Speaker
Description
A multi-reflection time-of-flight mass analyzer is being constructed for isobaric separation and mass measurement at IMP/CAS (Institute of Modern Physics, Chinese Academy Science). A new method including two sub-procedures, global search and local refinement, has been developed for the design of MRTOF mass analyzer. The method can be used to optimize the parameters of MRTOF-MS both operating in mirror-switching mode and in-trap-lift mode. By using this method, an MRTOF mass analyzer, in which each mirror consists of five cylindrical electrodes, has been designed. In the mirror-switching mode, the maximal mass resolving power has been achieved to be 1.3 × 10$^5$ with a total time-of-flight of 6.5 ms for the ion species of $^{40}$Ar$^{1+}$ [1], and in the in-trap-lift mode, it is 1.6 × 10$^5$ with a total time-of-flight of 6.4 ms [2]. The simulation also reveals the relationships between the resolving power and the potentials applied on the mirror electrodes, the lens electrode and the drift tube.
This MRTOF-MS has been constructed and is being commissioning now. The preliminary test results show that it works [2].
In this conference, we will present the design details, optimization method and the test results obtained.
References:
[1] Y.L. Tian, Y.S. Wang, J.Y. Wang, et al., Int. J. Mass Spectrom. 408, 28–32 (2016).
[2] Jun-Ying Wang, Yu-Lin Tian, Yong-Sheng Wang, et al., Nucl. Instrum. Meth. B, (2019).
e-mail: yswang629@impcas.ac.cn
