SNS magnetism reflectometer: basic design and neutron guide optimization using Monte Carlo simulations

Wai-Tung Lee; Frank Klose

doi:10.1117/12.448069

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8 November 2001 SNS magnetism reflectometer: basic design and neutron guide optimization using Monte Carlo simulations

Wai-Tung Lee, Frank Klose

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Proceedings Volume 4509, Neutron Optics; (2001) https://doi.org/10.1117/12.448069
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

In this contribution, we summarize the optimization of the neutron guide optics of the Magnetism Reflectometer, which is currently under construction at the Spallation Neutron Source. The guide system consists of a straight source tube, a polygonal curved multi-channel bender, and a converging guide section. The bender will be essential for high-energy neutron and g-ray background suppression, while the converging guide will focus the neutron beam onto the sample. Monte Carlo (MC) numerical methods were used to optimize the guide performance. The flux on sample and detector count rates were systematically determined for various guide configurations. The impact of guide imperfections like surface waviness and misalignment of sections are also studied.

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Wai-Tung Lee and Frank Klose "SNS magnetism reflectometer: basic design and neutron guide optimization using Monte Carlo simulations", Proc. SPIE 4509, Neutron Optics, (8 November 2001); https://doi.org/10.1117/12.448069

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