Damavan-imaging reconstruction demonstration


Neutron activation & fissile materials

Our camera can’t detect directly the weak lines of 235U (185 keV) or Plutonium. Any way they are often shielded by containers and swamped in the background. But fissile materials (235U, 241Am, Plutonium…) emit neutrons . Those neutrons are captured in their surrounding and emit prompt gamma rays that we detect well.

High count rate acquisition

Our camera can be used in the standard mode till 1mSV/h.  At those high count rate, the acquisition time should be short although: you can get 22.000 events in 10 seconds! We have also identified a mode allowing to use our camera at 6msV/h or even 10 mSV/h. This requires a specific hardware and must be specified in your order. On the image below you […]

Homeland security and wastes management

Container  with a roughly 1 MBq 60Co source seen from 3m (30’ image)

High quality gamma Imaging

The unique gamma image of 2 60Co sources obtained by Temporal V3: 2 60Co sources in the lab with a large intensity contrast (1 to 8) are clearly separated with an angular separation of 10° ;Activity of the main source 300 kBq ;Distance to main source = 0,8m ;Acquisition duration 1h (in order to get > 500 photons from the weakest source) ;Threshold = 14% […]

Imaging of heavily shielded sources

With our Compton Camera, thanks to it’s high spatial resolution and good signal/noise ratio, it is possible to image heavily shielded sources. In this case we are observing a high activity (1GBq) ¹³⁷Cs source used for level gauging. The source is shielded by 20 cm of lead. In 10 minutes using the 80 photons on a total 20.000 selected on the ¹³⁷Cs peak (662 +/- […]

Wall contamination mapping using a binocular camera

The binocular camera with its dual head configuration allows to estimate the true distance to a radiative source using gamma emission triangulation. This opens the way to quantitative imaging of contamination. A first trial has been done in a decommissioned power plant. The maximum activity on the wall was 0,2uSV/h (red spot). The gamma FOV (76°) is slightly smaller than the optical image (90×90). The […]

Natural radioactivity imaging

Our camera has such a good Signal/noise that it can image objects using their natural radioactivity. Here is an image of a plate of standard glass done with a pose of one day This view is done using the gamma lines from Actinium 228 from Thorium 232 decay chain. Thorium is an impurity in sand. The second image is done using the 1460 KeV gamma […]

Room contamination census using Binocular camera (360°)

Our camera can be used on a rotating tripod to create a panoramic 360° view of a room to track contamination and estimate dosimetry with minimum manpower involved. The complete scan solution has been developed in collaboration with SBS interactive with the help of Grand EST region. This view has been obtained in Daher waste reprocessing plant in France. The Image was obtained with all […]