1. The Bernard M. Gordon Center for Subsurface Sensing and Imaging Systems
BomDetec: Wide Area Surveillance and Suicide Bomber Detection at Greater than 10 Meters
Carey Rappaport
Northeastern University

2. BomDetec Team
Integrated Defense Systems

3. Basic Detection Geometry
Layered detection within a single package:
Intelligent Video
mm-wave Radar
X-Ray Backscatter
THz Spectroscopy
Radar 50m
Video 100m
X-Ray 10m
THz 10m
Video
Radar
X-Ray
Thz
Pedestrian Paths
ZBV

4. Proposed AS&E Z - Backscatter Van with Sensor Layout and Coverage
PTZ Cameras
X-ray Beam
Side View
Terahertz Beam
Radar Beam
Top View

5. SCR Technology: Automatically Detect and Track Individuals
Siemens Corp. Res.: Intelligent Video
SCR Technology: Automatically Detect and Track Individuals
Current work: extend this technology to allow camera hand-off, long term tracking of individuals

6. 77 GHZ Radar Detection: Raytheon, PPT, NEU
50m range
High resolution at 4mm wavelength
Single human illumination
Ave. width of person: 0.5m
Beamwidth: 0.6 deg.
Detect people / distinguish hazards through clothes

7. AS&E X-Ray Backscatter Detection
X-Ray Backscatter image Showing Organic / Inorganic Objects
Chopper Wheel for Generating X-Ray Fan Beam

8. Explosive THz Absorption Spectra-- RPI
240
240
HMX
RDX
180
180
1.96THz
1.8THz
0.82THz
a (cm-1 )
a (cm-1 )
120
120
1.5THz 60 60
0.5
0.8
1.2
1.6
2.0
2.4
0.5
0.8
1.2
1.6
2.0
2.4
Frequency (THz)
Frequency (THz)
1.6THz
1.6
2.0
2.4
0.5
1.2
0.8
2.2THz
TNT 80 60 40 20
a (cm-1 )
160
PETN
2.0THz
120
a (cm-1 ) 80 40
0.5
0.8
1.2
1.6
2.0
2.4
Frequency (THz)

9. Non-Explosives Absorption Spectra: Distinct from Explosives Spectra
Frequency (THz)
1.6
2.0
2.4
0.5
1.2
0.8
Sugar
240
180
120 60
Detergent
a (cm-1 ) 30 60 90
120
L-Leucine
Frequency (THz)
0.84THz
2.1THz
0.8
1.2
1.6
2.0
2.4
0.5
a (cm-1 )
1.6THz
1.6
2.0
2.4
0.5
1.2
0.8
Frequency (THz)
a (cm-1 )
120 90 60 30
150
Dimethoate
1.05THz
1.9THz

10. Overall Suicide Bomber Detection Strategy
Track individuals: identify suspicious movement (Video)
Detect anomalies under clothing at distance (Radar)
Image object under clothing at medium distance (X-Ray)
Analyze chemical characteristics at medium distance (THz)