Pulsed bremsstrahlung from the Hermes-III generator1 produces photofission for research in Intense Pulsed Active Detection (IPAD)2. Hermes-III is operated in three modes producing bremsstrahlung with different endpoint energies: 8, 12, and 16 MeV, all with 30 ns x-ray pulse width. The electron-beam current increases with output voltage, from 300 kA at 8 MV to 600 kA at 16 MV. Previous experiments3 demonstrated detection of delayed neutrons from fissions induced in a depleted uranium (DU) plate. The work reported here focuses on detecting prompt fission neutrons, which are about 100 times more numerous than delayed neutrons.