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A Two-Mode Time-of-Flight Neutron Reflectometer for a Compact Neutron Source DARIA
- Authors: Syromyatnikov V.G.1,2, Grigoryeva N.A.2, Grigoriev S.V.1,2
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Affiliations:
- Petersburg Nuclear Physics Institute, National Research Center “Kurchatov Institute”
- St. Petersburg State University
- Issue: No 7 (2023)
- Pages: 93-101
- Section: Articles
- URL: https://journals.rcsi.science/1028-0960/article/view/137787
- DOI: https://doi.org/10.31857/S102809602307018X
- EDN: https://elibrary.ru/TEMOSE
- ID: 137787
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Abstract
The concept of a two-mode neutron reflectometer with a polarizer, two spin-flippers and an analyzer of polarization after passing through the sample is presented. A reflectometer designed for a compact neutron source DARIA is planned to measure the spectrum of a reflected “white” neutron beam using the time-of-flight method at a fixed glancing angle with the possibility of using both polarized and non-polarized neutrons. The main geometric and physical parameters of the neutron reflectometer are presented. With a neutron pulse duration τ = 100 µs and a total length of the time-of-flight base L = 8 m, the pulse repetition rate can reach f = 165 Hz for the wavelength range Δλ = 3 Å and resolution Δλ ≅ 0.05 Å. The use of polarization analysis elements of a reflectometer at a beam polarization exceeding 96% and an efficiency of spin flippers close to unity makes it possible to study magnetic thin-film nanostructures in detail.
About the authors
V. G. Syromyatnikov
Petersburg Nuclear Physics Institute, National Research Center “Kurchatov Institute”; St. Petersburg State University
Author for correspondence.
Email: syromyatnikov_vg@pnpi.nrcki.ru
Russia, 188300, Gatchina; Russia, 198504, Petrodvorets, St. Petersburg
N. A. Grigoryeva
St. Petersburg State University
Email: syromyatnikov_vg@pnpi.nrcki.ru
Russia, 198504, Petrodvorets, St. Petersburg
S. V. Grigoriev
Petersburg Nuclear Physics Institute, National Research Center “Kurchatov Institute”; St. Petersburg State University
Email: syromyatnikov_vg@pnpi.nrcki.ru
Russia, 188300, Gatchina; Russia, 198504, Petrodvorets, St. Petersburg
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