Journal Paper

• Koji Kikuchi, Hiroshi Akatsuka. Definition of electron temperature of nonequilibrium plasma based on Tsallis and Rényi entropy maximization principles, Physical Review E, Americal Physical Society, Vol. 112, No. 1, 015201, July 2025.  Official location  
• Hiroshi Akatsuka, Ryo Nakanishi, Atsushi Nezu, Shinsuke Mori. Effect of nitrogen admixture to underwater argon arc discharge plasma for nuclear decommissioning, International Symposium on Zero-Carbon Energy Systems (IZES), Progress in nuclear science and technology, Atomic Energy Sosciety of Japan, Vol. 7, pp. 182-188, Mar. 2025.  Official location  

International Conference (Reviewed)

• Keren Lin, Shinji Yoshimura, Michael K. T. Mo, Wataru Kikuchi, Yuya Yamashita, Jun Enomoto, Motoshi Goto, Hiroshi Akatsuka, Takayoshi Tsutsumi. Experimental and Numerical Investigation of a Large-Diameter Helium APPJ with Floating Electrode Configuration, The International Plasma Technology Joint Conference 2025 (IPTJC2025), Proc. IPTJC2025, Program Committee of the International Plasma Technology Joint Conference 2025 (IPTJC2025), June 2025.  Official location  
• Keren Lin, Shinji Yoshimura, Motoshi Goto, Takayoshi Tsutsumi, Wataru Kikuchi, Jun Enomoto, Hiroshi Akatsuka. Development and Measurement of a Gas Temperature Controllable Atmospheric-Pressure Plasma Jet System for Plasma Bio Research, ISPlasma2025/IC-PLANTS2025, Proceedings of ISPlasma2025/IC-PLANTS2025, Organizing Committee of ISPlasma2025/IC-PLANTS2025, 05P-02, Mar. 2025.  Official location  
• Yuchen Ye, Kenta Doi, Tetsuji Kiyota, Kazuki Shimatani, Ayaki Sakurai, Wentao He, Yuya Yamashita, Wataru Kikuchi, Atsushi Nezu, Hiroshi Akatsuka. Exploring Multiple Solutions of Electron Temperature and Density in the Argon Collisional-Radiative Model Using Monte Carlo Simulations, ISPlasma2025/IC-PLANTS2025, Proceedings of ISPlasma2025/IC-PLANTS2025, Organizing Committee of ISPlasma2025/IC-PLANTS2025, 05P-24, Mar. 2025.  Official location  
• Hiroshi Akatsuka, Shota Yamada, Yuki Morita, Atsushi Nezu. Spectroscopic Study of Rotational Temperatures CO-Excited States in Microwave Discharge CO2 Plasma, International Symposium on Green Transformation Initiative and Innovative Zero-Carbon Energy Systems, GXI-ZES, GXI-ZES_Proceedings_of_Abstracts, Organizing Committee of GXI-ZES, pp. 185-186, Jan. 2025.  Official location  

Domestic Conference (Reviewed)

• Koji Kikuchi, Hiroshi Akatsuka. Redefinition of the Temperature of Nonequilibrium Excited-State Distributions Based on Non-Extensive Statistical Mechanics, The 42nd Symposium on Plasma Processing, Proceedings of 42nd Symposium on Plasma Processing, Plasma Electronics Division, Japan Society of Applied Physics, pp. 50-51, Jan. 2025.  Official location  

International Conference (Not reviewed / Unknown)

• Hiroshi Akatsuka. Optical Emission Spectroscopic Measurement of Atmospheric-Pressure Plasma by Continuum and Line Emissions with Collisional Radiative Model, 6th European Conference on Plasma Diagnostics (ECPD2025), ECPD 2025 - book of abstracts, Scientific committee of ECPD2025, p. 12, Apr. 2025.  Official location  

Domestic Conference (Not reviewed / Unknown)

• Wataru Kikuchi, Yuya Yamashita, Yuchen Ye, Jun Enomoto, Hiroshi Akatsuka. Automated line spectrum detection and integration in plasma, The 72nd JSAP Spring Meeting 2025, Exrended Abstracts of the 72nd JSAP Spring Meeting 2025, Japan Society of Applied Physics, 06-072, Mar. 2025.  Official location  
• Koji Kikuchi, Hiroshi Akatsuka. Review of Electron Temperature of Non-Equilibrium Plasma Using a Nonextensive Extension to the Gibbs Entropy, The 72nd JSAP Spring Meeting 2025, Extended Abstracts of the 72nd JSAP Spring Meeting 2025, Japan Society of Applied Physics, 06-073, Mar. 2025.  Official location  
• Koji Kikuchi, Hiroshi Akatsuka. Self-consistent Redefinition of the Excitation Temperature of Non-Equilibrium Plasma based on Nonextensive Statistical Mechanics, The 2025 Annual Meeting IEE of Japan, Proceedings of the 2025 Annual Meeting IEE of Japan, The Institute of Electrical Engineers of Japan, p. 61, Mar. 2025.  Official location  
• Ayaki Sakurai, Yuya Yamashita, Yuchen Ye, Kazuki Shimatani, Koki Fukumoto, Atsushi Nezu, Hiroshi Akatsuka. Changes in non - equilibrium properties due to argon contamination of ICP discharge nitrogen plasma, The 2025 Annual Meeting IEE of Japan, Proceedings of the 2025 Annual Meeting IEE of Japan, The Institute of Electrical Engineers of Japan, p. 62, Mar. 2025.
• Yosuke Shimada, Hiroshi Akatsuka. Examination of steady state for the excitation process of Argon plasma using a collisional-radiative model using Malliavin analysis, The Physical Society of Japan 2025 Spring Meeting, Extended abstracts of the Physical Society of Japan 2025 Spring Meeting, The Physical Society of Japan, p. 758, Mar. 2025.  Official location  
• Jun Enomoto, Wataru Kikuchi, Tomoya Taguchi, Atsushi Nezu, Hiroshi Akarsuka. Elucidation of the Nitrogen Blue Afterglow in Atmospheric Pressure Helium Plasma Jets, The 72nd JSAP Spring Meeting 2025, Extended Abstracts of the 72nd JSAP Spring Meeting 2025, Japan Society of Applied Physics, 06-098, Mar. 2025.  Official location  
• Hiroshi Akatsuka. Advances in Measurements of Electron Temperature and Density in Low-pressure Plasmas Using Optical Emission Spectroscopy and Data Science Techniques, 第257回 研究集会 ナノ・マイクロファブリケーション研究委員会, シリコンテクノロジー, 応用物理学会シリコンテクノロジー分科会, Feb. 2025.  Official location  

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