Testing Of The Ultraviolet Response Of Space Ow-energy Ion Detector And Design Of Electron Impaction Source

This thesis consists of two parts. In the first part a testing system on the ground is built to test the solar ultraviolet (UV) response of detector by introducing an UV lamp to simulate the solar UV, and experiments on a home-made principle prototype of space low-energy ion spectrometer are carried out by using this system. The second part presents the design of electron impact ion source of multiple reflection time of flight mass spectrometer. Thesis is mainly made up of the following three chapters:Chapter1introduces briefly space plasma and the research progress of space plasma detection, as well as a home-made principle prototype of space low-energy ion spectrometer which is designed in our laboratory.Chapter2presents a testing system on the ground which is built to test the UV response of detector. Experiments on a home-made principle prototype of space low-energy ion detector are carried out by using this system. The results show that the response of detector to the UV entering the electrostatic analyzer along the horizontal direction can be negligible and the response to the UV along a bias direction is noticeable, which is in accordance with the report in the literatures.Chapter3describes the design of multiple reflection time of flight mass spectrometer which can be applied to the detection of space neutral gas components. The optimum design and simulation of electron impact ion source, especially the storage mode and the repulsion mode, have been elaborated with the help of SIMION8.0software, and the focusing ability of electron impact ion source under repulsion mode is analyzed.