Formation of anode signal in ultraviolet single-photon detector

We analyzes the signal at the anode output terminal and simulates the process of the electron cloud cluster diffusing from the MCP to the anode for multi-channel collection. The process of signal formation and the relationship between charge and current in a crossstrip anode detector are studied by numerical simulation method. The simulation results show that the charge generation process is a transient process when the charge is generated. When the charge hits the anode, the current signal is very weak, not an instantaneous change, but has a slow rising process. And the signal duration is relatively long, which will last until all the electrons reach the strip. At the same time, the current of the signal under different voltage conditions is measured, that is, when the voltage is 1800 V, the time is 2.5 s and finally tends to be 1.11 × 10−7 A. The actual results are in agreement with the simulation results, verifying the effectiveness of the model. This shows that our study of the complex electron motion process in the detector provides a theoretical basis for the design of back-end electron amplification, filtering, and readout circuits.