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Crystals 2018, 8(8), 318; https://doi.org/10.3390/cryst8080318

Neutron RTOF Stress Diffractometer FSD at the IBR-2 Pulsed Reactor

Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Joliot-Curie Str. 6, 141980 Dubna, Russia
Received: 18 July 2018 / Revised: 4 August 2018 / Accepted: 6 August 2018 / Published: 9 August 2018
(This article belongs to the Special Issue Neutron Diffractometers for Single Crystals and Powders)
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Abstract

The diffraction of thermal neutrons is a powerful tool for investigations of residual stresses in various structural materials and bulk industrial products due to the non-destructive character of the method and high penetration depth of neutrons. Therefore, for conducting experiments in this research field, the neutron Fourier stress diffractometer FSD has been constructed at the IBR-2 pulsed reactor in FLNP JINR (Dubna, Russia). Using a special correlation technique at the long-pulse neutron source, a high resolution level of the instrument has been achieved (Δd/d ≈ 2 ÷ 4 × 10−3) over a wide range of interplanar spacing dhkl at a relatively short flight distance between the chopper and sample position (L = 5.55 m). The FSD design satisfies the requirements of a high luminosity, high resolution, and specific sample environment. In this paper, the current status of the FSD diffractometer is reported and examples of performed experiments are given. View Full-Text
Keywords: neutron diffraction; reverse time-of-flight (RTOF) method; residual stress; microstrain; crystallite size neutron diffraction; reverse time-of-flight (RTOF) method; residual stress; microstrain; crystallite size
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Bokuchava, G. Neutron RTOF Stress Diffractometer FSD at the IBR-2 Pulsed Reactor. Crystals 2018, 8, 318.

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