多能量档电子直线加速器用栅控电子枪电源研究

本文介绍了一种应用于多能量档电子直线加速器栅控电子枪的专用电源。根据栅控电子枪的工作需求，电子枪的阴极处于-50 kV高压上，电源的3路输出，包括灯丝电源、偏压电源和栅控脉冲电源，均通过高压隔离变压器，将信号输送到高压端的灯丝、阴极和栅极上。利用主控计算机精确调节了电子枪发射束流的大小和脉冲宽度，以满足加速器多能量输出的需求。高压端均为无源器件，以降低故障率。此电源结构简单、调节方便、工作稳定，已在多能量档电子直线加速器上连续工作近4 a，运行状态良好。

Study on Power Supply for Grid-controlled Electron Gun of Multi-energy Electron Linac

In this paper, a special power supply for the grid-controlled electron gun of the multi-energy electron linac was introduced. According to the working requirement of the gridcontrolled electron gun, the cathode of the electron gun is at high voltage of -50 kV. The three outputs of the power supply, including filament power supply, bias power supply and grid-controlled pulse power supply, are respectively transmitted to the filament, cathode and grid electrode, which are all at high voltage, through the high voltage isolation transformer. The size and width of electron gun beam were adjusted accurately by computer to satisfy the requirement of the multi-energy output of the accelerator. High voltage terminal devices are all passive to reduce the failure rate. The power supply with simple structure, convenient adjustment and stable operation, has been normally working continuously on the multi-energy electron linac for nearly four years.