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圆环离子阱由于其离子储存能力明显优于相同体积下的三维离子阱,近年来被认为是离子阱小型化发展的另一个重要方向。为进一步优化圆环形离子阱的质谱性能,特别是质量分辨能力,本研究提出了一种由三角形电极构建的新型圆环离子阱,它由两个完全等同的、截面为三角形的圆环电极及两个大小不等的圆筒型电极所组成,离子通过共振激发方式弹出。通过理论模拟和对电极结构的优化,获得了具有非对称性的三角形电极结构,通过改善圆环结构,优化电场分布,提高了离子引出效率和离子阱的质量分辨能力,其中一种最优化结构的圆环离子阱对m/z 609离子的质量分辨率达到1486。
In recent years, toroidal ion traps have been considered as another important direction for the miniaturization of ion traps in recent years due to their significantly better ion storage capacity than three-dimensional ion traps under the same volume. In order to further optimize the mass spectrometry performance of circular ion traps, especially for mass resolution, a new type of toroidal ion trap constructed by a triangular electrode is proposed, which consists of two completely identical toroidal electrodes And two cylindrical electrodes of different sizes. The ions are ejected by resonance excitation. Through theoretical simulation and optimization of the electrode structure, an asymmetric triangular electrode structure is obtained, and the ring structure is optimized and the electric field distribution is optimized to improve the ion extraction efficiency and the mass resolution capability of the ion trap. One of the most optimized structures The ring ion trap has a mass resolution of 1486 for the m / z 609 ion.