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Performance evaluation of the KamLAND2 prototype detector
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To achieve the sensitivity improvements moving from the KamLAND-Zen experiment to the next- generation KamLAND2-Zen experiment, we constructed the KamLAND2 prototype detector to preliminarily evaluate the proposed improvements to increase the light yield, including the instal- lation of high quantum efficiency photomultiplier tubes, light-collection mirrors, and high emission liquid scintillator. The performance evaluation using this detector showed that the installation of light-collection mirrors alone can increase the light yield by a factor 1.7 to 2.6. Furthermore, the observed light yield showed remarkable stability within the margin of error over a long period of about one year. On the other hand, hardware problems and insufficient tuning of the simulation were also identified.
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Title: Performance evaluation of the KamLAND2 prototype detector
Description:
To achieve the sensitivity improvements moving from the KamLAND-Zen experiment to the next- generation KamLAND2-Zen experiment, we constructed the KamLAND2 prototype detector to preliminarily evaluate the proposed improvements to increase the light yield, including the instal- lation of high quantum efficiency photomultiplier tubes, light-collection mirrors, and high emission liquid scintillator.
The performance evaluation using this detector showed that the installation of light-collection mirrors alone can increase the light yield by a factor 1.
7 to 2.
6.
Furthermore, the observed light yield showed remarkable stability within the margin of error over a long period of about one year.
On the other hand, hardware problems and insufficient tuning of the simulation were also identified.
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