Generation of Helical and Axial Magnetic Fields by the Relativistic Laser Pulses in Under-dense Plasma: Three-Dimensional Particle-in-Cell Simulation

2002 ◽  
Vol 19 (7) ◽  
pp. 959-961 ◽  
Author(s):  
Zheng Chun-Yang ◽  
Zhu Shao-Ping ◽  
He Xian-Tu
Keyword(s):  
Magnetic Fields ◽  
Dense Plasma ◽  
Three Dimensional ◽  
Laser Pulses ◽  
Particle In Cell ◽  
Cell Simulation

scholarly journals Efficient acceleration of a small dense plasma pellet by consecutive action of multiple short intense laser pulses

2009 ◽  
Vol 27 (4) ◽  
pp. 629-634 ◽  
Author(s):  
X. Wang ◽  
W. Yu ◽  
M.Y. Yu ◽  
V.K. Senecha ◽  
H. Xu ◽  
...  
Keyword(s):  
Dense Plasma ◽  
Ponderomotive Force ◽  
Laser Pulses ◽  
Intense Laser ◽  
Energetic Ions ◽  
Practical Applications ◽  
Particle In Cell ◽  
High Speeds ◽  
Intense Laser Pulses ◽  
Cell Simulation

AbstractThe acceleration of a micrometer-sized plasma pellet at 100 critical densities (1023 cm−3) by consecutive application of ultra-short ultra-intense laser pulses is studied using two-dimensional particle-in-cell simulation. It is shown that due to the repeated actions of the laser ponderomotive force, a small dense plasma pellet can be efficiently accelerated, with a considerable fraction of the plasma ions accelerated to high speeds. The proposed scheme can provide a high-density flux of energetic ions, which should be valuable in many practical applications.

A mechanism for self-generated magnetic fields in the interaction of ultra-intense laser pulses with thin plasma targets

2009 ◽  
Vol 75 (1) ◽  
pp. 91-98 ◽  
Author(s):  
A. ABUDUREXITI ◽  
T. OKADA ◽  
S. ISHIKAWA
Keyword(s):  
Magnetic Fields ◽  
Laser Pulses ◽  
Underlying Mechanism ◽  
Intense Laser ◽  
Particle In Cell ◽  
Laser Plasma Interactions ◽  
Intense Laser Pulses ◽  
Plasma Target ◽  
Cell Simulation ◽  
Thin Plasma

AbstractIn the study of the interaction of ultra-intense laser pulses with thin plasma targets there appears self-generated magnetic fields in the plasma target. The strong magnetic fields were directly measured in the plasma target, and were attributed to a mechanism of non-parallel electron temperature and density gradients. These magnetic fields can become strong enough to significantly affect the plasma transport. The underlying mechanism of the self-generated magnetic fields in the ultra-intense laser–plasma interactions is presented by using a two-dimensional particle-in-cell simulation.

Post-solitons and electron vortices generated by femtosecond intense laser interacting with uniform near-critical-density plasmas

2021 ◽  
Author(s):  
Dong-Ning Yue ◽  
Min Chen ◽  
Yao Zhao ◽  
Pan-Fei Geng ◽  
Xiao-Hui Yuan ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Critical Density ◽  
Laser Pulses ◽  
Intense Laser ◽  
Nonlinear Structures ◽  
Particle In Cell ◽  
Laser Propagation ◽  
Laser Driver ◽  
Linearly Polarized ◽  
Dimensional Simulation

Abstract Generation of nonlinear structures, such as stimulated Raman side scattering waves, post-solitons and electron vortices, during ultra-short intense laser pulse transportation in near-critical-density (NCD) plasmas are studied by using multi-dimensional particle-in-cell (PIC) simulations. In two-dimensional geometries, both P- and S- polarized laser pulses are used to drive these nonlinear structures and to check the polarization effects on them. In the S-polarized case, the scattered waves can be captured by surrounding plasmas leading to the generation of post-solitons, while the main pulse excites convective electric currents leading to the formation of electron vortices through Kelvin-Helmholtz instability (KHI). In the P-polarized case, the scattered waves dissipate their energy by heating surrounding plasmas. Electron vortices are excited due to the hosing instability of the drive laser. These polarization dependent physical processes are reproduced in two different planes perpendicular to the laser propagation direction in three-dimensional simulation with linearly polarized laser driver. The current work provides inspiration for future experiments of laser-NCD plasma interactions.

