TY - JOUR
T1 - Upgrade of the KamLAND-Zen mini-balloon and future prospects
AU - For the KamLAND-Zen Collaboration
AU - Ozaki, H.
AU - Takeuchi, A.
N1 - Funding Information:
The KamLAND-Zen experiment is supported by JSPS, Japan KAKENHI Grants No. 21000001 and No. 26104002 ; the World Premier International Research Center Initiative (WPI Initiative), Japan , MEXT, Japan ; Stichting FOM in the Netherlands ; and under the U.S. Department of Energy (DOE), United States Contract No. DE-AC02-05CH11231 , as well as other DOE and NSF grants to individual institutions. The Kamioka Mining and Smelting Company has provided service for activities in the mine. We acknowledge the support of NII for SINET4.
Funding Information:
The KamLAND-Zen experiment is supported by JSPS, Japan KAKENHI Grants No. 21000001 and No. 26104002; the World Premier International Research Center Initiative (WPI Initiative), Japan, MEXT, Japan; Stichting FOM in the Netherlands; and under the U.S. Department of Energy (DOE), United States Contract No. DE-AC02-05CH11231, as well as other DOE and NSF grants to individual institutions. The Kamioka Mining and Smelting Company has provided service for activities in the mine. We acknowledge the support of NII for SINET4.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/4/1
Y1 - 2020/4/1
N2 - KamLAND-Zen is neutrinoless double beta (0νββ) decay search experiment with Xe-loaded liquid scintillator (XeLS) containing about 91% enriched 136Xe. The mini-balloon is a container for holding XeLS at the center of the KamLAND detector without impairing the extremely low radiation environment. We have installed a new mini-balloon with a thickness of 25μm and a radius of 1.92 m, which was made in a class 1 clean room and is almost twice the volume of the KamLAND-Zen 400 mini-balloon. We installed about 745 kg of Xe gas in the XeLS and started the 0νββ decay search in January 2019. In this paper, novel hardware developments to collect data without loss just after a large light yield event, such as a cosmic ray muon spallation are also introduced in preparation for the KamLAND2-Zen which is a future upgrade of the KamLAND-Zen.
AB - KamLAND-Zen is neutrinoless double beta (0νββ) decay search experiment with Xe-loaded liquid scintillator (XeLS) containing about 91% enriched 136Xe. The mini-balloon is a container for holding XeLS at the center of the KamLAND detector without impairing the extremely low radiation environment. We have installed a new mini-balloon with a thickness of 25μm and a radius of 1.92 m, which was made in a class 1 clean room and is almost twice the volume of the KamLAND-Zen 400 mini-balloon. We installed about 745 kg of Xe gas in the XeLS and started the 0νββ decay search in January 2019. In this paper, novel hardware developments to collect data without loss just after a large light yield event, such as a cosmic ray muon spallation are also introduced in preparation for the KamLAND2-Zen which is a future upgrade of the KamLAND-Zen.
KW - Low background detector
KW - Neutrinoless double beta decay
KW - Scintillator
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U2 - 10.1016/j.nima.2019.162353
DO - 10.1016/j.nima.2019.162353
M3 - Article
AN - SCOPUS:85071175512
SN - 0168-9002
VL - 958
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
M1 - 162353
ER -