Analyses of data for the investigation of solar neutrinos and double beta decay within the scintillator phase (including the Tellurium phase) of the SNO+ experiment by using for the first time a newly developed reconstruction-code in this research area.

在这项拨款申请的设想时间内，SNO+探测器，一个1000吨的液体闪烁体探测器，将在第一阶段收集太阳中微子的数据，在第二阶段额外添加超过2吨的碲，用于无中微子的双β衰变搜索。这是迄今为止用于双衰变搜索的最大数量。此外，除了KamLAND之外，这是唯一一个运行的1000吨闪烁探测器，但比KamLAND深得多。SNO+也是超新星预警系统（SNEWS）的一部分。除了在2公里深处进行实验的特殊情况外，汉堡大学发明的一种新的轨道重建代码可以首次在实际运行的实验中进行探索，验证和改进。这可能是未来朱诺号、京平号和忒伊亚号等闪烁体实验的一个突破。在这一资助期内，SNO+将收集太阳数据，这使得研究所谓的3 MeV能量的“上升”成为可能，也将首次将一些中微子源与非常成功的Borexino实验进行比较。在闪烁体中包含超过2.3吨的碲，将在短时间内达到超过10^26年的半衰期灵敏度，从而成为世界领先的实验之一。这些测量对于决定是否在未来添加更多的碲也是至关重要的。

Within the envisaged time period of this grant application the SNO+ detector, a 1000 tons liquid scintillator detector, will take data in a first phase for solar neutrinos and a second phase with additional added Tellurium of more than 2 tons for neutrino-less double beta decay searches. This is the largest amount of ever used for double beta decay searches. Furthermore, besides KamLAND, this is the only 1000 ton Scintillation detector operating, but much deeper than KamLAND. SNO+ is also part of the Supernova early warning system (SNEWS). Besides the privileged situation to perform an experiment in the depth of 2 km a new track reconstruction code, invented at the University of Hamburg, can be for the first time explored in a real running experiment, verified and improved. This can be a breakthrough for future scintillator experiments like JUNO, Jingping and Theia.Within this grant period SNO+ will take solar data, which allows to study the so called "upturn" at 3 MeV energy and als for the first time some neutrino sources can be compared with the those of the very successful Borexino experiment. The inclusion of more than 2.3 tons of Tellurium in the scintillator will allow within a short time to reach half-life sensitivities of more than 10^26 years and thus be one of the world leading experiments. These measurements will also be crucial for the decision whether to add more Tellurium in the future.