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Research and development of fast-timing large-area thin detector

Abstract:

We are developing a thin and large-area plastic scintillation counter attached by wavelength shifting fibers for a fast timing detector of good time resolution. It is the most effective to increase the light yield and to reduce the time jitter that the plastic scintillator plate with the polished surface is wrapped by a white-painted box and it is also important that the gap between a wavelength shifting fiber and a groove is filled up with optical grease. Taking uniformity of the light yield into account, we should wrap a plastic scintillator plate by a white-painted box and array wavelength shifting fibers separately rather than concentratedly in a scintillator plate. We have a bright outlook for success in the development of the thin detector with small time jitter and sufficient light yield suitable for the fast timing detector in an air shower array.