A New Approach to Increasing the Resolution of a Mass Spectrometer with Wedge-Shaped Reflectors
- 作者: Sysoeva E.1, Spakhov A.1, Sysoev A.1
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隶属关系:
- National Research Nuclear University MEPhI
- 期: 卷 72, 编号 13 (2017)
- 页面: 1350-1353
- 栏目: Articles
- URL: https://journals.rcsi.science/1061-9348/article/view/182733
- DOI: https://doi.org/10.1134/S1061934817130123
- ID: 182733
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详细
The paper describes the investigation of the ion-optical properties of a laser TOF mass spectrometer including two successively positioned wedge-shaped ion mirrors. Some specific properties of the configuration of ion trajectories near their reflection in the second ion reflector are found. The dependence of aberrations on ion energy acquired toothed shape for the resolution of the analyzer higher than 3000–5000. The approximation of the dependence gave a 15th degree polynomial. The calculation of polynomial coefficients showed a great contribution to the duration of ion packets for aberrations of higher order. The discovered features allowed us to suggest a way of the local correction of nearby trajectories in the total ion flux. By correcting the local motion of individual groups of ions, we could reduce temporary aberration to 1–1.6 ns, depending on ion energy. For the time of ion flight ~35 μs, such duration limits the resolution of the analyzer by a value not less than 10000. The real length of ion drift path was about 30 cm. The total overall sizes of the ionoptical system were ~24 × 19 × 5 cm.
作者简介
E. Sysoeva
National Research Nuclear University MEPhI
Email: sysoev@mephi.ru
俄罗斯联邦, Moscow, 115409
A. Spakhov
National Research Nuclear University MEPhI
Email: sysoev@mephi.ru
俄罗斯联邦, Moscow, 115409
Alexander Sysoev
National Research Nuclear University MEPhI
编辑信件的主要联系方式.
Email: sysoev@mephi.ru
俄罗斯联邦, Moscow, 115409