Triggered vacuum gaps

摘要: Characteristics of a sealed vacuum gap are described and the difficulties encountered in applying this as an overvoltage protection device discussed. It is shown how these can be ameliorated by use gas-free electrode materials triggering when breakdown required. Several methods discussed some practical devices that inject minute quantities ionized hydrogen into gap. The eventually recovered titanium hydride getter. accomplished less than one-tenth microsecond first producing glow discharge rapidly transformed metal-vapor arc. Properties arc which have effect on characteristics A number sealed-off triggered gaps illustrated. These used to carry capacitor currents 60-cycle power line for ½ cycle. operating voltage range from few hundred volts 100 kV. advantages over gas-filled given switching applications listed.