Speaker
Ms
Chiori Fujisawa
(Keio University)
Description
Hyper-Kamiokande is aiming at high-precision measurement of neutrinos. However, output of 20-inch photomultiplier tubes is not linearly amplified in a certain range of the amount of incident light. The output nonlinearity was measured with the photomultiplier tube used in Hyper-Kamiokande. It depended on bias voltage and bleeder circuit. In order to suppress these effects, we improved the built-in bleeder circuit. We are also trying to construct modelling for calculating energy precisely.
I will present the stable output linearity by improving the bleeder circuit and the trial of the nonlinearity modelling.
Primary author
Ms
Chiori Fujisawa
(Keio University)
Co-authors
Prof.
Yasuhiro NISHIMURA
(Keio University)
Mr
Yuto Maekawa
(Keio University)
