Commissioning of liquid xenon gamma-ray detector for MEG II experiment
Commissioning of liquid xenon gamma-ray detector for MEG II experiment
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MEG II 实验液氙伽马射线探测器调试
DOI：
10.1016/j.nima.2022.167877
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
et. al.
中科院分区：
文献类型：
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作者：
Ayaka Matsushita;et. al.
MEG II实验中的液氙（LXe）伽马射线探测器测量来自μ+→e+γ的伽马射线的能量、位置和时间，它是实验达到前所未有的灵敏度的关键。 4092 个 VUV MPPC 和 668 个 PMT 的所有光电传感器均首次读出，并于 2021 年开始物理数据收集。在整个光束时间内监测探测器响应，LXe 探测器稳定运行。使用液氢靶中带电π介子的电荷交换反应后π 0 衰变的伽马射线测量时间和能量分辨率。探测器已成功调试，并已做好长期物理运行的准备。
The liquid xenon (LXe) gamma-ray detector in the MEG II experiment measures the energy, position and timing of the gamma-ray from μ+→ e+ γ, and it is the key to the unprecedented sensitivity of the experiment. All the photo sensors of 4092 VUV MPPCs and 668 PMTs were read out for the first time and a physics data collection started in 2021. The detector response was monitored all through the beam time, and the LXe detector operated stably. The timing and energy resolution were measured using the gamma-rays from the π 0 decays after charge exchange reaction of charged pions in a liquid hydrogen target. The detector has been successfully commissioned and is ready for the long physics run.