在静电聚焦和磁聚焦的条件下,电子注特性的研究采用计算机控制能注分析器系统更为有效。该系统装有一带针孔的靶板和一个法拉第筒,作为探测组件取出电流密度样品。探测器可以三维移动,它是用一步进电机驱动平台。计算机通过数字输出脉冲链给电动机的驱动装置来控制电动机的运动。在适当的距离间隙,计算机触发高压脉冲发生器,接通电子束。法拉第筒截获的电流发送给积分运算放大器,该放大器产生一正比于电 Under the conditions of electrostatic focusing and magnetic focusing, it is more effective to study the electronic injection characteristics by using the computer controlled energy analyzer system. The system is equipped with a pinhole target plate and a Faraday cup, as a probe assembly to remove current density samples. The detector can be three-dimensional movement, it is a stepper motor drive platform. Computer through the digital output pulse chain to the motor drive to control the motor movement. At the appropriate distance, the computer triggers the high-voltage pulse generator and turns on the electron beam. The current captured by the Faraday cup is sent to an integrating op amp which produces a signal proportional to the current