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Journal Articles

On-site background measurements for the J-PARC E56 experiment; A Search for the sterile neutrino at J-PARC MLF

Ajimura, Shuhei*; Bezerra, T. J. C.*; Chauveau, E.*; Enomoto, T.*; Furuta, Hisataka*; Harada, Masahide; Hasegawa, Shoichi; Hiraiwa, T.*; Igarashi, Yoichi*; Iwai, Eito*; et al.

Progress of Theoretical and Experimental Physics (Internet), 2015(6), p.063C01_1 - 063C01_19, 2015/06

 Times Cited Count:3 Percentile:32.69(Physics, Multidisciplinary)

The J-PARC E56 experiment aims to search for sterile neutrinos at the J-PARC Materials and Life Science Experimental Facility (MLF). In order to examine the feasibility of the experiment, we measured the background rates of different detector candidate sites, which are located at the third floor of the MLF, using a detector consisting of plastic scintillators with a fiducial mass of 500 kg. The gammas and neutrons induced by the beam as well as the backgrounds from the cosmic rays were measured, and the results are described in this article.

Oral presentation

Detector construction status; Production and properties of the acrylic vessel for the JSNS$$^2$$ neutrino detector

Hino, Yota; Hasegawa, Shoichi; Furuta, Hisataka*; Maruyama, Takasumi*; Suekane, Fumihiko*

no journal, , 

JSNS2 (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is a short baseline neutrino oscillation experiment searching for appearance oscillation caused by sterile neutrinos in Material and Life Science Experimental Facility (MLF) of J-PARC. The JSNS2 detector consists of 17 tons of Gadolinium loaded liquid scintillator (Gd-LS) contained in an acrylic vessel at the center of the detector and 33 tons of unloaded liquid scintillator. The Gd-LS layer is a fiducial volume for neutrino detection via the inverse beta-decay using the delayed coincidence method. The acrylic vessel has been manufactured in Taiwan, and its quality has been investigated from the viewpoints of detector performance and safety. In this presentation, we report the design and the result of the surveys of optical properties, geometry, pressure resistance and leakage, and present status of the detector construction.

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