Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

A Wide Angle Neutron Spin Filter System Using Polarized 3He



Changbo Fu, Thomas R. Gentile, Wangchun Chen, Ross Erwin, Shannon M. Watson, Collin L. Broholm, Jose Rodriguez Rivera, Julia Scherschligt, G L. Jones


Polarized 3He neutron spin filters can operate over a wide neutron energy range and provide a large angular acceptance. A compact 3He neutron spin filter system has been developed for the Multi Axis Crystal Spectrometer at the NIST Center for Neutron Research. Sealed 3He 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 3He gas in the polarizer, with only a small effect on the analyzer cells. The cell fabrication process, 3He spin flipper, and the holding magnetic field are discussed and we present the results of a first on-line test.
Physica B & C


Polarized Helium-3, He-3 Neutron Spin Filter, Wide Angle He-3 Cell


Fu, C. , Gentile, T. , Chen, W. , Erwin, R. , Watson, S. , Broholm, C. , Rodriguez Rivera, J. , Scherschligt, J. and Jones, G. (2010), A Wide Angle Neutron Spin Filter System Using Polarized 3He, Physica B & C (Accessed April 20, 2024)
Created October 15, 2010, Updated October 12, 2021