arXiv subjects

Jin-Long Jiao

Publications and source records attributed to Jin-Long Jiao.

2 recordsLinked to original sources

arXiv2025

Collisionless Shocks Mediated by Shear-Flow Magnetic Fields in Ultraintense-Laser-Produced Counter-Streaming Plasmas

The formation of ion-Weibel-mediated collisionless shocks (IW-CSs) in ultraintense-laser-produced counter-streaming plasmas is investigated using particle-in-cell simulations. Analysis of the underlying microphysics reveals that a shear-flow ion-Weibel instability generates magnetic fields, which isotropize the incoming flow and mediate shock formation. An analytical expression for the shear-flow magnetic field is derived, and a scaling law relating the magnetic field amplitude to the laser intensity is established. This mechanism reduces the shock formation time and the required laser energy by three and two orders of magnitude, respectively, compared to high-power laser experiments, making it feasible to produce IW-CSs using existing multi-kilojoule, picosecond ultraintense laser facilities.

physics.plasm-ph↗

arXiv2024

Convolutional hybrid-PIC modeling of non-neutral plasmas

Non-neutral plasmas can excite many nonlinear plasma phenomena, e.g., collisionless shocks, sheath layers, solitons, and plasma plumes. It is a fundamental issue in fields such as astrophysics, space physics, nuclear fusion, and plasma propulsion. Hybrid PIC methods are currently the most commonly used techniques for simulating non-neutral plasmas. However, the numerical methods for solving hybrid PIC model of non-neutral plasma have some shortcomings. Here, a new method called convolutional hybrid-PIC (conv-HPIC) is proposed to address this problem. This method replaces the Poisson's equation in the hybrid PIC with a convolution equation. The conv-HPIC method avoids iteration, suppresses numerical noise and exhibits high computational efficiency. It is expected to become a powerful tool for exploring nonlinear phenomena in non-neutral plasmas.

physics.plasm-ph↗