Development of PPDs to detect scintillation light from liquid xenon

Toshiyuki Iwamoto, Xue Bai, Teppei Chiba, Yuki Fujii, Tomiyoshi Haruyama, Daisuke Kaneko, Akihiro Maki, Satoshi Mihara, Toshinori Mori, Hiroaki Natori, Hajime Nishiguchi, Wataru Ootani, Ryu Sawada, Yusuke Uchiyama

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

Abstract

MEG experiment searches for new physics like SUSY-GUT/SUSY-seesaw through the lepton flavor violating μ → εγ decay. The current MEG experiment utilizes 846 2 inch PMTs in order to detect scintillation light in 900 ℓ liquid xenon gamma-ray calorimeter. R&D of Pixelated Photon Detector (PPD) have been actively performed in many different fields as a new novel silicon photon detector, and we started developing a new type of PPD which is sensitive to liquid xenon scintillation light (175nm wavelength) as one of possible candidates of MEG detector upgrade plan in collaboration with Hamamatsu Photonics. Basic characteristics of these samples such as photon detection efficiency(PDE), gain, dark rate, cross talk, after pulse, pulse rise time/fall time, timing resolution, linearity etc. are being measured in a small setup in PSI with 2 ℓ liquid xenon, refrigerator, and 241Am source. Preliminary result already shows 10% PDE in liquid xenon. These results and further optimization of MPPC parameters as well as possible prototype plan are described here.

Original languageEnglish
Title of host publicationIEEE Nuclear Science Symposium Conference Record
Subtitle of host publication2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2012
EditorsBo Yu
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Pages1589-1594
Number of pages6
ISBN (Print)9781467320306
DOIs
Publication statusPublished - 1 Dec 2012
Externally publishedYes
Event2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2012 - Anaheim, CA, United States of America
Duration: 29 Oct 20123 Nov 2012

Conference

Conference2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2012
CountryUnited States of America
CityAnaheim, CA
Period29/10/123/11/12

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