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The Nuclear Science and Instrumentation Laboratory (NSIL) is currently establishing a Neutron Science Facility (NSF) based on two compact neutron generators: Deuterium-Deuterium (DD), resulting in 2.45 MeV neutrons, and Deuterium-Tritium (DT), resulting in 14.1 MeV neutrons, with maximum source intensities up to 5 × 106 n/s and 4 × 108 n/s over 4π, respectively. Neutron/X-ray radiography and tomography are two of the applications the NSF will be equipped with. In this paper, we report the state of the radiography and tomography system, and the neutron/X-ray radiography and tomography experiments we performed. Good radiographs and tomographs are obtained with X-ray. The spatial resolution of the X-ray radiography system is measured to be about 0.1 mm. The thermal neutron radiographs and fast neutron radiographs have proved that the DD neutron generator will be beneficial to demonstrate neutron radiography capabilities for educational purposes. Additionally, the detail of the collimator optimization of the DD neutron radiography was presented.

Alumina ceramics are widely used as high-voltage insulation material due to its good electric insulation. As we all know that the defects inside the ceramic have great impact on the insulation property of the ceramics, especially the pores. For a better understanding of the effect of the pores, we carried out the fundamental study of how the pores affect the electric field distribution inside alumina ceramics by simulation and theoretical analysis. The results showed that the electric field strength inside the pore is higher than that without any pores inside the ceramic and the increased proportion is almost constant which is not relative to the size and location of the pore.