Recent results and future prospects of Super-Kamiokande
Recent results and future prospects of Super-Kamiokande
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DOI：
10.1016/j.nima.2018.11.093
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发表时间：
2020-02
影响因子：
1.4
通讯作者：
Yasuo Takeuchi
中科院分区：
文献类型：
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作者：
Yasuo Takeuchi
超级神冈探测器(SK)是位于日本东京大学神冈天文台地下1000米处的水切伦科夫探测器。它由一个圆柱形不锈钢水箱，50,000吨纯净水和11,000个20英寸PMTS组成。SK探测器的基准体积为22.5kton。该实验于1996年4月开始，目前正在进行第四阶段(SK-IV)。自1996年以来，SK一直是世界上最大的地下纯净水切伦科夫探测器。SK有多种测量或物理目标，即太阳中微子、大气中微子、超新星中微子、J-PARC加速器产生的中微子(如T2K实验)，以及寻找核子衰变。在不久的将来，我们将进入下一个阶段，即SK-Gd。在SK-Gd阶段，我们计划在目前的SK探测器中加入0.1%的Gd，以提高中子标记效率，然后尝试实现超新星遗迹中微子(SRN)(或扩散超新星中微子背景(DSNB))的首次观测。这项升级工程的初步工作于2018年6月开始。本文简要介绍了SK实验、太阳中微子的最新结果和大气中微子的最新结果。作为未来的计划，报告了SK-Gd的目的和升级工作的情况。
Super-Kamiokande (SK) is a water Cherenkov detector located 1000 m underground in Kamioka Observatory, ICRR, University of Tokyo in Japan. It consists of a cylindrical stainless steel tank, 50,000 ton of purified water, and 11,000 of 20-inch PMTs. The fiducial volume of the SK detector is 22.5 kton. The experiment was started in April 1996, and currently phase IV (SK-IV) is running. SK has been the world largest water Cherenkov detector with purified water in underground since 1996. SK has a variety of measurement or physics targets, namely, solar neutrinos, atmospheric neutrinos, supernova neutrinos, neutrinos produced by the accelerator in J-PARC (as T2K experiment), and search for nucleon decay.In near future, we are going to move to the next phase, that is SK-Gd. In the SK-Gd phase, we are planning to add 0.1% of gadolinium to the current SK detector in order to enhance neutron tagging efficiency, and then try to achieve the first observation of supernova relic neutrinos (SRN) (or diffuse supernova neutrino background (DSNB)). The initial work in this upgrade project was started in June 2018.This paper reports a brief summary of the SK experiment, recent solar neutrino results, and recent atmospheric neutrino results. As a future plan, the purpose of SK-Gd and status of the upgrade work are reported.