Position‐Sensitive Detector with GaAs photocathode and high time resolution

The Position‐Sensitive Detector (PSD) on base of GaAs photocathode and microchannel plate set has been developed. PSD consists of thick semi‐conductor photocathode with quantum efficiency about 48% in the range of 4000–7500 A, two micro‐channel plates, and 16‐electrode collector. The detector has spatial resolution of 20–40 microns for about 5⋅102 pixels, time resolution of 1 μs and effective sensitivity up to 35%.