Electron acceleration due to a circularly polarized laser pulse on a downward plasma density ramp in the presence of an azimuthal magnetic field

2018 ◽  
Author(s):  
Jyoti Rajput ◽  
Niti Kant ◽  
Arvinder Singh
Keyword(s):  
Magnetic Field ◽  
Laser Pulse ◽  
Plasma Density ◽  
Electron Acceleration ◽  
Azimuthal Magnetic Field ◽  
Circularly Polarized

Electron acceleration by a circularly polarized electromagnetic wave publishing in plasma with a periodic magnetic field and an axial guide magnetic field

2018 ◽  
Vol 32 (20) ◽  
pp. 1850225 ◽  
Author(s):  
Mehdi Abedi-Varaki
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Wave ◽  
Laser Pulse ◽  
Electron Energy ◽  
Electron Acceleration ◽  
Electron Trajectory ◽  
Field Frequency ◽  
Circularly Polarized ◽  
Runge Kutta Method ◽  
Guide Magnetic Field

In this paper, we study the electron acceleration by a circularly polarized electromagnetic wave propagating through plasma in the presence of a periodic and an axial guide magnetic field. A numerical calculation in MATLAB software was developed by employing the fourth-order Runge–Kutta method for studying the electron energy and electron trajectory in plasma medium. The equations governing the electron momentum and energy which describe electron acceleration by a circularly polarized laser pulse have been obtained. It is shown that by choosing an appropriate wiggler field frequency at short distances, the electron retains an adequate amount of energy. In addition, it is found that due to the simultaneous existence of the wiggler field and field of laser pulse and their combined effects, the electron in the direction of the laser pulse propagating, turns around and subsequently, the electron transverse momentum increases and as a result the electron escapes from the laser pulse near the laser pulse peak. Furthermore, it is seen that by increasing the laser intensity, the electron energy decreases and by decreasing to an appropriate value while employing a wiggler magnetic field, a higher peak of energy is gained.

scholarly journals Inverse Faraday effect in a relativistic laser channel

2001 ◽  
Vol 19 (1) ◽  
pp. 133-136 ◽  
Author(s):  
I. KOSTYUKOV ◽  
G. SHVETS ◽  
N.J. FISCH ◽  
J.M. RAX
Keyword(s):  
Magnetic Field ◽  
Angular Momentum ◽  
Laser Radiation ◽  
Laser Pulse ◽  
Faraday Effect ◽  
Plasma Channel ◽  
Axial Magnetic Field ◽  
Absorbed Energy ◽  
Circularly Polarized ◽  
Inverse Faraday Effect

Interaction between energetic electrons and a circularly polarized laser pulse in a relativistic plasma channel is studied. Laser radiation can be resonantly absorbed by electrons executing betatron oscillations in the channel and absorbing angular momentum from the laser. The absorbed angular momentum manifests itself as a strong axial magnetic field (inverse Faraday effect). The magnitude of this magnetic field is calculated and related to the amount of the absorbed energy.

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