Pyroelectric crystals have been known as portable particle accelerators for more than a decade. With a single 10 mm thick × 30 mm diameter LiTaO3 z-cut pyroelectric crystal, we have produced a dual-energy electron beam with energies of 120 keV up to 190 keV without need to any enhancement of electric field. The dual-energy beam is achieved using a low-density polyethylene chamber surrounding the crystal. The chamber is designed and fabricated to trap the emitted electrons from the crystal's surface. The created electric field by the trapped electrons produce an electron beam with a different energy. Moreover, using the chamber around the crystal mitigate the electrical breakdown on its surface and, therefore, the accelerator's potential is increased.

In this study, the Geant4 toolkit is utilized to present a new approach for simulation of the D-T interaction. The neutron production cross-section and the energy/angle distribution of neutrons produced as the D-T data libraries are incorporated in the Geant4, and their performance is evaluated. The spectra shape of the produced neutrons of the D-T interaction simulated by the Geant4 show good agreement compared to the results of the comparative codes (i.e. MCUNED, ENEA-JSI, and DDT). However, some differences are observed, especially, in angular range of 90–95 degrees. The reason for these differences as well as the results of the proposed approach in comparison with the results of the benchmark experiments as the next study are under consideration.

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