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Computational Astrophysics Laboratory
Toshikazu EBISUZAKI
Chief Scientist
Toshikazu EBISUZAKI (Ph.D.)
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Research Areas

We promote in JEM-EUSO (Extreme Universe Space Observatory onboard Japanese Experiment Module) mission to explore the origin of extreme energy particles above 1020eV. It observes giant-air showers by extreme energy cosmic-ray from the orbit. JEM-EUSO is a super wide-field (60 degrees) telescope with a diameter of 2.5 meters planed to be installed in International Space Station. The feasibility study and conceptual design has continual for past three years under the collaboration with JAXA, RIKEN, and the JEM-EUSO international collaboration of thirteen countries (Japan, USA, Italy, France, Germany, Spain, Switzerland , Poland, Slovakia, Bulgaria, Russia, Mexico, Korea) JEM-ESO is planned to be launched around 2017 by the Japanese heavy lift rocket - the H II B, and then conveyed to ISS by HTV (H-II transfer Vehicle)
Other active studies include studies on the relation of galactic environment with the Earth's surface environment. In particular, we explore the possibility that a starburst in our Milky Way Galaxy lead the snow ball Earth events in the past. They also include development of a G-APD camera with sub-μsec sampling and its application to bio molecular science, development of ReKOS which is a friendly application software for sharing the results among researchers, and education with computers.

Research Subject

  1. Extreme Energy Cosmic-Rays
  2. Astrophysical Simulations
  3. Development of Super-High Speed Special-Purose Computers
  4. Materials Science of Earth explored by quantum simulation
  5. Development of a G-APD camera with sub-μsec sampling and its application to bio molecular science

Related links

  1. RIKEN Advanced Science Institute Website_Laboratories PageNew Window
  2. Individual Website Laboratory PageNew Window

RIKEN RESEARCH

January 14,2011
Hydrogen gas: Under pressure
Simulations have explained the peculiar nature of molecular hydrogen vibration under high pressure New Window
December 18, 2009
Supernovae host a pasta dinner
The nuclei in the core of a collapsing supernova can form a range of unusual 'pasta-like' structures New Window
October 05,2007
Just add barium
Squashed carbon balls show promising electronic properties New Window

List of Selected Publications

  1. Ishiyama, T; Makino, J; Ebisuzaki, T.:
    "Gamma-ray Signal from Earth-mass Dark Matter"
    A stropysical Journalm (Letters), 723, L195-L200, (2010).
  2. Arai, N; Yasuoka, K; Koishi, Y; and Ebisuzaki, T.:
    "Asymmetric Brownian Moter Driven by Bubble Formation in a Hydrophobic Channel"
    ACS Nano, 4(10) 5905-5913 (2010)
  3. J.Yang, J.S. Tse, T.Iitaka.:
    "First-principles study of liquid gallium at ambient and high pressure"
    J. Chem. Phys. 135, 044507 (2011)
  4. Guoying Gao, Artem R. Oganov, Aitor Bergara, Miguel Martinez-Canales, Tian Cui, Toshiaki Iitaka, Yanming Ma, and Guangtian Zou.:
    "High-pressure crystal structures and superconductivity of Stannane (SnH4)"
    PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 107 (4): 1317-1320 JAN 26 2010
  5. Y.Kawasaki et al.:
    "The focal surface of the JEM-EUSO instrument"
    Astrophys. Space Sci. Trans., 7, 167-169, 2011
  6. Matsubara, H; Ebisuzaki, T; Yasuoka, K.:
    "Microscopic insights into nucleation in a sulfuric acid-water vapor mixture based on molecular dynamics simulation"
    JOURNAL OF CHEMICAL PHYSICS, 130 (10): Art. No. 104705 MAR 14 2009
  7. Koishi, T; Yasuoka, K; Fujikawa, S; Ebisuzaki, T; Zeng, XC.:
    "Coexistence and transition between Cassie and Wenzel state on pillared hydrophobic surface"
    PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 106 (21): 8435-8440 MAY 26 2009
  8. Fujimoto, K; Sydora, RD.:
    "Particle description of the electron diffusion region in collisionless magnetic reconnection"
    PHYSICS OF PLASMAS, 16 (11): Art. No. 112309 NOV 2009
  9. Ogawa, T; Kawasaki, Y; Takizawa, Y; Ebisuzaki, T; Sakaki, N; Higuchi, M; Uchihori, Y; Kitamura, H; Wada, S.:
    "Radiation Resistance of Nd-Doped Laser Crystals for Space Application"
    JAPANESE JOURNAL OF APPLIED PHYSICS, 48 (8): Art. No. 088001 Part 1 AUG 2009
  10. Kim H, Yamamoto M, Hosaka F, Terakami S, Nishitani C, Sawamura Y, Yamane H, Wu J. Matsumoto T, Matsuyama T and Yamamoto T.:
    "Molecular characterization of novel Ty1-copia-like retrotransposons in pear (Pyrus pyrifolia)"
    Tree Genetics & Genomes 7:845-856, 2011. DOI 10.1007/s11295-011-0379-1

Members

Principal Investigator

Toshikazu EBISUZAKI
Chief Scientist

Staff Scientist

Junichiro MAKINO
Toshiaki IITAKA
Senior Research Scientist
Yoshiyuki TAKIZAWA
Senior Research Scientist
Tomoki MATSUYAMA
Senior Research Scientist

Postdoctoral Fellow

Daikou SHIOTA
Special Postdoctoral Researcher
Yoshiya KAWASAKI
Contract Researcher
Kenji SHINOZAKI
Contract Researcher
Hiroko MIYAMOTO
Contract Researcher

Student Trainee

Francesco FENU
International Program Associate

Technical Assistant

Iriko KANEKO
Technical Staff I
Katsuhiko TSUNO
Technical Staff I