A low impedance large surface diode

A low impedance large surface diode system with high purity graphite ring cathode and organic glass insulation is developed. The diode is optimally designed by using theoretical calculation and numerical simulation. Under the premise of ensuring the insulation safety, the axial length and the gap between the inner and outer canisters of diode are cut down to decrease the inductance of diode. The experimental result shows that the diode after optimal design works stably without breakdown at the voltage of 200 kV. The result with a max voltage of 213 kV, a current of 221 kA, a characteristic impedance of 1 , a current density of 8 kA/cm2 and an FWHM of 50 ns is achieved in the experiment.