About Me

I am currently a Ph.D candiate in Prof. Komurasaki's laboratory at the University of Tokyo. Main research works of Komurasaki Laboratory cover high energy beam propulsion, electric propulsion, wireless energy transmission, and Lunar resources utilization. My research interests are on plasma structure, electron transport and discharge oscillation in Hall thrusters which can be categorized as ExB plasma.

Contact Details

Junhwi BAK
Room502, Eng.7 Bldg., Univ. of Tokyo
7-3-1, Hongo, Bunkyo-ku
Tokyo 113-8656 JAPAN



The University of Tokyo

Ph.D. candidate in Aeronautics and Astronautics Sep. 2016 - Current

The University of Tokyo

M.Eng. in the field of Aeronautics and Astronautics Oct. 2014 - Sep. 2016

Seoul National University

B.S. in Mechanics and Aerospace Engineering Mar. 2006 - Feb. 2014


Laboratory for Plasma Nanosynthesis, PPPL, Princeton, NJ, USA

Visiting Student Research Collaborator Sep. 2016 - Oct. 2016

Laser Induced Incandescence (LII) signal modeling, and particle temperature/size simulation to characterize nano-synthesis in carbon arc discharge.


Journal Articles

in English

[4] R. Kawashima, J. Bak, S. Matsuzawa, T. Inamori, "Particle Simulation of Plasma Drag Force Generation in the Magnetic Plasma Deorbit," J. of Spacecr. Rockets, Vol. 55, No. 5, pp. 1074-1082 (2018)

[3] R. Kawashima, J. Bak, K. Komurasaki, H. Koizumi, "Two-dimensional Modeling of the Hall Thruster Discharge with Nonuniform Propellant Supply in Azimuth," Front. Appl. Plasma Technol., Vol. 11, No. 1, pp. 7-12 (2018)

[2] Y. Hamada, J. Bak, R. Kawashima, et al., "Hall Thruster Development for Japanese Space Propulsion Programs," Trans. Japan Soc. Aero. Space Sci., Vol. 60, No. 5, p. 320-326 (2017)

[1] S. Yatom, J. Bak, A. Khrabryi, and Y. Raitses, "Detection of nanoparticles in carbon arc discharge with laser-induced incandescence," Carbon, Vol. 117, pp. 154-162 (2017)

in Japanese

[3] 朴俊輝, 川嶋嶺, 水川将暢, 小紫公也, 小泉宏之, "推進剤が不一様に供給されたホールスラスタ内のプラズマ諸量," プラズマ応用科学, Vol. 25, No. 1, pp. 9-14 (2017)

[2] 濱田悠嗣, 朴俊輝, 小紫公也, 江川雄亮, 山本直嗣, 高畑侑弥, 角間徹生, 古久保裕介, 田原弘一, "5 kW級ホールスラスタ RAIJIN の性能解析", 日本航空宇宙学会論文集, Vol. 65, No.2, pp. 82-86 (2017)

[1] 水川将暢, 朴俊輝, 濱田悠嗣, 小紫公也, 川嶋嶺, 小泉宏之, "マグネティックシールディング搭載アノードレイヤ型ホールスラスタの放電室磁場形状改良によるプルーム発散抑制," プラズマ応用科学, Vol. 24-1, pp. 3-8, 2016.

International Conferences

[9] J. Bak, R. Kawashima, B. Van Loo, K. Komurasaki and H. Koizumi, “Investigation of Electron Cross-field Transport in Hall Thrusters with Inhomogeneity of Plasma Density and Potential in Azimuth”, 2nd Asia-Pacific Conference on Plasma Physics(AAPPS-DPP 2018), Kanazawa, Japan, 12th - 17th Nov. 2018

[8] S. Yatom, A. Gerakis, A. Khrabry, J. Bak, H. Belanger, M. Shneider, J. Mitrani, I. Kaganovich, A. Khodak, B. Stratton, V. Vekselman and Y. Raitses, “In Situ Approaches for Diagnostics of Nanoparticles in Plasmas”, 71st Annual Gaseous Electronics Conference, Portland, OR, USA, 5th - 9th Nov. 2018

[7] J. Bak, R. Kawashima, K. Komurasaki, H. Koizumi, “Effect of Density Inhomogeneity in Azimuth on Discharge Oscillation Suppression and Electron Diffusion in Hall Thrusters”, 54th AIAA/SAE/ASEE Joint Propulsion Conference, Cincinnati, OH, USA, 9th - 11th Jul. 2018

[6] R. Kawashima, J. Bak, K. Komurasaki, H. Koizumi and K. Hara, “Effect of Azimuthal Non-uniformity on the Hall Thruster Discharge”, 35th International Electric Propulsion Conference, Atlanta, GA, USA, 8th – 12th Oct. 2017

[5] S. Yatom, J. Bak, J.M. Mitrani, M.N. Shneider, B.C. Stratton, and Y. Raitses, “Investigation of nanoparticles formation in carbon arc with Laser Induced Incandescence (LII)”, 69th Annual Gaseous Electronics Conference, Bochum, Germany, 10th - 14th Oct. 2016

[4] J. Bak, Y. Hamada, Y. Hirano, K. Komurasaki, et al., “Operational Properties of UT-58 Anode Layer Hall Thruster with Modified Magnetic Field and Guard-ring Material”, 52nd AIAA/SAE/ASEE Joint Propulsion Conference, Salt Lake City, UT, USA, 25th - 27th Jul. 2016

[3] T. Schönherr, Y. Hirano, J. Suzuki, S. Akagi, J. Bak, et al., “Erosion Reduction Measures in Anode Layer Type Hall Thruster”, 5th Space Propulsion 2016, Rome, Italy, 2nd - 6th May 2016

[2] Y. Hamada, Y. Hirano, J. Bak, R. Kawashima, et al., “Thrust Performance Measurement of High-power RAIJIN Hall Thruster Using Improved Dual Pendulum Thrust Stand”, 8th AJCPP, Kagawa, JAPAN, 16th - 19th Mar. 2016

[1] T. Inamori, K. Iwanaga, J. Bak, P. Saisutjarit, “Interplanetary Attitude Control System Using IMF in a Small Sized Spacecraft”, 37th IEEE Aerospace Conference, Big Sky, MT, USA, 5th - 12th Mar. 2016


Nov. 2018: AAPPS-DPP Poster Prize, 2nd Asia-Pacific Conference on Plasma Physics (AAPPS-DPP 2018), AAPPS

Apr. 2018 - Mar. 2020: Research Fellowship for Young Scientists, Japan Society for the Promotion of Science, Japan

Apr. 2014 - Mar. 2018: Japanese Government (MEXT) Scholarship, Ministry of Education, Culture, Sports, Science and Technology, Japan


Anything else

Hall thrusters performance data archive “CLICK HERE for Open Google Spreadsheet”

Conference Schedule

* 2019 Sep. IEPC, Vienna, Austria

* 2019 Jul. ICPIG, Sapporo, Japan

Get In Touch.

Address and Phone

Junhwi BAK
Room502, Eng.7 Bldg., Univ. of Tokyo 7-3-1, Hongo, Bunkyo-ku Tokyo 113-8656 JAPAN
Tel : +81-3-5841-6559
E-mail : j.bak[at]al.t.u-tokyo.ac.jp