Abstract: Designation of Pulsed Ion TrapHang Wei; Yang Pengyuan; wang Xilaoru; Huang Benli(Department of Chemistry, Xiamen University, Xiamen 361005, china)Abstract: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.Keywords: ion trap, ion starage stage, ion extraction stage, energy filter, ion trajectory.