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Proceedings Paper

Gain saturation model of microchannel plate devices: recent advances
Author(s): Leonardo Giudicotti; Michele Bassan; Roberto Pasqualotto; Andrea Sardella
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Paper Abstract

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 To this purpose the set of independent recharging circuits previously associated to each MCP dynode has been replaced by a distributed parameter electrical network that represents the entire microchannel consistently with the structure of the microchannel wall as described in the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.

Paper Details

Date Published: 12 December 1997
PDF: 8 pages
Proc. SPIE 3173, Ultrahigh- and High-Speed Photography and Image-based Motion Measurement, (12 December 1997); doi: 10.1117/12.294539
Show Author Affiliations
Leonardo Giudicotti, Univ. degli Studi di Padova (Italy)
Michele Bassan, Istituto Gas Ionizzati/CNR (Italy)
Roberto Pasqualotto, Istituto Gas Ionizzati/CNR (Italy)
Andrea Sardella, Istituto Gas Ionizzati/CNR (Italy)


Published in SPIE Proceedings Vol. 3173:
Ultrahigh- and High-Speed Photography and Image-based Motion Measurement
C. Bruce Johnson; Andrew Davidhazy; James S. Walton; Takeharu Goji Etoh; C. Bruce Johnson; Donald R. Snyder; James S. Walton, Editor(s)

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