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2025.3.22
Law-san’s paper published in ApJ
Law-san’s paper “Plasma Instability Evolution and Particle Heating in the Foot Region of Perpendicular Shocks in Young Supernova Remnants” has been published in the Astrophysical Journal (ApJ).
These results reveal that the Buneman instability, followed by the ion two-stream instability, dominates the early electron-heating process in the Young Supernova Remnants condition.
2025.3.14
Farewell party for James-san
A wonderful celebration for our group! We gathered to bid farewell to James, an invaluable postdoc in our team for the past three years. At the same time, we celebrated the achievements of our students who earned their Master’s degrees this year. We wish James all the best in his future endeavors, and congratulations to our graduates for their well-deserved success!
2025.2.13
Master’s thesis presentations completed
Karaki-kun, Matsubara-kun, and Yamada-kun have completed their master’s thesis presentations successfully.
2025.1.23
Karaki-kun received the best poster presentation award from LSJ.
At the 45th Annual Meeting of the Laser Society of Japan, held in Hiroshima from January 21 to 23, 2025, Yuga Karaki, a second-year Master’s student in the Department of Physics, Graduate School of Science, was awarded the Best Poster Presentation Award for his presentation titled “Generation of High-Energy-Density Plasma via the Interaction of a Compound Parabolic Concentrator and a High-Contrast Laser.”
photo-LSJ3
2024.12.22
2024 end-year party
End-year party at BONKURA.
2024.11.23
Partipation of RPHDM2024 conference
Fujioka-san, Dun-kun, and Karaki-kun attended the 20th International Workshop on Radiative Properties of Hot Dense Matter (RPHDM2024)
, held in Sorbonne University, Paris, France, from November 18 to 22, 2024. This workshop focuses on advancing the understanding of the radiative properties of hot, dense plasmas, including opacity, emissivity, and radiative transfer in extreme environments created by high-power lasers and X-ray free-electron lasers (XFELs) etc.. Radiative properties are crucial for understanding astrophysical plasmas and diagnosing laboratory plasmas’ temperature and density. During the workshop, they engaged in fruitful discussions with scientists from France and the United States on opacity measurements of hot, dense plasmas, uncovering several promising opportunities for collaborative research. Outside of the workshop, they also enjoyed the rich culture of Paris, indulging in its cuisine, sightseeing, and shopping.
2024.11.7
OU-SJTU academic exchange ceremony
Fujioka-san and Law-san visited Shanghai Jiaotong University (SJTU) on 6th and 7th November for the annual academic exchange meeting between Osaka University and SJTU.
2024.10.26
Collaborative experiment on magnetic reconnection
A collaborative experiment on magnetic reconnection was recently conducted with Princeton Plasma Physics Laboratory and Princeton University. Magnetic reconnection, a key process in particle acceleration in cosmic and astronomical environments, such as jet formation on the sun’s surface, also has significant implications for plasma confinement in fusion devices.
In this joint research, we employed the LFEX laser to irradiate a capacitor coil target, creating an intense magnetic field. Magnetic and electric fields were meticulously measured through proton radiography, and detailed plasma diagnostics were carried out using a laser interferometer. Princeton researchers—Professor Hantao Ji, Dr. Lan Gao, as well as Yang, Randon, and Geoffrey—visited ILE to contribute to the experiments and participate in in-depth discussions. Following our experiment, we enjoyed a traditional Japanese fugu (pufferfish) meal together.
2024.10.26
Instration of deformable mirrors
We have assembled new deformable mirrors (DFMs) offline to enhance the performance of the LFEX laser system, a kJ-class multi-PW laser system at Osaka University for high-energy-density physics, including laser fusion energy. This project is being carried out in collaboration with ILE, AKA Optics, Seven-Six, and Blue Laser Fusion Inc.. The DFM’s installation on the LFEX laser system will start soon.
2024.10.7
Participated to APS-DPP2024
Fujioka-san and Takizawa-san attended the annual meeting of the Division of Plasma Physics of the American Physical Society, held in Atlanta, GA. The event provided valuable insights through engaging presentations and productive discussions. On Thursday, Fujioka-san traveled to Santa Barbara to visit Blue Laser Fusion Inc., where he and Johzaki-san had a fruitful discussion and dinner with Prof. Nakamura (CEO), Dr. Ohta, Sunahara-san, and the wonderful staff.
