Belle Ii Aerogel Rich Detector

I. Adachi,F. Le Diberder,R. Dolenec, K. Hataya,T. Iijima,S. Kakimoto,H. Kakuno, H. Kawai,T. Kawasaki,H. Kindo, T. Kohriki,T. Konno,S. Korpar, P. Križan,T. Kumita, Y. Lai,M. Machida,M. Mrvar,S. Nishida,K. Noguchi,K. Ogawa, S. Ogawa, R. Pestotnik, L. Šantelj,M. Shoji, T. Sumiyoshi,M. Tabata, S. Tamechika, M. Yonenaga,M. Yoshizawa,Y. Yusa,L. Burmistrov

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT（2020）

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摘要

The aerogel Ring Imaging CHerenkov counter (ARICH) is the particle identification device installed in the forward region of the Belle II detector at the SuperKEKB accelerator facility in Japan. The first electron-positron collisions at SuperKEKB took place on April 26, 2018, during the so called phase 2 run. The measured performance of the detector based on recorded Bhabha events during phase 2 is presented. We measure a 14 mrad average angular resolution per photon and 10 photons per Bhabha electron in the [6-8] GeV/c momentum range.

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关键词

RICH, Aerogel, Cherenkov effect, Particle identification detector

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