MRI-R2: Development of A High-Performance Gas-Filled Cyclotron Stopper

MRI-R2：高性能充气回旋加速器塞的开发

• 批准号: 0958726
• 负责人: David Morrissey
• 金额: $ 328.08万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-04-01 至 2013-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0958726&HistoricalAwards=false
• 关键词: MRI; R2; Development; Performance; Gas

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This award will support the development of a new and unique device, at the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University, to capture short-lived isotopes produced in nuclear reactions that will facilitate a wide range of new nuclear science. The NSCL is the forefront facility in the US for nuclear science using fast projectile fragments (GeV kinetic energies) and is the world leader in the thermalization and precision mass measurements of these projectile fragments. Nearly a fifth of the chemical elements have been thermalized and measured at the NSCL in the last four years. The NSCL is currently building on this success by expanding its experimental arena for precision studies with thermalized projectile fragments to include laser spectroscopy and, in a major step forward, to low-energy nuclear reactions. Funds from this award will be used to develop a robust gas-stopping concept for projectile fragments, particularly for light-ion and high intensity beams that will be difficult to produce with existing technology. The new gas stopper will slow down and thermalize very high-energy projectile fragments in a large gas filled chamber inside a cyclotron-type magnet. Such a gas-filled cyclotron stopper will be able to provide thermalized ions without regard to their chemical nature, with half-lives as short as tens of milliseconds, and at high incident rates. The development of a novel technique to slow down, capture, and extract these difficult beams using a gas-filled reverse-cyclotron will thus have broad impact by: (1) providing the wide range of beams required for the next generation of precision mass measurements and laser spectroscopy at the NSCL, and (2) allowing unique studies of low-energy nuclear reactions with intense beams of short-lived isotopes that are not available anywhere else in the world. The proposed work will be performed by a collaboration of researchers at MSU, RIKEN (in Japan) and GSI (in Germany) and includes the creation of a break-through device on a three-year timescale. This collaboration has significant expertise in all aspects of the work and the project will foster the technical and scientific exchange among these laboratories. The cyclotron-stopper will be constructed at the NSCL and installed on a dedicated beam line for full-scale testing and subsequent connection to the low-energy arena and re-accelerator. This instrumentation will be a critical component of the NSCL-based research program of many students and postdoctoral scholars.

该奖项是根据2009年的《美国回收与再投资法》（公法111-5）资助的。该奖项将支持密歇根州立大学的国家超导性回旋实验室（NSCL）的新型和独特设备的开发，以捕捉在核反应中产生的短期同位素，这将有助于促成广泛的核科学范围。 NSCL是美国使用快速弹丸碎片（GEV动能）的美国核科学领域的最前沿设施，并且是这些弹丸碎片的热质量和精确质量测量的世界领导者。 在过去的四年中，几乎五分之一的化学元素已在NSCL上进行了热效和测量。 NSCL目前正在基于这一成功的基础，通过扩展其实验领域，用于具有热弹片段的精确研究，以包括激光光谱法，并在重大的一步中向低能量的核反应提出。该奖项的资金将用于为弹丸碎片开发强大的加油概念，尤其是用于光 - 离子和高强度梁，这将很难使用现有技术生产。 新的气体阻塞器将在一个大型气体型磁铁内的大气体室内放慢速度并热能高能弹丸碎片。 这种充气的回旋器塞子将能够提供热离子而不考虑其化学性质，其半衰期为几十毫秒，并且以高入射率为单位。 The development of a novel technique to slow down, capture, and extract these difficult beams using a gas-filled reverse-cyclotron will thus have broad impact by: (1) providing the wide range of beams required for the next generation of precision mass measurements and laser spectroscopy at the NSCL, and (2) allowing unique studies of low-energy nuclear reactions with intense beams of short-lived isotopes that are not available anywhere else in the world.拟议的工作将由MSU，Riken（在日本）和GSI（在德国）的研究人员合作进行，其中包括在三年的时间表上创建突破性设备。这项合作在工作的各个方面都具有重要的专业知识，该项目将促进这些实验室之间的技术和科学交流。 Cyclotron-Stopper将在NSCL上构建，并安装在专用的梁系列上，以进行全尺度测试，并随后连接到低能竞技场和重新加速器。该仪器将是许多学生和博士后学者的基于NSCL的研究计划的关键组成部分。