JPS Conf. Proc. 27, 011007 (2019) [6 pages]
Proceedings of the 5th International Workshop on New Photon-Detectors (PD18)
Development of TPC Trigger Hodoscope for J-PARC E42/E45 Hadron Experiment
1Department of Physics, Korea University, Seoul 136-713, Korea
2ASRC, JAEA, Tokai, Ibaraki 319-1195, Japan
3Ohio University, Athens, Ohio 45701, U.S.A.
4Korea Research Institute of Standards and Science (KRISS), Daejeon 305-600, Korea
Received March 25, 2019

We have developed HypTPC consists of TPC and the trigger hodoscope for the J-PARC hadron experiments. The TPC Hodoscope has large scintillators of 80 × 7 × 1 cm3 to cover the TPC. Especially, we have developed a readout circuit for multiple MPPCs to detect photons generated over a large area of the scintillator. A general methods of applying voltage to multiple MPPCs are parallel and series connections. In the case of parallel connections, a signal has a long tail due to the large sensor capacitance. MEG collaboration used four MPPC segments as a serial connection. However, in the case of a series connection, the requiring bias voltage is very high, and the gain is low. To avoid this problem, we have developed a new individual biasing method with a summing amplifier for stable multiple MPPC readouts.

We also made prototype detectors and performed a cosmic-ray test. Brief descriptions of our prototypes and preliminary results of the cosmic-ray test are presented in this article.

©2019 The Author(s)
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