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首页> 外文期刊>The Analyst: The Analytical Journal of the Royal Society of Chemistry: A Monthly International Publication Dealing with All Branches of Analytical Chemistry >Ion manipulations in structures for lossless ion manipulations (SLIM): computational evaluation of a 90 degrees turn and a switch
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Ion manipulations in structures for lossless ion manipulations (SLIM): computational evaluation of a 90 degrees turn and a switch

机译：用于无损离子处理（SLIM）的结构中的离子处理：90度转弯和开关的计算评估

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摘要

The process of redirecting ions through 90 degrees turns and 'tee' switches utilizing Structures for Lossless Ion Manipulations (SLIM) was evaluated at 4 Torr pressure using SIMION simulations and theoretical methods. The nature of pseudo-potential in SLIM-tee structures has also been explored. Simulations show that 100% transmission efficiency in SLIM devices can be achieved with guard electrode voltages lower than similar to 10 V. The ion plume width in these conditions is similar to 1.6 mm while at lower guard voltages lead to greater plume widths. Theoretical calculations show marginal loss of ion mobility resolving power (<5%) during ion turn due to the finite plume widths (i.e. race track effect). More robust SLIM designs that reduce the race track effect while maximizing ion transmission are also reported. In addition to static turns, the dynamic switching of ions into orthogonal channels was also evaluated both using SIMION ion trajectory simulations and experimentally. Simulations and theoretical calculations were in close agreement with experimental results and were used to develop more refined SLIM designs.
机译：使用SIMION模拟和理论方法，在4 Torr压力下评估了利用无损离子操纵结构（SLIM）将离子重定向90度转弯和“ T型”开关的过程。还研究了SLIM-tee结构中伪电位的性质。仿真表明，在保护电极电压低于10 V的情况下，SLIM器件可以实现100％的传输效率。在这些条件下，离子羽流宽度类似于1.6 mm，而在较低的保护电压下，离子羽流的宽度更大。理论计算表明，由于有限的羽流宽度（即跑道效应），在离子转向期间离子迁移率分辨力的边际损失（<5％）。还报告了更健壮的SLIM设计，这些设计可以减少跑道效应，同时最大限度地提高离子传输。除静态转向外，还使用SIMION离子轨迹模拟和实验方法评估了离子向正交通道的动态切换。仿真和理论计算与实验结果非常吻合，被用于开发更精细的SLIM设计。

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