变象管、双近贴象增强器及带微通道板光电倍增管的快门选通电路

本文主要简介我国变象管、双近贴象增强器毫微秒分幅相机的研制现状,并讨论这些相机的快门脉冲发生器电路。同时还介绍了用于带微通道板光电倍增管的选通电路。这些电路作适当修改后可用于微光硅靶摄象管的控制,高压电器特性试验,毫微秒脉冲源以及激光调制等场合中。

THE SHUTTER STROBE CIRCUITS USED FOR IMAGE CONVERTER TUBES DOUBLE-PROXIMITY IMAGE INTENSIFIERS AND PHOTOELECTRIC MULTIPLIERS WITH MICRO-CHANNa PLATE

This paper mainly deals with the starus quo of the development of nanosecond (ns) framing cameras for image converter cameras, double-proximity image intensifier cameras in our country, and their gate pulse generator circuits. The mixing circuit which consists of avalanche transistor series and pulse chyratron has a short trigger delay time (<14 ns) little trigger jetter (<±500Ps) and anti-interference ability (in strong electromagnetic field), It provides 550V of pulse amplitude, 2.5ns of rising edge, ≤4.5ns of falling edge and 15 ns-several hundred ns of pulse width. The shortest frame spacing is 150ns. The circuit with all avalanche transistor series and rapid restorer diode is used for a new version image converter tube being not strict with gate pulse wave. The image converter tube has 10 ns of the pulse width, 50 ns of frame spacing and 300V of output pulse amplitude.In order to achieve high framing rate for image converter cameras, a gate circuit for a trichannel double-proximity image intensifier camera has been successfully designed, based on developing of the double proximity image intensifier camera. Its shortest expo-sure time is 2 ns; the shortest frame spacing is 2 ns; the dynamic resolution of the camera is better than 5lp/mm.The ns pulse gate circuit used for MCP-PMT provides 30 kc(max) of synchronous frequency in the range determined by source power and pulse width, 200-300 V of adjustable output square-wave pulse amplitude, 2-40 ns of optional pulse width,≤2.5ns of pulse rising edge, ≤3.8ns of pulse falling edge.By having been improved slightly, these circuits described above can be used for controlling low-light silicon target pick-up tubes, for tesing high-voltage instantaneous characteristics for ns pulse source and laser modulation.