Abstract
Abstract The unique advantages of using polarized 3 He as neutron spin filters, such as broadband and wide angular acceptance of neutron beams, have made it widely used in most neutron facilities. Over the last several years, we have developed a polarized 3 He program to meet the increasing needs of 3 He based neutron spin filters at the Oak Ridge National Laboratory's (ORNL) High Flux Isotope Reactor (HFIR) and Spallation Neutron Source (SNS). At ORNL, polarized 3 He is produced using Spin Exchange Optical Pumping (SEOP). We have constructed a 3He cell fabrication station to produce 3 He cells of different pressures and dimensions. Two optical pumping stations have been built in the lab to perform ex situ pumping of 3 He. A compact in situ 3 He analyzer has been constructed and installed for the Magnetism Reflectometer (MAGICS) at SNS. A novel polarized 3 He filling station for the Hybrid Spectrometer (HYSPEC) at SNS is under development.
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