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First measurement of flux of the neutron background induced by accelerated neutrinos at the J-PARC facility
Hiroshi Ito, Ryo Shibayama, Chisako Ise +3
This article reports the measurement of the neutron background flux accidentally induced by the neutrino beam at the J-PARC facility in Japan. In particular, neutrino-nucleus neutr…
Upgrade of Super-Kamiokande with Gadolinium
Yusuke Koshio, Masayuki Nakahata, Hiroyuki Sekiya +1
Super-Kamiokande [SK] was upgraded through the addition of gadolinium sulfate to its ultrapure water, initiating the SK-Gd program. This development enables efficient neutron taggi…
Development of the Beam Monitor Detectors for the Low-E Beamline at the CERN SPS H2 Line
Y. Hino, M. Harada, N. Meguro +7
A series of beam tests were conducted at the KEK AR test beamline in ordet to investigate the performance of a prototype detector for instrumentation in the low-E beamline at the C…
Second gadolinium loading to Super-Kamiokande
K. Abe, C. Bronner, Y. Hayato +246
The first loading of gadolinium (Gd) into Super-Kamiokande in 2020 was successful, and the neutron capture efficiency on Gd reached 50\%. To further increase the Gd neutron capture…
Development of Ultra-pure Gadolinium Sulfate for the Super-Kamiokande Gadolinium Project
K. Hosokawa, M. Ikeda, T. Okada +20
This paper reports the development and detailed properties of about 13 tons of gadolinium sulfate octahydrate, , which has been dissolved into…
Scintillator ageing of the T2K near detectors from 2010 to 2021
The T2K Collaboration, K. Abe, N. Akhlaq +355
The T2K experiment widely uses plastic scintillator as a target for neutrino interactions and an active medium for the measurement of charged particles produced in neutrino interac…