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Abstract

Developing small-angle neutron scattering techniques at compact accelerator-driven neutron sources (CANS) is of great importance for expanding the user community and advancing CANS capability. At the Compact Pulsed Hadron Source (CPHS) at Tsinghua University, neutron-focusing mirrors are under intensive research to address the challenge. A grazing-incidence focusing SANS (gif-SANS) project is initialized. It employs a nested supermirror assembly with a large collecting area to achieve $⩾ 10^{5}$ n/s neutron intensity at $Q_{min} ⩽ 0.007 Å^{- 1}$ . It will equip two detectors, one being a ³He detector for normal Q-range measurements, and the other being a high-resolution detector for extending the $Q_{min}$ down to $10^{- 3} Å^{- 1}$ . In this work, we present the conceptual design of the gif-SANS at CPHS. Such a scheme is conducive to enable high-performance SANS measurements at CANS.

Keywords

SANS neutron-focusing mirrors compact neutron source

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