脉冲离子阱的设计

Designation of Pulsed Ion Trap

本文提出了一种适用于飞行时间质谱仪的新颖离子阱。它可在脉冲状态下工作，并可存储极宽质量范围的离子。离子的存储量与离子阱中心所加的负电位理论上成正比，并可选择被存储离子的能量范围，可做为能量过滤器，减小离子的能量分散对分辨本领的影响；特别是该离子阱具有独立于离子源而引入离子的特点，扩大了应用范围。与通常所用的三维四极离子阱相比，其机械加工和配套电子线路都比较简单，可在一般的实验室内制做。

A novel ion trap has ben design to be used in time--of--flight mass spectrometer.This ion trap works in pulsed mode and can store ions of wide mass range. Its ion accumulation is proportional to the potential at the center of the trap. The iontrap can storethe ions with selectable kinetic energy range and act as an energy filter to improve massresolving power. The ion trap can draw ions into its cavity and works independent of theion source which will enlarge its applicatios. Comparde with the general three dimensional quadrupole ion trap, it is simple in both mechanic construction and electronic circuitry, and easy to be made in normal laboratories.