Abstract

We describe the first ever implementation of a clock-based, multi-stage emulsion shifter in an accelerator neutrino experiment. The system was installed in the neutrino monitoring building at the Japan Proton Accelerator Research Complex as part of a test experiment, T60, and stable operation was maintained for a total of 126.6 days. By applying time information to emulsion films, various results were obtained. Time resolutions of 5.3–14.7 s were evaluated in an operation spanning 46.9 days (yielding division numbers of 1.4–3.8$\times10^{5}$). By using timing and spatial information, reconstruction of coincident events consisting of high-multiplicity and vertex-contained events, including neutrino events, was performed. Emulsion events were matched to events observed by INGRID, one of the on-axis near detectors of the T2K experiment, with high reliability (98.5%), and hybrid analysis of the emulsion and INGRID events was established by means of the multi-stage shifter. The results demonstrate that the multi-stage shifter can feasibly be used in neutrino experiments.

Details

Title
First demonstration of an emulsion multi-stage shifter for accelerator neutrino experiments in J-PARC T60
Author
Yamada, K 1 ; Aoki, S 1 ; Cao, S 2 ; Chikuma, N 3 ; Fukuda, T 4 ; Fukuzawa, Y 4 ; Gonin, M 5 ; Hayashino, T 6 ; Hayato, Y 7 ; Hiramoto, A 6 ; Hosomi, F 3 ; Inoh, T 8 ; Iori, S 8 ; Ishiguro, K 4 ; Kawahara, H 4 ; Kim, H 9 ; Kitagawa, N 4 ; Koga, T 3 ; Komatani, R 4 ; Komatsu, M 4 ; Matsushita, A 4 ; Mikado, S 10 ; Minamino, A 11 ; Mizusawa, H 8 ; Matsumoto, T 8 ; Matsuo, T 8 ; Morimoto, Y 8 ; Morishima, K 4 ; Morishita, M 4 ; Naganawa, N 4 ; Nakamura, K 6 ; Nakamura, M 4 ; Nakamura, Y 4 ; Nakano, T 4 ; Nakatsuka, Y 4 ; Nakaya, T 6 ; Nishio, A 4 ; Ogawa, S 8 ; Oshima, H 8 ; Quilain, B 6 ; Rokujo, H 4 ; Sato, O 4 ; Seiya, Y 9 ; Shibuya, H 8 ; Shiraishi, T 4 ; Suzuki, Y 4 ; Tada, S 4 ; Takahashi, S 1 ; Yokoyama, M 3 ; Yoshimoto, M 4 

1  Kobe University, Kobe 657-8501, Japan 
2  High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan 
3  University of Tokyo, Tokyo 113-0033, Japan 
4  Nagoya University, Nagoya 464-8601, Japan 
5  École Polytechnique, IN2P3-CNRS, Laboratoire Leprince–Ringuet, Palaiseau, France 
6  Kyoto University, Kyoto 606-8502, Japan 
7  University of Tokyo, ICRR, Kamioka 506-1205, Japan 
8  Toho University, Funabashi 274-8510, Japan 
9  Osaka City University, Osaka 558-8585, Japan 
10  Nihon University, Narashino 274-8501, Japan 
11  Yokohama National University, Yokohama 240-0067, Japan 
Publication year
2017
Publication date
Jun 2017
Publisher
Oxford University Press
e-ISSN
20503911
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1093/ptep/ptx083
ProQuest document ID
3171476607
Copyright
© The Author(s) 2017. Published by Oxford University Press on behalf of the Physical Society of Japan. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.