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chn om Pa lint We have tested two 3He neutron spin filters (NSF), one for the polarizer and one for the analyzer, in conjunction with a doubly Polarized neutron scattering (PNS) is a powerful tool significant improvements in their performance [2–4]. Compared to supermirrors and Heusler crystals, 3He NSFs can polarize both large area and large divergence neutron and magnetize in the large focusing arrays required for these new methods. Additionally, 3He spin filters have greater versatility in the selection of energy and polariza-ARTICLE IN PRESStion. In order to utilize these instrumental advances for polarized thermal neutron beams, it is advantageous to use 3He polarizers instead of Heusler crystals. 0921-4526/ $- see front matter r 2007 Published by Elsevier B.V. doi:10.1016/j.physb.2007.02.05