我说得就是reed switch Switch rise time of industry standard reed switches is typically around a ns. However, state of the art switches exist which produce 50 ps rise time, 20 kV pulses [11]. The faster rise time is a result of optimized gas and gas pressure parameters. One drawback of the higher voltage switch is the increase in physical size, which limits the repetition rate. For example, the 20-kV switch has a maximum repetition rate of 120 Hz.