専門・基盤技術グループ

Takato Morishita

  (森下 貴都)

Profile Information

Affiliation
Researcher, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
Degree
Ph.D. in Engineering(Mar, 2022, The University of Tokyo)

Researcher number
30968475
ORCID ID
 https://orcid.org/0000-0002-4271-9254
J-GLOBAL ID
202201009111687275
researchmap Member ID
R000042757

Papers

 11
  • Takato Morishita, Ryudo Tsukizaki, Kazutaka Nishiyama
    AIP Advances, Jun 1, 2024  Peer-reviewedLead authorCorresponding author
  • Soichiro Tsuji, Takato Morishita, Ayumu Nono, Ryudo Tsukizaki, Kazutaka Nishiyama
    Acta Astronautica, May, 2024  Peer-reviewed
  • Ayumu Nono, Takato Morishita, Satoshi Hosoda, Ryudo Tsukizaki, Kazutaka Nishiyama
    Acta Astronautica, 212 130-138, Nov, 2023  Peer-reviewed
  • Takato Morishita, Ryudo Tsukizaki, Kazutaka Nishiyama, Hitoshi Kuninaka
    Journal of Applied Physics, 131(1) 013301-013301, Jan 7, 2022  Peer-reviewedInvitedLead authorCorresponding author
    An understanding of the plasma physics inside a microwave discharge cathode is key to extending the lifetime of microwave ion thruster systems. However, probes can only measure the plume region due to their low spatial resolution and electromagnetic disturbance. In this study, we develop a microwave discharge-based cathode with a small optical window in the discharge chamber that provides visual access to the cathode interior. The cathode has the same anode currents as those of a flight model in the diode mode (anode voltage error is within 7%). Laser-induced fluorescence spectroscopy is applied to the cathode. The axial and radial ion velocity distribution functions (IVDFs) in the plume region and the axial IVDFs inside the cathode are measured. The measured functions, which represent the number density of Xe II (P-3(2))6p[3](5/2), are compared to a previously reported number density of Xe II measured by an electrostatic probe in the plume region. The functions exhibit multimodal characteristics. Theoretical models based on the measured current oscillation support these characteristics.
  • Masatoshi CHONO, Naoji YAMAMOTO, Ryudo TSUKIZAKI, Takato MORISHITA, Kenichi KUBOTA, Shinatra CHO, Kiyoshi KINEFUCHI, Toru TAKAHASHI
    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, 64(3) 189-192, 2021  Peer-reviewed

Misc.

 22

Books and Other Publications

 2

Presentations

 34

Professional Memberships

 2

Research Projects

 3

Social Activities

 3

Media Coverage

 5