• electric propulsion
• Iodine
• space propulsion
• design
• feeding system
• Hall effect thrusters

Hall thrusters are devices that exploit plasma phenomena to ionize a propellant and to accelerate it, generating thrust. The implementation of this technology has been made possible by the need to reduce the propellant consumption. The continuous increase in market demands for innovative and cheaper propulsion systems has led researchers to investigate new solutions, among which the adaptation of existing technologies with more efficient modifications. In this perspective, the exploitation of new propellants for space propulsion electric devices is currently under evaluation. Among all the options, iodine possesses several features that make it a promising alternative propellant. The present work aims to develop a new iodine feeding system for electric propulsion, based on previous prototypes developed at the University of Pisa. The first part describes space and electric propulsion with particular attention to Hall thrusters functions and performances. Then presents a general description of Hall thrusters propellants, introducing iodine as an alternative propellant, with advantages and disadvantages generated by its use. The second part introduces the "I2HET Technology Research Program (TRP)", showing the previous prototypes and highlighting the problems encountered during tests. From this analysis, a completely new design prototype is presented with a description of all the parts that make up the system. Then, a detailed thermal analysis helps to understand the device's feasibility, particularly to monitor achievable temperatures of the active solenoid valve to avoid malfunctions and make a correct choice of it, based on less power consumption. In the end, a brief description of the future activities that would lead to the realization and test of the new feeding system is exposed.