Acquisition of a cathodoluminescence detector to increase imaging capability of existing SEM facility, Department of Geoscience, University of Iowa

购买阴极发光探测器以提高爱荷华大学地球科学系现有 SEM 设施的成像能力

基本信息

批准号：
1038684
负责人：
William McClelland
金额：
$ 7.49万
依托单位：
University of Iowa
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2011
资助国家：
美国
起止时间：
2011-10-01 至 2012-09-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1038684&HistoricalAwards=false
关键词：
Acquisition cathodoluminescence detector increase imaging

项目摘要

1038684McClellandThis grant supports acquisition of a cathodoluminescence (CL) spectrometer which will be mated to an existing variable pressure scanning electron microscope (SEM) in the Department of Geosciences at the University of Iowa. CL imaging will support studies of mineral growth history by allowing for visualization and mapping of crystal zoning and microstructural characteristics. CL scanning using an SEM will support subsequent targeted elemental analysis and/or isotopic analysis of distinct growth rims using other electron microscopy techniques, secondary ion mass spectrometery or laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). The instrument will complement a recently NSF MRI supported laser ablation ICP-MS facility in the Department of Geoscience for zircon geochronology and trace element zonation in minerals and support a range of research in igneous and metamorphic petrology, impact processes, and analysis of clastic sedimentary and carbonate phases to elucidate the environmental conditions at the time of their deposition. The CL microscope will support student research training across multiple departments on campus and the PIs seek to attract underrepresented students through an extant Alliance for Graduate Education and Professoriate (AGEP) program and a NASA Education grant targeted at encouraging undergraduate women to pursue science careers. The instrument will also support collaborative research with faculty and students from nearby Cornell College, a regional liberal arts institution. ***

1038684McClelland 这笔赠款支持购买一台阴极发光 (CL) 光谱仪，该光谱仪将与爱荷华大学地球科学系现有的变压扫描电子显微镜 (SEM) 配套。 CL 成像将通过实现晶体分区和微观结构特征的可视化和绘图来支持矿物生长历史的研究。使用 SEM 的 CL 扫描将支持使用其他电子显微镜技术、二次离子质谱或激光烧蚀电感耦合等离子体质谱 (LA-ICP-MS) 对不同生长边缘进行后续的目标元素分析和/或同位素分析。该仪器将补充地球科学部最近由 NSF MRI 支持的激光烧蚀 ICP-MS 设施，用于锆石地质年代学和矿物中的微量元素分带，并支持火成岩和变质岩石学、冲击过程以及碎屑沉积岩和碎屑沉积岩分析等方面的一系列研究。碳酸盐相来阐明其沉积时的环境条件。 CL 显微镜将支持校园多个部门的学生研究培训，PI 寻求通过现有的研究生教育和教授联盟 (AGEP) 计划以及旨在鼓励本科女性从事科学职业的 NASA 教育补助金来吸引代表性不足的学生。该仪器还将支持与附近的地区文科机构康奈尔学院的教师和学生的合作研究。 ***