MRI: Acquisition of an Accelerator for Stellar Nucleosynthesis Measurements

MRI：获取用于恒星核合成测量的加速器

• 批准号: 0820883
• 负责人: Michael Wiescher
• 金额: $ 246.44万
• 依托单位: University of Notre Dame
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-01 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0820883&HistoricalAwards=false
• 关键词: MRI; Acquisition; Accelerator; Stellar; Nucleosynthesis

This award will enable acquisition of a state-of-the-art 5MV Pelletron accelerator to continue and significantly expand the broad portfolio of experimental capabilities for the nuclear astrophysics program at the Nuclear Structure Laboratory (NSL) at Notre Dame University. Over the last decades, the nuclear astrophysics program at NSL has gained international prominence with its scientific focus on the study of nuclear reactions at stellar burning conditions. The main goal is to probe low energy fusion reactions critical for stellar hydrogen, helium and carbon burning, using complementary experimental techniques. The new accelerator will significantly enhance the present experimental capabilities of the laboratory, complementing present and future efforts in underground measurements. The new accelerator also will enable the development of inverse kinematics techniques at the newly designed St. George recoil separator using intense low energy, heavy-ion beams. These techniques promise significant advances in efficiency and background reduction for low energy reaction measurements, emerging as a unique alternative or complement to the underground accelerator approach. The 5 MV heavy-ion accelerator opens new research avenues and opportunities that will significantly enhance the laboratory's capability to measure key nuclear reactions at energy conditions close to stellar hydrogen, helium, and carbon burning. A new accelerator, coupled to the recoil mass separator, will make the NSL a unique and world-leading facility for the study of the nuclear processes in all phases of stellar evolution. The NSL operates one of the leading international experimental programs in nuclear astrophysics. The program attracts many collaborators worldwide; in 2007 alone the NSL had 68 outside users from 17 US institutions and 15 foreign countries. The laboratory provides training and education opportunities for a large number of ND graduate students (presently 21) and undergraduate students (15 annually) in nuclear physics with up to 30% minority and female students. Direct access to the accelerator and the opportunity to perform or develop small-scale experiments provides invaluable training. As a consequence, ND students are extremely successful in the job market in industry, academia, and national laboratories. During the summer months, the NSL hosts up to 10 additional undergraduate students and 2 high school teachers with approximately 10-15 high school students through the ND JINA outreach and REU/RET program. The new accelerator also will strengthen the accelerator-based nuclear applications program that was developed at ND over the last five years. This program introduces non-physics faculty to the benefit of new analytical methods in their fields and attracts their students into the NSL to take advantage of new research opportunities.

该奖项将使我们能够收购最先进的5 MV Pelletron加速器，以继续并显着扩展Notre Dame大学核结构实验室（NSL）核天体物理学计划的广泛实验能力。 在过去的几十年里，NSL的核天体物理学计划已经获得了国际知名度，其科学重点是在恒星燃烧条件下的核反应研究。其主要目标是利用互补的实验技术探测恒星氢、氦和碳燃烧的关键低能聚变反应。新的加速器将大大提高实验室目前的实验能力，补充目前和未来在地下测量方面的努力。新的加速器还将使逆运动学技术的发展，在新设计的圣乔治反冲分离器使用强烈的低能量，重离子束。 这些技术有望在低能量反应测量的效率和背景降低方面取得重大进展，成为地下加速器方法的独特替代或补充。 5 MV重离子加速器开辟了新的研究途径和机会，这将大大提高实验室在接近恒星氢、氦和碳燃烧的能量条件下测量关键核反应的能力。 一个新的加速器，再加上反冲质量分离器，将使NSL成为一个独特的和世界领先的设施，用于研究恒星演化的所有阶段的核过程。NSL运行着核天体物理学领域领先的国际实验计划之一。 该计划吸引了世界各地的许多合作者;仅在2007年，NSL就有来自17个美国机构和15个外国的68个外部用户。该实验室为大量ND研究生（目前21名）和本科生（每年15名）提供核物理方面的培训和教育机会，其中少数民族和女性学生高达30%。 直接使用加速器以及执行或开发小规模实验的机会提供了宝贵的培训。 因此，ND学生在工业，学术界和国家实验室的就业市场上非常成功。 在夏季的几个月里，NSL通过ND JINA外展和REU/RET计划接待了多达10名额外的本科生和2名高中教师，以及大约10-15名高中生。 新的加速器还将加强ND在过去五年中开发的基于加速器的核应用计划。 该计划介绍了非物理教师在他们的领域新的分析方法的好处，并吸引他们的学生进入NSL利用新的研究机会。