PreprintCC BY 4.0arXiv
Collisionless Shock Driven by a Supersonic Velocity Shear
Abstract
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 simulation. The Alves instability converts the shear kinetic energy into thermal and magnetic field energy. The resulting pressures push the plasma, leading to the formation of collisionless shocks. The generated collisionless shocks would accelerate high energy particles, which is a possible solution to the injection problem of shear acceleration. In addition, the collisionless shocks generate a magnetic field turbulence that is required for the shear acceleration to work.
Versions
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BibTeX
@misc{kamiido2026collisionless,
title = {{Collisionless Shock Driven by a Supersonic Velocity Shear}},
author = {Kazuki Kamiido and Yutaka Ohira},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2608.16656},
eprint = {2608.16656},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.16656},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Collisionless Shock Driven by a Supersonic Velocity Shear
AU - Kazuki Kamiido
AU - Yutaka Ohira
PY - 2026
DA - 2026/10/08
PB - arXiv
DO - 10.48550/arxiv.2608.16656
UR - https://arxiv.org/abs/2608.16656
AB - 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 simulation. The Alves instability converts the shear kinetic energy into thermal and magnetic field energy. The resulting pressures push the plasma, leading to the formation of collisionless shocks. The generated collisionless shocks would accelerate high energy particles, which is a possible solution to the injection problem of shear acceleration. In addition, the collisionless shocks generate a magnetic field turbulence that is required for the shear acceleration to work.
ER -