Abstract
Modules of the end-cap time-of-flight detector (ETOF) for the Beijing spectrometer upgrade (BESIII) using different types of scintillators, BC408, BC404 and EJ204, were tested with an 800 MeV electron beam. Different wrapping materials were also tested to improve the light collection efficiency and time resolution. The enhanced specular reflector (ESR) film was found to be the best wrapping material. A time resolution of better than 80 ps over the full length of the ETOF module was achieved.
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