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I am designing a electron velocity map imaging setup. I need a copper mesh just infront of the detector to accelerate the electrons towards the MCP detector. I am doing the instrument design for the first time. Can anybody please tell me how to choose a mesh and what are the things should I keep in mind while choosing a mesh for the detector (regarding the number of wires per inch, its transmission etc.)

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Is MCP here "microchannel plate"? –  dmckee Feb 12 '13 at 15:33
@dmckee: yes, it is Microchannel plate –  albedo Feb 13 '13 at 15:38
It's not a detector I have a lot of experience with especially from a design perspective. There are many commercial off the shelf models available, and I have found Hamamatsu's application notes (PDF link) (which are intended to help you select from among their models) for other detector systems often contain considerable hints on the implications of design choices. –  dmckee Feb 13 '13 at 19:11
I have worked with MCPs a lot (they are a common detector used on spacecraft to measure plasma velocity distributions). I found a useful set of notes in the following PDF here. Unfortunately, the accelerator grid mesh material is a topic of which I am not an expert. The important thing to know is the effective transparency of this grid when estimating the deadtime and efficiency of these detectors. –  honeste_vivere Apr 26 at 11:39

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