Hardware There are two models of Micro-Detective available:
- Micro-Detective: Lightweight, Portable HPGe Identifier with Gamma and Neutron detection.
- Micro-Detective-DX: “Gamma only” version of the Micro-Detective. Both models of the Micro-Detective feature the same compact, light weight and rugged hardware.
A 50 mm diameter HPGe crystal in a “hardened” cryostat is cooled by an integrated low-power Stirling-cycle cryocooler. The latest revision Micro-Detective features a new cooler offering reduced levels of acoustic noise and vibration, and longer operation life. The hardened cryostat is entirely free of conventional molecular sieve allowing the instrument to be turned off or on at any point in the detector cool-down or warm-up cycle without risk. This is impossible with conventional HPGe cryostat systems which require careful temperature cycling procedures to avoid damage. A built-in digital MCA system and powerful data processor are included.
All models feature the same bright and clear VGA resolution display, readable in direct sunlight, with a touch sensitive operator screen. Menu navigation is highly intuitive. The radionuclide gamma-ray spectrum may be displayed and manipulated (e.g., vertical scale, zoom) like a conventional multichannel analyzer. Gamma and neutron count rate and gamma dose rate are displayed continuously both numerically and in bar graph form.
In the latest version, the Micro-Detective internal battery provides enough power for up to 5 hours of operation and is easily replaced in seconds, allowing continuous in-field operation. At just under 16 lbs. in weight, the Micro-Detective sets a world record for portable, high resolution nuclide identifiers, by a wide margin. Analysis Capabilities Since initial introduction of the first Detective instruments, identification performance capabilities have iteratively been improved through taking part in many independent performance testing programs. These programs are sponsored by governmental and international organizations, such as the US DTRA, the IAEA, and most recently the on-going international ITRAP-plus 10 testing program. Micro-Detective performance has continued to advance as a result of these rigorous test programs. As the needs and best practices of deploying organizations have also evolved, Detective software features have expanded to meet these new requirements.