High-speed shutter tubes of biplanar and proximity focusing design: Improvements through introduction of a microchannel wafer

Characteristics of several diode shutter tubes, useful for exposure time of 1 ns to 500 ns, are given. Addition of a microchannel electron multiplier between photocathode and screen makes possible higher and adjustable gain while retaining the advantages of high speed, small size, and high resolution. The transfer technique for making the photocathode and positioning it close to the microchannel wafer contributes to the performance of these new tubes.