Coaxial multi-gap multi-channel gas spark closing switch with low inductance and jitter

A coaxial multi-gap multi-channel closing switch with stainless steel spring ring gap is designed and investigated. The switch is triggered by a pulse applied to the cylindrical electrode outside the discharging channel through parasitic capacitance coupling. The jitter of the switch is reduced by several short distance gas gaps in series, and its inductance is reduced by multi-channel discharge. The switch chamber is filled with 0.3MP a N2 gas, and its operating voltage and conducting current are about 100kV and 200kA, respectively. The experimental results indicate that the switch is of low inductance (15～30nH), low jitter (～3ns), and stable breakdown performance.