矩形离子阱质量分析过程的数值模拟

传统的四极离子阱质量分析器中离子的运动可用二阶线性微分方程——Mathieu方程的解来描述。根据Mathieu稳定图所反映的离子运动特性,可实现离子的质谱分析。但Mathieu方程对平板电极的矩形离子阱描述不再准确适用,本文通过数值模拟的方法,依次对矩形离子阱质量分析器内电场分布、离子运动轨迹、离子阱的Mathieu稳定图以及标准工作模式下获得的质谱图进行了模拟和分析。

Modeling and Simulation of Mass Spectrum of Rectangular Ion-Trap

Here we addressed the simulation and the numerical solution of the ion motions in a rectangular ion trap,produced by the planar electrodes in a quadruple ion-trap mass spectrometer.It is well recognized that when it comes to the rectangular ion trap,the conventional Mathieu Equation fails to characterize the motion of ion in such a trap.In the simulation,the impacts of the conditions involved in mass spectroscopy analysis,including the electric field distribution and trajectories of ions,on ion mass spectro...