MRI: Construction of One Layer of a Highly Efficient Neutron Detector to Study Neutron-Rich Rare Isotopes at the NSCL

MRI：构建一层高效中子探测器来研究 NSCL 的富中子稀有同位素

• 批准号: 0132532
• 负责人: Joseph Finck
• 金额: $ 9.11万
• 依托单位: Central Michigan University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0132532&HistoricalAwards=false
• 关键词: MRI; Construction; Layer; Highly; Efficient

The consortium between Michigan State University and Florida StateUniversity proposes the construction of a highly efficient,large-area neutron detector for the detection of high-energyneutrons to be used in experiments with fast rare isotopes at theNational Superconducting Cyclotron Laboratory (NSCL). Thisconsortium is joined by Ball State University, Central MichiganUniversity, Concordia College in Moorhead, Minn., Hope College,Indiana University at South Bend, Millikin University, WesternMichigan University, and Westmont College, each of which willassemble and test one complete layer of the detector.The proposed detector consists of 144 horizontal blocks of plasticscintillator arranged in 9 layers of 16 detectors each, covering anarea of 2.0 m wide by 1.6 m high. The detector is positionsensitive and features multi-hit capability. The addition ofpassive iron converters enhances the detection efficiency forneutrons with energies above 100 MeV for an average efficiency of upto 70%. The high detection efficiency will allow the investigationof very neutron-rich nuclei that can only be produced with smallintensities.The detector will be used in connection with the new sweeper magnetwith its focal plane detectors in stand-alone mode as well as withthe combination of sweeper magnet and the S800 magneticspectrograph. It will therefore be essential for the experimentalprogram at the coupled cyclotron facility. The detector can beoptimized for even higher beam energies with only minormodifications due to its modular design. It could be the firstdetector to be used for fast fragmentation beams at the Rare Isotope.

密歇根州立大学和佛罗里达州立大学之间的联盟提议建造一个高效、大面积的中子探测器，用于探测高能中子，用于国家超导回旋加速器实验室（NSCL）的快速稀有同位素实验。该联盟由鲍尔州立大学、中密歇根大学、明尼苏达州莫尔黑德的康考迪亚学院、霍普学院、南本德印第安纳大学、米利金大学、西密歇根大学和韦斯特蒙特学院加入，每所大学都将组装和测试探测器的完整一层。拟议的探测器由 144 个水平塑料闪烁体块组成，每 9 层排列 16 个探测器，覆盖 面积为 2.0 m 宽 x 1.6 m 高。 该探测器对位置敏感并具有多次命中能力。 添加无源铁转换器可提高能量高于 100 MeV 的中子的探测效率，平均效率高达 70%。 高探测效率将允许研究只能以小强度产生的非常富中子的核。该探测器将与新型扫频磁体及其焦平面探测器以独立模式结合使用，以及扫频磁体和 S800 磁谱仪的组合。 因此，这对于耦合回旋加速器设施的实验计划至关重要。由于其模块化设计，探测器只需进行少量修改即可针对更高的光束能量进行优化。 它可能是第一个用于稀有同位素快速碎片束的探测器。