Abstract: To study system-generated electromagnetic pulse(SGEMP) produced by complex model, a 3D particle in cell (PIC) code is exploited. A function module is appended to characterize cosine angular distribution and exponential energy spectra of photoelectron. For validation, external SGEMP effects induced by photoelectrons emitted from cylinder top surface is simulated and are compared with those by 2D code from literature. Subsequently, external SGEMP effects induced by photoelectrons emitted from half-side surface of a cylinder are studied. It shows that intense of electric field could get 56 kV·m^-1 and magnetic field is 3.0×10^-6T as emitting current is 3.3 A.

Key words: PIC code, system generated electromagnetic pulse, angular distribution, nuclear hardening