Design for a Megaton-Scale Water Cerenkov Detector for the Deep Underground Science and Engineering Lab

该提案来自加州大学戴维斯分校，要求为为期三年的计划工作提供资金，最终将在DUSEL进行百万吨规模的水切伦科夫探测器和费米实验室的近距离探测器的初步设计。过去十年是中微子物理学和天体物理学领域快速发展的十年。中微子风味振荡已经被发现，这意味着中微子的质量不为零，质量和风味状态是混合的。一些混合参数的精确测量已经完成或正在进行中，新一代的实验旨在测量未知的混合角theta-13，目前正在建设中。对8B和7Be中微子的太阳中微子谱进行了测量，放射化学实验测量了包括pp反应在内的太阳中微子的积分通量。在这些发现的基础上，粒子物理项目优先小组（P5）于2007-08年成立。在HEPAP批准的一份报告中，他呼吁在美国发起一项新的中微子倡议，作为未来十年粒子物理学三管齐下计划的一部分。该计划的旗舰项目将是从费米实验室向南达科塔州DUSEL的大型探测器发射强烈的中微子束。通过与加州大学戴维斯分校的合作协议，该奖项将为这项工作的大部分大学基础部分提供资金，尽管该提案也描述了整个计划工作，包括将在合作的美国国家实验室和或合作的欧洲机构完成的任务。本建议书资助的主要任务包括：安全壳及相关基础设施的初步设计。这包括为建立一个物理和工程师联络小组提供资金，以便与现有的DUSEL S3组织协调这项规划工作。开发探测器模拟和分析工具，以解决探测器优化的关键设计问题，包括光电倍增管覆盖和像素化、否决要求、校准规范、能量阈值和分辨率。光电倍增管的测试和特性，包括具有高QE的新模型。这将包括对聚光器和移波板的使用进行调查。水系统的初步设计，包括支持系统的实际设计，该系统可以处理在水中装载钆以允许检测中子。电子，高压和DAQ系统的初步设计。拟议中的设施的科学目标是广泛的，涉及几个学科，包括恒星天体物理学、太阳物理学、岩土工程和电气工程。该奖项将资助关于探测器的科学目标和工程设计的四个国际研讨会，并将通过LBL支持与DUSEL S3组织合作制定教育和推广计划

This proposal, from the University of California at Davis, requests funds for a three year planning effort that will culminate in a Preliminary Design for a megaton scale water Cherenkov detector at DUSEL and a Near Detector at Fermilab. The last decade has been one of rapid progress in the field of neutrino physics and astrophysics. Neutrino flavor oscillations have been discovered, implying that the mass of the neutrino is non zero and that the mass and flavor states are mixed. Several precision measurements of the mixing parameters have been made or are now in progress, and a new generation of experiments designed to measure the unknown mixing angle theta-13 are now under construction. The neutrino spectrum from the sun has been measured for 8B and 7Be neutrinos, and radiochemical experiments have measured the integral solar neutrino flux including the pp reaction. To build upon these discoveries, the Particle Physics Project Prioritization Panel (P5) in 2007-08. in a report endorsed by HEPAP, called for a new neutrino initiative in the U.S. as part of a three pronged program in particle physics over the next decade. The flagship of this initiative would be an intense neutrino beam from Fermilab to a large detector at the DUSEL in South Dakota. This award, through a Cooperative Agreement with the University of California at Davis, would fund much of the university-based component of this effort, although the proposal also describes the entire planning effort including tasks that will be done at collaborating US national labs and or collaborating European institutions. Major tasks to be funded by this proposal are: Preliminary design for a Containment Vessel and associated infrastructure. This includes funding for establishment of a liaison group of physics and engineers to coordinate this planning effort with the existing DUSEL S3 organization. Development of detector simulations and analysis tools to address crucial design questions on detector optimization, including photomultiplier coverage and pixelization, veto requirements, calibration specifications, and energy threshold and resolution. Testing and characterization of photomultiplier tubes, including new models with high QE. This will include investigation of the use of light concentrators and waveshifter plates. Preliminary design of a water system, including support for a practical design of a system that could handle loading the water with gadolinium to allow detection of neutrons. Preliminary design for electronics, high voltage, and DAQ systems. The scientific goals of the proposed facility are broad, cutting across several disciplines, including stellar astrophysics, solar physics, and geotechnical and electrical engineering. This award will fund four international workshops on the science goals and engineering design of the detector, and will also support formulation of an Education and Outreach Plan in collaboration with the DUSEL S3 organization through LBL