Electrostatic particle-in-cell simulation of heat flux mitigation using magnetic fields

2016 ◽  
Vol 82 (5) ◽  
Author(s):  
Karl Felix Lüskow ◽  
S. Kemnitz ◽  
G. Bandelow ◽  
J. Duras ◽  
D. Kahnfeld ◽  
...  
Keyword(s):  
Heat Flux ◽  
Magnetic Fields ◽  
Turbulent Transport ◽  
Optical Emission ◽  
Emission Region ◽  
Transport Channel ◽  
Particle In Cell ◽  
Heat Deposition ◽  
Cell Simulation ◽  
Pic Method

The particle-in-cell (PIC) method was used to simulate heat flux mitigation experiments with partially ionised argon. The experiments demonstrate the possibility of reducing heat flux towards a target using magnetic fields. Modelling using the PIC method is able to reproduce the heat flux mitigation qualitatively. This is driven by modified electron transport. Electrons are magnetised and react directly to the external magnetic field. In addition, an increase of radial turbulent transport is also needed to explain the experimental observations in the model. Close to the target an increase of electron density is created. Due to quasi-neutrality, ions follow the electrons. Charge exchange collisions couple the dynamics of the neutrals to the ions and reduce the flow velocity of neutrals by radial momentum transport and subsequent losses. By this, the dominant heat-transport channel by neutrals gets reduced and a reduction of the heat deposition, similar to the experiment, is observed. Using the simulation a diagnostic module for optical emission is developed and its results are compared with spectroscopic measurements and photos from the experiment. The results of this study are in good agreement with the experiment. Experimental observations such as a shrank bright emission region close to the nozzle exit, an additional emission in front of the target and an overall change in colour to red are reproduced by the simulation.

scholarly journals Nondrifting relativistic electromagnetic solitons in plasmas

2003 ◽  
Vol 21 (4) ◽  
pp. 541-544 ◽  
Author(s):  
M. LONTANO ◽  
M. BORGHESI ◽  
S.V. BULANOV ◽  
T.Z. ESIRKEPOV ◽  
D. FARINA ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Low Frequency ◽  
Laser Pulses ◽  
Particle In Cell ◽  
High Intensity Laser ◽  
Theoretical Investigations ◽  
Plasma Response ◽  
Warm Plasma ◽  
Electromagnetic Solitons

Low-frequency, relativistic, subcycle solitary waves are found in two-dimensional and three-dimensional particle-in-cell (PIC) numerical simulations, as a result of the interaction of ultrashort, high-intensity laser pulses with plasmas. Moreover, nondrifting, subcycle relativistic electromagnetic solitons have been obtained as solutions of the hydrodynamic equations for an electron–ion warm plasma, by assuming the quasi-neutrality character of the plasma response. In addition, the formation of long-living macroscopic soliton-like structures has been experimentally observed by means of the proton imaging diagnostics. Several common features result from these investigations, as, for example, the quasi-neutral plasma response to the soliton radiation, in the long-term evolution of the system, which leads to the almost complete expulsion of the plasma from the region where the electromagnetic radiation is concentrated, even at subrelativistic field intensity. The results of the theoretical investigations are reviewed with special attention to these similarities.

scholarly journals Three-dimensional particle-in-cell simulation study of a relativistic magnetron

1999 ◽  
Vol 6 (2) ◽  
pp. 603-613 ◽  
Author(s):  
R. W. Lemke ◽  
T. C. Genoni ◽  
T. A. Spencer
Keyword(s):  
Simulation Study ◽  
Three Dimensional ◽  
Particle In Cell ◽  
Relativistic Magnetron ◽  
Cell Simulation

scholarly journals Thrust Evaluation of Small-Scale Magnetic Sail Spacecraft by Three-Dimensional Particle-in-Cell Simulation

2014 ◽  
Vol 30 (1) ◽  
pp. 186-196 ◽  
Author(s):  
Yasumasa Ashida ◽  
Hiroshi Yamakawa ◽  
Ikkoh Funaki ◽  
Hideyuki Usui ◽  
Yoshihiro Kajimura ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Small Scale ◽  
Particle In Cell ◽  
Cell Simulation
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