Performance and commissioning of HAPDs in the Aerogel RICH counter
| Autor: | Luka Santelj, S. Korpar, Shohei Nishida, M. Yoshizawa, M. Machida, Tomoyuki Konno, Hidekazu Kakuno, P. Križan, Rok Pestotnik, M. Mrvar, T. Sumiyoshi, Takashi Kohriki, K. Ogawa, S. Tamechika, Hideyuki Kawai, M. Yonenaga, S. Kakimoto, I. Adachi, K. Hataya, M. Tabata, M. Shoji, Francois Le Diberder, S. Ogawa, Toru Iijima, T. Kumita, Y. Lai, Takeo Kawasaki, K. Noguchi, L. Burmistrov, Rok Dolenec, H. Kindo, Y. Yusa |
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| Přispěvatelé: | Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Nuclear and High Energy Physics
noise Photon Cherenkov detector Physics::Instrumentation and Detectors aerogel Photodetector BELLE Photon detector 7. Clean energy 01 natural sciences law.invention Nuclear physics Pion law 0103 physical sciences [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] 010306 general physics ARICH Instrumentation RICH Cherenkov radiation Physics Spectrometer 010308 nuclear & particles physics Detector Aerogel stability High Energy Physics::Experiment photon: detector performance |
| Zdroj: | Nucl.Instrum.Meth.A |
| Popis: | International audience; The Belle II Aerogel Ring Imaging Cherenkov (ARICH) counter uses the angular distribution of Cherenkov photons emitted in silica aerogel to discriminate between charged pions and kaons. The Hybrid Avalanche Photo Detector (HAPD) is used as the photo-sensor, and is clearly the most critical component of the detector. HAPDs were installed into ARICH in July 2017, and ARICH was installed in the Belle II spectrometer in the end of 2017. During the Belle II beam commissioning in spring 2018, the performance of HAPDs was evaluated through measurements of the offset value, noise level and pulse height. Long term stability of the signal-to-noise ratio and the fraction of dead channel was also monitored. The signal-to-noise ratio exceeded 6, and the fraction of dead channels was less than 1%. The results of the performance evaluation and of the commissioning showed that the ARICH counter fulfills the requirements. |
| Databáze: | OpenAIRE |
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