scholarly journals Electromagnetic radiation from laser wakefields in underdense plasma

2014 ◽  
Vol 2 ◽  
Author(s):  
Yue Liu ◽  
Wei-Min Wang ◽  
Zheng-Ming Sheng
Keyword(s):  
Laser Pulse ◽  
Electromagnetic Radiation ◽  
Intense Laser ◽  
Moderate Intensity ◽  
Nonlinear Structure ◽  
Laser Propagation ◽  
Highly Nonlinear ◽  
A Chain ◽  
Underdense Plasma ◽  
Transverse Electron

AbstractIt is demonstrated by simulations and analysis that a wakefield driven by an ultrashort intense laser pulse in underdense plasma can emit tunable electromagnetic radiation along the laser propagation direction. The profile of such a kind of radiation is closely associated with the structure of the laser wakefield. In general, electromagnetic radiation in the terahertz range with its frequency a few times the electron plasma frequency can be generated in the moderate intensity regime. In the highly nonlinear case, a chain of radiation pulses is formed corresponding to the nonlinear structure of the wake. Study shows that the radiation is associated with the self-modulation process of the laser pulse in the wakefield and resulting transverse electron momenta from modulated asymmetric laser fields.

scholarly journals Effects of relativistic electron temperature on parametric instabilities for intense laser propagation in underdense plasma

2014 ◽  
Vol 21 (11) ◽  
pp. 112114 ◽  
Author(s):  
Yao Zhao ◽  
Jun Zheng ◽  
Min Chen ◽  
Lu-Le Yu ◽  
Su-Ming Weng ◽  
...  
Keyword(s):  
Electron Temperature ◽  
Relativistic Electron ◽  
Intense Laser ◽  
Laser Propagation ◽  
Parametric Instabilities ◽  
Underdense Plasma

scholarly journals Self-shaping of a relativistic elliptically Gaussian laser beam in underdense plasmas

2015 ◽  
Vol 33 (2) ◽  
pp. 347-353 ◽  
Author(s):  
T. W. Huang ◽  
C. T. Zhou ◽  
X. T. He
Keyword(s):  
Laser Pulse ◽  
Radial Profile ◽  
Intense Laser ◽  
Laser Beams ◽  
Gaussian Laser Beam ◽  
Radial Profiles ◽  
Underdense Plasmas ◽  
Self Similar ◽  
Will Self ◽  
Underdense Plasma

AbstractSelf-shaping and propagation of intense laser beams of different radial profiles in plasmas is investigated. It is shown that when a relativistic elliptically Gaussian beam propagates through an underdense plasma, its radial profile will self-organize into a circularly symmetric self-similar smooth configuration. Such self-similar propagation can be attributed to a soliton-like structure of the laser pulse. The anisotropic electron distribution results in a circular electric field that redistributes the electrons and modulates the laser pulse to a circular radial shape.

Ion momentum driven by a short intense laser pulse in an underdense plasma

2000 ◽  
Vol 7 (1) ◽  
pp. 375-381 ◽  
Author(s):  
L. M. Gorbunov ◽  
P. Mora ◽  
R. R. Ramazashvili ◽  
A. A. Solodov
Keyword(s):  
Laser Pulse ◽  
Intense Laser ◽  
Intense Laser Pulse ◽  
Underdense Plasma

scholarly journals Ultra-intense laser pulses in near-critical underdense plasmas – radiation reaction and energy partitioning

2017 ◽  
Vol 83 (2) ◽  
Author(s):  
Erik Wallin ◽  
Arkady Gonoskov ◽  
Christopher Harvey ◽  
Olle Lundh ◽  
Mattias Marklund
Keyword(s):  
Laser Pulse ◽  
Pulse Propagation ◽  
Laser Energy ◽  
Radiation Reaction ◽  
Laser Pulses ◽  
High Energy ◽  
Intense Laser ◽  
Long Distance ◽  
Weakly Nonlinear ◽  
Highly Nonlinear

Although, for current laser pulse energies, the weakly nonlinear regime of laser wakefield acceleration is known to be the optimal for reaching the highest possible electron energies, the capabilities of upcoming large laser systems will provide the possibility of running highly nonlinear regimes of laser pulse propagation in underdense or near-critical plasmas. Using an extended particle-in-cell (PIC) model that takes into account all the relevant physics, we show that such regimes can be implemented with external guiding for a relatively long distance of propagation and allow for the stable transformation of laser energy into other types of energy, including the kinetic energy of a large number of high energy electrons and their incoherent emission of photons. This is despite the fact that the high intensity of the laser pulse triggers a number of new mechanisms of energy depletion, which we investigate systematically.

scholarly journals Electron Scattering Processes in Non-Monochromatic and Relativistically Intense Laser Fields

Atoms ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 34 ◽  
Author(s):  
Felipe Cajiao Vélez ◽  
Jerzy Kamiński ◽  
Katarzyna Krajewska
Keyword(s):  
Theoretical Analysis ◽  
Laser Pulse ◽  
Electromagnetic Radiation ◽  
Compton Scattering ◽  
Electron Scattering ◽  
Laser Field ◽  
Intense Laser ◽  
Intense Laser Fields ◽  
Fundamental Laser ◽  
Mott Scattering

The theoretical analysis of four fundamental laser-assisted non-linear scattering processes are summarized in this review. Our attention is focused on Thomson, Compton, Møller and Mott scattering in the presence of intense electromagnetic radiation. Depending on the phenomena under considerations, we model the laser field as a single laser pulse of ultrashort duration (for Thomson and Compton scattering) or non-monochromatic trains of pulses (for Møller and Mott scattering).

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