Continuing Solar Neutrino Observations with the Homestake Chlorine Detector

AST 98- 02863 Lande，Kenneth E.该奖项为Homestake氯太阳电子中微子探测器的持续运行提供支持。 该探测器是第一个为太阳核聚变反应提供实验证据的探测器，同时证实了观测到的太阳电子中微子通量比标准太阳模型预测的要小得多。 实验得到的结果大约是恒星演化理论预测的27%，在这一开创性工作的基础上，世界上其他研究小组也建造了自己的探测器，并都证实了这一初步结果。 其后果具有重大意义。 许多人现在认为，这些结果只能在中微子有质量的情况下得到解释。 日本另一个太阳中微子探测器最近的工作似乎提供了大质量中微子的第一个证据。 本合同提供的支持将逐步取消NSF对Homestake Mine实验的支持。 这项实验将被目前正在意大利和其他国家进行的其他实验所取代。 在这些实验开始之前，继续在霍姆斯特克进行测量是非常重要的，这个项目得到了能源部和国家科学基金会的联合支持。 能源部将提供第一年业务费用的部分支助。 NSF将提供设备成本和第一年运营的剩余成本。 最后两年的运营支持将由NSF提供。 国家科学基金会的支持是通过参与天文科学司，物理司，和多学科活动办公室在数学和物理科学局。

AST 98-02863Lande, Kenneth E.This award provides support for the continued operation of the Homestake chlorine solar electron neutrino detector. This detector was the first detector to provide experimental evidence for nuclear fusion reaction in the solar core and simultaneously established that the observed solar electron neutrino flux is much smaller than that predicted by the standard solar model. The result obtained by experiment is about 27% that predicted by the theory of stellar evolution.In the light of this pioneering work, other groups around the world have built their own detectors, and all have confirmed this initial result. The consequences have been of high significance. Many now believe that these results can only be explained if the neutrino has mass. Recent work at another solar neutrino detector in Japan seems to have provided the first evidence for massive neutrinos. The support provided in this award will phase out NSF support of the Homestake Mine experiment. This experiment is going to be superceded by other experiments currently under construction in Italy and in other countries. Until such time as these experiments are in operation, it of great importance that the measurements at Homestake continue.This project is being jointly supported by the Department of Energy and the National Science Foundation. DOE will be providing partial support of the first year of operational costs. NSF will provide the costs of equipment and the remaining costs for operations of the first year. The final two years of support of operations will be provided by NSF. NSF support is provided through participation by the Division of Astronomical Sciences, the Division of Physics, and the Office of Multidisciplinary Activities in the Directorate for Mathematical and Physical Sciences.