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The present calculations describing the Bonse-Hart Ultra-Small-Angle Neutron Scattering (USANS) Instrument with triple-bounce Si channel-cut crystals show that significant gains in neutron flux and Q-resolution can be achieved using multiple high-order Bragg reflections. These reflections become usable only after combining the Bonse-Hart and Time-of-Flight techniques, thus this variant of the USANS camera needs a pulsed neutron source. We clearly demonstrate that new instruments of that type installed at the SNS water moderator will improve the current state-of-the art USANS camera dramatically increasing the neutron flux and sharpening the Q-resolution by almost one order of magnitude.
Michael M. Agamalian,John M. Carpenter,K. C. Littrell,Pappannan Thiyagarajan, andChristine Rehm
"Time-of-flight ultrasmall-angle neutron scattering instrument for SNS", Proc. SPIE 4785, Advances in Neutron Scattering Instrumentation, (18 November 2002); https://doi.org/10.1117/12.469979
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Michael M. Agamalian, John M. Carpenter, K. C. Littrell, Pappannan Thiyagarajan, Christine Rehm, "Time-of-flight ultrasmall-angle neutron scattering instrument for the SNS," Proc. SPIE 4785, Advances in Neutron Scattering Instrumentation, (18 November 2002); https://doi.org/10.1117/12.469979