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

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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.

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Funding

This work is supported by the Russian Science Foundation (grant no. 19-12-00363).

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Authors and Affiliations

  1. Delft University of Technology, 2629, JB Delft, The Netherlands

    W. H. Kraan

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

    L. A. Akselrod, E. G. Yashina, A. A. Sumbatyan & S. V. Grigoriev

Authors
  1. W. H. Kraan
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  2. L. A. Akselrod
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  3. E. G. Yashina
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  4. A. A. Sumbatyan
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  5. S. V. Grigoriev
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Correspondence to W. H. Kraan.

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Kraan, W.H., Akselrod, L.A., Yashina, E.G. et al. Progress in Simulating/Realisation SESANS in Time-of-Flight Mode at Pusled and Stationary Neutron Sources. J. Surf. Investig. 14 (Suppl 1), S108–S116 (2020). https://doi.org/10.1134/S1027451020070253

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  • DOI: https://doi.org/10.1134/S1027451020070253

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