Tri-Aperture Dissector Readout Device

摘要

The purpose was to study the feasibility of a triaperture image dissector type readout device utilizing (1) a short, wide-angle electrostatic electron lens for focusing, (2) a yoke of continuous resistance plates for electrostatic deflection, and (3) a set of three multiplier elements for image dissection and video signal generation. The concept of a tri-aperture dissector type readout device was shown to be entirely feasible. Electrooptical imaging of a 2-inch diameter flat surface within a small aspect ratio was shown to approach the design goals. In addition, the use of metallic meshes or screens as electrodes resulted in advantages in image formation which obviate any disadvantages due to the mesh itself. The use of a single electrostatic deflection system was shown to be compatible with multiple readout apertures, and the continuous resistive type of deflection plates gave sensitivities higher than those calculated for other types of deflection systems. The basic design of a continuous channel electron multiplier with a resolution capability of 500 TV lines was established. A gain of better than 100,000 and an output current of 0.00001 ampere have been achieved. The three components focus, deflection, and dissection and readout operate together as a video signal generating tube.