A micro-gap, air-filled ionisation chamber as a detector for criticality accident dosimetry

Abstract

A micro-gap air-filled ionisation chamber was designed for criticality dosimetry. The special feature of the chamber is its very small gap between electrodes of only 0.3 mm. This prevents ion recombination at high dose rates and minimises the influence of gas on secondary particles spectrum. The electrodes are made of polypropylene because of higher content of hydrogen in this material, when compared with soft tissue. The difference between neutron and gamma sensitivity in such chamber becomes practically negligible. The chamber's envelope contains two specially connected capacitors, one for polarising the electrodes and the other for collecting the ionisation charge.

Research on angle sensitivity of the boron-lined multilayer converter neutron detector

“…Neutron detectors have been widely used in the fields of homeland security [1,2], industrial applications [3,4], medical treatment [5,6], and neutron spectroscopy [7][8][9], accelerating 5 Joint first authors. * Author to whom any correspondence should be addressed.…”