EVENT

Planned

Joining conferences


Past EVENT

Fiscal 2021


07/12/2021-13/12/2021 Experiments＠SACLA, RIKEN

Dr. Shigemori, Mr. Tanaka an Mr. Kawasaki attended the experiments at SACLA, RIKEN, The experiments went well and could get expected good data.


09/12/2021　Analysis at QST

Mr. Ota and Mr. Matsumoto went to QST, and analyzed the data, which we got by SACLA experiments at May, 2021.
The end of this project is coming and now project members are tacking to the analysis and writing articles.


22/11/2021-25/11/2021　JSPF annual meeting

The annual meeting of Japan Society of Plasma Science and Nuclear Fusion Research (JSPF) was held by on-line, because of the safety and the health of attendees.
The current situation of COVID-19 looks not so bad, so we hope it keep and stay calm during the new year holiday seasons.
    Y. Kuramitsu, T. Minami, K. Sugimoto , A. Morace, H. Ishihara, O. Kuramoto, Y. Matsumoto
    D. Tanaka, K. Shigemori, K. Kawasaki, T. Tamagawa, K. Iwasaki,


18/10/2021-12/11/2021　Experimetns @ ILE, Osaka Univ.

Project members from all over Japan gathered at the Institute of Laser Engineering, Osaka University to conduct preparatory work from one week before the experiment and the following three Gekko XII + LFEX laser experiments for three weeks.

"Magnetic reconnection with laser-driven capacitor-coil target"
                                                                        (PI：Hantao Ji - Princeton Univ., USA)
"Investigation of the structure and rate of a laser-driven magnetic reconnection"
                                                                        (PI：Taichi Morita, Kyushu Univ., Japan)
"Particle acceleration by magnetic reconnection using capacitor-coil target"
                                                                        (PI：Youichi Sakawa, Osaka Univ., Japan)

These are experiments related to "magnetic reconnection," which is one of the themes of our Core-to-Core Program.
The anti-parallel magnetic field in a plasma generated by either irradiating the capacitor-coil target or flat plate target with Gekko XII is reconnected, and magnetic reconnection occurs. At this time, the energy of the magnetic field is converted into the energy of the particles, and the particles are accelerated. The magnetic field structure is constructed with a proton back-lighter using LFEX laser or magnetic probe. Plasma parameters such as temperature, density, and flow velocity are measured by collaborative Thomson scattering, and the structure of plasma is measured by visible self-emission. The electron and ion velocity distributions are observed with Electron spectrometers and Thomson parabola.
We are looking forward to the analysis results.

Joined members (from North)
    Aoyama Gakuin Univ.: Dr. Yamazaki, Mr. Aihara, Ms. Shiota
    Toyama Univ.; Dr. Takezaki
    Osaka Univ.: Dr. Sakawa, Mr. Egashira, Mr. Maeda, Ms. Kuramoto, Mr. Matsumoto,
                        Mr. Ishihara,Dr. Fujioka, Mr. Takizawa, Mr. Maekawa, Mr. Sakai, Mr. Fukuda,
                        Mr. Nishimura
     Kyushu Univ.: Dr. Matsukiyo, Dr. Morita, Dr. Isayama, Mr. Kojima, Mr. Matsuo, Mr. Higashi,
                        Mr. Pan, Mr. Higashi


　


18/10-20/10/2021 High Pressure Conference

The 62nd High Pressure Conference of Japan was held at Himeji. The first "REAL" conference after COVID-19. The number of seat were limited but a lot of researchers got together for Poster session.


20/09-23/09/2021 JPS 2021

JPS 2021 Autumn Meeting, The Physical Society of Japan, was held by On-line.
Nowadays, most of the conferences are taken place by On-line, so some students will graduate without experience “real conference”. We hope them enjoy a feeling of tension on stage at the next JPS2022, planed at Okayama University and Okayama University of Science in March, 2022.

Presenter（From North）
    Hokkaido Univ.：TOMITA Kentaro
    Aoyama Gakuin Univ.：TANAKA Shuta
    Univ. Tokyo：JINNO Satoshi
    Kyoto Univ.：KISHIMOTO Yasuaki, MATSUI Ryutaro
    Osaka Univ.：SAKAWA Yoichi, SANO Takayoshi, KURAMITSU Yasuhiro, ABE Yuki,
                      SENTOKU Yasuhiko, IWATA Natsumi, OTA Masato,
                      SAKAI Kentaro, NISHIMOTO Takahiro
    Kyusyu Univ.：ISAYAMA Shogo, KOJIMA Takuto, MATSUO Suzuto


27/08/2021-18/09/2021　Experimetns @ ILE, Osaka Univ.

