Experimental study on discharge characteristics of a subnanosecond high pressure N2 switch

Experimental study on discharge characteristics of high pressure subnanosecond N2 switch was carried out by using a high voltage nanosecond generator in the article. The results show that when N2 pressure ranges from 3 to 10 MPa and gap distance ranges from 0.6 to 1.2 mm, the breakdown voltage of N2 gap increases as N2 pressure and gap distance increases, and saturates as N2 pressure increases. The highest breakdown electric field is about 2 MV/cm. The rise time of the output voltage of the high pressure subnanosecond N2 switch ranges 145~190 ps, and decreases as N2 pressure and gap distance increases.