1. Engineering model of the miniature ion propulsion system for the nano-satellite: HODOYOSHI-4;Koizumi;Trans. Japan Soc. Aeronaut. Sp. Sci. Aerosp. Technol. Japan.,2014
2. Development and flight operation of a miniature ion propulsion system;Koizumi;J. Propul. Power,2017
3. Initial flight operations of the miniature propulsion system installed on small space probe: PROCYON;Koizumi;Trans. Japan Soc. Aeronaut. Sp. Sci. Aerosp. Technol. Japan.,2016
4. Ion Beam Extraction and Electron Emission from the Miniature Microwave Discharge Ion Engine μ1, 31st International Electric Propulsion Conference;Koizumi,2009
5. Antenna design method and performance improvement of a micro ion engine using microwave discharge;Koizumi;Trans. Japan Soc. Aeronaut. Sp. Sci. Sp. Technol. Japan.,2009