important consideration when using single-crystal diamond windows is their interaction with the incident beam. In particular, the Bragg condition will be satisfied for specific angles and wavelengths, leading to the appearance of diamond Bragg spots on the diffraction detectors but also, unavoidably, to loss of transmitted intensity of the beam that interacts with the sample. This effect can be particularly significant for energy-dispersive measurements, for example, in time-of-flight neutron diffraction work using DACs. Furthermore, this article presents a semi-empirical approach that can be used to correct for this effect, which is a prerequisite for the accurate determination of diffraction intensities.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source; Energy Frontier Research Centers (EFRC) (United States). Energy Frontier Research in Extreme Environments (EFree)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC05-00OR22725; SC0001057
OSTI ID:
1361378
Journal Information:
Journal of Applied Crystallography (Online), Journal Name: Journal of Applied Crystallography (Online) Journal Issue: 1 Vol. 50; ISSN 1600-5767; ISSN JACGAR
Publisher:
International Union of CrystallographyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

Next-generation diamond cell and applications to single-crystal neutron diffraction journal September 2018
A suite-level review of the neutron powder diffraction instruments at Oak Ridge National Laboratory journal September 2018
Development of a technique for high pressure neutron diffraction at 40 GPa with a Paris-Edinburgh press journal June 2019
Structure and disorder in ice VII on the approach to hydrogen-bond symmetrization journal May 2019
Investigation of `glitches' in the energy spectrum induced by single-crystal diamond compound X-ray refractive lenses journal January 2019

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