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arxiv: 2104.13169 · v2 · pith:X32CTHJWnew · submitted 2021-04-27 · ⚛️ physics.ins-det · hep-ex

The JSNS² Detector

S. Ajimura , M. Botran , J. H. Choi , J. W. Choi , M. K. Cheoun , T. Dodo , H. Furuta , J. Goh
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K. Haga M. Harada S. Hasegawa Y. Hino T. Hiraiwa H. I. Jang J. S. Jang M. C. Jang H. Jeon S. Jeon K. K. Joo J. R. Jordan D. E. Jung S. K. Kang Y. Kasugai T. Kawasaki E. J. Kim J. Y. Kim S. B. Kim W. Kim H. Kinoshita T. Konno D. H. Lee S. Lee I. T. Lim E. Marzec T. Maruyama S. Masuda S. Meigo S. Monjushiro D. H. Moon T. Nakano M. Niiyama K. Nishikawa M. Nomachi M. Y. Pac J. S. Park S. J. M. Peeters H. Ray G. Roellinghoff C. Rott K. Sakai S. Sakamoto T. Shima C. D. Shin J. Spitz I. Stancu Y. Sugaya F. Suekane K. Suzuya M. Taira R. Ujiie Y. Yamaguchi M. Yeh I. S. Yeo C. Yoo I. Yu A. Zohaib
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classification ⚛️ physics.ins-det hep-ex
keywords detectorneutrinojsnsantineutrinossearchsourcedecayelectron
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The JSNS^2 (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) experiment aims to search for oscillations involving a sterile neutrino in the eV^2 mass-splitting range. The experiment will search for the appearance of electron antineutrinos oscillated from muon antineutrinos. The electron antineutrinos are detected via the inverse beta decay process using a liquid scintillator detector. A 1MW beam of 3 GeV protons incident on a spallation neutron target produces an intense and pulsed neutrino source from pion, muon, and kaon decay at rest. The JSNS^2 detector is located 24 m away from the neutrino source and began operation from June 2020. The detector contains 17 tonnes of gadolinium (Gd) loaded liquid scintillator (LS) in an acrylic vessel, as a neutrino target. It is surrounded by 31 tonnes of unloaded LS in a stainless steel tank. Optical photons produced in LS are viewed by 120 R7081 Hamamatsu 10-inch Photomultiplier Tubes (PMTs). In this paper, we describe the JSNS^2 detector design, construction, and operation.

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