Development of inner prepulse restraining inductance of accelerator

The prepulse restraining inductance was confirmed to be 5 μH according to the numerical simulation based on the relation of pulse transmitting line voltage, pulse outer line voltage and diode current with inductance value. The method for calculating the large-scale sparse inductance inside a shield was put forward by experimental study. The inductance with length of 630 mm, the coil of 1160 mm in diameter and the inductance pipe of 102 mm in diameter were confirmed according to the simulated electric field between the inductance and the inner shield of PTL and windings. By numerically simulating the equivalent circuit of spiral water PTL composed of inductance and inner shield, the transmitting time of 349 ns was obtained, which was larger than the half -peak breadth of main pulse. During the main pulse, the impedance of the spiral water PTL is more than 25 Ω, which was also larger than that of PTL. The trigger high voltage and operating gas were introduced through inductance pipe to gas switches.