Electron collision ion source based on electron beam three-dimensional potential well storage

• Main Authors: QU SANBIAO, CHEN XIANGJUN, SHAN XU
• Format: Patent
• Language: Chinese; English
• Published: 18.11.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRICITY

The invention relates to an electron collision ion source based on electron beam three-dimensional potential well storage, and belongs to the technical field of mass spectrometers. Comprising an electron gun and an ionization chamber. The electron gun comprises a delay electrode, an annular filament electrode, a grid electrode, a modulation electrode and an anode; the ionization chamber is a space area defined by central grooves of the first anode and the second anode. According to the electron collision storage ion source, a narrow and deep three-dimensional potential well is prepared by utilizing the space charge effect of a toroidal electron beam for the first time, and high-efficiency long-time storage of ions is realized. The storage-free ion source has the characteristics of high storage efficiency, long time, small non-point source effect and the like, the sensitivity of the storage-free ion source is improved by 2-3 orders of magnitude compared with the limit sensitivity of a traditional storage-free