Journal Publications
- K. Shimamura, K. Matsui, J.A. Ofosu, I. Yokota, and K. Komurasaki,: Mode transition of plasma expansion for laser induced breakdown in Air, Appl. Phys. Lett., 110 (2017), 134104. http://dx.doi.org/10.1063/1.4979646
- T. Shimano, J.A. Ofosu, K. Matsui, K. Komurasaki, and H. Koizumi,: Laser-induced discharge propagation velocity in helium and argon gases, Trans. Japan Soc. Aero. Space Sci., Jan. 2017. (submitted)
- K. Matsui, T. Shimano, J.A. Ofosu, K. Komurasaki, T. Schoenherr, and H. Koizumi,: Accurate propagation velocity measurement of laser supported detonation waves, Vacuum, 136 (2017), pp. 171-176. http://dx.doi.org/10.1016/j.vacuum.2016.07.011
- K. Shimamura, J.A. Ofosu, K. Komurasaki, and H. Koizumi: Predicting propagation limits of laser-supported detonation by Hugoniot analysis, Jpn. J. Appl. Phys., 54 (2015), 016201. http://dx.doi.org/10.7567/JJAP.54.016201
- K. Shimamura, K. Komurasaki, J.A. Ofosu, and H. Koizumi,: Precursor ionization and propagation velocity of a laser-absorption wave in 1.053 and 10.6 μm wavelengths laser radiation, IEEE Trans. Plasma Sci., 42 (2014), pp. 3121-3128. http://dx.doi.org/10.1109/TPS.2014.2304960
International conference Presentations and Proceedings
- ⚪J.A. Ofosu, R. Kawashima, K. Matsui, T. Shimano, K. Komurasaki, K. Shimamura, and H. Koizumi,: Internal structure of LSD wave based on a 1-D laser-induced discharge model: comparison between numerical simulation and experiment, AVIATION 2016/ 47th AIAA Plasmadynamics & Lasers Conference, Washington, D.C., USA, June 13-17, 2016.
- R. Kawashima, J.A. Ofosu, K. Matsui, T. Shimano, K. Komurasaki, K. Shimamura, and H. Koizumi,: Numerical Investigation of LSD Wave Characteristics Using a 1-D Laser-induced Discharge Model, International High Power Laser Ablation and Directed Energy Symposia, Santa Fe, New Mexico, USA, April 4-7, 2016.
- K. Matsui, J.A. Ofosu, T. Shimano, K. Komurasaki, K. Shimamura, and H. Koizumi,: Laser Intensity and LSD Wave Propagation Velocity in a Large Diameter Beam, International High Power Laser Ablation and Directed Energy Symposia, Santa Fe, New Mexico, USA, April 4-7, 2016.
- K. Matsui, T. Shimano, J.A. Ofosu, K. Komurasaki, T. Schoenherr, and H. Koizumi,: Laser-supported detonation generated in a laser beam of 7 mm diameter, The 10th International Symposium on Applied Plasma Science, Nara, Japan, August, 2015.
- ⚪J.A. Ofosu, K. Matsui, K. Komurasaki, K. Shimamura, and H. Koizumi,: Simulation of LSD wave characteristics in Ar and N2 using a 1-D laser-induced discharge model coupled with hydrodynamic relations for laser-propelled thruster studies, 30th International Symposium on Space Technology and Science/ 34th International Electric Propulsion Conference/ 6th Nano-satellite Symposium, Hyogo-Kobe, Japan, July 4-10, 2015.
- K. Matsui, J.A. Ofosu, K. Shimamura, K. Komurasaki, and H. Koizumi,: The effect of intensity profile on LSD wave propagation velocity and its application to laser propulsion system, 30th International Symposium on Space Technology and Science/ 34th International Electric Propulsion Conference/ 6th Nano-satellite Symposium, Hyogo-Kobe, Japan, July 4-10, 2015. (Poster Presentation)
- ⚪J.A. Ofosu, K. Shimamura, K. Komurasaki, and H. Koizumi,: Structural profiling of laser-absorption layer in a laser-produced plasma of different gas media using 2-wavelength Mach-Zehnder interferometry, International High Power Laser Ablation and Beamed Energy Propulsion Symposia, Santa Fe, New Mexico, USA, April 21-25, 2014.
- K. Shimamura, ⚪J.A. Ofosu, M. Fukunari and K. Komurasaki,: One-dimensional control volume analysis and limit of laser-supported detonation for high propulsive efficiency, International High Power Laser Ablation and Beamed Energy Propulsion Symposia, Santa Fe, New Mexico, USA, April 21-25, 2014. (Poster Presentation)
- K. Shimamura, J.A. Ofosu, K. Komurasaki, H. Koizumi,: Effect of ionization waves on propagation of a laser-supported detonation wave, 45th AIAA Plasmadynamics and Lasers Conference, AIAA Aviation and Aeronautics Forum and Exposition, Atlanta, Georgia, USA, PDL-01, June 16-20, 2014.
