1 (CRTI Project: RD) Explosive Vapors Standoff Detector – Multi-Option Differential Detection and Imaging Fourier Spectrometer (MoDDIFS)J.-M. Thériault, E. Puckrin, H. Lavoie, F. Bouffard and S. Désilets DRDC ValcartierPierre Caron, PM - Public Safety CanadaPublic Security S&T Summer Symposium 2009Ottawa, June 16-18, 2009
2 CRTI Project: 07-0179RD Explosive Vapors Stand-off Detector MoDDIFS CRTI Project: RD Explosive Vapors Stand-off Detector MoDDIFS* ProjectNeeds:Crime Prevention associated with Illicit Products Fabrication by Clandestine LaboratoryProject Objectives:To develop leading edge Infrared (IR) hyperspectral methods and sensing technology and optimize it for the standoff detection of explosive vapors and precursors.* MoDDIFS: Multi-options Differential Detection and Imaging Fourier Spectrometer
3 Outline of Presentation Introduction: Passive Standoff Detection of CWA Vapours:Differential detection approachCATSI* and CATSI EDMPassive Standoff Detection of Explosives and Precursors:Differential and imaging approachMoDDIFS sensor projectSpectral signatures of explosives and precursorsOption-1 for vapoursOption-2 for liquids and solids*CATSI – Compact Atmospheric Sounding Interferometer
4 Direct vs Differential Detection IR SpectroscopyDirect ApproachIRDifferential ApproachDifficult Problem ?Atmosphere EmissionBackground emissionImplies large clutter/signal ratioIR Hyperspectral SensingLWIR (7-13 mm)
5 Differential FTIR Spectroscopy with CATSI* Novel Sensing ApproachDouble-beam FTIR SpectroscopyOptimized for real-time background suppressionMilestonesDevelop CATSI instrument ( )Detection algorithm ( )Int`l Trials: Short (0.1 km), mid (1.5 km) and long (5.7 km) ranges ( )* CATSI - Compact ATmosphericSounding InterferometerRef FOVTarget FOVCloudIR Hyperspectral SensingLWIR (7-13 mm)
6 IR Signatures of CWAs:Example of CWAs IR spectral signatures
7 Autonomous detection of CWA simulants at 3 and 5 Km ranges Differential Detection Sensor Development: CATSI Engineering Development ModelCATSI EDMDevelopment:Militarized for CFMilestone (Sep 2008):Autonomous detection of CWA simulants at and 5 Km rangesThe approach used by our group at DRDC Valcartier in the last decade is known as CATSI, for compact atmospheric sounding interferometer.It’s not that big, would you say, until you have to move that massive tripod or the computing and power racks.The unique feature of this sensor is that it has two inputs. You point one towards a possible target and the other towards a reference point having a similar background, and the instrument measures the differences between the two. It’s not a computed difference; it’s a real-time optical interferometric effect that simply causes the sensor to record the difference between the two fields of view.
8 CRTI Project: 07-0179RD CATSI Imager: MoDDIFS* (New Generation) Program:CBRNE Research and Technology Initiative (CRTI)MoDDIFS(CATSI Imager)Project Objectives:Standoff detection and identification of illicit products fabricationPrimary: Explosives and PrecursorsParallel: CWAs, Drugs, IEDsPartners/End Users :- Defense R&D Canada- Public Safety Canada- Royal Canadian Mounted Police (RCMP)- HAZMAT Division - Montreal- Montreal Port Authority - Port of Montreal- Montreal Advisory Committee on Antiterrorism- Industries: Telops, AEREX?Gas DetectionStart-End: /08 to 2011* MoDDIFS: Multi-Options Differential Detection and Imaging Fourier Spectrometer
10 Explosives and their Precursors CompoundsMaterial ClassDetectable PhasePotentialDetectionScenariosSpectral SignatureTATPExplosiveVapor/SolidYES*Leak/SpillYESHMTDMAYBE #To be determinedNGVapor/LiquidEGDNTNTSolidSpillRDXPETNAN-FO?NOChlorates**MAYBE*Nitric acidPrecursorHydrogen peroxideAcetoneVaporHexaminePowderLIKELY*GlycerineLiquidLIKELYEthylene glycolLiquid/VaporEthylene oxideDiesel fuelNo in LWIRLeakMaybe In 3-5 micron bandMEKP
11 Gas Signatures Detection Scenarios: leaking windows leaking doors chimneys, vents
17 MoDDIFS Option-2: Polarization for Liquids and solids Main optical specifications: Telops (main Contractor)FOV
18 CRTI Project: 07-0179RD Project Summary / Phases PHASE I – Spectral Signatures : Identification of the IR spectral signatures of explosive and their precursors (completed June 09)PHASE II – System Specifications and Prototype Construction: Development of system specifications, detection algorithm and construction of the MoDDIFS prototype. (completed Aug 2010)PHASE III – System Validation and Testing: Verify, validate, optimize the MoDDIFS prototype throughlaboratory experimentationsopen air trials under realistic scenarios recommended by end users. (completed - July 2011)
19 ? Potential Applications for Detection & Identification MoDDIFS Vapours (2nd generation)TICsLiquid contaminants & spills SurfacesSuicide bomberVapours (2nd generation)CWAExplosives IEDsExplosivesPowdersLiquid aerosolscontaminantsIllicit explosive and drug fabrication
21 Differential Spectroscopic Techniques Existing and Potential Standoff Explosives Detection TechniquesCommittee on the Review of Existing and Potential Standoff Explosives Detection Techniques, National Research Council,The National Academies Press, 148 pp., Washington, D.C., 2004Download free sample PDF :Important recommendation stated:“Research in the IR spectral range is needed to study the spectroscopic properties (e.g., thermal emissivity versus wavelength) of human skin, clothing, and other relevant materials. This information might lead to differential spectroscopic techniques that could improve IR imaging for explosive detection”.