Design and experimental results of a large, position sensitive, multi-wire prototype detector developed at BNC

A two-dimensional position sensitive multi-wire prototype neutron detector has been designed and constructed at the Budapest Neutron Center as part of the development program for large area high efficiency neutron detectors for SANS and TOF diffractometer instruments. The prototype is a 3He and CF4 filled position sensitive detector, with a sensitive area of 800×500 mm2, having an average vertical position resolution of 3.8 mm, horizontal position resolution of 3 mm and efficiency >74% at neutron wavelength λ=3.14 Å. The design and cold neutron test results of this detector are presented.