Features:

  • Imaging/spectroscopy system for fast neutrons and gamma rays
  • Portable, rugged system allows standoff imaging in the field
  • Easy to transport and set up
  • Sources localized to ±3º and overlaid on optical camera image
  • Tablet-based graphical user interface
  • Spectroscopy differentiates between source types (e.g., SNM vs. medical isotopes)
The FIND instrument draws on the University of New Hampshire’s decades of experience in MeV neutron and gamma-ray detection, spectroscopy, and imaging. Imaging and spectroscopy are achieved using the double scatter technique. A fast neutron or gamma-ray scatters within one detector volume, and subsequently interacts in a second detector volume a short distance away. Straightforward kinematic calculations allow us to compute the scattering angle Φ, and therefore to constrain the incident radiation to a cone. Multiple (> 20) intersecting cones allow FIND to localize sources of MeV neutrons and gamma rays within ±3º. The angular resolution is ~13º. The neutron and gamma-ray images are overlaid on a visual image captured from a co-aligned camera.
FIND uses modern organic scintillators and silicon photomultiplier readouts:
  • Fast, efficient detection with excellent neutron/gamma-ray discrimination
  • Compact, rugged, low-voltage (~30 V) operation

Specifications
Components: 2 Layer Cases
1 DPU Case
Alignment Frame
8″ Samsung Galaxy Tab S2 Cables
Dimensions: Cases:18.5″ × 14″ × 7″ Frame: 23.5″ × 20″
Weight:Each case: 25 lbs
Power Supply:29 V DC 2 BB-2590 Li-Ion Batteries
Power:67 W (2.3 A @ 29 V)
Battery Life:8 hours
Operating Temp:0º C to 40º C
Setup Time:5 minutes
Optical FoV:80º Horizontal
60º Vertical
Radiation FoV:~160º (bi-directional)
Angular Resolution:~13º (FWHM)
Angular Precision:±3º
Energy Range:Neutrons: 1 - 20 MeV
Gamma Rays: 0.3 - 10 MeV
Energy Resolution:Neutrons: ~25% (FWHM)
Gamma Rays: ~50% (FWHM)
Display:Webpage-based GUI
Tablet Comm:WiFi
Other Comm:Ethernet port

About UNH

The University of New Hampshire’s Space Science Center (SSC) has over 50 years’ experience studying MeV neutrons and gamma-rays, including NASA’s OSO-7, SMM, and CGRO missions, and the DTRA-funded NSPECT neutron camera.

About SwRI-EOS

SwRI-EOS is a department of Southwest Research Institute (SwRI) co-located with SSC on the UNH campus. SwRI is a nonprofit R&D organization with decades of experience in engineering and largescale project management.
University of New Hampshire • Morse Hall • 8 College Road • Durham, NH 03801 • USA
Dr. Peter F. Bloser • peter.bloser@unh.edu • +1 603-862-0289 • http://www.eos.sr.unh.edu
Jason Legere • jslegere@unh.edu • +1 603-862-2756
SwRI-EOS • Morse Hall • 8 College Road Durham, NH 03801 • USA
Dr. Mark McConnell • mark.mcconnell@swri.org • +1 603-862-2047 • http://swri-eos.sr.unh.edu