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A prototype of large-area position sensitive neutron detector was designed and constructed according to the requirements of the Small-Angle Scattering spectrometer of China Spallation Neutron Source(CSNS).The detector was based on the 3He neutron convertor and MWPC with an effective area of 650 mm×650 mm.A prototype was completed and tested with 55Fe X-ray.The high-pressure vessel was designed and constructed with high-strength aluminum alloy.A position resolution of about 4.6mm×2.3 mm(FWHM)and efficiency>65%for neutrons with wavelength of 1.8?was determined after the operational gas filled.
A prototype of large-area position sensitive neutron detector was designed and constructed according to the requirements of the Small-Angle Scattering Spectrometer of China Spallation Neutron Source (CSNS). The detector was based on the 3He neutron convertor and MWPC with an effective area of 650 mm × 650 mm. A prototype was completed and tested with 55 Fe X-ray. The high-pressure vessel was designed and constructed with high-strength aluminum alloy. A position resolution of about 4.6 mm × 2.3 mm (FWHM) and efficiency> 65% for neutrons with wavelength of 1.8? Was determined after the operational gas filled.