Ultra-intense laser propagation with measurement of backscattered light image and spectrum

2000 ◽  
Author(s):  
Takeshi Miyakoshi ◽  
Kazuo A. Tanaka ◽  
Ryosuke Kodama ◽  
Kunioki Mima ◽  
Tatsuhiko Yamanaka ◽  
...  
2021 ◽  
Author(s):  
Dong-Ning Yue ◽  
Min Chen ◽  
Yao Zhao ◽  
Pan-Fei Geng ◽  
Xiao-Hui Yuan ◽  
...  

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.


1996 ◽  
Vol 3 (5) ◽  
pp. 1700-1708 ◽  
Author(s):  
T. C. Chiou ◽  
T. Katsouleas ◽  
W. B. Mori

2000 ◽  
Vol 18 (4) ◽  
pp. 595-600 ◽  
Author(s):  
K. KRUSHELNICK ◽  
E. CLARK ◽  
Z. NAJMUDIN ◽  
M. SALVATI ◽  
M.I.K. SANTALA ◽  
...  

Experiments were performed using high-power laser pulses (greater than 50 TW) focused into underdense helium, neon, or deuterium plasmas (ne ≤ 5 × 1019 cm−3). Ions having energies greater than 300 keV were measured to be produced primarily at 90° to the axis of laser propagation. Ion energies greater than 6 MeV were recorded from interactions with neon. Spatially resolved pinhole images of the ion emission were also obtained and were used to estimate the intensity of the focused radiation in the interaction region.


2014 ◽  
Vol 21 (11) ◽  
pp. 112114 ◽  
Author(s):  
Yao Zhao ◽  
Jun Zheng ◽  
Min Chen ◽  
Lu-Le Yu ◽  
Su-Ming Weng ◽  
...  

Author(s):  
Yue Liu ◽  
Wei-Min Wang ◽  
Zheng-Ming Sheng

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.


2012 ◽  
Vol 19 (7) ◽  
pp. 073111 ◽  
Author(s):  
D. K. Singh ◽  
J. R. Davies ◽  
G. Sarri ◽  
F. Fiuza ◽  
L. O. Silva

Author(s):  
C. J. Joachain ◽  
N. J. Kylstra ◽  
R. M. Potvliege

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