A positron camera for industrial application

Abstract

A positron camera for application to flow tracing and measurement in mechanical subjects is described. It is based on two 300 × 600 mm2 hybrid multiwire detectors; the cathodes are in the form of lead strips plated onto printed-circuit board, and delay lines are used to determine the location of photon interactions. Measurements of the positron detection efficiency (30 Hz μCi−1 for a centred unshielded source), the maximum data logging rate (3 kHz) and the spatial resolving power (point source response = 5.7 mmfwhm) are presented and discussed, and results from initial demonstration experiments are shown.

Authors

Hawkesworth MR; O'Dwyer MA; Walker J; Fowles P; Heritage J; Stewart PAE; Witcomb RC; Bateman JE; Connolly JF; Stephenson R

Journal

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment, Vol. 253, No. 1, pp. 145–157