A DARPA program aimed at preventing attacks involving radiological “dirty bombs” and other nuclear threats has successfully developed and demonstrated a network of smartphone-sized mobile devices that can detect the tiniest traces of radioactive materials. Combined with larger detectors along major roadways, bridges, other fixed infrastructure, and in vehicles, the new networked devices promise significantly enhanced awareness of radiation sources and greater advance warning of possible threats.
The demonstration of efficacy earlier this year was part of DARPA’s SIGMA program, launched in 2014 with the goal of creating a cost-effective, continuous radiation-monitoring network able to cover a large city or region. The demonstration was conducted at one of the Port Authority of New York and New Jersey’s major transportation hubs where DARPA tested more than 100 networked SIGMA sensors…
The pocket-sized radiation “pager” sensors developed by DARPA and used in the exercise can be easily worn on a person’s belt, are one-tenth the cost of conventional sensors, and are up to 10 times faster in detecting gamma and neutron radiation. Moreover, the program achieved its price goal of 10,000 pocket-sized detectors for $400 per unit….A large-scale test deployment of more than 1,000 detectors is being planned for Washington, D.C., later this year.
Excerpt from Ushering in a New Generation of Low-Cost, Networked, Nuclear-Radiation Detectors, OUTREACH@DARPA.MIL, Aug. 23, 2016