Aerogel-Based Ring-Imaging Cherenkov counter in the Belle II experiment
| Autor: | S. Nishida, Iki Adachi, S. Kakimimoto, M. Yoshizawa, Y. Yusa, Kohei Ogawa, Tomoyuki Konno, K. Noguchi, K. Hataya, Makoto Tabata, H. Kindo, F. Le Diberder, T. Sumiyoshi, H. Kawai, M. Machida, L. Santelj, S. Ogawa, S. Korpar, M. Nishimura, M. Mrvar, T. Kumita, Hidekazu Kakuno, P. Krizan, M. Yonenaga, L. Burmistrov, S. Tamechika, Takeo Kawasaki, R. Pestotnik, Y. Lai |
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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: |
Meson
Physics::Instrumentation and Detectors aerogel Photodetector Cosmic ray BELLE Integrated circuit 030218 nuclear medicine & medical imaging law.invention Nuclear physics K: particle identification 03 medical and health sciences 0302 clinical medicine law [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] RICH Cosmic rays Cherenkov radiation FPGA Physics refractive index Mesons business.industry Detector integrated circuit Field programmable gate arrays Detectors Corporate acquisitions Photonics Image reconstruction electronics: readout CP violation High Energy Physics::Experiment business pi: particle identification performance |
| Zdroj: | 2018 IEEE Nuclear Science Symposium and Medical Imaging Conference 2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, Nov 2018, Sydney, Australia. ⟨10.1109/NSSMIC.2018.8824726⟩ |
| DOI: | 10.1109/NSSMIC.2018.8824726⟩ |
| Popis: | International audience; In the charged particle identification system of the Belle II experiment, an aerogel-based proximity focusing ring-imaging Cherenkov (ARICH) counter is installed in the forward end-cap region of the Belle II detector. The goal is to enhance the power of separation between kaons and pions up to and above 4σ for momenta up to 4 GeV/c, which is critical to the study of CP violation involved in B decays. The counter is made of aerogel tiles with refractive indices n of 1.045 and 1.055, transmission lengths of 30-40 mm, and dimensions of 18 × 18 × 2 cm3. A 144-channel HAPD (Hybrid Avalanche Photo Detector) is adopted as a photo-detector, and the HAPD signal processing is performed using ASICs (Application Specific Integrated Circuit) to digitize the signal and FPGAs (Field Programmable Gate Array) for data processing.During Phase II operation of SuperKEKB, the commissioning of ARICH is done both with cosmic rays and beam collisions. The Cherenkov rings are clearly observed, and the performance of the hardware system and identification algorithm is being evaluated. In this paper, we will report on the construction of ARICH and on the initial performance of the detector obtained during the commissioning. |
| Databáze: | OpenAIRE |
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