The PERC instrument aims to measure several correlation coefficients of neutron beta decay with an accuracy of 10^-4. This requires neutron spin control on the same level. In this work, I present a non-depolarizing Cu/Ti neutron supermirror with m = 2 and excellent reflectivity of 92% at the critical angle of reflection. The beamline setup is discussed with Monte-Carlo simulations based on the reflectivity curves of these supermirrors. In order to achieve a high polarization of the neutron beam, I investigate Fe/Si supermirror coatings in normal and inverted layer sequence on different substrates.
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The PERC instrument aims to measure several correlation coefficients of neutron beta decay with an accuracy of 10^-4. This requires neutron spin control on the same level. In this work, I present a non-depolarizing Cu/Ti neutron supermirror with m = 2 and excellent reflectivity of 92% at the critical angle of reflection. The beamline setup is discussed with Monte-Carlo simulations based on the reflectivity curves of these supermirrors. In order to achieve a high polarization of the neutron beam,...
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