Development Of A New Synchroscan Tube Incorporating A Microchannel Plate

In the development of synchroscan tube operated over wide sweeping frequency, multi-pactor discharge which increases back ground noise of the tube, has been investigated in detail. It has been found that the problem of discharge can be solved mainly by suppressing the secondary electron emission from the electrodes in the deflecting section in the tube. On this result, a new synchroscan tube has been developed. This tube can be operated over wide sweeping frequency from 80MHz to 160MHz and the limiting time resolution of the tube itself of about 8ps has been obtained at 80MHz. Driving the tube in synchroscan mode is very easy because the tube has high deflection sensitivity, 50mm/kVp-p. Moreover, this tube incorporating a microchannel plate(MCP) is very high sensitive, by adding the effect of synchroscan mode.