Tandem analyzer crystals system doubles counting rate for Bonse–Hart ultra-small-angle neutron-scattering spectrometer
✍ Scribed by Daisuke Yamaguchi; Satoshi Koizumi; Ryuhei Motokawa; Takayuki Kumada; Kazuya Aizawa; Takeji Hashimoto
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 395 KB
- Volume
- 385-386
- Category
- Article
- ISSN
- 0921-4526
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✦ Synopsis
A new tandem analyzer crystals system was introduced on Bonse-Hart ultra-small-angle neutron-scattering spectrometer at research reactor JRR-3, Tokai, Japan. Conventional Bonse-Hart setup consumes a considerable time to measure a scattering profile of whole q range (2 Â 10 À4 nm À1 oqo7 Â 10 À2 nm À1 , where q denotes magnitude of scattering vector) due to the step scan system, in which the scattered neutrons from the sample and having different q are measured step by step. To overcome this difficulty two analyzer channelcut silicon perfect crystals were settled in tandem and each of them diffracted the scattering of different q. In consequence, a simultaneous detection at two different q positions was realized and the measurement time was reduced to half.