Polaris-H is a commercial portable detector system, comprised of a Compton camera which uses three-dimensional position-sensitive cadmium zinc telluride (CZT) detectors to take measurements at nuclear power plants.
“Polaris-H, a compact Compton camera designed by H3D, Inc. has been characterized
and tested in field measurements at nuclear power plants. Polaris-H integrates a 3D
position-sensitive pixelated CZT detector (20 mm × 20 mm × 15 mm), associated readout
electronics, an embedded computer, a 5-hour battery, and an optical camera all within a
portable water-resistant case. The total mass is about 4 kg. Start-up time is 2 minutes.
Additionally, there is a connection for a tablet, which displays a real-time gamma-ray
spectrum (near 1% FWHM at 662 keV) and isotope-specific images of the radiation
distribution in all 4π in real time. The newest design of Polaris-H features the capability
to control data acquisition without using a tablet interface, a higher energy dynamic
range, and a higher maximum count rate. Absolute efficiency, imaging efficiency, energy
resolution, and detection and identification performance are presented. Measurements
are shown for applications of decontamination and detection of previously unknown
-Polaris-H Measurements and Performance, Abstract