Towards the Ultimate Performance in Ultra-Low Noise P-type Point Contact Germanium Detectors

迈向超低噪声 P 型点接触锗探测器的终极性能

• 批准号: 1003940
• 负责人: Juan Collar
• 金额: $ 116.38万
• 依托单位: University of Chicago
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-10-01 至 2015-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1003940&HistoricalAwards=false
• 关键词: Towards; Ultimate; Performance; Ultra; Low

Recent experimentation with P-type Point Contact (PPC) gemanium detectors has lead to the identification of several residual sources of electronic noise presently limiting their energy resolution and sensitivity to small energy depositions. This award will provide funding for their systematic investigation and abatement, resulting in improved fabrication, packaging and read-out methods. The deliverables are expected to be a) a new germanium technology combining the virtues of ultra-low noise X-ray and high-efficiency gamma spectroscopies into a single radiation detector and b) the development of manufacturing techniques that lead to a reproducible, reliable optimal PPC performance making detectors that match an industry standard. The broader impacts are expected to be multiple, in providing training to students and by demonstrating fundamental, applied and commercial uses for a new generation of germanium detectors with unmatched capabilities. The group plans to advance their use for a) the monitoring of nuclear power facilities against undeclared diversion of fissile materials, b) improved sensitivity in air monitoring systems supporting the Comprehensive Test Ban Treaty, c) the implementation of a novel background rejection capability in commercial PPCs and d) further improvement of PPC sensitivity to a number of light dark matter candidates via a dedicated search at the Soudan underground laboratory.

最近对p型点接触（PPC）锗探测器的实验已经导致识别出几个残余的电子噪声源，目前限制了它们的能量分辨率和对小能量沉积的灵敏度。该奖项将为他们的系统调查和减少提供资金，从而改进制造，包装和读出方法。交付成果预计将是a)一种新的锗技术，将超低噪声x射线和高效伽马能谱的优点结合到一个单一的辐射探测器中；b)制造技术的发展，导致可重复的，可靠的最佳PPC性能，使探测器符合行业标准。更广泛的影响预计将是多方面的，为学生提供培训，并通过展示具有无与伦比能力的新一代锗探测器的基础，应用和商业用途。该小组计划推进它们在以下方面的应用：a)监测核动力设施，防止未申报的裂变材料转移；b)提高支持《全面禁止核试验条约》的空气监测系统的灵敏度；c)在商业PPC中实施一种新的本底排斥能力；d)通过在苏丹地下实验室的专门搜索，进一步提高PPC对一些轻暗物质候选物质的灵敏度。