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In a test experiment at the Final Focus Test Beam of the Stanford Linear Accelerator Center, the fluorescence yield of 28.5GeV electrons in air and nitrogen was measured. The measured photon yields between 300 and 400nm at 1atm and 29°C areY(760Torr)air=4.42±0.73andY(760Torr)N2=29.2±4.8photons per electron per meter. Assuming that the fluorescence yield is proportional to the energy deposition of...
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