Ion Unidirectional Ejection Simulation Study of An Extremely Miniature Hyperbolic Linear Ion Trap
10.19756/j.issn.0253-3820.251093
- VernacularTitle:极微型双曲面线性离子阱的单向离子出射模拟研究
- Author:
Yun-Fan HE
1
;
Zhuo-Qing YANG
;
Yan WANG
;
Jiu-Wen SUN
;
Yun-Na SUN
;
Lu-Yue ZHU
;
Di ZHANG
;
Feng-Dan WANG
;
Min LIU
;
Gui-Fu DING
;
Jin-Yuan YAO
Author Information
1. 上海交通大学集成电路学院,上海 200240;上海市非硅微纳集成制造专业技术服务平台,上海 200240
- Keywords:
Extremely miniature hyperbolic linear ion trap;
Electric field compensation method;
Structural optimization;
Unidirectional ejection efficiency;
Mass resolution
- From:
Chinese Journal of Analytical Chemistry
2025;53(6):885-893
- CountryChina
- Language:Chinese
-
Abstract:
With the increasing demand for dynamic,real-time and rapid qualitative analysis of chemical composition in areas such as emergency response and space exploration,chip-scale mass spectrometers have attracted significant attention.These devices are expected to drive the integration of mass spectrometry with micro/nano-fabrication and intelligent sensing technologies,fostering profound innovation and breakthroughs in analytical chemistry.As an excellent mass analyzer,the ion trap exhibits numerous advantages,and its miniaturization creates favorable conditions for the high-density integration of miniature mass spectrometers.However,the reduction in ion storage capacity may compromise its sensitivity and dynamic range,rendering the study of ion unidirectional ejection in highly miniaturized ion traps of significant practical importance.In this work,a research was conducted on achieving efficient ion unidirectional ejection while maintaining high mass resolution in the extremely miniature hyperbolic linear ion trap(M-HLIT)with a field radius of 1 mm,and an electric field compensation method was proposed,which combined asymmetric electrode stretching and unbalanced RF voltage to achieve high-precision optimization of the electric field composition.Simulations showed that in an ideal structure,this method achieved 100％unidirectional ejection efficiency with the mass resolution of 518,significantly outperforming traditional asymmetric structure method(365)and unbalanced voltage method(321).Following the introduction of ion ejection slots,further optimization through bidirectional stretching and electrical parameters improved the resolution to 790 while maintaining a unidirectional ejection efficiency of 93％.This method eliminated the requirement for additional excitation voltage,offering an ideal solution for the miniature mass analyzer with high detection performance of chip-level mass spectrometers.
