T2K near detectors

T2 K（东海到神冈）实验是日本正在建设的长基线中微子振荡实验。 T2 K将研究在东海的JPARC加速器上产生的高强度μ介子中微子束的振荡，并指向295公里外的超级神冈探测器。 东海的一组近距离探测器将在中微子有机会振荡之前测量中微子束的能谱、通量和背景。这些测量结果将在中微子束到达Super-Kamiokande后与中微子束特性进行比较。 结果是测量了中微子从μ子中微子转变为另一种中微子的概率，它是中微子能量的函数。我们特别希望观察到μ子中微子转变为电子中微子，这是以前从未见过的。 测量这个罕见的过程将确定中微子的“混合角”θ 13，这是粒子物理学中为数不多的几个以前从未测量过的基本参数之一。 加拿大T2 K集团已被委托建造近探测器的跟踪器和质子束监测器。 这笔赠款要求为加拿大T2 K小组的活动提供工资、差旅和研发支持。

The T2K (Tokai to Kamioka) experiment is a long-baseline neutrino oscillation experiment under construction in Japan.  T2K will study the oscillation of a high intensity muon neutrino beam that is created at the JPARC accelerator in Tokai, and pointed towards the Super-Kamiokande detector over 295 km away.  A set of near detectors in Tokai will measure the neutrino beam's energy spectrum, flux, and backgrounds before the neutrinos have had a chance to oscillate. These measurements will then be compared to the neutrino beam properties after it arrives at Super-Kamiokande.  The result is a measurement of the probability as a function of the neutrino's energy that it changes from a muon neutrino into another kind of neutrino. We especially hope to observe muon neutrinos turning into electron neutrinos, which has never before been seen.  Measuring this rare process will determine the neutrino "mixing angle" theta_13, which is one of the few fundamental parameters of particle physics that has never been measured before.  The Canadian T2K group has been entrusted with construction of the near detector's tracker and proton beam monitor.  This grant requests salary, travel, and R&D support for the activities of the Canadian T2K group.