28 December 1989 Performance Characteristics Of A Curved-Channel Microchannel Plate With A Curved Input Face And A Plane Output Face
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Abstract
The performance of a high-gain curved-channel microchannel plate (C2MCP) with a spherical concave input face and a plane output face has been evaluated in the laboratory. This format allows the input face of the MCP to match a curved focal surface, such as in a Rowland circle spectrometer mounting, and, at the same time, permits the use of a high-resolution plane readout array in proximity focus with the output face. The MCP was evaluated in a discrete-anode Multi-Anode Microchannel Array (MAMA) detector system. The MCP tested had channel diameters of 12 gm, a rectangular active area of 9 x 27 mm2, and a front face radius-of-curvature of 250 mm. The length-to-diameter (LID) ratio of the channels varied from 136:1 at the edges of the active area to 106:1 at the center. The variation of the LID ratio across the active area of the MCP allowed the relationship between the saturated modal gain of the pulse-height distribution and the LID ratio to be examined from modal gain measurements. The saturated ,modal gain was found to be inversely proportional to the LID ratio and directly proportional to the applied MCP voltage. The measured performance characteristics are described and compared with gain models based upon the geometric parameters of the MCP.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David C. Slater, Jeffrey S. Morgan, J. Gethyn Timothy, "Performance Characteristics Of A Curved-Channel Microchannel Plate With A Curved Input Face And A Plane Output Face", Proc. SPIE 1158, Ultraviolet Technology III, (28 December 1989); doi: 10.1117/12.962536; https://doi.org/10.1117/12.962536
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