摘要: This report focuses on the performance of a Kratos TOF-SIMS reflectron-based mass spectrometer equipped with a liquid metal ion gun. The analyzer exhibits a nominal mass resolution of better than 1 part in 10,000 with a transmissi... 展开 This report focuses on the performance of a Kratos TOF-SIMS reflectron-based mass spectrometer equipped with a liquid metal ion gun. The analyzer exhibits a nominal mass resolution of better than 1 part in 10,000 with a transmission of about 50%. The secondary ion extraction optics has been optimized for laser postionization where there is a large ionization volume, and for SIMS where the ions originate from a point source on the surface. Experiments with benzopyrene have suggested that it is possible to improve upon the ionization efficiency of molecular species by moving into the subpicosecond regime. 收起