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Tandem analyzer crystals system doubles counting rate for Bonse-Hart ultra-small-angle neutron-scattering spectrometer

Yamaguchi, Daisuke; Koizumi, Satoshi; Motokawa, Ryuhei   ; Kumada, Takayuki   ; Aizawa, Kazuya  ; Hashimoto, Takeji

A new tandem analyzing system was introduced on Bonse-Hart ultra-small angle neutron scattering (USANS) spectrometer. In the normal setup of USANS it consumes a considerable time to take a scattering profile of whole q-range (2$$times$$10$$^{-4}$$ nm$$^{-1}$$ $$<$$ q $$<$$ 7$$times$$10$$^{-2}$$ nm$$^{-1}$$, where q denotes magnitude of scattering vector) due to the step scan system, in which the scattering waves from the sample and having different q are measured step by step. To overcome this difficulty two analyzer channel-cut silicon perfect crystals were settled in tandem and each of them diffracted the scattering wave of different q. In consequence, a simultaneous detection at two different q positions was realized and the measurement time was reduced to half.

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Category:Physics, Condensed Matter

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