Optimization of the measurement of the mixing angle θ_<e3> by using neutrinos from Kashiwazaki-Kariwa Nuclear Reactors.

利用柏崎刈羽核反应堆中微子优化混合角 θ_<e3> 的测量。

• 批准号: 16540239
• 负责人: TAMURA Norio
• 金额: $ 2.3万
• 依托单位: Niigata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16540239/
• 关键词: Reactor neutrino; Neutrino oscillation; Liquid scintilltor; Fast Flash ADC; Low noise PMT; Geant4 simulation; Thermal neutron Absorption by Gd; Gd入りの液体シンチレータ; シミュレーション; FADC

The following investigation has been done.1) Investigation of liquid scintillator and acrylic vesselAppropriate acryl for a vessel has been chose.Long term stability test is still going on.2) R/D of fast FADCA prototype FADC module of 500MHz, 8bit has been produced and tested.Linearity : sufficiently goodDigital integration in FPGA on the module has been proved to be sufficiently fast for a trigger.3) SimulationA process for the absorption of neutrons by Gd has been implemented by the collaboration with Geant4 developers, which will be provided for the public use after the test of the performance.A simulation program both for a prototype detector and for a full detector is now almost ready for use. The is now being tuned.4) Test of Low noise 10" photomultiplier tube.Investigation has been done by usin HPK 10" PMT. It has been proved that it has sufficient performance for the neutrino detector. Low noise PMT is considered to be available by using a new special furnace.

1）液体闪烁体和丙烯酸容器的研究选择了合适的丙烯酸作为容器材料，并进行了长期稳定性试验。2）研制了500MHz、8bit的快速FADCA原型FADC模块，并进行了测试。足够好模块上的FPGA中的数字集成已被证明对于集成电路来说足够快。3）与Geant 4的开发人员合作，已经实现了Gd吸收中子的过程，该过程将在性能测试后提供给公众使用。原型探测器和完整探测器的模拟程序现在几乎可以使用了。4）低噪声10”光电倍增管的测试。实验证明，它对中微子探测器具有足够的性能。采用新型专用炉型，可实现低噪声光电倍增管。