Integration of an advanced sealed-tube neutron generator into a mobile neutron radiology system and resulting performance

Abstract The first DIANE ∗ neutron radiology system is being prepared for operation in the IABG laboratories in Ottobrunn (Germany). It utilizes a new D-T generator, designated GENIE 46, developed by SODERN (France) for this application. The generator is being integrated into an upgraded LTV-produced mobile neutron radiology system suitable for practical nonreactor inspection of components and structures. The maximum output of the present version of the GENIE 46 is 5 × 10 11 n s −1 (14 MeV) with less than 10 mA ion beam current at 225 kV. Tube lifetime at maximum output is approximately 500 h, while at 10 11 n s −1 the tube is designed for a lifetime of 1500 h. The geometry of the neutron tube, VHV connectors, ion source power supply, and cooling tubes comprises a cannister designed to be compatible with the 10-in. diameter opening in the LTV moderator/collimator assembly. 3-D Monte Carlo neutron/photon transport simulations of the new integrated radiology system operation have been performed by IABG. The calculations predict a thermal neutron flux at the collimator exit ( L D = 13) of φ th (0 ≤ E n ≤ 0.3 eV) = 1.2 × 10 5 n cm −2 s −1 . Comparisons of this value and other Monte Carlo results with actual performance will be made in the near future with the accrual of operational data.