六级杆离子传输系统射频电源控制设计

Development of Radio Frequency Power Supply Control for Hexapole Ion-guide System

设计一种基于AB类推挽功放原理的射频线性电源,可调频率为1~6 MHz,电压≥900 V。由ARM控制器通过检波电路检测输出峰峰值构成闭环控制来稳定输出电压。通过串口设定输出频率、电压以及实时显示电压。实验测得1.420 MHz、3.086 MHz和5.347 MHz输出电压分别为2020 V、1960 V和928 V;在3.094 MHz测得电压和频率稳定性分别为0.44%和0.096%。该电源已用于质谱仪射频六级杆离子传输且运行稳定。

A radio frequency linear power supply based on the principle of class AB push-pull power amplifier is developed.Its adjustable frequency range is 1~6 MHz,and its output RF voltage is not less than 900V.The ARM controller is used to detect the output peak-to-peak value,and formed a closed-loop control to stabilize the output voltage.The output frequency,voltage,and real-time display voltage are set via the serial port.When the resonant frequencies are at 1.420 MHz,3.086 MHz and 5.347 MHz,the output voltage peak-to-peak values with the opposite phases are 2020 V,1960 V and 928 V,which meet the voltage and frequency requirements of the RF hexapole ion-guide.The measured voltage and frequency stability at 3.094 MHz are 0.44%and 0.096%,respectively.This RF power supply is stable,it can be used for the RF hexapole ion-guide.