Results with the neutron scatter camera

We present results from recent deployments with the neutron scatter camera. We successfully detected and pinpointed a hidden
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Cf neutron source in a large ocean tanker at Alameda, CA. In a lab study we detected a
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Cf neutron source at a stand off distance of about 100 ft. We measured the integral flux, differential flux and angular distribution of cosmic neutron background in the fission energy range 0.5–10MeV at Alameda, CA (sea level), Livermore, CA (570 ft), Albuquerque, NM (5300 ft) and Fenton Hill, NM (8630 ft). The neutron backgrounds are relatively low, uniform and well understood. We recently increased the camera effective area 3x. The camera has been successfully ruggedized, deployed to various locations and has performed various measurements. Our results are encouraging and suggest fast neutron imaging could be a useful tool for the detection of special nuclear material (SNM).