Abstract
A time-of-flight spectrometer has been constructed at the JAERI 20 MV tandem accelerator facility. A position-sensitive start detector (PSSD), which consists of a thin carbon foil, microchannel plates and a resistive plate, was developed for the time-of-flight measurements through the spectrometer. The time and position resolutions were found to be 120 ps and 0.3 mm (fwhm) respectively for α particles from 241 Am. The position sensitivity of the PSSD is useful for correcting not only the flight-path difference, but also the kinematic effect of the reaction products. A two-dimensional position-sensitive detector was also developed to measure the solid angle of the spectrometer and the maximum solid angle was obtained to be 9.5 msr.
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