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Inelastic Neutron Scattering Spectrometer INDIGO (Indirect Geometry) at the DARIA Compact Neutron Source

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Abstract

The characteristics of an indirect-geometry spectrometer and possibilities of its creation on a compact pulsed neutron source under conditions of its low luminosity are estimated. The configuration of a secondary spectrometer with a position-sensitive detector and a curved crystal analyzer is proposed, which ensures the capture of scattered neutrons at the largest solid angle. The main parameters of the instrument are calculated analytically. Based on the technical requirements for the parameters of the instrument, the numerical simulation is constructed and calculations of the instrument resolution as a function of the energy transfer are performed applying the Monte Carlo method. The analytical resolution function and the resolution function obtained from the simulation show good agreement when considering the contribution from the pulse width. An estimate of the neutron flux on the sample is obtained. The in-principle possibility of implementation of the neutron spectroscopy method under conditions of a compact source is shown.

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Funding

The paper was supported by the Russian Foundation for Basic Research, project no. 18-32-01074.

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Authors and Affiliations

  1. St. Petersburg State University, 198504, St. Petersburg, Russia

    A. E. Pavlova, K. A. Pavlov & S. V. Grigoriev

  2. Petersburg Nuclear Physics Institute, National Research Center “Kurchatov Institute”, 188300, Gatchina, Leningrad oblast, Russia

    A. E. Pavlova, A. O. Petrova, P. I. Konik, K. A. Pavlov & S. V. Grigoriev

Authors
  1. A. E. Pavlova
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  2. A. O. Petrova
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  3. P. I. Konik
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  4. K. A. Pavlov
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  5. S. V. Grigoriev
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Corresponding authors

Correspondence to A. E. Pavlova or P. I. Konik.

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Translated by N. Semenova

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Pavlova, A.E., Petrova, A.O., Konik, P.I. et al. Inelastic Neutron Scattering Spectrometer INDIGO (Indirect Geometry) at the DARIA Compact Neutron Source. J. Surf. Investig. 15, 70–75 (2021). https://doi.org/10.1134/S1027451021010122

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  • DOI: https://doi.org/10.1134/S1027451021010122

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