scholarly journals Magnetic field amplification driven by the gyro motion of charged particles

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yan-Jun Gu ◽  
Masakatsu Murakami
Keyword(s):  
Magnetic Field ◽  
Spot Size ◽  
Opposite Polarity ◽  
Laser Wavelength ◽  
Intense Laser ◽  
Magnetic Field Generation ◽  
Plasma Dynamics ◽  
Static Magnetic Fields ◽  
Laser Plasma Interactions ◽  
Field Amplification

AbstractSpontaneous 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.

scholarly journals Magnetic Field Amplification Driven by the Gyro Motion of Charged Particles

2021 ◽  
Author(s):  
Yan-Jun Gu ◽  
Masakatsu Murakami
Keyword(s):  
Magnetic Field ◽  
Spot Size ◽  
Opposite Polarity ◽  
Laser Wavelength ◽  
Intense Laser ◽  
Magnetic Field Generation ◽  
Plasma Dynamics ◽  
Static Magnetic Fields ◽  
Laser Plasma Interactions ◽  
Field Amplification

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.

Effect of obliquely external magnetic field on the intense laser pulse propagating in plasma medium

2020 ◽  
Vol 34 (07) ◽  
pp. 2050044
Author(s):  
Mehdi Abedi-Varaki
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Laser Pulse ◽  
Magnetoactive Plasma ◽  
Spot Size ◽  
The Self ◽  
Intense Laser ◽  
Intense Laser Pulse ◽  
Laser Spot Size ◽  
Self Focusing

In this paper, self-focusing of intense laser pulse propagating along the obliquely external magnetic field on the collisional magnetoactive plasma by using the perturbation theory have been studied. The wave equation describing the interaction of intense laser pulse with collisional magnetoactive plasma is derived. In addition, employing source-dependent expansion (SDE) method, the analysis of the laser spot-size is discussed. It is shown that with increasing of the angle in obliquely external magnetic field, the spot-size of laser pulse decreases and as a result laser pulse becomes more focused. Furthermore, it is concluded that the self-focusing quality of the laser pulse has been enhanced due to the presence of obliquely external magnetic field in the collisional magnetoactive plasma. Besides, it is seen that with increasing of [Formula: see text], the laser spot-size reduces and subsequently the self-focusing of the laser pulse in plasma enhances. Moreover, it is found that changing the collision effect in the magnetoactive plasma leads to increases of self-focusing properties.

scholarly journals Magnetic field generation during intense laser channelling in underdense plasma

2016 ◽  
Vol 23 (6) ◽  
pp. 063121 ◽  
Author(s):  
A. G. Smyth ◽  
G. Sarri ◽  
M. Vranic ◽  
Y. Amano ◽  
D. Doria ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Intense Laser ◽  
Magnetic Field Generation ◽  
Field Generation ◽  
Underdense Plasma

scholarly journals Plasma jet formation and magnetic-field generation in the intense laser plasma under oblique incidence

1999 ◽  
Vol 6 (7) ◽  
pp. 2855-2861 ◽  
Author(s):  
Y. Sentoku ◽  
H. Ruhl ◽  
K. Mima ◽  
R. Kodama ◽  
K. A. Tanaka ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Laser Plasma ◽  
Oblique Incidence ◽  
Plasma Jet ◽  
Intense Laser ◽  
Magnetic Field Generation ◽  
Jet Formation ◽  
Field Generation

scholarly journals Effects of the electron spin on the nonlinear generation of quasi-static magnetic fields in a plasma

2010 ◽  
Vol 76 (6) ◽  
pp. 865-873 ◽  
Author(s):  
M. STEFAN ◽  
G. BRODIN ◽  
F. HAAS ◽  
M. MARKLUND
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Electron Spin ◽  
High Frequency ◽  
Significant Contribution ◽  
Magnetic Field Generation ◽  
Temperature Plasma ◽  
Static Magnetic Fields ◽  
Nonlinear Generation ◽  
The Magnetic Field

AbstractThrough an extended kinetic model, we study the nonlinear generation of quasi-static magnetic fields by high-frequency fields in a plasma, taking into account the effects of the electron spin. It is found that although the largest part of the nonlinear current in a moderate density, moderate temperature plasma is due to the classical terms, the spin may still give a significant contribution to the magnetic field generation mechanism. Applications of our results are discussed.

scholarly journals Some Peculiaritiers of the Relativistic Electron-Positron Plasma Dynamics in the Pulsar Magnetosphere

2000 ◽  
Vol 177 ◽  
pp. 465-468
Author(s):  
Irakli S. Nanobashvili
Keyword(s):  
Magnetic Field ◽  
Relativistic Electron ◽  
Centrifugal Force ◽  
Plasma Particle ◽  
Pulsar Magnetosphere ◽  
Magnetic Field Generation ◽  
Plasma Dynamics ◽  
Electron Positron ◽  
Instability Development ◽  
Aperiodic Instability

AbstractSome aspects of relativistic electron-positron plasma dynamics in the pulsar magnetosphere are discussed. Namely it is shown that if we take into account the influence of centrifugal force, this gives rise to the new dynamical effect of plasma particle radial braking in the pulsar magnetosphere. Also the possibility of aperiodic instability development in the pulsar magnetosphere is demonstrated. The mechanism for the toroidal magnetic field generation is proposed. Besides, the possible changes of the pulsar magnetosphere structure caused by above mentioned processes is considered.

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