Magnetic field amplification driven by the gyro motion of charged particles
arXiv:2512.03388 · doi:10.1038/s41598-021-02944-2
Abstract
Spontaneous magnetic field generation plays important role in laser-plasma interactions. Strong quasi-static magnetic fields affect the thermal conductivity and the plasma dynamics, particularly in the case of ultra intense laser where the magnetic part of Lorentz force becomes as significant as the electric part. Kinetic simulations of giga-gauss magnetic field amplification via a laser irradiated microtube structure reveal the dynamics of charged particle implosions and the mechanism of magnetic field growth. A giga-gauss magnetic field is generated and amplified with the opposite polarity to the seed magnetic field. The spot size of the field is comparable to the laser wavelength, and the lifetime is hundreds of femtoseconds. An analytical model is presented to explain the underlying physics. This study should aid in designing future experiments.
References in corpus (16)
- The Internal-Collision-Induced Magnetic Reconnection and Turbulence (ICMART) Model of Gamma-Ray Bursts
- Simulations of small-scale turbulent dynamo
- Reconnection in a striped pulsar wind
- Modelling Gamma Ray Emission and Pair Production in High-Intensity Laser-Matter Interactions
- Imaging coronal magnetic-field reconnection in a solar flare
- A Reconnection Switch to Trigger Gamma-Ray Burst Jet Dissipation
- Laboratory evidence of dynamo amplification of magnetic fields in a turbulent plasma
- Extreme particle acceleration in magnetic reconnection layers. Application to the gamma-ray flares in the Crab Nebula
- UHECRs from magnetic reconnection in relativistic jets
- Dissipation of the striped pulsar wind
- Laboratory disruption of scaled astrophysical outflows by a misaligned magnetic field
- Inferring possible magnetic field strength of accreting inflows in EXor-type objects from scaled laboratory experiments
- Collisionless plasma interpenetration in a strong magnetic field for laboratory astrophysics experiments
- Electric Current Circuits in Astrophysics
- Sign reversal in magnetic field amplification by relativistic laser-driven microtube implosions
- Generation of megatesla magnetic fields by intense-laser-driven microtube implosions