NDLI: Studies of a proximity focusing RICH with aerogel radiator for Belle II experiment

Content Provider	IEEE Xplore Digital Library
Author	Hara, K. Adachi, I. Dolenec, R. Iijima, T. Imamura, M. Iwata, S. Kawai, H. Korpar, S. Krizan, P. Kumita, T. Kuroda, E. Nishida, S. Ogawa, S. Pestotnik, R. Shiizuka, S. Sumiyoshi, T. Tabata, M. Tagai, S. Verheyden, R.
Copyright Year	2010
Description	Author affiliation: J. Stefan Institute, Ljubljana, Slovenia (Dolenec, R.; Pestotnik, R.; Verheyden, R.) \|\| Chiba University, Chiba, Japan (Kawai, H.) \|\| High Energy Accelerator Research Organization (KEK), Tsukuba, Japan (Adachi, I.; Nishida, S.) \|\| University of Maribor, Maribor, Slovenia and J. Stefan Institute, Ljubljana, Slovenia (Korpar, S.) \|\| Toho University, Funabashi, Japan (Ogawa, S.; Tagai, S.) \|\| Japan Aerospace Exploration Agency (JAXA), Sagamihara, Japan (Tabata, M.) \|\| Tokyo Metropolitan University, Tokyo, Japan (Iwata, S.; Kumita, T.; Kuroda, E.; Sumiyoshi, T.) \|\| Graduate School of Science, Nagoya University, Nagoya, Japan (Hara, K.; Iijima, T.; Imamura, M.; Shiizuka, S.) \|\| University of Ljubljana, Ljbljana, Slovenia and J. Stefan Institute, Ljubljana, Slovenia (Krizan, P.)
Abstract	For the Belle II experiment, we are developing a proximity focusing ring imaging Cherenkov counter using a silica aerogel as a radiator. Recently, a new aerogel fabrication method, called “pin-hole drying”, was invented and remarkably improved optical transparency has been realized in the region of refractive index larger than 1.05. For the photo-detector, we have developed a 144-channel Hybrid Avalanche Photo-Detector with Hamamatsu Photonics K. K. The HAPD has excellent single photon detection performance, 5 × 5 $mm^{2}$ position resolution and immunity to magnetic field. The tolerance to the neutron irradiation up to 5 × $10^{11}$ $neutron/cm^{2}$ has been confirmed. In November 2009, we have performed a test beam experiment at KEK for a prototype A-RICH counter with 6 HAPDs and aerogel tiles produced by the “pin-hole drying” method. We successfully observed a clear Cherenkov ring image and obtained the single photon Cherenkov angle resolution of 13.5 mrad and 15.3 detected photoelectrons. This result corresponds to more than 6σ K/π separation at 4 GeV/c and fulfills the requirement for the Belle II.
Starting Page	415
Ending Page	419
File Size	1198093
Page Count	5
File Format	PDF
ISBN	9781424491063
ISSN	10957863
e-ISBN	9781424491056
DOI	10.1109/NSSMIC.2010.5873792
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Aerogel Particle ID RICH Belle II HAPD Photo-detector
Content Type	Text
Resource Type	Article

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Development of a RICH counter with 144-ch Hybrid Avalanche Photo-Detectors for the Belle II experiment

Development of 144ch HAPD for aerogel RICH for Belle upgrade

Study of 144-ch Hybrid Avalanche Photo-Detector with high density electronics system for Belle-II RICH counter

Development of large area silica aerogel used as RICH radiator for the Belle II experiment

Readout electronics of 144ch HAPD developed for the Belle-II Aerogel RICH system

Silica aerogel radiator for use in the A-RICH system utilized in the Belle II experiment

Tests of a proximity focusing RICH with aerogel as radiator

Tests of a proximity focusing RICH with aerogel as radiator

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Studies of a proximity focusing RICH with aerogel radiator for Belle II experiment

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