Investigation of propagation algorithms for ray-tracing simulation of polarized neutrons

E.B. Knudsen; Astrid Tranum Rømer; Peter Kjær Willendrup; P. Christiansen; Kim Lefmann

doi:10.3233/jnr-130003

Investigation of propagation algorithms for ray-tracing simulation of polarized neutrons

E.B. Knudsen, Astrid Tranum Rømer, Peter Kjær Willendrup, P. Christiansen, Kim Lefmann

Xray and Neutron Science

4 Citations (Scopus)

Abstract

Ray-tracing of polarized neutrons faces a challenge when the neutron propagates through an inhomogeneous magnetic field. This affects simulations of novel instruments using encoding of energy or angle into the neutron spin. We here present a new implementation of propagation of polarized neutrons within the McStas simulation package and show that it outperforms the de-facto standard method implemented in the NISP package by Seeger and Daemen. We include simulation of a simplified model of a spin-echo instrument, including a simple virtual experiment.

Original language	English
Journal	Journal of Neutron Research
Volume	17
Issue number	1
Pages (from-to)	27-34
ISSN	1023-8166
DOIs	https://doi.org/10.3233/jnr-130003
Publication status	Published - 1 Jan 2014

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AU - Knudsen, E.B.

AU - Rømer, Astrid Tranum

AU - Willendrup, Peter Kjær

AU - Christiansen, P.

AU - Lefmann, Kim

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N2 - Ray-tracing of polarized neutrons faces a challenge when the neutron propagates through an inhomogeneous magnetic field. This affects simulations of novel instruments using encoding of energy or angle into the neutron spin. We here present a new implementation of propagation of polarized neutrons within the McStas simulation package and show that it outperforms the de-facto standard method implemented in the NISP package by Seeger and Daemen. We include simulation of a simplified model of a spin-echo instrument, including a simple virtual experiment.

AB - Ray-tracing of polarized neutrons faces a challenge when the neutron propagates through an inhomogeneous magnetic field. This affects simulations of novel instruments using encoding of energy or angle into the neutron spin. We here present a new implementation of propagation of polarized neutrons within the McStas simulation package and show that it outperforms the de-facto standard method implemented in the NISP package by Seeger and Daemen. We include simulation of a simplified model of a spin-echo instrument, including a simple virtual experiment.

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JF - Journal of Neutron Research

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Investigation of propagation algorithms for ray-tracing simulation of polarized neutrons

Abstract

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