scholarly journals Particle-in-cell simulations of quasi-phase matched direct laser electron acceleration in density-modulated plasma waveguides

2014 ◽  
Vol 21 (9) ◽  
pp. 093109 ◽  
Author(s):  
M.-W. Lin ◽  
Y.-L. Liu ◽  
S.-H. Chen ◽  
I. Jovanovic
Keyword(s):  
Electron Acceleration ◽  
Particle In Cell ◽  
Direct Laser ◽  
Plasma Waveguides

scholarly journals Electron acceleration in underdense plasmas described with a classical effective theory

2015 ◽  
Vol 33 (2) ◽  
pp. 307-313 ◽  
Author(s):  
M. A. Pocsai ◽  
S. Varró ◽  
I. F. Barna
Keyword(s):  
Experimental Data ◽  
Continuous Medium ◽  
Equations Of Motion ◽  
Electron Acceleration ◽  
Index Of Refraction ◽  
Effective Theory ◽  
Electron Motion ◽  
Particle In Cell ◽  
Underdense Plasmas ◽  
Relativistic Equations

AbstractAn effective theory of laser–plasma-based particle acceleration is presented. Here we treated the plasma as a continuous medium with an index of refraction nm in which a single electron propagates. Because of the simplicity of this model, we did not perform particle-in-cell (PIC) simulations in order to study the properties of the electron acceleration. We studied the properties of the electron motion due to the Lorentz force and the relativistic equations of motion were numerically solved and analyzed. We compared our results with PIC simulations and experimental data.

Particle‐in‐cell simulations of stochastic electron acceleration

1989 ◽  
Vol 1 (12) ◽  
pp. 2530-2532 ◽  
Author(s):  
K. Akimoto ◽  
H. Karimabadi
Keyword(s):  
Electron Acceleration ◽  
Particle In Cell

Ultrahigh-intensity optical slow-wave structure for direct laser electron acceleration

2008 ◽  
Vol 25 (7) ◽  
pp. B137 ◽  
Author(s):  
Andrew G. York ◽  
B. D. Layer ◽  
J. P. Palastro ◽  
T. M. Antonsen ◽  
H. M. Milchberg
Keyword(s):  
Slow Wave ◽  
Wave Structure ◽  
Electron Acceleration ◽  
Slow Wave Structure ◽  
Direct Laser

Efficient generation of proton bunches by intense laser pulse with a double-slice-foil target

2012 ◽  
Vol 78 (4) ◽  
pp. 491-496
Author(s):  
JUN ZHENG ◽  
ZHENG-MING SHENG ◽  
JIN-LU LIU ◽  
WEI-MIN ZHOU ◽  
HAN XU ◽  
...  
Keyword(s):  
Double Layer ◽  
Laser Pulses ◽  
Intense Laser ◽  
Particle In Cell ◽  
Intense Laser Pulses ◽  
Proton Beam Energy ◽  
Direct Laser ◽  
Laser Acceleration ◽  
Foil Target ◽  
Target Design

AbstractA double-slice-foil target is proposed for the generation of quasi-monoenergetic proton bunches by intense laser pulses. In this new target structure, two symmetrical solid slices are adjoined obliquely to the front side of a plane double-layer target. Two-dimensional particle-in-cell simulations show that a large number of hot electrons are pulled out from solid slices and accelerated forward by direct laser acceleration, which lead to significant enhancement of the sheath field and the produced proton beam energy as compared with the normal plane double-layer target and some other modified targets. It appears that well-collimated proton bunches with energy larger than 200 MeV can be produced at the focused laser intensity of about 1021W/cm2 with the proposed target design.

scholarly journals Effects on magnetic reconnection of a density asymmetry across the current sheet

2008 ◽  
Vol 26 (8) ◽  
pp. 2471-2483 ◽  
Author(s):  
K. G. Tanaka ◽  
A. Retinò ◽  
Y. Asano ◽  
M. Fujimoto ◽  
I. Shinohara ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
Magnetic Reconnection ◽  
Current Sheet ◽  
Three Dimensional ◽  
Flow Region ◽  
Electron Acceleration ◽  
Particle In Cell ◽  
Line Structure ◽  
Simulation Results

Abstract. The magnetopause (MP) reconnection is characterized by a density asymmetry across the current sheet. The asymmetry is expected to produce characteristic features in the reconnection layer. Here we present a comparison between the Cluster MP crossing reported by Retinò et al. (2006) and virtual observations in two-dimensional particle-in-cell simulation results. The simulation, which includes the density asymmetry but has zero guide field in the initial condition, has reproduced well the observed features as follows: (1) The prominent density dip region is detected at the separatrix region (SR) on the magnetospheric (MSP) side of the MP. (2) The intense electric field normal to the MP is pointing to the center of the MP at the location where the density dip is detected. (3) The ion bulk outflow due to the magnetic reconnection is seen to be biased towards the MSP side. (4) The out-of-plane magnetic field (the Hall magnetic field) has bipolar rather than quadrupolar structure, the latter of which is seen for a density symmetric case. The simulation also showed rich electron dynamics (formation of field-aligned beams) in the proximity of the separatrices, which was not fully resolved in the observations. Stepping beyond the simulation-observation comparison, we have also analyzed the electron acceleration and the field line structure in the simulation results. It is found that the bipolar Hall magnetic field structure is produced by the substantial drift of the reconnected field lines at the MSP SR due to the enhanced normal electric field. The field-aligned electrons at the same MSP SR are identified as the gun smokes of the electron acceleration in the close proximity of the X-line. We have also analyzed the X-line structure obtained in the simulation to find that the density asymmetry leads to a steep density gradient in the in-flow region, which may lead to a non-stationary behavior of the X-line when three-dimensional freedom is taken into account.

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