The relative electron detection efficiency of a detector consisting of two microchannel plates (MCP) in a chevron arrangement with a carbon coated high transmission (94%) copper grid 6 mm in front of the first MCP was experimentally determined. The energy of the electrons hitting the detector was varied by accelerating a pulsed electron beam of known energy. By modeling the secondary electron emission from the grid and averaging for possible variations in the electron flux, the relative efficiency was determined to within 2% in the range ∼0 to 3 keV. Fits of the relative efficiency to an analytic expression as a function of incident energy and grid bias energy are reported.
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Goruganthu et al. (1984) studied this question.
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