Year: 2025
Type: article
Abstract: 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.
Author: Jun Nakane
Institution: Tohoku University
Language: English
Topic: Neutrino Physics Research
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4411505653