Electron beam microprobe analyzer

电子束微探针分析仪

• 批准号: 525139682
• 金额: --
• 依托单位: Freie Universität Berlin
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2023
• 资助国家: 德国
• 起止时间: 2022-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/525139682?language=en
• 关键词: Electron; beam; microprobe; analyzer

The chemical analysis of major and minor elements with high spatial resolution in the micrometer range is of fundamental importance for all participating working groups. Both the workload and the variety of current and past research projects of the different working groups show the need for a functioning and modern equipped microprobe laboratory. The current equipment dates from 2005, the mechanics of the sample stage and spectrometers no longer provide the required reproducibility, and the beam current is increasingly unstable. At the same time, the supply of spare parts is becoming increasingly difficult, downtime due to necessary repairs is increasing, and regular operation is becoming increasingly difficult to ensure. The needs of the participating working groups for electron beam microprobe analysis with an instrument of the latest generation are described in detail. The main focus is, besides the chemical analysis of major and minor elements, the quantification of mineral chemical zonation, partly also in the submicrometer range, a high measurement accuracy at low element concentrations, the investigation of extraterrestrial material as well as sample characterization as an essential, preparatory step for further analyses (e.g. various mass spectrometric measurements).

在微米范围内以高空间分辨率对主要元素和微量元素进行化学分析对于所有参与工作组都至关重要。 不同工作组当前和过去研究项目的工作量和多样性都表明需要一个功能齐全且配备现代化的微探针实验室。目前的设备是 2005 年的，样品台和光谱仪的机械结构不再提供所需的再现性，并且束流越来越不稳定。与此同时，备件供应越来越困难，因必要维修而导致的停机时间越来越多，正常运行越来越难以保证。详细描述了参与工作组对使用最新一代仪器进行电子束微探针分析的需求。除了主要和次要元素的化学分析之外，主要重点还包括矿物化学分区的量化（部分也在亚微米范围内）、低元素浓度下的高测量精度、外星物质的研究以及样品表征进一步分析（例如各种质谱测量）的必要准备步骤。