摘要
本文介绍了自行研制的一台激光等离子体源飞行时间质谱计.该义器以高能量密度的脉冲激光作用于固体样品,产生的高温等离子体由原位的飞行时间质谱计作质谱分析.该装置具有能同时记录正负离子质谱,智能化程度高、质量分辨好等优点.而且具有较强的研究能力,既能用于原子簇离子的激光产生与质谱研究,又可以对各种无机和有机样品进行结构研究与分析测式.
A laser probe time-of-flight mass spectrometer was designed and built in Xiamen University. In this instrument, the solid sample is vaporized and ionized with a focused pulsed laser beam, and the generated laser plasma is mass analyzed with a time-of-flight mass spectrometer. The instrument features with the unique designe of the location and oreintation of the sample holder relative to the acceleration setup in the spectrometer. With this design, thc surface of the sample is perpendicular to the prob-laser beam and parallel with the acceleration direction off the ions. The advantages of the design are that both positive and negative ions can be mass analyszed coincidently and much better mass resolution is achieved. With the self-writing software and home-made hardwares, the whole instrument is completely under the control of a micro-computer. Since its build-up, the studies carried on this instrument has already got quite a lot interested experimental results in various areas, and some of them were briefly introduced in this paper. During these succesful studies, the instrument has proved its extensive research abilities.
基金
国家教委优秀青年教师研究基金
