Analysis for improvement of simultaneity of shuttering in an ultra high-speed framing camera

We suggest a method to improve the shuttering characteristics of an ultra h igh-speed camera that consists of a proximity focused image intensifier wit h a micro channel plate (MCP) and an external transparent electrode (ETE), Over a range of the gating times of the several tens of picoseconds, using this apparatus, there are two obstacles to the system's simultaneity, i.e., accuracy of photographing phenomena. First, the time required for the shut tering pulse to propagate on the electrode creates a time delay between dif ferent areas of the image photons passing through the ETE. Second, the phot oelectrons do not reach the MCP simultaneously. If we attempt to speed-up t he gating time using nonlinear operation of the MCP, the latter problem has an undesirable effect on the resulting image. Our proposal is to compensat e far the latter problem and improve the simultaneity of the arrival time o f photoelectrons at the MCP input surface by controlling the electric field between the photocathode and the MCP, This is achieved by optimizing the s hape of the electrode. Further analysis by FDTD and an electron trajectory tracking method verified that the variance of arrival time is reduced from 30 ps to 5 ps with the altered electrode shape.