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Full set of Notes with Fill-Ins - San Jose State University

Full set of Notes with Fill-Ins - San Jose State University

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Chem 155 Unit 5 Page 106 <strong>of</strong> 316Operation <strong>of</strong> the PMT detector:Faceplate material:UV-transparentSilicaPhotocathode potential:From www.hamamatsu.com pmtconstruct.pdf-100 to –1000VA typical PMT may have 12 dynodes, each <strong>of</strong> whichgives <strong>of</strong>f somewhere between 4 and 12 secondaryelectrons depending on the applied voltage.Question:Derive a formula for PMT gain:How many electrons are collected for each incidentphoton? (Use outline on next page…)Page 106 <strong>of</strong> 316

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