TY - JOUR

T1 - Time-of-Flight Neutron Reflectometer for the DARIA Compact Neutron Source: Monte Carlo Simulation

AU - Grigoryeva, N.A.

AU - Kovalenko, N.A.

AU - Grigoriev, S.V.

N1 - Export Date: 01 November 2025; Cited By: 0; Correspondence Address: N.A. Grigoryeva; Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620108, Russian Federation; email: n.a.grigorieva@yandex.ru

PY - 2024

Y1 - 2024

N2 - Abstract: Two types of polarized neutron reflectometers have been simulated for the compact neutron source DARIA (Dedicated for Academical Research and Industrial Application), depending on the type of target assembly with thermal or cryogenic moderators. Modeling and optimization of reflectometers were carried out using McStas software package by the Monte Carlo method with specified momentum transfer resolution Δq/q ≤ 5% for reflection angles greater than the critical angle θcr and a neutron beam horizontal divergence of Δθ ≤ 0.1° for θ < θcr and Δθ ≤ 0.033° for θ > θcr. To reduce losses in neutrons, neutron guides with a supermirror coating have been proposed. A system of choppers makes it possible to create a neutron spectrum of the required width on a sample. © 2025 Elsevier B.V., All rights reserved.

AB - Abstract: Two types of polarized neutron reflectometers have been simulated for the compact neutron source DARIA (Dedicated for Academical Research and Industrial Application), depending on the type of target assembly with thermal or cryogenic moderators. Modeling and optimization of reflectometers were carried out using McStas software package by the Monte Carlo method with specified momentum transfer resolution Δq/q ≤ 5% for reflection angles greater than the critical angle θcr and a neutron beam horizontal divergence of Δθ ≤ 0.1° for θ < θcr and Δθ ≤ 0.033° for θ > θcr. To reduce losses in neutrons, neutron guides with a supermirror coating have been proposed. A system of choppers makes it possible to create a neutron spectrum of the required width on a sample. © 2025 Elsevier B.V., All rights reserved.

KW - DARIA compact neutron source

KW - modeling

KW - Monte Carlo method

KW - reflectometer

KW - transmitted-pulse resolution of a reflectometer

KW - Neutron detectors

KW - Neutron reflection

KW - Dedicated for academical research and industrial application compact neutron source

KW - Modeling

KW - Monte Carlo's simulation

KW - MonteCarlo methods

KW - Polarized neutrons

KW - Pulse resolution

KW - Thermal

KW - Time-of flight

KW - Transmitted pulse

KW - Transmitted-pulse resolution of a reflectometer

KW - Reflectometers

U2 - 10.1134/S102745102470160X

DO - 10.1134/S102745102470160X

M3 - Article

VL - 18

SP - 1602

EP - 1614

JO - ПОВЕРХНОСТЬ. РЕНТГЕНОВСКИЕ, СИНХРОТРОННЫЕ И НЕЙТРОННЫЕ ИССЛЕДОВАНИЯ

JF - ПОВЕРХНОСТЬ. РЕНТГЕНОВСКИЕ, СИНХРОТРОННЫЕ И НЕЙТРОННЫЕ ИССЛЕДОВАНИЯ

SN - 1027-4510

IS - 6

ER -