Unformatted text preview: (300K), what is the minimum detectable power of this PMT? b) What would the cathode dark current be if you cool the PMT down to 200K? Does it suggest a way of reducing the dark current? What is the minimum detectable power now? How much improvement in the sensitivity of the PMT you’ve gained in cooling it down?  Shot noise; Poisson statistics; SNR Given the same cathode dark current at 300K, what is the shot noise? What is the signaltonoise ratio? Assume the bandwidth is 1Hz, which means that, the integration time is 1 sec. II. Brief intro to semiconductor and pn junction...
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 Spring '09
 Electron, Light, Photomultiplier, Jeff Bokor

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