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

TY - JOUR

T1 - Investigation of propagation algorithms for ray-tracing simulation of polarized neutrons

AU - Knudsen, E.B.

AU - Rømer, Astrid Tranum

AU - Willendrup, Peter Kjær

AU - Christiansen, P.

AU - Lefmann, Kim

PY - 2014/1/1

Y1 - 2014/1/1

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.

U2 - 10.3233/jnr-130003

DO - 10.3233/jnr-130003

M3 - Journal article

SN - 1023-8166

VL - 17

SP - 27

EP - 34

JO - Journal of Neutron Research

JF - Journal of Neutron Research

IS - 1

ER -