A chopping system of a tandem accelerator based on two pairs of parallel plates is investigated. The first chopper operating at 37.5 MHz cuts off the tails of the bunched beam and the second, at a lower frequency of 4.6875 MHz, eliminates the satellite low intensity pulses. The experimental procedures for measurement of the performance of a chopping system including a Beam Profile Monitor (BPM) technique and a pulsed beam diagnostic monitor are described. The results of simulations and experimental observations are presented. An analytical technique to reconstruct the real profile of deflected beams from the profile measured with a BPM is discussed in detail. Theoretical and experimental data on the chopper scanning window are presented. An analyses of the factors limiting the chopping system performance is conducted and technical solutions to overcome it are discussed.

研究了基于两对平行板的串联加速器的斩波系统。第一个以37.5 MHz运行的斩波器切断了束状光束的尾部，第二个以4.6875 MHz的较低频率消除了卫星的低强度脉冲。描述了测量包括光束轮廓监视器（BPM）技术和脉冲光束诊断监视器的斩波系统性能的实验程序。给出了仿真结果和实验观察结果。详细讨论了一种从BPM测量的轮廓重建偏转光束的实际轮廓的分析技术。给出了斩波器扫描窗口上的理论和实验数据。