微通道板探测器集成定时放大器设计

Design of an Integrated Timing Amplifier for MCP Detectors

设计了一种可集成于微通道板探测器内部的定时放大器,可直接从微通道板探测器的高压供电电路或阳极上获取信号,进而给出探测事件的时间信息。该电路由跨阻放大器实现电流-电压转换,并由后续的两级线性放大电路对该电压信号进行放大。测试显示该电路的定时精度为653 ps,飞行时间测量精度为2.1ns,可以满足大部分实验对定时精度的要求,如反应事件的符合测量和飞行时间测量等。

We develop a timing amplifier,which can he integrated into MCP detectors.It gets input from the high-voltage circuit or the anode of the MCP detector,and gives the particle timing information.It consists of a transimpedance circuit,which converts the input current signal to the output voltage signal,and two linear voltage amplifier circuits*which amplify the voltage signal to a certain level to feed the constant fraction discriminator.The timing precision of the current amplifier reaches 653 ps,and the time-of-flight measurement precision reaches 2.1 ns in the test.This satisfies the timing requirements of most MCP detector applications,e.g.,in coincident measurements and TOF measurements of reaction events.