Investigation on a field description of the chirped laser pulse

2016 ◽  
Vol 30 (06) ◽  
pp. 1650052 ◽  
Author(s):  
H. Y. Chen ◽  
S. J. Huang ◽  
Q. Song ◽  
P. X. Wang
Keyword(s):  
Magnetic Fields ◽  
Laser Pulse ◽  
Relative Frequency ◽  
Maxwell Equations ◽  
Laser Pulses ◽  
Relative Deviation ◽  
First Order ◽  
Electric And Magnetic Fields ◽  
Laser Simulations ◽  
Chirped Laser Pulse

Starting from a first-order approximate field description function for laser pulses, the method currently used to approximate chirped laser pulse (CLP) substitutes frequency and wave vector related variables with spatiotemporally varying functions. We investigated the error involved by calculating the relative deviation from Maxwell equations. Errors for the electric and magnetic fields are analyzed separately, and behaviors related to parameter changes (that is, in laser width, pulse duration and chirp parameter) were studied. Results show that aberration associated with currently used field-description functions for CLP increases monotonically with chirp parameter, and the deviation introduced by chirping is proportional to the relative frequency span of the laser. Simulations based on these functions will lead to considerable error, especially for laser pulses with large chirping.

Ion acceleration by multiple laser pulses and their spontaneous electromagnetic fields in plasma

2008 ◽  
Vol 74 (1) ◽  
pp. 111-118
Author(s):  
FEN-CE CHEN
Keyword(s):  
Magnetic Fields ◽  
Electric Field ◽  
Analytical Model ◽  
Electromagnetic Fields ◽  
Equations Of Motion ◽  
Charged Particles ◽  
Laser Pulses ◽  
The Self ◽  
Electric And Magnetic Fields ◽  
Relativistic Equations

AbstractThe acceleration of ions by multiple laser pulses and their spontaneously generated electric and magnetic fields is investigated by using an analytical model for the latter. The relativistic equations of motion of test charged particles are solved numerically. It is found that the self-generated axial electric field plays an important role in the acceleration, and the energy of heavy test ions can reach several gigaelectronvolts.

scholarly journals Effects of self-generated electric and magnetic fields in laser-generated fast electron propagation in solid materials: Electric inhibition and beam pinching

2001 ◽  
Vol 19 (1) ◽  
pp. 59-65 ◽  
Author(s):  
A. BERNARDINELLO ◽  
D. BATANI ◽  
A. ANTONICCI ◽  
F. PISANI ◽  
M. KOENIG ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Laser Pulses ◽  
Intense Laser ◽  
Relativistic Electrons ◽  
Speed Of Light ◽  
Solid Materials ◽  
Strong Magnetic Fields ◽  
Intense Laser Pulses ◽  
Electric And Magnetic Fields ◽  
Electron Propagation

We present some experimental results which demonstrate the presence of electric inhibition in the propagation of relativistic electrons generated by intense laser pulses, depending on target conductivity. The use of transparent targets and shadowgraphic techniques has made it possible to evidence electron jets moving at the speed of light, an indication of the presence of self-generated strong magnetic fields.

scholarly journals Field of a moving locked charge in classical electrodynamics

2020 ◽  
Vol 35 (32) ◽  
pp. 2050267
Author(s):  
Alexander J. Silenko
Keyword(s):  
Wave Function ◽  
Spatial Distribution ◽  
Magnetic Fields ◽  
Electric Field ◽  
Charge Density ◽  
Maxwell Equations ◽  
Classical Electrodynamics ◽  
Closed Space ◽  
Electric And Magnetic Fields ◽  
Average Electric Field

The paradox of a field of a moving locked charge (confined in a closed space) is considered and solved with the use of the integral Maxwell equations. While known formulas obtained for instantaneous fields of charges moving along straight and curved lines are fully correct, measurable quantities are average electric and magnetic fields of locked charges. It is shown that the average electric field of locked charges does not depend on their motion. The average electric field of protons moving in nuclei coincides with that of protons being at rest and having the same spatial distribution of the charge density. The electric field of a twisted electron is equivalent to the field of a centroid with immobile charges whose spatial distribution is defined by the wave function of the twisted electron.

scholarly journals London-Proca-Hirsch Equations for Electrodynamics of Superconductors on Cantor Sets

2015 ◽  
Vol 4 ◽  
pp. 1-7 ◽  
Author(s):  
Victor Christianto
Keyword(s):  
Magnetic Fields ◽  
Maxwell Equations ◽  
High Energy Physics ◽  
High Energy ◽  
Cantor Sets ◽  
Vector Calculus ◽  
Electric And Magnetic Fields ◽  
Proca Equations ◽  
First Time ◽  
Energy Physics

In a recent paper published at Advances in High Energy Physics (AHEP) journal, Yang Zhao et al. derived Maxwell equations on Cantor sets from the local fractional vector calculus. It can be shown that Maxwell equations on Cantor sets in a fractal bounded domain give efficiency and accuracy for describing the fractal electric and magnetic fields. However, so far there is no derivation of equations for electrodynamics of superconductor on Cantor sets. Therefore, in this paper I present for the first time a derivation of London-Proca-Hirsch equations on Cantor sets. The name of London-Proca-Hirsch is proposed because the equations were based on modifying Proca and London-Hirsch’s theory of electrodynamics of superconductor. Considering that Proca equations may be used to explain electromagnetic effects in superconductor, I suggest that the proposed London-Proca-Hirsch equations on Cantor sets can describe electromagnetic of fractal superconductors. It is hoped that this paper may stimulate further investigations and experiments in particular for fractal superconductor. It may be expected to have some impact to fractal cosmology modeling too.

