27 April 2010 Cross strip microchannel plate imaging photon counters with high time resolution
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We have implemented cross strip readout microchannel plate detectors in 18 mm active area format including open face (UV/particle) and sealed tube (optical) configurations. These have been tested with a field programmable gate array based parallel channel electronics for event encoding which can process high input event rates (> 5 MHz) with high spatial resolution. Using small pore MCPs (6 μm) operated in a pair, we achieve gains of >5 x 105 which is sufficient to provide spatial resolution of <35 μm FHWM, with self triggered event timing accuracy of ~2 ns for sealed tube optical sensors. A peak quantum efficiency of ~19% at 500 nm has been achieved with SuperGenII photocathodes that have response over the 400 nm to 900 nm range. Local area counting rates of up to >200 events/mcp pore sec-1 have been attained, along with image linearity and stability to better than 50 μm.
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Oswald H. W. Siegmund, Oswald H. W. Siegmund, John V. Vallerga, John V. Vallerga, Anton S. Tremsin, Anton S. Tremsin, Laura C. Stonehill, Laura C. Stonehill, Robert Shirey, Robert Shirey, Michael W. Rabin, Michael W. Rabin, David C Thompson, David C Thompson, } "Cross strip microchannel plate imaging photon counters with high time resolution", Proc. SPIE 7681, Advanced Photon Counting Techniques IV, 768109 (27 April 2010); doi: 10.1117/12.846888; https://doi.org/10.1117/12.846888

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