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Neutron polarization control for beam handling and spectrometry

Yamazaki, Dai  ; Ebisawa, Toru*

Neutron spin handling could be used for beam control and spectroscopy. Energy analysis could be performed with Drabkin energy filters, by which inelastic component with a $$Deltalambda$$, a $$Deltalambda/lambda$$ or a $$Delta{E}$$ could be extracted for all incident wavelength. Pulsed spin-flipper and polarization analyzer could be used as a neutron chopper (spin-flip chopper) whose opening time, number of windows and phase are controlled independently. It was demonstrated that S/N ratio can be enhanced up to 1.5 $$times$$ 10$$^{5}$$ by installing three spin-flip choppers in sequence.

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