Conceptual Design of a Time-of-Flight Powder Diffractometer for a Compact Neutron Source

E. V. Moskvin; Москвин Е. В.; N. A. Grigoryeva; Григорьева Н. А.; N. A. Kovalenko; Коваленко Н. А.; S. V. Grigoriev; Григорьев С. В.

doi:10.31857/S1028096023070105

Conceptual Design of a Time-of-Flight Powder Diffractometer for a Compact Neutron Source

Authors: Moskvin E.V.¹^,2, Grigoryeva N.A.¹, Kovalenko N.A.¹^,2, Grigoriev S.V.¹^,2
Affiliations:
1. Saint-Petersburg State University
2. Petersburg Nuclear Physics Institute named by B.P. Konstantinov of NRC “Kurchatov Institute”
Issue: No 7 (2023)
Pages: 77-83
Section: Articles
URL: https://freezetech.ru/1028-0960/article/view/664539
DOI: https://doi.org/10.31857/S1028096023070105
EDN: https://elibrary.ru/TCSHSM
ID: 664539

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Abstract

A conceptual design of a powder diffractometer for a compact neutron source DARIA based on a linear proton accelerator is presented. The proposed concept extends the possibilities of optimizing the device performance not only by varying the diffractometer parameters, but also the neutron source parameters, such as the moderator temperature, repetition rate, and duration of neutron pulses. The results of calculating the spectrum of the target assembly for different types of moderators are presented. The efficiency of the neutron source system for increasing the neutron flux on the sample is evaluated in the McStas software package. The calculation results show the principal possibility of implementing the neutron diffraction method under conditions of limited luminosity of the compact neutron source.

Keywords

neutron diffraction, powder diffractometer, compact neutron source, Monte Carlo method.

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