Related Experiment Video
Updated: Oct 10, 2025

Magnetic Levitation Coupled with Portable Imaging and Analysis for Disease Diagnostics
Published on: February 19, 2017
Magnetic field amplification driven by the gyro motion of charged particles
Yan-Jun Gu1, Masakatsu Murakami2
1Institute of Laser Engineering, Osaka University, Suita, Osaka, 565-0871, Japan. gu-yanjun@ile.osaka-u.ac.jp.
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.
Related Concept Videos
Motion Of A Charged Particle In A Magnetic Field
Magnetic Field due to Moving Charges
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
Magnetic Fields
A magnetic field is defined by the force that a charged particle experiences...
Motional Emf
Electromagnetic Waves
Atomic Nuclei: Nuclear Magnetic Moment

