Search for high energy cosmic neutrinos by the Ice Cube Neutrino Observatory

冰立方中微子天文台寻找高能宇宙中微子

基本信息

批准号：
15403004
负责人：
KAWAI Hideyuki
金额：
$ 3.71万
依托单位：
Chiba University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15403004/
关键词：
neutrinos cosmic rays astrophysics south pole elementary particle 物理学

项目摘要

We have made significant commitments on construction of the IceCube neutrino observatory at the South pole station. We built calibration apparatus to measure the uniformity, the charge response and the absolute quantum efficiencies of the optical sensors in the laboratory. Approximately an order of 1000 photomultipliers to detection Cherenkov light in a deep-ice has been calibrated and characterized. All the calibration results including the parameter values to characterize their signal response has been available via website and available to the simulation process. The relevant detector simulation has also been developed and now in use for the data analysis.In order to reduce the systematic uncertainties in determination of particle energy, we built absolutely calibrated standard reference detectors being fully characterized in the laboratory. During 2005-2006 seasons, 16 of such reference detectors were assembled by the financial support of the grant. A have of them was deployed in the polar summer of 2006, a rest of them will be in deployment next year. The data from these detectors provides important tools to understand the energy scale of the detected events.We have fully investigated propagation of the extremely- high energy neutrinos and the secondary particles in the earth so that the expected intensity and the energy distribution of the leptons at the depth of the IceCube deep-ice array can be accurately calculated. The Mote Carlo simulation was carried out to predict the event rate for the various models of cosmic neutrinos.In summary we are now fully prepared to analyze the up-coming data from the IceCube neutrino observatory. All the R＆D's concerning the detectors and the softwares have been completed with the support of the grant. The first physics analysis is scheduled to be published during year of 2007.

我们已经在南极站的Icecube神经元观察的建设上做出了重大承诺。我们建立了校准批准，以测量实验室光学传感器的均匀性，电荷响应和绝对量子效率。在深冰中检测Cherenkov光的大约1000个光电培养基的顺序已被校准和表征。所有校准结果包括以表征其信号响应的参数值，可通过网站获得，并可用于仿真过程。还已经开发了相关的检测器仿真，现在正在用于数据分析。为了减少粒子能量的系统不确定性，我们构建了绝对校准的标准参考探测器在实验室中充分表征。在2005年至2006年的季节中，赠款的财政支持汇集了16个此类参考探测器。其中的A部署在2006年的极地夏季部署，其余的将在明年部署。来自这些检测器的数据提供了重要的工具来了解检测到的事件的能量尺度。我们已经完全研究了地球中极高的能量神经元和二级颗粒的传播，因此可以准确地计算出icecube深层冰阵列深度处的瘦素的预期强度和能量分布。进行了MOTE CARLO模拟，以预测各种宇宙神经元模型的事件速率。总而言之，我们已经准备好分析来自Icecube神经元观察的上升数据。在赠款的支持下，所有有关探测器和软件的R＆D均已完成。第一个物理分析计划于2007年发表。