Double calorimetry system in JUNO
Double calorimetry system in JUNO
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DOI：
10.1007/s41605-017-0022-2
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发表时间：
2017-10
影响因子：
0.6
通讯作者：
Miao He
中科院分区：
文献类型：
--
作者：
Miao He
能量分辨是反应堆反中微子谱测量的关键，是确定中微子质量等级的关键。系统的能量响应的控制是一个挑战的大型液体闪烁体实验，如JUNO.MethodsA小型PMT系统，提出了与大型PMT系统作为一个双重量热。单个3英寸光电倍增管主要接收单个光电子，这为通过光子计数技术校准20英寸光电倍增管系统的能量响应提供了一种独特的方法。结果JUNO已于2017年5月与HZC公司签订合同，将在中央探测器中安装25，000个3英寸光电倍增管。HZC的PMT样品的性能可以满足JUNO的要求。光电倍增管的批量生产和测试正在准备中，读出电子学和水下盒的研发正在进行中。该系统正在建设中，预计将于2020年投入运营。
PurposeEnergy resolution is the key of the reactor antineutrino spectrum measurement, for the determination of the neutrino mass hierarchy. The control of the systematics of the energy response is a challenge to the large liquid scintillator experiment such as JUNO.MethodsA small-PMT system was proposed to work with the large-PMT system as a double calorimetry. The individual 3-inch PMT receives mostly single photoelectrons, which provides a unique way to calibrate the energy response of the 20-inch PMT system by a photon-counting technology.ResultsJUNO has signed a contract with the HZC Company in May 2017 and is going to install 25,000 3-inch PMTs in the central detector. The performances of HZC’s PMT samples can meet the requirements of JUNO. The mass production and testing of PMTs are in preparation, and the R&D of the readout electronics and the underwater box is ongoing.ConclusionsThe double calorimetry system was approved by JUNO. The system is under construction and is expected to be in operation in 2020.