Research of dealing EMI modes for 4×2 multisegment amplifier power system

The paper analyzes several EMI modes during the charging and discharging periods of the power system of the 4×2 multisegment amplifiers. In order to deal these EMI modes, the methods of grounding one terminal of the capacitor, single grounding of the whole power system, preionization shielding, optic fiber isolation and other measures were adopted. The whole system runs more safely, stably and reliably after adopting these measures．