Sudbury Neutrino Observatory project B On-site

这项提案（SNO项目拨款B）是为萨德伯里中微子天文台实验（SNO）的加拿大部分现场研究费用提供三年支持的请求，SNO是一个研究中微子基本粒子的大型国际项目。国际项目参与者也支付他们的现场研究费用。中微子能够从为太阳提供动力的热核炉中穿透出来，并在位于安大略省萨德伯里附近地下2公里处的SNO探测器中被探测到。对这些中微子的观测提供了关于太阳能量产生过程的具体信息，中微子本身的基本性质以及中微子对宇宙演化的影响的信息。在重水中使用中子探测器的SNO现阶段的实验计划将继续提供关于太阳中微子的独特信息，同时也研究地球大气、超新星和其他天体物理源中产生的中微子。太阳中微子的特性将通过更精确的味道变化测量来研究，包括昼夜通量比较，以寻找地球上的再生，以及测量中微子通量可能的周期性变化。这些研究可以比目前更有力地确定电子中微子的允许质量范围和耦合参数。已经制定了一项协议，以便在我们银河系发生超新星事件时向天文学界提供早期信息。

This proposal (SNO Project Grant B) is a request for three years of support for the Canadian part of the on-site research costs for the Sudbury Neutrino Observatory experiment (SNO), a large international project to study fundamental particles called neutrinos. International project participants also pay their portion of on-site research costs. Neutrinos are able to penetrate out from the thermonuclear furnaces powering the Sun and are detected in the SNO detector, situated 2 km underground near Sudbury, Ontario. Observation of these neutrinos gives specific information about the energy generation processes in the Sun, basic properties of neutrinos themselves and information about the influence of neutrinos on the evolution of the Universe. The experimental program for the present phase of SNO with neutron detectors in the heavy water will continue to provide unique information on solar neutrinos, while also studying neutrinos produced in the Earth's atmosphere, in supernovae and in other astrophysical sources. Properties of solar neutrinos will be studied through more accurate measurements of flavour change, including day-night flux comparisons to search for regeneration in the Earth and measurements of possible periodic variations in neutrino fluxes. These studies can define the allowed range of masses and coupling parameters for electron neutrinos much more strongly than at present. A protocol has been developed for providing early information to the astronomical community in the event of a supernova in our Galaxy.