Abstract
We have developed and tested a thermal-neutron, two-dimensional position-sensitive detector for use in neutron scattering from biological samples. The detector is based on a multi-wire proportional concept with a gas filling of 6 atm 3He, 4 atm A, and 0.5 atm CO 2. The position readout uses a resistive wire with charge division to determine position. We have measured a resolution of less than 3 mm (fwhm) with a detection efficiency of 70% at 2.8 Å neutrons. Considerations leading to an optimal configuration are discussed.
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