Abstract
The Project of Osaka Institute of Technology Electric-Rocket-Engine onboard Small Space Ship (PROITERES) was started at Osaka Institute of Technology in 2007. After successfully launching the 1st PROITERES nano-satellite, the 2nd PROITERES nano-satellite with electrothermal Pulsed Plasma Thrusters (PPTs) has been developed since 2010. The main mission is powered flight with very long distance, i.e. changing more than 10km in altitude on near-earth orbits by high-power PPTs. In this research, a 30W-class PPT system was developed. The PPT achieved the maximum impulse bit of 2.47mNs, specific impulse of 342s and total impulse of 90.1Ns with repetitive 72,000 shots. Repetitive 100,000 shots could be also carried out using a newly developed Power Processing Unit (PPU). Furthermore, a long-time operation system with a Multi-Discharge-Room type PPT (MDR-PPT) head was developed. In the present paper, we explain development status of EM-PPT system including MDR-PPT, PPU, and capacitor.
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