Large-format pulse-dilation framing tube with 5 1p/mm spatial resolution

摘要

A pulse-dilation framing tube consisting of a pulse-dilation device, a magnetic lens imaging system, and a microchannel plate (MCP) imager is reported. Three are three photo-cathodes coated with 80 run Au on a 90 nun diameter C8H8 film. And a sensitive area with diameter of about 60 mm is achieved. The magnetic lens imaging system images the photoelectrons from photo-cathode (PC) onto MCP with the image ratio of 2:1. The spatial resolution of the pulse dilation framing tube is measured, which is about 5 1p/mm. Furthermore, the spatial resolution will be worse with the increasing off axis distance.