Abstract: Based on the literature and the author’s practice, the working principle and characteristics of the ionic liquid electrospray thruster (ILET) are introduced. The research status of ILET is summarized from three aspects, i.e. numerical analysis research of ILET working process, structural research, and performance and beam test. On the basis, the key technologies and difficulties involved in the development process such as numerical simulation, high precision manufacturing and assembly, micro power high voltage power supply, and thruster performance testing technology are summarized and reviewed. Finally, the relevant knowledge and suggestions are given for ILET technology and future applications.

Key words: Ionic liquid, Electrospray, Numerical simulation, Design and manufacture, Beam test