2025.4.25

Takizawa-san’s paper is published in PRR journal.

Takizawa-san’s paper has been published in Physical Review Research.

This study reports an improvement in plasma heating efficiency by relativistic electron beams (REBs) for fast ignition inertial fusion. By employing a high-contrast laser and a cone-attached target, REBs are more effectively collimated and directed into the compressed core. The high-contrast laser minimizes pre-plasma formation, enhancing beam transport. This configuration nearly doubles the plasma heating efficiency compared to conventional conditions. The results demonstrate a promising strategy to enhance energy coupling from laser to core plasma, contributing to the practical realization of fast ignition and the broader goal of achieving clean and sustainable fusion energy.

2025.4.5

Participation in the joint ISEE workshops

Law participated in the joint ISEE workshops held at Kyoto University’s Uji Campus on March 26–27, 2024.

These workshops aimed to facilitate the sharing of cutting-edge knowledge and foster collaboration between laboratory plasma physics, including laser-produced and magnetically confined plasmas, and astrophysical plasma research, such as space plasmas and high-energy cosmic rays. Discussions particularly focused on various challenges related to particle acceleration phenomena like stochastic acceleration, as well as new methods for simulating and verifying cosmic-ray acceleration mechanisms in laboratory environments.

During the workshops, Law presented numerical simulation results regarding the generation of strong magnetic fields through laser-plasma interactions. Participants engaged in productive discussions about the challenges and possibilities that arise when actual phenomena are scaled down and examined through numerical simulations.

2025.4.5

Welcome BBQ at Hattori Ryokuchi

We had a BBQ at Hattori Ryokuchi Park to welcome the new students and enjoy the cherry blossoms!

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.