10 citations · 23 across the 9 of their papers we have counts for
9 papers
Collisionless Shock Driven by a Supersonic Velocity Shear
Kazuki Kamiido, Yutaka Ohira
The long-term evolution of a relativistic collisionless velocity shear in an unmagnetized electron-positron plasma is investigated using a first-principle particle-in-cell simulati…
Property of downstream turbulence driven by the special relativistic shock-clump interaction
Kanji Morikawa, Yutaka Ohira, Takumi Ohmura
Three-dimensional special relativistic magnetohydrodynamic simulations are performed to investigate properties of the downstream turbulence generated by the interaction between a r…
Collisionless shocks having relativistic velocities in relativistically hot plasmas
Kamiido Kazuki, Ohira Yutaka
Shocks in relativistically hot plasmas are thought to exist in various high-energy astrophysical phenomena, but it is not clear how relativistic collisionless shocks are formed, wh…
Very-high-energy gamma rays from cosmic rays escaping from Galactic black hole binaries
Yutaka Ohira
We solve the cosmic-ray diffusion around a Galactic black hole binary (microquasars) by considering the finite size of the escape region and the continuous cosmic-ray injection. We…
Laser-Driven Proton-Only Acceleration in a Multicomponent Near-Critical-Density Plasma
Y. Sakawa, H. Ishihara, S. N. Ryazantsev +26
An experimental investigation of collisionless shock ion acceleration is presented using a multicomponent plasma and a high-intensity picosecond duration laser pulse. Protons are t…
Collisionless shock in a relativistically hot unmagnetized electron-positron plasma
Kamiido Kazuki, Ohira Yutaka
In this work, we investigate collisionless shocks propagating in a relativistically hot unmagnetized electron-positron plasmas. We estimate the dissipation fraction at shocks in th…
Particle acceleration and magnetic field amplification by relativistic shocks in inhomogeneous media
Kanji Morikawa, Yutaka Ohira, Takumi Ohmura
Particle acceleration and magnetic field amplification in relativistic shocks propagating in inhomogeneous media are investigated by three-dimensional magnetohydrodynamical (MHD) s…
Evolution of secondary electron spectrum during cosmic-ray discharge in the universe
Yutaka Ohira
We recently found that streaming cosmic rays (CRs) induce a resistive electric field that can accelerate secondary electrons produced by CR ionization. In this work, we study the e…
Anomalous plasma acceleration in colliding high-power laser-produced plasmas
T. Morita, K. Nagashima, M. Edamoto +20
We developed an experimental platform for studying magnetic reconnection in an external magnetic field with simultaneous measurements of plasma imaging, flow velocity, and magnetic…