MAIN OPERATING PARAMETERS OF THE GAS SWITCH Fig. 3. Scheme of the trigger generator based on a pulse transformer. TABLE I Fig. 2. 3-D perspective of a two-electrode spark gap switch. Fig. 1. Schematic of a two-electrode spark gap switch. Fig. 4. Output triggering voltage waveform (open circuit). Fig. 5. 3-D coordinate axis of a two-electrode main switch. Fig. 6. Force diagram along the Z-axis of a graphite electrode surface. distribution of ZL; can be calculated by the formula of finite- length parallel wires where wo is the free space permeability, 7 stands for the current through the wires, d denotes the distance between the two wires, and L is the length of wire. According to the actual situation, Lj = Lo =-:---: = Lg = 20 cm, dj2 = 5 cm, d13 = 10 cm, d\4 = 15 cm, dis = 20 cm, d16 = 25 cm, d\7 = 30 cm, and dig = 35 cm. Therefore, f; is calculated. The maximum force of wire L, is at the center of the cable and the value is 53 KN. The high value of the connecting wires will cause vibration of the whole gas switch. 700 kA-CURRENT EXPERIMENTAL RESULTS Fig. 11. Typical discharge current waveform across the gap switch. Fig. 10. Real main testing circuit of a 1.2-MJ PPS module. Fig. 9. Test circuit for the switch-trigger system. Fig. 8. Gas switch assembled by FRP rods of external wedge type.
