The Aerogel RICH detector of the Belle II experiment

Autor: Luka Santelj, Ichiro Adachi, Leonid Burmsistrov, Rok Dolenec, Koki Hataya, Toru Iijima, Shiori Kakimoto, Hidekazu Kakuno, Hideyuki Kawai, Takeo Kawasaki, Haruki Kindo, Takashi Kohriki, Tomoyuki Konno, Samo Korpar, Emi Kou, Peter Krizan, Tetsuro Kumita, Yun-Tsung Lai, Masahiro Machida, Manca Mrvar, Shohei Nishida, Kouta Noguchi, Kazuya Ogawa, Satoru Ogawa, Rok Pestotnik, Masayoshi Shoji, Takayuki Sumiyoshi, Makoto Tabata, Sachi Tamechika, Masanobu Yonenaga, Morihito Yoshizawa, Yosuke Yusa, Francois Le Diberder
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)
Rok vydání: 2020
Předmět:
Zdroj: PoS
2019 European Physical Society Conference on High Energy Physics
2019 European Physical Society Conference on High Energy Physics, Jul 2019, Ghent, Belgium. pp.181, ⟨10.22323/1.364.0181⟩
Popis: International audience; In the forward end-cap of the Belle II spectrometer, an innovative proximity focusing Ring Imaging Cherenkov counter with a multilayer focusing aerogel radiator has been installed. The detector is designed to be operated in a magentic field of 1.5 T, and consists of a double layer aerogel radiator, an expansion volume and a photon detector. In total 420 Hamamatsu hybrid avalanche photo sensors with 144 channels each are used to read out single Cherenkov photons with high efficiency. We expect the device to provide better than 4s separation of pions from kaons in the full kinmatic region of the experiment, from 0.5 GeV/c to 4 GeV/c. The detector components have been successfully produced and installed in the spectrometer. After the commissioning phase in 2018, the detector is now included in the Belle II data taking, and is expected to contribute substantially to the performance of the spectrometer in looking for rare decays of B and D mesons, and of tau leptons. In this contribution we review the detector design and present results of the first detector performance studies.
Databáze: OpenAIRE
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