The effect of static external magnetic field on the nonlinear absorption of the S-polarised short laser pulse in collisional underdense plasma

Pramana ◽  
2018 ◽  
Vol 91 (6) ◽  
Author(s):  
Mehdi Ettehadi-Abari ◽  
Mohammad-Taghi Hosseinnejad
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Laser Pulse ◽  
Nonlinear Absorption ◽  
Short Laser Pulse ◽  
Underdense Plasma

Quasistatic magnetic field generated by a short laser pulse in an underdense plasma

1997 ◽  
Vol 4 (12) ◽  
pp. 4358-4368 ◽  
Author(s):  
Leonid M. Gorbunov ◽  
Patrick Mora ◽  
Thomas M. Antonsen
Keyword(s):  
Magnetic Field ◽  
Laser Pulse ◽  
Short Laser Pulse ◽  
Underdense Plasma

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 Analytical description of rippling effect and ion acceleration in plasma produced by a short laser pulse

2006 ◽  
Vol 24 (1) ◽  
pp. 15-25 ◽  
Author(s):  
S. GLOWACZ ◽  
H. HORA ◽  
J. BADZIAK ◽  
S. JABLONSKI ◽  
YU CANG ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Laser Pulse ◽  
Analytical Description ◽  
Skin Layer ◽  
Short Laser Pulse ◽  
Ion Density ◽  
Frequency Components ◽  
Acceleration Method ◽  
Fast Ion ◽  
Underdense Plasma

In this paper we present the analytical description of two processes dealing with the skin-layer ponderomotive acceleration method of fast ion generation by a short laser pulse: ion density rippling in the underdense plasma region and generation of ion beams by trapped electromagnetic field in plasma. Some numerical examples of hydrodynamic simulation illustrating these processes are shown. The effect of using the laser pulse consisting of different frequency components on the ion density rippling and on phenomena connected with trapped electromagnetic field is analyzed.

scholarly journals Improvement of ion acceleration in radiation pressure acceleration regime by using an external strong magnetic field

2019 ◽  
Vol 37 (2) ◽  
pp. 217-222 ◽  
Author(s):  
H. Cheng ◽  
L. H. Cao ◽  
J. X. Gong ◽  
R. Xie ◽  
C. Y. Zheng ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Laser Pulse ◽  
Radiation Pressure ◽  
Longitudinal Magnetic Field ◽  
Ponderomotive Force ◽  
Two Dimensional ◽  
Particle In Cell ◽  
Combined Action ◽  
The Magnetic Field

AbstractTwo-dimensional particle-in-cell (PIC) simulations have been used to investigate the interaction between a laser pulse and a foil exposed to an external strong longitudinal magnetic field. Compared with that in the absence of the external magnetic field, the divergence of proton with the magnetic field in radiation pressure acceleration (RPA) regimes has improved remarkably due to the restriction of the electron transverse expansion. During the RPA process, the foil develops into a typical bubble-like shape resulting from the combined action of transversal ponderomotive force and instabilities. However, the foil prefers to be in a cone-like shape by using the magnetic field. The dependence of proton divergence on the strength of magnetic field has been studied, and an optimal magnetic field of nearly 60 kT is achieved in these simulations.

scholarly journals “Single-cycle” ionization effects in laser–matter interaction

2000 ◽  
Vol 18 (3) ◽  
pp. 411-416
Author(s):  
ENRIQUE CONEJERO JARQUE ◽  
FULVIO CORNOLTI ◽  
ANDREA MACCHI ◽  
HARTMUT RUHL
Keyword(s):  
Magnetic Field ◽  
Laser Pulse ◽  
Dense Matter ◽  
Short Laser Pulse ◽  
Single Cycle ◽  
Ionization Fronts ◽  
Matter Interaction ◽  
Steady Magnetic Field

We investigate numerical effects related to “single-cycle” ionization of dense matter by an ultra-short laser pulse. The strongly nonadiabatic response of electrons leads to generation of a MG steady magnetic field in laser–solid interaction. By using two-beam interference, it is possible to create periodic density structures able to trap light and to generate relativistic ionization fronts.

scholarly journals Nonlinear backward Raman scattering in the short laser pulse interaction with a cold underdense transversely magnetized plasma

2011 ◽  
Vol 29 (3) ◽  
pp. 373-380 ◽  
Author(s):  
Alireza Paknezhad ◽  
Davoud Dorranian
Keyword(s):  
Magnetic Field ◽  
Growth Rate ◽  
Laser Pulse ◽  
Raman Scattering ◽  
Initial Conditions ◽  
Nonlinear Effects ◽  
Magnetized Plasma ◽  
Short Laser Pulse ◽  
Linearly Polarized ◽  
Set Up

AbstractRaman backward scattering is investigated in the interaction of linearly polarized ultra short laser pulse with a homogenous cold underdense magnetized plasma by taking into account the relativistic effect and the effect of nonlinearity up to third order. The plasma is embedded in a uniform magnetic field perpendicular to both of propagation direction and electric vector of the radiation field. Nonlinear wave equation is set up and differential equations, which model the instability, are derived. Using of the Fourier transformation, analytical solutions are obtained for a set of physically relevant initial conditions and the temporal growth rate of instability is calculated. Results are significantly different in comparison with lower order computations. The growth rate of backward Raman scattering shows an increase due to the presence of external magnetic field as well as nonlinear effects.

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