Electron beam microprobe analyzer

对在微米范围内具有高空间分辨率的主要和次要元素进行化学分析对所有参加工作组来说都是至关重要的。不同工作组的工作量以及当前和过去的各种研究项目都表明，有必要建立一个运转良好、装备现代化的微型探头实验室。目前的设备是从2005年开始的，样品台和光谱仪的机械结构不再提供所需的重复性，束流越来越不稳定。与此同时，备件供应越来越难，因必要维修而停机的时间越来越多，正常运行越来越难保证。详细介绍了参加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。主要的重点是，除了主要和次要元素的化学分析外，部分也在亚微米范围内的矿物化学分区的量化，在低元素浓度下的高测量精度，调查地外物质以及样品表征，作为进一步分析(例如各种质谱学测量)的基本准备步骤。

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).