12 December 1997 Gain saturation model of microchannel plate devices: recent advances
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A previous model of microchannel plate (MCP) devices operating in conditions of gain saturation has been extended to include charge diffusion along the microchannel during the gain recovery process. To this purpose the set of independent recharging circuits previously associated to each MCP dynode has been replaced by a distributed parameter electrical network that represents the entire microchannel consistently with the structure of the microchannel wall as described in the literature. The model obtained in this way, unlike the previous one, takes into account the interaction between dynodes during the gain recovery and is also consistent with the operation of MCP devices in conditions of very fast gating. As for the previous model the gain and voltage along the channel are described by a pair of coupled, nonlinear differential equations whose numerical solutions are computed in conditions of a steady-state input current. Simplified analytical solutions for short pulse operations are also derived and discussed.
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Leonardo Giudicotti, Leonardo Giudicotti, Michele Bassan, Michele Bassan, Roberto Pasqualotto, Roberto Pasqualotto, Andrea Sardella, Andrea Sardella, "Gain saturation model of microchannel plate devices: recent advances", Proc. SPIE 3173, Ultrahigh- and High-Speed Photography and Image-based Motion Measurement, (12 December 1997); doi: 10.1117/12.294539; https://doi.org/10.1117/12.294539

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