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Active Denial System 2

Definition/Scope: Active Denial System 2 is an enhanced, ruggedized version of the initial active denial capability that Raytheon built for the Air Force under the Office of the Secretary of Defense's Advanced Concept Technology Demonstration program. The Active Denial System emits a focused beam of millimeter wave energy that penetrates the skin to 1/64th of an inch, producing an intolerable heating sensation that causes targeted individuals to flee. The Advanced Concept Technology Demonstration program has conducted extensive human effects safety testing and extended user evaluations in field conditions. The system is intended to protect military personnel against small-arms fire, which is generally taken to mean a range of 1,000 meters. The system is described as having a range of 700 yards. Active Denial Technology uses a transmitter to send a narrow beam of 95-GHz millimeter waves towards an identified subject. Traveling at the speed of light, the energy reaches the subject and penetrates less than 1/64 of an inch into the skin, quickly heating up the skin's surface. The 95-GHz energy penetrates 1/64 inch into the skin and produces an intense burning sensation that stops when the transmitter is switched off or when the individual moves out of the beam. Within seconds, an individual feels an intense heating sensation that stops when the transmitter is shut off or when the individual moves out of the beam. According to reports, a 2-second burst from the system can heat the skin to a temperature of 130° F. At 50 °C, the pain reflex makes people pull away automatically in less than a second. Someone would have to stay in the beam for 250 seconds before it burnt the skin. Despite the sensation, the technology does not cause injury because of the low energy levels used. It exploits a natural defense mechanism that helps to protect the human body from damage. The heat-induced sensation caused by this technology, is nearly identical to the sensation experienced by briefly touching an ordinary light bulb that has been left on for a while. Unlike a light bulb, however, active denial technology will not cause rapid burning, because of the shallow penetration of the beam and the low levels of energy used. The transmitter needs only to be on for a few seconds to cause the sensation.

Used For:


Broader Terms:

Active Denial Technology
Bradley Fighting Vehicle
Infantry Fighting Vehicle

Narrower Terms:

riot control

Related Terms:

Active Protection System
Iron Fist Active Protection System
Joint Non-Lethal Weapons Directorate
Manned Ground Vehicle
Marine Corps Base Quantico

CALL Homepage >> Thesaurus Last Updated: Sept 17, 2008