3 foot imaging FO bundle connected to FO window in a tank flange. Delrin clamshell holder, fasteners, bias rings, and kapton insulation.
Single electron hits from a low-flux source.
Image formed by a 500 eV electron source illuminating an aluminum mask 2.5 to 3 mm from the MCP front. The hole diameters from left to right are 0.2, 0.4, 0.8, and 1.6 mm. Image resulting from a high-flux beam.