In this paper, the shapes of the electrodes are modified based on a rectilinear ion trap to achieve unidirectional ejection of ions. The designed asymmetric rectilinear ion trap (ARIT) analyzer adds convex and concave circular structures with a height of 0.5 mm on the two X‐electrodes, so that the electric field center of the ion trap is inclined to the concave side. The electric field lines of the convex side are compressed to the concave side. Both simulations and experimental results show that ions are more likely to emit from the slit on the concave side plate when performing ion resonance ejection. The mass spectrum signal intensity can reach more than twice that of the original rectilinear trap when using only one detector. Calculations of the electric field components in the trap show that the even‐order higher field proportion in the ion trap has not been significantly affected. Combined with the experimental test results, the study further confirmed that the developed ARIT has no significant loss in mass resolution, tandem mass spectrometry capability, and quantitative analysis capability. The proposed asymmetric structure modification scheme can achieve single‐side ejection without significantly affecting other performances of the analyzer, which provides a new idea for the structural optimization of the subsequent ion trap analyzers.

中文翻译：

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具有单向离子喷射能力的非对称直线离子阱。

在本文中，基于直线离子阱修改了电极的形状，以实现离子的单向喷射。设计的非对称直线离子阱（ARIT）分析仪在两个X电极上添加了高度为0.5 mm的凸形和凹形圆形结构，从而使离子阱的电场中心向凹侧倾斜。凸侧的电场线被压缩到凹侧。仿真和实验结果均表明，在进行离子共振喷射时，离子更有可能从凹形侧板上的狭缝发射。仅使用一个检测器时，质谱信号强度可以达到原始直线阱的两倍以上。对阱中电场分量的计算表明，离子阱中偶数阶高场比例并未受到明显影响。结合实验测试结果，该研究进一步证实，所开发的ARIT在质量分辨率，串联质谱分析能力和定量分析能力方面没有明显损失。提出的非对称结构修改方案可以实现单面喷射，而不会显着影响分析仪的其他性能，这为后续离子阱分析仪的结构优化提供了新思路。和定量分析能力。提出的非对称结构修改方案可以实现单面喷射，而不会显着影响分析仪的其他性能，这为后续离子阱分析仪的结构优化提供了新思路。和定量分析能力。提出的非对称结构修改方案可以实现单面喷射，而不会显着影响分析仪的其他性能，这为后续离子阱分析仪的结构优化提供了新思路。