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A new cylindrical photon-veto detector for the K-L -> pi(0)nu(nu)over-bar experiment
- Authors
- Murayama, R.; Togawa, M.; Ahn, J. K.; Comfort, J.; Inagaki, T.; Isoe, M.; Kamiji, I; Kim, E. J.; Kim, J. L.; Komatsubara, T. K.; Lim, G. Y.; Matsumura, T.; Miyazaki, K.; Nanjo, H.; Nomura, T.; Okuno, H.; Pod, E.; Sato, T.; Shiomi, K.; Tajima, Y.; Toyoda, T.; Wah, Y. W.; Watanabe, H.; Yamanaka, T.
- Issue Date
- 11-2월-2020
- Publisher
- ELSEVIER
- Keywords
- Photon veto; Wavelength shifting (WLS) fiber; Kaon rare decay
- Citation
- NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, v.953
- Indexed
- SCIE
SCOPUS
- Volume
- 953
- ISSN
- 0168-9002
- Abstract
- The J-PARC KOTO experiment aims to explore new physics beyond the Standard Model through the K-L -> pi(0)nu(nu) over bar decay. We installed a new photon-veto detector, named the Inner Barrel (IB), to improve the detection efficiency and the timing resolution for photons in the region transverse to the neutral beam. The IB is a 2.8-m-long cylindrical detector with a 1.5 m inner diameter. The IB is a lead-scintillator sampling shower counter with a 5-radiation-length thickness and with a low mass support structure, and fits inside the 14-radiation-length-thick cylindrical detector. Scintillating light is read out from both ends via wavelength shifting fibers with a short decay time. The design, construction and performance of the IB are presented in this paper.
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Collections - College of Science > Department of Physics > 1. Journal Articles
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