Scientists Use Chemistry To Keep Soldiers Safe | WAMU 88.5 - American University Radio

WAMU 88.5 : Metro Connection

Filed Under:

Scientists Use Chemistry To Keep Soldiers Safe

Play associated audio
A pistol-shaped air sniffer called FIDO
Kimberly Bell, U.S. Army's Night Vision and Electronic Sensor Directorate
A pistol-shaped air sniffer called FIDO

Not far from Washington D.C., a team of civilian scientists at Virginia’s Fort Belvoir use chemistry to keep U.S. soldiers safe from explosives. Aaron LaPointe, who leads the Army’s Night Vision and Electronic Sensor Directorate’s anti-mine research, demonstrated a pistol-shaped air sniffer called “FIDO.”

FIDO is built around a polymer coating on the inside of a narrow tube. When exposed to light, the polymer generates its own glow. When exposed to nitro-aromatic compounds — particles commonly emitted by explosives — that glow blinks off.

In an explosive-free environment, FIDO’s audio output sounds like a Geiger counter. When explosives are present, FIDO screams. LaPointe demonstrated the machine’s sensitivity by holding an empty vial in front of it.

“At one point, I put a small spec of TNT in here, and then I pulled it out,” he says.

The remnants were enough to trigger a reaction — a strong one. LaPointe says these devices help soldiers find “targets of interest” in “areas of interest.”

Between the machine’s calibration and the soldier's training, they can tell the difference between harmless spent gunpowder and the very real threat of an improvised bomb.


[Music: "Green Eyes (Instrumental)" by Coldplay from A Rush of Blood to the Head]

Photos: FIDO

NPR

For More Local Turkeys To Hit Holiday Tables, You Need An Abattoir

Demand for locally raised birds is growing faster than small farms can keep pace with. One New England farmer is making a bold move to get more gobblers to the table.
NPR

For More Local Turkeys To Hit Holiday Tables, You Need An Abattoir

Demand for locally raised birds is growing faster than small farms can keep pace with. One New England farmer is making a bold move to get more gobblers to the table.
NPR

Obama: 'No Sympathy' For Those Destroying Ferguson

Saying he understands the frustrations of people who feel they're not treated fairly under the law, President Obama also said, "I have no sympathy at all for destroying your own communities."
NPR

Is Digital Learning More Cost-Effective? Maybe Not

Digital learning initiatives are spreading to schools across the country, but new research raises doubts about how well they work.

Leave a Comment

Help keep the conversation civil. Please refer to our Terms of Use and Code of Conduct before posting your comments.