Leidos eyes active infrared spectroscopy chemical detection for weapons, poisons, narcotics

WRIGHT-PATTERSON AFB, Ohio, 4 Feb. 2016. Sensors experts at Leidos Inc. in Reston, Va., are developing a lightweight battery-operated chemical detection system that detects explosives, chemical weapons, poisonous chemicals, and narcotics using active infrared spectroscopy.

Leidos eyes active infrared spectroscopy chemical detection for weapons, poisons, narcotics
Leidos eyes active infrared spectroscopy chemical detection for weapons, poisons, narcotics
WRIGHT-PATTERSON AFB, Ohio, 4 Feb. 2016. Sensors experts at Leidos Inc. in Reston, Va., are developing a lightweight battery-operated chemical detection system that detects explosives, chemical weapons, poisonous chemicals, and narcotics using active infrared spectroscopy.

Officials of the U.S. Air Force Research Laboratory at Wright-Patterson Air Force Base, Ohio, announced $17.9 million contract to Leidos on Wednesday for the Standoff Illuminator for Measuring Absorbance and Reflectance Infrared Light Signatures (SILMARILS) project.

The Air Force Research Lab is awarding the contract to Leidos on behalf of the U.S. Intelligence Advanced Research Projects Agency (IARPA) in Washington. IARPA is the research arm of the Office of the Director of National Intelligence.

The contract calls for Leidos experts to develop a portable system for real-time standoff detection and identification of trace chemical residues on surfaces using active infrared spectroscopy at a 30 meter range.

Standoff chemical detection is a ubiquitous need across the intelligence community for applications ranging from forensic crime scene analysis to border and facility protection to stockpile and production monitoring, IARPA officials say.

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Current systems, however, do not provide the sensitivity, specificity, and low false-alarm rates necessary to detect trace chemicals of interest in a cluttered, real-world environment.

Goals of the SILMARILS program include high chemical sensitivity and specificity across a broad range of target classes; effective operation amid gas phase and surface-adsorbed clutter, varying substrates, temperature, humidity, and indoor and outdoor background light; an eye-safe system with a visually unobservable illumination beam; portable size and power draw for limited-duration battery operation; and a rapid scan rate.

The key overarching objective of the SILMARILS program is not just to develop a spectrometer that can produce high-resolution infrared spectra in the laboratory, but also to develop a system that can identify target chemicals in the field with real-world clutter and background.

Leidos experts will develop physical spectrometer hardware and detection and discrimination algorithms that detect nitro-based compounds such as TNT and RDX, acetone peroxide, and home-made explosives such as fertilizer bombs; chemical weapons such as sarin or tabun, as well as toxic chemicals that may be intentionally or unintentionally released such as hydrogen cyanide or ammonia gas; and illicit drugs such as cocaine, heroin, or methamphetamine, or legal but abused drugs such as Vicodin or hydrocodone.

IARPA officials also would like the Leidos instrument to detect compounds associated with the manufacture and deployment of biological agents and nuclear materials.

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Leidos experts will investigate coupling broadband coherent sources with interferometric spectroscopy in wavebands like long wave infrared (LWIR), mid-wave infrared (MWIR), and short-wave infrared (SWIR).

The job involves creating tailored algorithms and specific background and clutter filter approaches; understanding how surface and particle effects influence spectral signatures; designing an optical train from existing and purpose-developed component technology; and developing a prototype for field testing.

On this contract Leidos will do the work in Reston, Va., and should be finished by October 2020. Additional contractors may be selected for the SILMARILS project, IARPA officials say.

For more information contact Leidos online at www.leidos.com, IARPA at www.iarpa.gov, or the Air Force Research Laboratory at www.wpafb.af.mil/AFRL.

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