A light weight, compact 1.4 MV tandem accelerator is being constructed as part of a transportable neutron radiography system. A maximum current of 400 μA of 2.8 MeV deuterons on the beryllium target is expected to produce a primary neutron source of 8 × 10 11 ns −1. The accelerator system uses multiple belts, a surface plasma negative deuterium ion source, a differentially recirculated terminal stripper, an aluminum pressure vessel, and isolated belt columns. A compact neutron moderator-collimator design is discussed. The radiography system is being designed for the inspection of aircraft. The elements of the system which must be positioned for the radiography (accelerator, moderator, collimator, and real-time imaging system) will have a mass of less than 1150 kg.