Physical processes in the channel of propagation of CO2 laser pulses during the generation of electric and magnetic fields

2021 ◽  
pp. 85-91
Author(s):  
S.F. Balandin ◽  
◽  
V.A. Donchenko ◽  
V.F. Myshkin ◽  
V.A. Khan ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Co2 Laser ◽  
Laser Pulses ◽  
Physical Processes ◽  
Radiation Propagation ◽  
Electric And Magnetic Fields ◽  
Modes Of Interaction ◽  
Long Paths

The mechanisms of generation of electric and magnetic fields during the propagation of microsecond pulses of a CO2 laser in the atmosphere over long paths are considered. The range of radiated waves selected for research is substantiated. The power of the source required for the realization of the pre-breakdown and breakdown modes of interaction of radiation with the medium is estimated. The dependence of the observed signals on the conditions of radiation propagation is investigated. Comparison of theoretical estimates and results of outdoorexperiments is carried out.

scholarly journals Proton probing measurement of electric and magnetic fields generated by ns and ps laser-matter interactions

2008 ◽  
Vol 26 (2) ◽  
pp. 241-248 ◽  
Author(s):  
L. Romagnani ◽  
M. Borghesi ◽  
C.A. Cecchetti ◽  
S. Kar ◽  
P. Antici ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Electric Fields ◽  
Inertial Confinement Fusion ◽  
Laser Pulses ◽  
Inertial Confinement ◽  
Plasma Dynamics ◽  
Dense Plasmas ◽  
Electric And Magnetic Fields ◽  
Confinement Fusion ◽  
École Polytechnique

AbstractThe use of laser-accelerated protons as a particle probe for the detection of electric fields in plasmas has led in recent years to a wealth of novel information regarding the ultrafast plasma dynamics following high intensity laser-matter interactions. The high spatial quality and short duration of these beams have been essential to this purpose. We will discuss some of the most recent results obtained with this diagnostic at the Rutherford Appleton Laboratory (UK) and at LULI - Ecole Polytechnique (France), also applied to conditions of interest to conventional Inertial Confinement Fusion. In particular, the technique has been used to measure electric fields responsible for proton acceleration from solid targets irradiated with ps pulses, magnetic fields formed by ns pulse irradiation of solid targets, and electric fields associated with the ponderomotive channelling of ps laser pulses in under-dense plasmas.

scholarly journals Controlling of light with electromagnons

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
D. Szaller ◽  
A. Shuvaev ◽  
A. A. Mukhin ◽  
A. M. Kuzmenko ◽  
A. Pimenov
Keyword(s):  
Magnetic Fields ◽  
Optical Activity ◽  
Maxwell Equations ◽  
Polarization Plane ◽  
Multiferroic Materials ◽  
Transmission Coefficients ◽  
Propagation Of Light ◽  
Resonance Frequencies ◽  
Electric And Magnetic Fields ◽  
Input Radiation

Abstract Magnetoelectric coupling in multiferroic materials opens new routes to control the propagation of light. The new effects arise due to dynamic magnetoelectric susceptibility that cross-couples the electric and magnetic fields of light and modifies the solutions of Maxwell equations in media. In this paper, two major effects will be considered in detail: optical activity and asymmetric propagation. In case of optical activity the polarization plane of the input radiation rotates by an angle proportional to the magnetoelectric susceptibility. The asymmetric propagation is a counter-intuitive phenomenon and it represents different transmission coefficients for forward and backward directions. Both effects are especially strong close to resonance frequencies of electromagnons, i. e. excitations in multiferroic materials that reveal simultaneous electric and magnetic character.

scholarly journals Intra-cycle depolarization of ultraintense laser pulses focused by off-axis parabolic mirrors

2018 ◽  
Vol 6 ◽  
Author(s):  
Luca Labate ◽  
Gianluca Vantaggiato ◽  
Leonida A. Gizzi
Keyword(s):  
Electromagnetic Field ◽  
Theoretical Model ◽  
Magnetic Fields ◽  
Laser Plasma ◽  
Laser Pulses ◽  
Parabolic Mirror ◽  
Laser Plasma Interaction ◽  
Field Patterns ◽  
Electric And Magnetic Fields ◽  
Optical Cycle

A study of the structure of the electric and magnetic fields of ultraintense laser pulses focused by an off-axis parabolic mirror is reported. At first, a theoretical model is laid out, whose final equations integration allows the space and time structure of the fields to be retrieved. The model is then employed to investigate the field patterns at different times within the optical cycle, for off-axis parabola parameters normally employed in the context of ultraintense laser–plasma interaction experiments. The results show that nontrivial, complex electromagnetic field patterns are observed at the time at which the electric and magnetic fields are supposed to vanish. The importance of this effect is then studied for different laser polarizations, $f$ numbers and off-axis angles.

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