Microchannel Plate Devices With Multiple Emissive Layers

A microchannel plate comprising:

• a. a plate of glass fibers defining a plurality of pores extending from a top surface of the plate to a bottom surface of the plate, the plurality of pores having a lead semiconductor material on an outer surface that forms a first emissive layer;
• b. a second emissive layer deposited over the first emissive layer, the second emissive layer being chosen to achieve at least one of an increase in secondary electron emission efficiency and a decrease in gain degradation as a function of time;
• c. a top electrode positioned on the top surface of the plate;
• and
• d. a bottom electrode positioned on the bottom surface of the plate.

A single channel electron multiplier comprising:

• a. a substrate defining a single channel extending from a top surface of the substrate to a bottom surface of the substrate, the channel having a resistive material on an outer surface that forms a first emissive layer;
• b. a second emissive layer deposited over the first emissive layer, the second emissive layer being chosen to increase a secondary electron emission efficiency of the single channel electron multiplier;
• c. a top electrode positioned on the top surface of the substrate;
• and
• d. a bottom electrode positioned on the bottom surface of the substrate.