Toward a Km-Scale Neutrino Observatory: Digital Instrumentation

迈向公里级中微子观测站：数字仪器

• 批准号: 9818083
• 负责人: George Smoot
• 金额: $ 30万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-06-15 至 2001-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9818083&HistoricalAwards=false
• 关键词: Toward; Km; Scale; Neutrino; Observatory

9818083Smoot This project consists of the development and construction of one string of fifty digital optical modules as the prototype for a next-generation neutrino detector array in the glacial ice at South Pole station. It is jointly supported by the NSF's Office of Polar Programs, the Division of Physics, the Division of Astronomical Sciences, and the Office of Multidisciplinary Activities in the Directorate for Mathematics and Physical Sciences. Neutrinos are produced by extremely energetic events in the universe, but interact only weakly with matter and thus require very large detector volumes. When an interaction does occur, it produces Cerenkov radiation in the visible range which can be tracked from the sequential arrival times of the light burst at different optical modules within the ice. Critical to the proper analysis and identification of neutrino events is the data acquisition, local signal processing, and information transfer from deep remote sensors to the surface analysis facility which may involve a path length of several kilometers. The current array of analog optical modules has disadvantages in that dispersion and attenuation degrade the signal quality. Optical fiber cable would preserve waveform information, but is costly and subject to damage during the installation of the module strings. These are frozen in the ice to depths of several kilometers and cannot be recovered for repair.A string of digital optical modules will be robust and reliable, and should provide high quality data from which complex events can be characterized with accurately reconstructed tracks. Operation of the fully instrumented string will be a cost-effective demonstration of the feasibility of implementing a full-scale neutrino telescope based on state-of-the-art digital system architecture.***

9818083SMOOT这个项目包括开发和构建五十个数字光学模块的一串，作为在南极站冰川冰层中下一代中微子检测器阵列的原型。 NSF的极地计划办公室，物理部，天文学科学系以及数学和物理科学局的多学科活动办公室共同支持它。中微子是由宇宙中极为能量的事件产生的，但仅与物质相互作用，因此需要很大的检测器体积。 当确实发生相互作用时，它会在可见的范围内产生Cerenkov辐射，从冰内的不同光学模块的光爆发的顺序到达时间可以跟踪。 对中微子事件的正确分析和识别至关重要的是数据采集，局部信号处理以及从深遥控传感器到表面分析设施的信息传递，该设施可能涉及几公里的路径长度。模拟光学模块的当前阵列在分散体中具有缺点，并且衰减降低了信号质量。 光纤电缆将保留波形信息，但在安装模块字符串期间会造成损坏。 这些被冷冻在冰上到几公里的深度，无法回收以进行维修。数字光学模块的一串将是可靠且可靠的，应该提供高质量的数据，可以从中可以通过精确重建的轨道来表征复杂的事件。 完整仪器的字符串的操作将是基于最先进的数字系统体系结构实施全尺度中微子望远镜的可行性的成本效益。***