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引言微通道板(MCP)是一个二次电子倍增器,由无数根微细玻璃管(道)排列熔合成约1mm厚的薄圆盘形器件。每根道内径约10～20μm,道内涂有一层适当电阻的二次电子发射材料,因此每道构成一个独立的二次电子倍增器。在MCP的两端加上直流电压,沿着道轴方向便产生电场。当一个电子进入道里打到道壁上便产生二次电子。这些二次电子,由于它们的初速度和电场加速成抛物线运动打到对面壁上又产生二次电子。这个过程沿着一根道反
INTRODUCTION The microchannel plate (MCP) is a secondary electron multiplier consisting of numerous thin glass tubes (lanes) arranged in thin disk-like devices fused to about 1 mm thick. The inner diameter of each lane is about 10 ~ 20μm. The inside of the lane is coated with a layer of secondary electron-emitting materials with appropriate resistance. Therefore, each lane constitutes an independent secondary electron multiplier. Applying a DC voltage across the MCP creates an electric field along the track axis. When an electron enters the road and hits the road wall, it produces secondary electrons. These secondary electrons, due to their initial velocity and electric field accelerating into a parabolic motion, hit the opposite wall and produce secondary electrons. This process goes down the road