Optimization of the threshold voltage of an image intensifier in ultra-fast photocathode gating

摘要

In this paper, the spatial distortion of the gated image intensifier is investigated theoretically. A software model is presented and simulations are performed. The accuracy of the model is verified by the broadband frequency response alignment to the measurement. The correspondent simulation result in the time domain is evaluated by two criteria, uniformity and noise to signal ratio. Both criteria show that the non-uniformity caused by the electric field distortion can be minimized by applying a suitable threshold for input pulse shaping.