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首页> 外文期刊>IEEE Transactions on Instrumentation and Measurement >Performance Simulation of a Quadrupole Mass Filter Operating in the First and Third Stability Zones
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Performance Simulation of a Quadrupole Mass Filter Operating in the First and Third Stability Zones

机译：在第一和第三稳定区运行​​的四极质量过滤器的性能模拟

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摘要

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 ($a approx 0.237$ and $q approx 0.706$) and zone 3 ($a approx 3.16$ and $q approx 3.23$) 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 $r/r0$.
机译：描述了一种精确模拟四极质量过滤器（QMF）性能的计算方法。通过确定大量离子$（10 ^ {8}）$注入到QMF中时的各个轨迹来描述行为。对于区域1（$ a约0.237 $和$ q约0.706 $）和区域3（$ a约3.16），研究了圆形电极半径$ r $与电场半径$ r0 $之比对性能特性的影响。 $和$ q约3.23 $）。我们证明，区域3对$ r / r0 $比率的性能敏感性与先前报告的区域1有所不同。对于区域1而言，质谱峰形状中“尾部”的幅度和变化大大降低了适用于3区，并且不影响QMF分辨率。还介绍了当在区域1和3中以$ r / r0 $几何比率变化时，离子轨迹和相关功率空间频谱的变化。我们证明了这些为确定$ r / r0 $的理想值提供了另一种方法。

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