Efforts to contain weapons of mass destruction have recently intensified, in response to increasing terrorist activities worldwide. The ultimate scenario for nuclear terrorism involves the smuggling of nuclear weapons, or the material to make them, and subsequent detonation in densely populated cities. Widespread monitoring in ports of entry is part of the solution proposed by experts.

Current neutron detectors, such as ³He tubes, have significant practical limitations, including high cost and substantial weight and bulkiness, and are dangerous in portable use due to the high pressure required. Therefore, a compelling need has emerged for alternative detectors with more favorable characteristics.

The PT100NG has been designed to address this need. It is a portable, lightweight and economical monitor with high sensitivity for both neutron and gamma detection, and a directional neutron response that allows the operator to quickly identify the location of a hidden source.

The PT100NG is based on our innovative neutron-gamma straw detector element, a thin-walled copper tube, lined with a 1 μm thick coating of enriched boron carbide. A close-packed array of many such straw detectors form the core of the monitor. Neutrons are converted in ¹⁰B, while gammas are converted in Cu.

Neutron and gamma counting: measurements of neutron and gamma counts can be collected and displayed simultaneously.

Complete customization : alarm thresholds for neutron and gamma counts can be set both automatically, following a background count, or manually.

Neutron collimator: an innovative, lightweight neutron collimator gives the PT100NG the ability to identify the direction of a hidden source.

Lightweight / Portable operation: the PT100NG weighs only 8 lbs (3.6 kg) and can be operated on a single battery charge for up to 16 hours.

PDA: A handheld computer (PDA) is used to display the readout, including count rates and energy spectra, and to control the various functions and settings of the monitor. The PDA requires a separate, built-in, rechargeable battery.