Acquisition of an X-ray diffraction unit for earth science research and education at the University of Wisconsin, Madison

威斯康星大学麦迪逊分校购买 X 射线衍射装置用于地球科学研究和教育

• 批准号: 0824890
• 负责人: Huifang Xu
• 金额: $ 14.83万
• 依托单位: University of Wisconsin-Madison
• 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: 2008-09-15 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0824890&HistoricalAwards=false
• 关键词: Acquisition; ray; diffraction; unit; earth

0824890XuThis proposal seeks funding to purchase a new X-ray diffraction (XRD) instrument. The current 20 year old instrument has developed electrical problems and suffers from unreliable background stability. The manufacturer of the current instrument has since gone out of business and no support options are available. The requested upgrade will be capable of general powder X-ray diffraction, micro-diffraction, and wide angle X-ray scattering. Also proposed is a 2-D image plate detector system. XRD is a common technique for studying Earth and extraterrestrial materials. The research team will put the requested instrument into service to 1) better understand mineralogical signals indicative of supporting life found in Earth and planetary samples, 2) better understand rock-water interactions through mineral signatures, 3) determine biosignatures in Earth and planetary rocks, 4) understand the role of microbes in mediating redox reactions in Fe-bearing clays and Fe-oxides in addition to U(IV) mineral formation and redox processes in the subsurface, and 5) quantitatively survey clay, carbonate and feldspar/quartz mineralology in glacial tills, eolian sediments, and lacustrine deposits in order to reconstruct paleoclimatic changes. The new instrument will be housed in current X-ray Diffraction Laboratory at UWM. Current infrastructure (cooling water, AC, power, distilled water, etc) is in place to support the acquisition. A 50%-time XRD lab manager will support operation and is supervised by the PI. The lab manager will train new users, provide tech support, maintain the XRD and associated instruments, develop techniques and keep general records. A first-come, first-serve web-based sign up system is in place for the current instrument and will continue to be used. Users pay an hourly fee. The fees support 25% of the FTE lab manager and maintenance costs. The old instrument will be kept for training purposes.***

0824890Xu本提案寻求资金购买新的X射线衍射（XRD）仪器。目前已有 20 年历史的仪器已出现电气问题，并且背景稳定性不可靠。当前仪器的制造商已经停业，并且没有可用的支持选项。所要求的升级将能够进行一般粉末 X 射线衍射、微衍射和广角 X 射线散射。还提出了一种二维图像板检测器系统。 XRD 是研究地球和外星材料的常用技术。研究小组将把所需的仪器投入使用，以：1）更好地了解表明地球和行星样本中存在生命的矿物学信号，2）通过矿物特征更好地了解岩石与水的相互作用，3）确定地球和行星岩石中的生物特征，4）了解微生物在介导含铁粘土和铁氧化物中的氧化还原反应以及U（IV）矿物形成和氧化还原过程中的作用。 地下，5) 定量调查冰川沉积物、风成沉积物和湖泊沉积物中的粘土、碳酸盐和长石/石英矿物学，以重建古气候变化。新仪器将安装在威斯康星大学现有的 X 射线衍射实验室中。目前的基础设施（冷却水、空调、电力、蒸馏水等）已到位以支持收购。 50% 时间的 XRD 实验室经理将支持运营并由 PI 监督。实验室经理将培训新用户、提供技术支持、维护 XRD 和相关仪器、开发技术并保存一般记录。当前仪器采用先到先得的基于网络的注册系统，并将继续使用。用户按小时付费。这些费用支持 25% 的 FTE 实验室经理和维护成本。旧仪器将保留用于培训目的。***