Study of counting characteristics of porous dielectric detectors of radiations

Multiwire and microstrip porous detectors have been developed and investigated for DC operation. The multiwire porous detector consists of anode wires, an Al cathode and a gap between them filled with porous CsI. The microstrip porous detector consists of an insulating plate covered with metallic strips, micromesh cathode and a gap between them filled with porous CsI. For some time after being manufactured, these detectors’ performances are non-stable and they have poor spatial resolution. However, after being kept in vacuum for a certain time, they spontaneously acquire stability and spatial resolution better than 100 μm and have detection efficiencies of 100% and 70% for heavily ionizing α-particles and 5.9 keV X-rays, respectively. The MWPDD performs stably at an intensity of heavily ionizing α-particles of 711 cts/(cm2 s).