Wide-angle polarization analysis with 3 He for neutron scattering instrumentation at the JCNS A Ioffe, E Babcock, V Pipich et al. -Polarized 3 He cell development and application at NIST W C Chen, T R Gentile, C B Fu et al. -Recent citations Conceptual design of a polarized 3 He neutron spin filter for polarized neutron spectrometer POLANO at J-PARC T Ino et al -Structure of glasses for 3 He neutron spin filter cells Y Sakaguchi et al -This content was downloaded from IP address 207.241.231.80

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... n 26/07/2018 at 04:37 Abstract. In spin-exchange optical pumping, there is unknown excess relaxation, called the Xfactor, that limits attainable 3 He polarization. It is known that the X-factor depends on the glass containers. Hence, it is expected that there are cell-to-cell variations in microscopic structure among the cells and that these variations affect the attainable 3 He polarization. However, microscopic structure of the glasses for 3 He neutron spin filters has not been clarified yet. In this paper, we have performed precise X-ray diffraction measurements for the glasses at SPring-8 using synchrotron radiation. The structural differences are observed between several types of glasses, and also, between the GE180 glass pieces with different thermal treatment. Based on the results, the structural influence on the performance of 3 He neutron spin filters is discussed.