首页|Proton acceleration in plasma turbulence driven by high-energy lepton jets

Proton acceleration in plasma turbulence driven by high-energy lepton jets

扫码查看
原文链接
  • 万方数据
  • 维普
The interaction of high energy lepton jets composed of electrons and positrons with background electron-proton plasma is investigated numerically based upon particle-in-cell simulation,focusing on the acceleration processes of back-ground protons due to the development of electromagnetic turbulence.Such interaction may be found in the universe when energetic lepton jets propagate in the interstellar media.When such a jet is injected into the background plasma,the Weibel instability is excited quickly,which leads to the development of plasma turbulence into the nonlinear stage.The turbulent electric and magnetic fields accelerate plasma particles via the Fermi Ⅱ type acceleration,where the maximum energy of both electrons and protons can be accelerated to much higher than that of the incident jet particles.Because of background plasma acceleration,a collisionless electrostatic shock wave is formed,where some pre-accelerated protons are further ac-celerated when passing through the shock wave front.Dependence of proton acceleration on the beam-plasma density ratio and beam energy is investigated.For a given background plasma density,the maximum proton energy generally increases both with the density and kinetic energy of the injected jet.Moreover,for a homogeneous background plasma,the proton acceleration via both turbulent fields and collisionless shocks is found to be significant.In the case of an inhomogeneous plasma,the proton acceleration in the plasma turbulence is dominant.Our studies illustrate a scenario where protons from background plasma can be accelerated successively by the turbulent fields and collisionless shocks.

Weibel instabilityturbulencecollisionless shockion acceleration

张高维、盛政明、翁苏明、陈民、张杰

展开 >

Key Laboratory for Laser Plasmas(MOE),School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China

Collaborative Innovation Center of IFSA,Shanghai Jiao Tong University,Shanghai 200240,China

Tsung-Dao Lee Institute,Shanghai Jiao Tong University,Shanghai 201210,China

2024

10.1088/1674-1056/ad7b01

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(11)