Combined Microprobe and High-Resolution Mass Spectrometer for Materials AgingStudies

摘要

We are developing a new instrument for studying aging effects in materials,especially those that contain interfaces with organic compounds. The intent is to combine the high spatial resolution provided by focused beam probes with the high mass resolution inherent in ion cyclotron resonance (ICR) mass spectrometry. This will make it possible to closely examine interracial zones in complex materials for signs of aging and to unambiguously identify any degradation products as well as the location where they are formed. The instrument consists of a sample analysis chamber coupled to an ICR mass spectrometer (MS). The analysis chamber contains focused laser and ion beam probes, a high precision sample manipulator, a time-of-flight ion detector, and transfer optics to the MS. The ICR-MS is a commercial unit that can be also be used independently for analysis of bulk solids, liquids, and solutions. This paper will give an overview of the instrument, describing it design, capabilities, and current status.