Neutron Imaging Camera

We describe the Neutron Imaging Camera (NIC) being developed for the detection of special nuclear materials by NASA/GSFC and NSWC/Carderock. The NIC is a self-contained, robust, omni-directional and ³He-independent neutron detector based on the Three-Dimensional Track Imager (3-DTI) technology developed at GSFC for gamma-ray astrophysics applications. The 3-DTI is a large volume time-projection chamber that provides ~ 0.4 mm resolution for the 3-D tracking of a charged particle. The incident direction of fast neutrons, 0.1 MeV <; E_n <; 10 MeV, are reconstructed from the momenta and energies of protons resulting from single and double scatters on methane (CH₄). We present angular and energy resolution of the NIC derived from laboratory and accelerator testing.