Development of a miniature gridded ion thruster
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Sähkötekniikan korkeakoulu |
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Authors
Date
2017-10-23
Department
Major/Subject
Space Science and Technology
Mcode
ELEC3039
Degree programme
Erasmus Mundus Space Master
Language
en
Pages
30
Series
Abstract
Electric propulsion has matured to the point where it starts credibly to challenge chemical propulsion systems. The high efficiency and larger specific impulse have allowed to lower the weight of the satellites and therefore costs. Even though the thrust of an electric propulsion systems is still just a fraction of that chemical rockets, the possibility of keeping it on for months eventually gives the same amount of momentum. While CubeSat projects are getting more popular by universities only a few have developed their own miniature ion thruster. These mini thrusters have a thrust force of sub mN to few mN, but they still enable up to 100 kg almost any kind of altering to satellites orbital position and attitude. Another, issue on electric propulsion is the propellant. Xenon is most used propellant fuel in ion thrusters, but because of its high costs, it is out of the reach for many universities. This study tried tackling into those two topics and create a design of a miniature ring cusp gridded ion thruster. The study wanted to research possibilities of using 3D printing technology and this way simplify the fabrication process. The goal was to create a design which could be used as a foundation for Aalto University’s propulsion development and also enable testing of alternative propellants. The propellants studied were iodine, adamantane, and diamantane. All of them are in a solid-state at room temperature, which would be practical for storage. The design is presented at the end of the study.Description
Supervisor
Praks, JaanThesis advisor
Kestilä, AnttiKeywords
Propulsion, space propulsion, ion engine, propellant