All Stories

  1. Numerical Study of Facility Pressure Effects on Micronozzles for Space Propulsion

    Article • AIAA Journal, November 2024, American Institute of Aeronautics and Astronautics (AIAA)

    Keita Nishii

  2. Modeling of Ion Thruster Plume Neutralization Using Kinetic Simulations

    Article • January 2024, American Institute of Aeronautics and Astronautics (AIAA)

    Keita Nishii

  3. Three-Dimensional Kinetic Simulations of Carbon Backsputtering in Vacuum Chambers from Ion Thruster Plumes

    Article • Journal of Propulsion and Power, October 2023, American Institute of Aeronautics and Astronautics (AIAA)

    Keita Nishii

  4. Numerical Investigation of Carbon Sputtering and Transport for the Ion Thruster Testing in the Ground Facility

    Article • January 2023, American Institute of Aeronautics and Astronautics (AIAA)

    Keita Nishii

  5. Background Pressure Effect on Thrust Efficiency of Low-Reynolds-Number Nozzles

    Article • Journal of Propulsion and Power, November 2022, American Institute of Aeronautics and Astronautics (AIAA)

    Keita Nishii

  6. Carbon Sputtering and Transportation in a Ground Facility during Electric Propulsion Testing

    Article • June 2022, American Institute of Aeronautics and Astronautics (AIAA)

    Keita Nishii, HUY TRAN

  7. Combustion of Magnesium Wires with Oxygen and Water Vapor

    Article • Combustion Science and Technology, December 2021, Taylor & Francis

    Keita Nishii

  8. Low-pressure-vaporization of water droplets on wall under normal and microgravity conditions

    Article • Acta Astronautica, September 2021, Elsevier

    Keita Nishii

  9. Experimental Characterization of Nozzle Performance at Low Reynolds Numbers for Water Microthrusters

    Article • Journal of Propulsion and Power, July 2021, American Institute of Aeronautics and Astronautics (AIAA)

    Keita Nishii

  10. The Measurement of 2-D Density Distribution at the Downstream of a Micronozzle of a Spacecraft Using Electron Beam Induced Fluorescence

    Article • JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, January 2021, Japan Society for Aeronautical and Space Sciences

    Keita Nishii

  11. Feasibility Study of a Hybrid Thruster using Wire-Shaped Magnesium and Water for Application to Small Spacecraft

    Article • TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, January 2021, Japan Society for Aeronautical and Space Sciences

    Keita Nishii

  12. Power Management of Lunar CubeSat Mission EQUULEUS Under Uncertainties of Power Generation and Consumption

    Article • TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES AEROSPACE TECHNOLOGY JAPAN, January 2021, Japan Society for Aeronautical and Space Sciences

    Keita Nishii

  13. Experimental Study on Bulk Metal-Water Combustion for Small Spacecraft Propulsion

    Article • August 2020, American Institute of Aeronautics and Astronautics (AIAA)

    Prof. Kimiya Komurasaki, Keita Nishii

  14. Direct measurement of 1-mN-class thrust and 100-s-class specific impulse for a CubeSat propulsion system

    Article • Review of Scientific Instruments, March 2020, American Institute of Physics

    Jun Asakawa, Keita Nishii

  15. Mission to Earth–Moon Lagrange Point by a 6U CubeSat: EQUULEUS

    Article • IEEE Aerospace and Electronic Systems Magazine, March 2020, Institute of Electrical & Electronics Engineers (IEEE)

    Keita Nishii

  16. Flight Model Development and Ground Demonstration of Water Resistojet Propulsion System for CubeSats

    Article • TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, January 2020, Japan Society for Aeronautical and Space Sciences

    Keita Nishii

  17. Assessment of Micropropulsion System Unifying Water Ion Thrusters and Water Resistojet Thrusters

    Article • Journal of Spacecraft and Rockets, September 2019, American Institute of Aeronautics and Astronautics (AIAA)

    Yoshinori Takao, Jun Asakawa, Keita Nishii

  18. Experimental Characterization of Nozzle Performance at Low Reynolds Numbers for Water Resistojet Thrusters

    Article • August 2019, American Institute of Aeronautics and Astronautics (AIAA)

    Prof. Kimiya Komurasaki, Keita Nishii

  19. Comparison of Performance by different operation method of a Water Resistojet Propulsion System : AQUARIUS Installed on 6U CubeSat : EQUULEUS.

    Article • August 2019, American Institute of Aeronautics and Astronautics (AIAA)

    Prof. Kimiya Komurasaki, Jun Asakawa, Keita Nishii

  20. Experimental Effects of Ambient Pressure on Nozzle Efficiency at Low Reynolds Numbers

    Article • JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, January 2018, Japan Society for Aeronautical and Space Sciences

    Keita Nishii

  21. Fundamental Ground Experiment of a Water Resistojet Propulsion System: AQUARIUS Installed on a 6U CubeSat: EQUULEUS

    Article • TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES AEROSPACE TECHNOLOGY JAPAN, January 2018, Japan Society for Aeronautical and Space Sciences

    Keita Nishii