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热表面电离源质谱计虽然已广泛地用于元素的同位素比值测定,但要获得优于0.1％的精度却是困难的。离子源的好坏对质谱的性能起着重要的作用。ZhT-1301型质谱计唯一的单带热离子源在设计上缺陷很多,每做一个样品要拆装一次源,又拆卸十分不便,在每次装源中难以保证原有的几何位置,这样就严重地影响了各次的测量重复性。同时由于多次拆卸,除延长装源的时间外,还会带来零件的耗损、毁坏、降低离子源的装配精度,甚至会造成整个源的报废。考虑到ZhT-1301型质谱计离子源的原有结构,在不破坏原有的离子光学聚焦性能的基础上,等已进行了改装。
Although hot surface ionization mass spectrometry has been widely used for elemental isotope ratio measurement, it is difficult to obtain better than 0.1% accuracy. The quality of the ion source plays an important role in the performance of the mass spectrometer. ZhT-1301-type mass spectrometer the only single with a thermal ion source in the design of a lot of defects, each to do a sample to disassemble a source, but also very inconvenient demolition in each loading source is difficult to ensure the original geometric location, so that Seriously affected the measurement repeatability. At the same time as many disassembly, in addition to extending the loading time, but also bring parts wear and tear, reducing the assembly accuracy of the ion source, or even cause the entire source of scrap. Taking into account the original structure of ZhT-1301 mass spectrometer ion source, without prejudice to the original ion optical focusing based on the performance, etc. have been modified.