Project members from all over Japan gathered at the Institute of Laser Engineering, Osaka University and conducted the following three Gekko GXII experiments for more than three weeks, including the weekend preparation and withdrawal period.

    "Studying the Interplay Between Shocks and magnetic Fields"
                                                  (PI：Paul Mabey - LULI, France)
    "Experiments of collisionless shocks propagating into magnetized plasma"
                                                  (PI : Ryo Yamazaki - Aoyamagakuin Univ., Japan)
    "Empirical research of self-reformation of collisionless shock"
                                                  (PI : Shuichi Matsukiyo, Kyushu Univ., Japan)

These are experiments to generate a collisionless shock by applying an external magnetic field of 5-7 T with a few Torr of N2 gas.
The external magnetic field was stably applied, and good results were obtained in optical diagnostics and Thomson scattering measurements.
We will carry out analysis and try to publish within the final year of the project.

Joined members (from North)
      Hokkoido Univ.: Dr. Tomita
      Aoyama Gakuin Univ.: Dr. Yamazaki, Dr. Tanaka, Mr. Aihara, Mr. Sato,
            Ms. Shiota, Mr. Matsui, Mr. Takada
      Toyama Univ.; Dr. Takezaki, Mr. Koguchi, Mr. Kato
      Osaka Univ.: Dr. Sakawa, Dr. Sano, Dr. Kuramitsu, Mr. Minami, Mr. Sakai, Mr. Nishimoto,
            Mr. Himeno, Ms. Kuramoto, Mr. Matsumoto, Mr. Ishihara, Mr. Maeda
            Mr. Oda, Mr. Suzuki, Mr. Kagawa, Mr. Ueyama, Mr. Matsuura
      Kyushu Univ.: Dr. Matsukiyo, Dr. Morita, Dr. Isayama, Mr. Luo, Mr. Takahashi, Mr. Kojima,
            Mr. Pan, Mr. Matsuo, Mr. Higashi,　



02/08/2021-06/08/2021　 Experiments @ ILE, Osaka University

At ILE, Osaka University, preparation for experiment to be conducted from Aug. 30 to Sep. 17 with GEKKO XII, HIPER Laser was done on Aug. 2 to 8.
"After Corona", we had experienced the cancellation of the experiments and it made us disappointed. But recently, we can deal with such conditions very well by infection prevention and thanks to all the attendees cooperation, we can get good preparation.
Installation, alignment, and test operation of Thomson scattering measurement, optical measurement, and the coil system for applying an external magnetic field were carried out smoothly.

The attendees
    Dr. Takezaki, and Mr. Oguchi (Toyama Univ.)
    Dr. Tomita (Hokkaido Univ.)
    Dr. Morita, Dr. Isayama, Mr. Kojima, Mr. Pan, Mr. Higashi, and Mr. Takahashi (Kyushu Univ.)
    Mr. Aihara, Mr. Sato, and Ms. Shioda (Aoyama Gakuin Univ.)
    Dr. Sakawa, Mr. Sakai, Mr. Nishimoto, Mr. Himeno, Ms. Kuramoto Mr. Maeda (Osaka Univ.)


30/06/2021　 Analysis at QST

Students of Osaka University, Mr. Ota, Mr. Matsumoto, and Mr. Taguchi visited Dr. Fukuda at QST, KPSI. They analyzed the data taken by Solid-state nuclear track detector in the SACLA & high-intensity laser experiments conducted in May. Since the experiments were carried out as planned, we hope that the analysis will proceed smoothly and that it will lead to a good publication in the final year of the project.


14/06/2021-18/06/2021　 Experiments with SACLA and high-power ns laser

Osaka University Project members (Dr. Sakawa, Dr. Sano, Dr. Nakamura, Mr. Egashira, Mr. Ota, Mr. Matsumoto, Mr. Kamimura) attended three experiments（PIs: Michel Koenig (LULI, France), Bruno Albertazzi (LULI, France), Perez-Callejo (CEA, France)) using XFEL: SACLA and high-power ns laser at RIEN.


