Optimization of multi-reflection time-of-flight mass analyzer operating in in-trap-lift mode
Optimization of multi-reflection time-of-flight mass analyzer operating in in-trap-lift mode
复制标题
在陷阱提升模式下运行的多重反射飞行时间质量分析仪的优化
DOI：
10.1007/s41605-017-0031-1
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发表时间：
2017
影响因子：
0.6
通讯作者：
Zhou Xiao-Hong
中科院分区：
文献类型：
--
作者：
Huang Wen-Xue;Tian Yu-Lin;Wang Yong-Sheng;Wang Jun-Ying;Zhou Xiao-Hong
目的建立多反射飞行时间质谱仪，用于兰州彭宁圈闭的等压分离。我们的MRTOF质量分析仪在阱内提升模式下工作，其电极上的电位必须进行优化，以实现非常高的质量分辨能力。方法更新了设计和优化MRTOF质谱分析仪的方法，引入了对电位的限制，该方法现在可以用于优化MRTOF质谱仪在镜像切换模式和阱内提升模式下的参数。利用该方法，得到了在阱内提升模式下工作的MRTOF质谱分析仪的最佳电极电位参数。结果与结论当光束直径为2.8 mm，初始平均离子动能为1500 eV时，对ar离子的最大质量分辨能力为7.0 ms。它可以达到0.3毫米直径的光束尺寸。仿真结果表明，施加在最外层镜面电极M1-M2上的电位误差必须小于50ppm，最好是20ppm。
PurposeWe are building an MRTOF-MS (multi-reflection time-of-flight mass spectrometer) for isobaric separation for the Lanzhou Penning Trap. The potentials applied on the electrodes of our MRTOF mass analyzer operating in in-trap-lift mode have to be optimized to achieve a very high mass resolving power.MethodsOur method to design and optimize an MRTOF mass analyzer has been updated to introduce constraints on the potentials, and this method now can be used to optimize the parameters of MRTOF-MS both operating in mirror-switching mode and in in-trap-lift mode. By using this method, the optimal potential parameters of the electrodes have been obtained for our MRTOF mass analyzer operating in the in-trap-lift mode.Results and conclusionWith a beam size of 2.8 mm diameter and an initial average ion kinetic energy of 1500 eV, the maximal mass resolving power has been achieved to bewith a total TOF of 7.0 ms for an ion species ofAr. It can reach up tofor a beam size of 0.3 mm diameter. The simulation shows that the inaccuracy of the potentials applied on the outermost mirror electrodes M1–M2 must be less than 50 ppm or preferably 20 ppm.