Abstract
A gaseous neutron-imaging detector with individual signal readouts was developed for a high spatial resolution and a fast temporal response. The system comprises a multiwire head, a gas chamber with 541 channels, fast amplifier-shaper-discriminator boards, a logic circuit for position calculation and encoding, and a fast data-acquisition system. The developed prototype detector incorporating 40×40 channels exhibited a temporal response of ∼100ns (pulse width of the amplified signal) and a spatial resolution of 0.9 and 1.4mm (full width at half maximum) in the x- and y-directions, respectively, with a gas pressure of 4.2-atm helium with 1.8-atm CF4.
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