P1.15: Optimization of the TWT Attenuators' Parameters

Electronic efficiency dependence on electron beam interaction with electromagnetic field in an attenuating section is analyzed in this paper. It's shown that said interaction leads to a significant decrease in TWT's efficiency. The possibility to increase electronic efficiency by an additional attenuator with relatively small attenuation is considered below. Formulas for optimum position and attenuations of both attenuators are derived.