The application of a Wien filter to mass analysis of heavy clusters from a pulsed supersonic nozzle source
The application of a Wien filter to mass analysis of heavy clusters from a pulsed supersonic nozzle source
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维恩滤波器在脉冲超音速喷嘴源重团簇质量分析中的应用
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
K. Meiwes
中科院分区：
文献类型：
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作者：
Bu. Wrenger;K. Meiwes
Wien过滤器用于小和大金属团簇离子的质量分析。由于团簇是在超声速膨胀源中产生的，由气动加速获得的初始速度显著影响所测量的峰的位置和宽度。基于离子在交叉磁场和电场中运动的著名理论的计算被扩展到来自超声膨胀的离子。它们允许质量分配，即使对于那些（大）簇，不能明确地在维恩滤波器光谱中解决。
A Wien filter is used for the mass analysis of small and large metal cluster ions. As the clusters are produced in a supersonic expansion source, the initial velocity obtained by gasdynamic acceleration significantly influences the measured peak positions and widths. Calculations based on the well-known theory for ions moving in crossed magnetic and electrical fields are extended to ions from supersonic expansions. They allow a mass assignment even for those (big) clusters which cannot explicitly be resolved in the Wien filter spectrum.