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

作者：Fu C B^*; Gentile T R; Jones G L; Chen W C; Erwin R; Watson S; Broholm C; Rodriguez Rivera J A; Scherschligt J

来源：Physica B: Condensed Matter , 2011, 406(12): 2419-2423.

DOI：10.1016/j.physb.2010.10.002

• Polarized He-3
• He-3 neutron spin filter
• Wide angle He-3 cell

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.

• 出版日期2011-6