TY - JOUR
T1 - Status and Prospect of SK-Gd Project
AU - Super-Kamiokande Collaboration
AU - Hino, Y.
AU - Abe, K.
AU - Bronner, C.
AU - Hayato, Y.
AU - Hiraide, K.
AU - Hosokawa, K.
AU - Ieki, K.
AU - Ikeda, M.
AU - Kameda, J.
AU - Kanemura, Y.
AU - Kaneshima, R.
AU - Kashiwagi, Y.
AU - Kataoka, Y.
AU - Miki, S.
AU - Mine, S.
AU - Miura, M.
AU - Moriyama, S.
AU - Nakano, Y.
AU - Nakahata, M.
AU - Nakayama, S.
AU - Noguchi, Y.
AU - Sato, K.
AU - Sekiya, H.
AU - Shiba, H.
AU - Shimizu, K.
AU - Shiozawa, M.
AU - Sonoda, Y.
AU - Suzuki, Y.
AU - Takeda, A.
AU - Takemoto, Y.
AU - Tanaka, H.
AU - Yano, T.
AU - Han, S.
AU - Kajita, T.
AU - Okumura, K.
AU - Tashiro, T.
AU - Tomiya, T.
AU - Wang, X.
AU - Yoshida, S.
AU - Fernandez, P.
AU - Labarga, L.
AU - Ospina, N.
AU - Zaldivar, B.
AU - Pointon, B. W.
AU - Kearns, E.
AU - Raaf, J. L.
AU - Wan, L.
AU - Wester, T.
AU - Bian, J.
AU - Wilking, M. J.
N1 - Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons.
PY - 2024/9/27
Y1 - 2024/9/27
N2 - In 2020, a new phase of Super-Kamiokande experiment, SK-Gd, was started by loading gadolinium into the pure water. This led to a high neutron detection efficiency, which allows us to distinguish different neutrino reactions, enhance signals and remove backgrounds more efficiently. In the summer of 2022, an update of SK-Gd was done by adding additional Gd, and thus totally 39 tonnes of gadolinium sulfate octahydrate has been introduced in the water. The Gd concentration was estimated as 0.0332±0.0002% based on the dissolved weight of gadolinium sulfate octahydrate powder. It is consistent with the result of the direct sampling from the detector as 334 ± 4 ppm. The spallation neutron measurement and AmBe calibration confirms the shorter capture time constant and higher capture event rate due to the second loading. Therefore, we achieved 1.5 times higher than that of the first loaded phase as expected.
AB - In 2020, a new phase of Super-Kamiokande experiment, SK-Gd, was started by loading gadolinium into the pure water. This led to a high neutron detection efficiency, which allows us to distinguish different neutrino reactions, enhance signals and remove backgrounds more efficiently. In the summer of 2022, an update of SK-Gd was done by adding additional Gd, and thus totally 39 tonnes of gadolinium sulfate octahydrate has been introduced in the water. The Gd concentration was estimated as 0.0332±0.0002% based on the dissolved weight of gadolinium sulfate octahydrate powder. It is consistent with the result of the direct sampling from the detector as 334 ± 4 ppm. The spallation neutron measurement and AmBe calibration confirms the shorter capture time constant and higher capture event rate due to the second loading. Therefore, we achieved 1.5 times higher than that of the first loaded phase as expected.
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M3 - Conference article
AN - SCOPUS:85212300824
SN - 1824-8039
VL - 444
JO - Proceedings of Science
JF - Proceedings of Science
M1 - 983
T2 - 38th International Cosmic Ray Conference, ICRC 2023
Y2 - 26 July 2023 through 3 August 2023
ER -