Image

Electronic “Sniffer” Searches Out Nuclear Devices

Nov. 20, 2014
Engineers at Sandia National Laboratory have built a mobile imager of neutrons for emergency responders (MINER).
Sandia researchers pose with MINER, a portable device that can detect and pinpoint the source of neutron emissions from nuclear weapons.

The nightmare scenario for the Dept. of Homeland Security is a briefcase-sized nuclear weapon on the loose in a major U.S. city. To counter this potential threat, engineers at Sandia National Laboratory have built a mobile imager of neutrons for emergency responders (MINER). It is a portable neutron scatter camera that detects fast neutrons emanating from nuclear materials. It should let police forces pinpoint the source of the neutrons at significant distances and despite shielding.

MINER’s design is based on that of a larger scatter camera that stands 5 ft tall and requires a special power source. In contrast, MINER is about 3 ft tall and weighs 90 lb. Inside, 16 proton-rich liquid scintillator detector cells circle a large cylinder. Neutrons travel through the cells, bouncing off protons like ping pong balls. These interactions among the detector cells let the device calculate what direction those neutrons came from. Compared to other detectors, this technology lets MINER pick out the target radiation from background radiation and can measure the spectrum of neutrons being emitted. This lets it tell the difference between neutrons from plutonium, a threat, and americium-beryllium, a common commercial source of neutrons and not a threat. MINER also searches a 360° horizon. Other detectors have a narrow field of view and must be pointing in the source’s direction to pick it up.

MINER can be set up and operating in 10 minutes and uses battery power, which makes it more portable.

In a field test set in downtown Chicago recently, MINER found a sealed radiation source in 30 minutes. In fact, the device could scan an entire side of a skyscraper at one time, quickly narrowing the search down to a single room. When the source was shielded, the search took a few hours.

Sponsored Recommendations

Aug. 22, 2025
Discover how to meet growing customer demands for custom products without overextending your engineering team. Learn how scaling your automation strategy can help you win more...
Aug. 22, 2025
Join industry leaders to explore how cutting edge digital technologies are transforming factories. Learn how to boost throughput, enhance flexibility, and accelerate your digital...
Aug. 22, 2025
Explore the future of manufacturing. Learn how to leverage the latest digital technologies and strategies to build a more efficient, agile, and resilient digital factory.
Aug. 21, 2025
A look into the latest improvements in motion control through high-performance drives, AI enhancements, and faster communication protocols.

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!