Progress in Simulating/Realisation SESANS in Time-of-Flight Mode at Pusled and Stationary Neutron Sources

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Progress in Simulating/Realisation SESANS in Time-of-Flight Mode at Pusled and Stationary Neutron Sources

Journal Article (2020)

Author(s)

W. H. Kraan (TU Delft - RST/Neutron and Photon Methods for Materials)

L. A. Akselrod (Petersburg Nuclear Physics Institute (PNPI))

E. G. Yashina (Petersburg Nuclear Physics Institute (PNPI))

A. A. Sumbatyan (Petersburg Nuclear Physics Institute (PNPI))

S. V. Grigoriev (Petersburg Nuclear Physics Institute (PNPI))

Small angle neutron scattering Larmor precession Matrix multiplication

DOI related publication

https://doi.org/10.1134/S1027451020070253 Final published version

To reference this document use

https://resolver.tudelft.nl/uuid:4e262d8f-fc74-4627-ab2f-e1f7a9c64abe

More Info

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Publication Year

2020

Language

English

Volume number

14

Pages (from-to)

S108-S116

Downloads counter

202

Abstract

Abstract: We created software to simulate the Larmor precession in a setup for SESANS with adiabatic/radio frequency flippers in magnets designed to measure the time-of-flight on pulsed or stationary neutron sources. The values and spatial configurations of the magnetic fields of the existing prototype magnets we used as input data. For an empty setup, we calculate the polarization of a “divergent ribbon beam” 2 cm high, depending on the neutron wavelength λ. In the “scattering experiment”, we show how to convert λ to the “spin-echo length” δ. For λ = 10 Å, flippers at a distance of 140 cm and a radio frequency 1 MHz we find δ ≈ 10 μm. Extension to δ = 20 μm is realistic.