A Superthermal Source at NCState University

北卡罗来纳州立大学的超热源

• 批准号: 0314114
• 负责人: Paul Huffman
• 金额: --
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-07-01 至 2010-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0314114&HistoricalAwards=false
• 关键词: Superthermal; Source; NCState; University

We are undertaking a program to construct a world-class, superthermalultracold neutron (UCN) source at a low power, university-basedreactor. In the past five years, research groups at Los Alamos NationalLaboratory and the National Institute of Standards and Technology in theUnited States have made great strides in the development of superthermalUCN sources, demonstrating convincingly that the physics of thesesources is understood. Orders of magnitude improvement in available UCNdensities with superthermal sources may be within reach. The proposedsource will be comparable in strength to essentially all of thefacilities currently being planned in the U.S. and abroad, andconsiderably stronger than any presently operating source. Thecollaboration comprises nuclear physicists involved in fundamentalsymmetries research and nuclear engineers who specialize in reactor coldsource and moderator development. Research programs using low-energyneutrons are driven by the proven usefulness of UCNs for fundamentalnuclear physics measurements, such as placing limits on the staticelectric dipole moments of nucleons and the measurement of the chargedweak current form factors of the nucleon. These measurements haveimpact on some of the deepest and most fundamental questions confrontedby physics today. With the increased UCN flux available at superthermalsources, the development of new applications for UCN as non-destructiveprobes of surface hydrogen layers and large biological molecules mayalso be posssible.

我们正在采取一项计划，以低功率，基于大学的反应器来构建世界一流的超级卢比特中子（UCN）来源。 在过去的五年中，Los Alamos Nationallaboratory和美国国家标准技术研究所的研究小组在SuperThermalucn资料的发展方面取得了长足的进步，这令人信服地表明，这些物理学的物理学已被了解。 可用的具有超热来源的可用UCNDEMENTIS的数量级提高了。 拟议中的资源的实力将与目前在美国和国外计划的所有资产相媲美，并且比目前的任何运营来源都要强大。 调解作用包括参与专门从事反应堆冷水和主持人开发的基础知识研究和核工程师的核物理学家。 使用低能源的研究计划是由UCN对基本核物理学测量值的可靠实用性驱动的，例如对核子的静脉电偶极矩施加限制以及对核子的充电卫生造型效果的测量。 这些测量对当今物理学面临的一些最深，最基本的问题影响。 随着UCN通量增加在SuperThermalSources上可用，将UCN的新应用作为表面氢层的非毁灭性物种和大型生物分子的非毁灭性疾病是可能的。