Study of boron coated straw detectors for small angle neutron scattering on CPHS

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He gaseous detectors have been widely used for homeland security and neutron scattering applications. Due to the
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He supply crisis, different alternative thermal neutron detection techniques have been studied in recent years. And the boron coated straw tube detectors (BCSD) have been chosen as one of the potential replacements of
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He gaseous detectors for the adequate supply and large cross section with thermal neutrons of
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B. In this work, we developed 8 mm diameter BCSDs planned for the future small angle neutron scattering (SANS) spectrometer at Tsinghua Compact Pulsed Hadron Source (CPHS). The axial position resolution and thermal neutron detection efficiency of the new BCSD tube were studied. The test results of the BCSD are presented in this paper.