Article Title

A wide angle neutron spin filter system using polarized He-3

Type of Work

Article

Date

6-1-2011

Journal Title

Physica B: Condensed Matter

Journal ISSN

0921-4526

Journal Volume

406

Journal Issue

12

First Page

2419

Last Page

2423

DOI

10.1016/j.physb.2010.10.002

Abstract

Polarized He-3 neutron spin filters can operate over a wide neutron energy range and provide a large angular acceptance. A compact He-3 neutron spin filter system has been developed for the Multi-Axis Crystal Spectrometer at the National Institute of Standards and Technology (NIST) Center for Neutron Research. Sealed He-3 cells, polarized by spin-exchange optical pumping, are used as polarizer and analyzer. The polarization of the neutrons incident on the sample is inverted by flipping the polarization of the He-3 gas in the polarizer, with only a small effect on the analyzer cells. The cell fabrication process, He-3 spin flipper, and the holding magnetic field are discussed and we present the results of a first on-line test. (C) 2010 Elsevier B.V. All rights reserved.

Hamilton Areas of Study

Physics