We present the design, description, calibration procedure, and an analysis of systematic effects for an apparatus designed to measure the rotation of the plane of polarization of a transversely polarized slow neutron beam as it passes through unpolarized matter. This device is the neutron optical equivalent of a crossed polarizer/analyzer pair familiar from light optics. This apparatus has been used to search for parity violation in the interaction of polarized slow neutrons in matter. Given the brightness of existing slow neutron sources, this apparatus is capable of measuring a neutron rotary power of dϕ/dz = 1 × 10−7 rad/m.

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Published in Review of Scientific Instruments, v. 86, no. 5, article 055101, p. 1-23.

Copyright 2015 AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing.

The following article appeared in Review of Scientific Instruments, v. 86, no. 5, article 055101, p. 1-23 and may be found at http://dx.doi.org/10.1063/1.4919412.

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This work was supported in part by NSF PHY-0457219, NSF PHY-0758018, DE-AI02-93ER40784, DE-SC0010443, DE-FG02-95ER40901, and UNAM Grant No. PAPIIT-UNAM IN111913. We acknowledge the support of the National Institute of Standards and Technology, US Department of Commerce, in providing the neutron facilities used in this work. H. Gardiner, D. Esposito, and J. Lieffers acknowledge support from the NSF Research Experiences for Undergraduates program NSF PHY-1156540. W. M. Snow, E. Anderson, J. Fry, C. Haddock, and A. T. Holley acknowledge support from the Indiana University Center for Spacetime Symmetries.

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