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Kenichiro Terasaka Last modified date:2020.01.30

Assistant Professor / Department of Engineering Science
Department of Advanced Energy Science and Engineering
Faculty of Engineering Sciences


Graduate School
Undergraduate School


E-Mail
Phone
092-583-7650
Fax
092-571-8894
Academic Degree
Doctor of Science
Field of Specialization
plasma science
Research
Research Interests
  • Flow structures and in non-uniform plasmas are experimentally studied.
    keyword : plasma, flow, self-organization
    2010.09~2010.09.
Academic Activities
Papers
1. Kenichiro Terasaka, S. Yoshimura, M. Y. Tanaka, Observation of high-temperature bubbles in an ECR plasma, Physics of Plasmas, 10.1063/1.5027588, 25, 5, 2018.05, Creation and annihilation of high-temperature bubbles have been observed in an electron cyclotron resonance plasma. The electron temperature in the bubble core is three times higher than that in the ambient region, and the size perpendicular to the magnetic field is much smaller than the plasma diameter. Formation of a bubble accompanies large negative spikes in the floating potential of a Langmuir probe, and the spatiotemporal behavior of the bubble has been visualized with a high-impedance wire grid detector. It is found that the bubble is in a prolate spheroidal shape with the axis along the magnetic field and occurs randomly in time and independently in space..
2. K. Terasaka, M. Y. Tanaka, S. Yoshimura, M. Aramaki, Y. Sakamoto, F. Kawazu, K. Furuta, N. Takatsuka, M. Masuda, R. Nakano, Flow structure formation in an ion-unmagnetized plasma: The HYPER-II experiments, Journal of Plasma Physics, http://dx.doi.org/10.1017/S0022377814000695, 81, 01, 345810101-345810109, 2015.01.
3. K. Terasaka, S. Yoshimura, Y. Kato, K. Furuta, M. Aramaki, T. Morisaki, M. Y. Tanaka, High-impedance wire grid method to study spatiotemporal behavior of hot electron clump generated in a plasma, Rev. Sci. Instrum., http://dx.doi.org/10.1063/1.4901096, 85, 11, 113503-1-113503-4, 2014.11.
4. S. Yoshimura, K. Terasaka, E. Tanaka, M. Aramaki, M. Y. Tanaka, Probability Density Functions of Floating Potential Fluctuations Due to Local Electron Flux Intermittency in a Linear ECR Plasma, JPS conferene proceedings, 015030, 10.7566/JPSCP.1.015030, 1, 015030_1-015030_4, 2014.04.
5. K. Terasaka, S. Yoshimura, K. Ogiwara, M. Aramaki, M.Y. Tanaka, Observation of Ion Stream Line Detachment and Onset of Azimuthal Rotation in a Diverging Magnetic Field, IEEE Trans. Plasma Sci. , 10.1109/TPS.2011.2113194, 39, 9, 1, 2011.09.
6. K. Terasaka, S. Yoshimura, T. Katahira, K. Ogiwara, M. Aramaki, and M.Y. Tanaka, Self-Calibrated Measurement of Ion Flow Using a Fine Multihole Directional Langmuir Probe, Japanese Journal of Applied Physics, 10.1143/JJAP.49.036101, 49, 036101, 2010.03.
7. K. Terasaka, S. Yoshimura, K. Ogiwara, M. Aramaki, and M.Y. Tanaka, Experimental studies on ion acceleration and stream line detachment in a diverging magnetic field, Physics of Plasmas, 10.1063/1.3457139, 17, 7, 072106, 2010.07.
Presentations
1. 寺坂健一郎, Inhomogeneous neutral gas flow field structure in a partially ionized ECR plasma, 3rd Asia-Pacific Conference on Plasma Physics, 2019.11.
2. 寺坂健一郎, Density and flow field structures of partially ionized plasma in laboratories, 2nd Asia-Pacific Conference on Plasma Physics, 2018.11.
3. 寺坂健一郎, 吉村信次, 荒巻光利, 田中雅慶, Asymmetry Velocity Distribution Function and Its Higher Order Moments in an Inhomogeneous ECR Plasma, 59th Annual Meeting of the APS Division of Plasma Physics, 2017.11.
4. 寺坂健一郎, Asymmetry of velocity distribution function associated with neutral depletion structure, 18th Laser Aided Plasma Diagnostics, 2017.09.
5. 寺坂健一郎, 古田勘士, 吉村信次, 荒巻光利, 田中雅慶, Plasma Rotation Control Experiment in a Strongly Diverging Magnetic Field, 58th Annual Meeting of the APS Division of Plasma Physics, 2016.11.
6. 寺坂健一郎, 吉村信次, 古田勘士, 山田拓也, 田中雅慶, Experimental Study on Swirl Flow in an ECR Plasma, 57th Annual Meeting of the APS Division of Plasma Physics, 2015.11, Bull. Am. Phys. Soc. 60(19), 53 (2015)..
7. 寺坂健一郎, Structure formation of plasma flow in the helicity control laboratory experiment, 5th East-Asia School and Workshop on Laboratory, Space, Astrophysical Plasmas, 2015.08.
8. 寺坂 健一郎, 川頭 史弥, 古田 勘士, 中野 陸, 吉村 信次, 田中 雅慶, Experimental Study on an Intermediate Plasma in the HYPER-II Device, 56th Annual Meeting of the APS Division of Plasma Physics, 2014.10.
9. Kenichiro Terasaka, 吉村 信次, 川頭 史弥, 荒巻 光利, Masayoshi Y Tanaka, Study on Flow Structure Formation in a Diverging Magnetic Field , International Congress on Plasma Physics, ICPP2014, 2014.09.
10. 寺坂 健一郎, 吉村 信次, 荒巻 光利, 坂本 雄樹, 田中 雅慶, Ion flow field of a rotating plasma in a diverging magnetic field, 55th American Physical Society, Division of Plasma Physics, 2013.11, Bull. Am. Phys. Soc. 58, 229(2013)..
11. 寺坂 健一郎, 吉村信次, 荒巻光利, 田中 雅慶, Experimental study on flow field of ion streamline detachment region in a diverging magnetic field, The 12th Asia Pacific Physics Conference of AAPPS, 2013.07.