- ⚪J.A. Ofosu,: Characterization of Laser-supported detonation density profile using two-wavelength Mach-Zehnder Interferometer, 29th International Symposium on Space Technology and Science, Nagoya, Japan, 2013-s-62-b, June 3-7, 2013.
- K. Shimamura, J.A. Ofosu, K. Komurasaki,: Influence of the self uv-radiation on the structure of the laser-supported detonation wave, 29th International Symposium on Space Technology and Science, Nagoya, Japan, 2013-b-25, June 3-7, 2013.
- K. Shimamura, J.A. Ofosu, M. Fukunari, K. Komurasaki,: A weak-overdriven detonation mode for laser-produced plasma, IEEE Pulsed Power & Plasma Science, San Francisco, California, USA, P3-39, 2013.
- K. Shimamura, J.A. Ofosu, M. Fukunari, H. Koizumi, K. Komurasaki,: Radiation structure of laser-produced plasma at low mach-number by 2-wavelength Mach-zehnder interferometer, IEEE Pulsed Power & Plasma Science, San Francisco, California, USA, P3-36, 2013.
- K. Shimamura, K. Michigami, J.A. Ofosu, and K. Komurasaki,: Influence of the gaseous form on the precursor heating layer of a laser supported detonation wave using half self-emission half shadowgraph visualization, P3-36, 54th Annual Meeting of the APS Division of Plasma Physics,, Rhode island, USA, DPP12-2012-000069, 2012.
Domestic conference Presentations and Proceedings
- 松井康平，島野徹，J.A. Ofosu，小紫公也，小泉宏之, 一次元的なレーザー支持デトネーションにおける電離波面速度とレーザー強度の関係, 航空宇宙学会第47期年会講講演会，東京, 2016年4月.
- 松井康平，J.A. Ofosu，島野徹，嶋村耕平，小紫公也，小泉宏之, 7 mmの集光系を用いたレーザー支持デトネーションの伝播特性, 第59回宇宙科学技術連合講演会，鹿児島, 2015年10月.（ポスター）
- J.A. Ofosu, ⚪松井康平，嶋村耕平，小紫公也，小泉宏之, Determination of LSD wave velocity in Ar and N2 by a laser induced discharge model with deionization process and measured parameters, 第58回宇宙科学技術連合講演会，長崎, 2014年11月.
- 松井康平， J.A. Ofosu, 小紫公也，小泉宏之, 嶋村耕平， 高エネルギーパルスレーザーの応用とLSD伝播に及ぼす影響, 第58回宇宙科学技術連合講演会，長崎, 2014年11月.
- ⚪J.A. Ofosu, K. Shimamura, K. Komurasaki, H. Koizumi,: Prediction of LSD wave velocity in Argon and Nitrogen using a 1-D radiative hydrodynamic model and measured parameters, 45th Annual General Meeting/ Lecture of the Japan Society for Aeronautical and Space Sciences, Tokyo, Japan, April 10-11, 2014.
- ⚪J.A. Ofosu, K. Shimamura, K. Komurasaki, H. Koizumi,: 2 Dimensional electron density profiling of plasma by interferometry and fringe pattern analysis, JAXA Institute of Space and Astronautical Science’ (ISAS) Space Transportation symposium, Sagamihara, Kanagawa, Japan, STEP-2013-069, January 16-17, 2014.
- ⚪J.A. Ofosu, K. Shimamura, K. Komurasaki, H. Koizumi,: Experimental investigations of laser supported detonation properties in a CO2 laser-produced plasma, 57th Japan Society for Aeronautical and Space Sciences Conference, Yonago, Tottori, Japan, 1I05, October 09-11, 2013.
- 嶋村耕平、J.A. Ofosu, 小紫公也, 自己輻射がレーザーデトネーションの伝播に与える影響 平成24年度衝撃波シンポジウム, 1A1-4, 小倉, 2013年3月（口頭発表)
- 嶋村耕平、J.A. Ofosu, 小紫公也, レーザーデトネーションの自己輻射がその伝搬に与える影響 第53回航空原動機・宇宙推進講演会, JSASS-2013-0032, 倉敷, 2013年3月（口頭発表)
- 嶋村耕平、J.A. Ofosu, 小紫公也, レーザーデトネーションにおける自己輻射と先駆電離層に関する考察, 平成２４年度宇宙輸送シンポジウム, STEP-2012-017, 相模原, 2013年1月（口頭発表)
- ⚪J.A. Ofosu, K. Shimamura, K. Komurasaki, H. Koizumi, Y. Arakawa,: Influence of gas type on internal structure of laser supported detonation using 2-wavelength Mach-Zehnder interferometer, 56th Japan Society for Aeronautical and Space Sciences Conference, Beppu, Oita, Japan, 3J19, November 20-22, 2012.
- 嶋村耕平、J.A. Ofosu, 小紫公也, レーザーデトネーションの伝播構造に関する実験的研究 日本航空宇宙学会第44期年会講演会, A13, 本郷, 2012年4月（口頭発表)