scholarly journals Polarization effect of fields on vacuum laser acceleration

2007 ◽  
Vol 25 (2) ◽  
pp. 253-257 ◽  
Author(s):  
J.J. XU ◽  
Q. KONG ◽  
Z. CHEN ◽  
P.X. WANG ◽  
W. WANG ◽  
...  
Keyword(s):  
Laser Field ◽  
Laser Intensity ◽  
Force Component ◽  
Saturation Phenomenon ◽  
Circularly Polarized ◽  
Linearly Polarized ◽  
Laser Acceleration ◽  
Acceleration Channel ◽  
The Difference ◽  
Energy Saturation

Concerning laser-driven electron acceleration in vacuum, a comparison was made between using circularly polarized (CP) laser field and linearly polarized (LP) field. It has been found that the main advantage for using CP field is that its acceleration channel occupies relatively larger phase space, which can give rise to greater acceleration efficiency. This feature chiefly comes from the difference in the distribution of the longitudinal electric components of these two kinds of fields. One of the disadvantages with CP field is the “energy saturation” phenomenon as the laser intensity is sufficiently high, resulting from the enhanced Lorentz force component in CP field. Physical explanations of these characteristics are addressed as well.

Modulation instability in nonlinear chiral fiber

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Demissie Jobir Gelmecha ◽  
Ram Sewak Singh
Keyword(s):  
Theoretical Model ◽  
Numerical Simulations ◽  
Pulse Propagation ◽  
Modulation Instability ◽  
Constitutive Relations ◽  
Gain Spectrum ◽  
Circularly Polarized ◽  
Left Handed ◽  
Simulation Results ◽  
The Difference

AbstractIn this paper, the rigorous derivations of generalized coupled chiral nonlinear Schrödinger equations (CCNLSEs) and their modulation instability analysis have been explored theoretically and computationally. With the consideration of Maxwell’s equations and Post’s constitutive relations, a generalized CCNLSE has been derived, which describes the evolution of left-handed circularly polarized (LCP) and right-handed circularly polarized (RCP) components propagating through single-core nonlinear chiral fiber. The analysis of modulation instability in nonlinear chiral fiber has been investigated starting from CCNLSEs. Based on a theoretical model and numerical simulations, the difference on the modulation instability gain spectrum in LCP and RCP components through chiral fiber has been analyzed by considering loss and chirality into account. The obtained simulation results have shown that the loss distorts the sidebands of the modulation instability gain spectrum, while chirality modulates the gain for LCP and RCP components in a different manner. This suggests that adjusting chirality strength may control the loss, and nonlinearity simultaneously provides stable modulated pulse propagation.

On the trajectory of a single electron under the action of a linearly polarized laser field

Optik ◽  
2003 ◽  
Vol 114 (5) ◽  
pp. 235-236
Author(s):  
M.A. Grado-Caffaro ◽  
M. Grado-Caffaro
Keyword(s):  
Laser Field ◽  
Single Electron ◽  
Linearly Polarized

scholarly journals Vacuum laser acceleration of super-ponderomotive electrons using relativistic transparency injection

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
P. K. Singh ◽  
F.-Y. Li ◽  
C.-K. Huang ◽  
A. Moreau ◽  
R. Hollinger ◽  
...  
Keyword(s):  
Laser Field ◽  
Pulse Shaping ◽  
High Energy Physics ◽  
Incident Angle ◽  
Electron Injection ◽  
High Energy ◽  
Intense Laser ◽  
Light Sources ◽  
Very High Energy ◽  
Laser Acceleration

AbstractIntense lasers can accelerate electrons to very high energy over a short distance. Such compact accelerators have several potential applications including fast ignition, high energy physics, and radiography. Among the various schemes of laser-based electron acceleration, vacuum laser acceleration has the merits of super-high acceleration gradient and great simplicity. Yet its realization has been difficult because injecting free electrons into the fast-oscillating laser field is not trivial. Here we demonstrate free-electron injection and subsequent vacuum laser acceleration of electrons up to 20 MeV using the relativistic transparency effect. When a high-contrast intense laser drives a thin solid foil, electrons from the dense opaque plasma are first accelerated to near-light speed by the standing laser wave in front of the solid foil and subsequently injected into the transmitted laser field as the opaque plasma becomes relativistically transparent. It is possible to further optimize the electron injection/acceleration by manipulating the laser polarization, incident angle, and temporal pulse shaping. Our result also sheds light on the fundamental relativistic transparency process, crucial for producing secondary particle and light sources.

scholarly journals Elastic electron-proton scattering in the presence of a circularly polarized laser field

2021 ◽  
Vol 18 (9) ◽  
pp. 096001
Author(s):  
I Dahiri ◽  
M Jakha ◽  
S Mouslih ◽  
B Manaut ◽  
S Taj ◽  
...  
Keyword(s):  
Laser Field ◽  
Elastic Electron ◽  
Proton Scattering ◽  
Circularly Polarized
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