辉光放电飞行时间质谱仪离子光学系统的改进及其性能的初步测试

Study on a Ion Optic System for Glow Discharge Time of Flight Mass Spectrometer

摘要: 本文介绍一种经过改进的离子光学系统，并用于垂直引出式辉光放电飞行时间质谱仪。初步研究了它的性能，包括吸引锥、透镜、直流四极杆、狭缝电位变化时对仪器灵敏度与分辨率的影响，并检测了黄铜样品谱图。结果表明，该系统不仅能有效地提高离子的传输效率，提高灵敏度，而且能减少高手的空间分散，改善分辨本领，同时对于质谱仪的真空系统性能的提高也有很大的作用。

Abstract: A modified ion optic system has been developed and used to a orthoranal glow discharge time of flight mass spectrometer (GD -TOFMS). The performance of the ionic optics, including the effects of different potential of extracting cone, len8, DCquadrupo1es and slit on the intensity and resolution of spectra, was investegated. The spectra of brass sample were also studied. It has been shown that the ion optics can not only increase the ion translated efficiency,but aIso improve the resolving power and vacuum of the mass spectrometer.