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Citation: YAO Ru-Jiao, HE Yang, XIAO Yu, DING Zheng-Zhi, YUAN Guang-Zhou, ZHANG Zai-Yue, QIAN Jie, ZHANG Shu-Guang, LI Xiao-Xu. Optimization of Linear Ion Trap Mass Analyzer with Triangular Electrodes by Simulation[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(11): 1793-1797. doi: 10.11895/j.issn.0253-3820.150978 shu

Optimization of Linear Ion Trap Mass Analyzer with Triangular Electrodes by Simulation

1.
School of Mechanical and Electrical Engineering, Soochow University, Suzhou 215021, China;
2.
Institute of Spacecraft Equipment, Shanghai 200240, China

Received Date: 11 December 2015
Revised Date: 20 May 2016

Fund Project: This work was supported by the Natural Science Foundation of Jiangsu Province, China (No. BK20140340) and youth Natural Science Foundation of Soochow Univesity (No. SDY2013A11).

As a novel linear ion trap, the triangular-electrode linear ion trap (TeLIT) has simple structure and good performance. The relationship between its geometry and performance was investigated. Ion trajectories and mass peaks of TeLIT with different ratios of field radius (r_x/r_y) were analyzed by using simulation software SIMION and AXSIM. It was shown that the performance of the TeLIT could be enhanced by optimizing r_x/r_y which would improve internal electric fields distribution. The optimum mass resolution of 8387 was achieved for ions with m/z 1892 Th at r_x/r_y=5.75/5 when scan rate was 1500 Th/s. When the scan rate was decreased to about 300 Th/s, the resolving power of the mass spectrum was in excess of 23000.
- Triangular-electrode linear ion trap,
- Simulation,
- Mass resolution,
- Electric field optimization
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