Acquisition of a New Electron Microprobe for The University of Arizona

[0841669] drake2009年美国复苏与再投资法案（公法111-5）为该奖项提供资金。该提案寻求50万美元（总成本的1/2）的资金来购买一个新的电子微探针。NASA将在另一项单独的资助行动中资助另外50%。目前的Cameca SX50探测器已经使用了18年，使用时间很长（每月400小时），并支持来自UA和其他美国，外国和社区机构的用户。在过去的17年里，目前的仪器已经为265多篇同行评审的出版物、75篇博士论文和35篇硕士论文提供了数据。由于维护问题和更换零件变得越来越困难，目前的仪器已经看到停机时间增加。要求的是一种新型Cameca微探头，配备波长色散光谱仪（WDS）、能量色散光谱仪（EDS）、不间断电源（UPS）和再循环冷水机。新仪器将被安置在现有的设备中。UA将为重建提供资金。PI将全面负责此次收购，而co-PI将是设备经理，并由国家全额资助。该探测器将在UA的几个正在进行的研究项目中发挥重要作用。要解决的问题包括了解地球和其他行星？通过矿物学和地球化学确定地球和其他类地行星的早期热史，确定地球和其他类地行星的物质组成和性质，通过球粒陨石分析了解早期行星吸积，了解原始无球粒陨石，确定早期太阳系的大尺度混合和低温成分，确定太阳系年代学，热力学，与地球行星过程相关的相平衡和扩散动力学，U-Th-Pb地质年代学和开发其他计时器和热计时器，矿产资源识别和构造学。该仪器的考古应用包括了解早期人类环境，追踪冶金和陶瓷在早期文明中的发展、采用和传播。此次收购将取代并增强广泛使用的大学和协作资源的能力。该设施将对外开放。* * *

0841669DrakeThis award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). This proposal seeks $500K (1/2 total cost) in funding to acquire a new electron microprobe. NASA will fund the other 50% in a separate funding action. The current Cameca SX50 probe is 18 years old, heavily used (400 hours / month), and has supported users from UA and other US, foreign and community institutions. Over the past 17 years, the current instrument has provided data in over 265 peer-reviewed publications, 75 PhD theses and 35 M.S. theses. The current instrument has seen increased downtime due to maintenance issues and replacement parts are becoming difficult, if even possible, to find. Requested is a new Cameca microprobe with Wavelength Dispersive Spectrometers (WDS), an Energy Dispersive Spectrometer (EDS), an Uninterruptible Power Supply (UPS), and re-circulating water chiller. The new instrument will be housed in the existing facility. UA will provide funds for remodeling. The PI will have overall responsibility for the acquisition while co-PI will be the facility manager and be fully-funded by the state. The probe will be instrumental in several on-going research projects at UA. Questions to be addressed include understanding Earth and other planet?s history though mineralogy and geochemistry, determining the early thermal history of Earth and other terrestrial planets, determining the material composition and properties of Earth and other terrestrial planets, understanding early planetary accretion through chondrite analysis, understanding primitive achondrites, determining large-scale mixing and low-temperature components in the early solar system, determining solar system chronology, thermodynamics, phase equilibrium and diffusion kinetics related to terrestrial planetary processes, U-Th-Pb geochronology and developing other chronometers and thermochronometers, mineral resource identification and tectonics. Archeological applications for the instrument include understanding early human environments and tracing metallurgic and ceramic development, adoption and spread in early civilizations. This acquisition will replace and enhance the capabilities of a widely-used University and collaborative resource. The facility will be open to outside users. ***