期刊
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
卷 57, 期 3, 页码 498-508出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIM.2007.911632
关键词
mathieu stability regions; multipoles; power frequency spectrum; quadrupole mass filter (QMF); spatial frequencies
A method of computation that accurately simulates the performance of quadrupole mass filters (QMFs) is described. Behavior is described by determining the individual trajectories of a large number of ions (10(8)) as they are injected into the QMF. The effects of the ratio of circular electrode radius r to electric field radius r0 on the performance characteristics have been investigated for zone 1 (a approximate to 0.237 and q approximate to 0.706) and zone 3 (a approximate to 3.16 and q approximate to 3.23) operation. We demonstrate that performance sensitivity to the r/r0 ratio is different for zone 3 than those previously reported for zone 1. The magnitude and variation of the tail in the mass spectral peak shapes that are apparent for zone 1 is much decreased for zone 3 and does not influence QMF resolution. Variation in ion trajectories and associated power-spatial frequency spectra when operated in zones 1 and 3 with varying r/r0 geometrical ratios are also presented. We demonstrate that these provide an alternative method in determining an ideal value for r/r0.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据