07/06/2021-11/06/2021　 Experiments at ILE

Dr. Takezaki (Toyama University) and Dr. Tanakan, Mr. Aihara, Ms. Shiota (Aoyamagakuin University) came to ILE, Osaka University. Together with Dr. Sakawa, Ms. Kuramoto, and Mr. Maeda (Osaka University), they conducted preparation for the Gekko XII experiments “Experiments of collisionless shocks propagating into magnetized plasma (PI: Yamazaki-Aoyamagakuin University)” and “Empirical Study of Shock Reformation using a High Power Laser (PI: Matsukiyo-Kyushu University)” scheduled in September.


18/05/2021-24/05/2021　Experiments with SACLA and high-intensity laser

Project members from Osaka University, Kyoto University, and QST attended the experiments using XFEL:SACLA and high-intensity laser (PI: Sakawa) at RIEN.


19/04/2021-21/04/2021　Attending HEDS2021/AsianCore seminar

International Conference on High Energy Density Sciences (HEDS 2021) was held online as one of the specialized conferences under the umbrella of "Optics and Photonics International Congress (OPIC2021)".
This year's HEDS 2021 was held with Conference co-chair: PI Sakawa, Steering Committee chair: Sano, Steering Committee: Fukuda, Kuramitsu, Matsukiyo, Morita, and Tanaka, with laser astrophysics as the main theme.
The conference was held only online due to COVID-19, but it was a fulfilling conference with presentations by project members and researchers in the field of high-density energy science in Japan and overseas.
At the last Asian Core session, presented by members from Japan, China, India, and Taiwan, we were able to have a meaningful discussion about the research we are conducting in the project, even though we were unable to come and go with each other in the final year of the three-year project.



Presentations by Japan members。Detailed program is "HERE"
--- Oral ---
S. Isayama, Kyushu U,
    "Controlled injection of relativistic protons in wake-field by using dual-laser pulses"
M. Iwamoto, Kyushu U,
    "Wakefield excitation and associated particle acceleration
      in relativistic collisionless shocks"
Y. Kishimoto, Kyoto U,
    "High energy density plasmas produced by the interaction
      between high intensity laser and structured medium~A new platform
      studying magnetic confined plasmas using laser~
M. Kanasaki, Kobe U,
    "Applications of solid state nuclear track detectors for measurements of
      laser-accelerated ions"
T. Asai, Kobe U,
    "A new measurement method for laser-accelerated sub-GeV protons utilizing multiple
      Coulomb scattering in an emulsion cloud chamber"
M. Murakami, Osaka U,
    "Generation of megatesla magnetic fields by microtube implosion"
T. Morita, Kyushu U,
    "Experimental investigation of magnetic reconnection
      in laser-driven self-generated magnetic field"
M. Hoshino, U Tokyo,
    "Fast particle acceleration mechanisms in astroplasma and laboratory astrophysics"
R. Yamazaki, Aoyama Gakuin U,
    "Formation of a supercritical collisionless shock
      in a magnetized uniform plasma at rest"
K. Sakai, Osaka U,
    "Collective Thomson scattering as a diagnostics for non-equilibrium plasmas"
S.J. Tanaka, Aoyama Gakuin U,
    "Experimental observation of induced Compton scattered radiation with J-KAREN-P laser"
K.F.F. Law, U Tokyo,
    "Study of particle energy energization from laser-driven magnetic reconnection experimen"
S. Tomita, Tohoku U,
    "Magnetic field amplification by turbulent dynamo in relativistic collisionless shocks"
Y. Sakawa, Osaka U,
    "Laboratory astrophysics using large-scale laser systems-Formation
      of Weibel-instability mediated collisionless shock"

--- Poster ---
T. Sano, Osaka U,
    "Plasma heating via the interaction of whistler waves"
S. Matsuo. Kyushu U.
    "Time-evolution of the magnetic field structure
      in laser-driven magnetic reconnection measured by proton radiography"
S. Matsukiyo, Kyushu U,
    "Study on magnetized collisionless shocks using PIC simulation and laser experiment"



Contact：sakawa-y(at)ile.osaka-u.ac.jp
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