Support for GeoCAMS: An Accelerator Mass Spectrometry Facility for Earth Science Research

0217981Finkel这笔赠款将为GeoCAMS的运行提供两年的部分支持，GeoCAMS是劳伦斯利弗莫尔国家实验室加速器质谱中心（CAMS）的FN串联货车de Graaff加速器的地球科学组成部分，作为地球科学同位素研究的设施。在十年的成功运作中，GeoCAMS已经开发并展示了测量3H，7，10 Be，26 Al，36 Cl和129 I的能力，以及在陨石中发现的41 Ca水平。GeoCAMS已经测量了15，000个10Be靶，9400个26Al靶，9800个36Cl靶，300个41Ca靶和较少数量的3H，7Be和129I靶。 GeoCAMS是由美国能源部和加州大学资助建造的，已经为许多NSF PI提供服务，其中包括过去一年中的20多个，事实上，它已经成为NSF地球科学的AMS测量设施。在此期间，GeoCAMS在教育方面发挥了关键作用。27个博士在GeoCAMS培训了100名学生和7名硕士生。 在过去的几年里，美国大学建立的大多数新的表面暴露测年实验室都是由GeoCAMS培训的年轻教师创办的。 与此同时，GeoCAMS的工作人员还在古气候、冰芯研究、地球表面过程和大气混合方面进行了广泛的地球科学研究。 该提案的目标是使GeoCAMS设施，这是额定在或接近世界各地的顶级设施，提供给NSF地球科学界，同时继续提高现有的性能，并增加新的核素，如原位14 C和53 Mn的能力。***

0217981FinkelThis grant will provides two years partial support for the operation of GeoCAMS, the Earth Science component of the FN tandem van de Graaff accelerator at the Lawrence Livermore National Laboratory Center for Accelerator Mass Spectrometry (CAMS) as a facility for isotopic studies in the Earth Sciences. In ten years of successful operation, GeoCAMS has developed and demonstrated capabilities to measure 3H, 7,10Be, 26Al, 36Cl, and 129I at levels found in terrestrial samples and 41Ca at levels found in meteorites. GeoCAMS has measured 15,000 10Be targets, 9400 26Al targets, 9800 36Cl targets, 300 41Ca targets and a lesser number of 3H, 7Be and 129I targets. GeoCAMS, built with DOE and UC funds, has served numerous NSF PIs, including more than twenty during the past year, and has, de facto, come to serve NSF Earth Sciences as a facility for AMS measurements. During this time GeoCAMS has played a key role in education. Twenty-seven Ph.D. students and seven master's students have been trained at GeoCAMS. The large majority of the new surface exposure dating labs set up at U.S. universities during the past few years have been started by young faculty trained at GeoCAMS. In parallel to the facility capability supported by this grant, a wide range of Earth science research in paleoclimate, ice core research, Earth surface processes and atmospheric mixing is carried out by GeoCAMS staff. The goal of this proposal is to make the GeoCAMS facility, which is rated at or near the top of such facilities worldwide, available to the NSF Earth Science community while at the same time continuing to improve the existing performance and to add capabilities for new nuclides, such as in-situ 14C and 53Mn. ***