scholarly journals Extended particle absorber for efficient modeling of intense laser–solid interactions

2021 ◽  
Vol 28 (11) ◽  
pp. 112702
Author(s):  
Kyle G. Miller ◽  
Joshua May ◽  
Frederico Fiuza ◽  
Warren B. Mori
Keyword(s):  
Intense Laser ◽  
Laser Solid Interactions ◽  
Efficient Modeling

Electron acceleration in intense laser-solid interactions at parallel incidence

2021 ◽  
Vol 51 (9) ◽  
pp. 833-837
Author(s):  
X Shen ◽  
Alexander M Pukhov ◽  
S E Perevalov ◽  
A A Solov'ev
Keyword(s):  
Electron Acceleration ◽  
Intense Laser ◽  
Laser Solid Interactions

scholarly journals Escaping Electrons from Intense Laser-Solid Interactions as a Function of Laser Spot Size

2018 ◽  
Vol 167 ◽  
pp. 02001 ◽  
Author(s):  
Dean Rusby ◽  
Ross Gray ◽  
Nick Butler ◽  
Rachel Dance ◽  
Graeme Scott ◽  
...  
Keyword(s):  
Rear Surface ◽  
Spot Size ◽  
Intense Laser ◽  
Laser Spot Size ◽  
Particle In Cell ◽  
High Intensity Laser ◽  
Electric Potentials ◽  
Initial Interaction ◽  
Intensity Laser ◽  
Laser Solid Interactions

The interaction of a high-intensity laser with a solid target produces an energetic distribution of electrons that pass into the target. These electrons reach the rear surface of the target creating strong electric potentials that act to restrict the further escape of additional electrons. The measurement of the angle, flux and spectra of the electrons that do escape gives insights to the initial interaction. Here, the escaping electrons have been measured using a differentially filtered image plate stack, from interactions with intensities from mid 1020-1017 W/cm2, where the intensity has been reduced by defocussing to increase the size of the focal spot. An increase in electron flux is initially observed as the intensity is reduced from 4x1020 to 6x1018 W/cm2. The temperature of the electron distribution is also measured and found to be relatively constant. 2D particle-in-cell modelling is used to demonstrate the importance of pre-plasma conditions in understanding these observations.

scholarly journals High resolution bremsstrahlung and fast electron characterization in ultrafast intense laser–solid interactions

2013 ◽  
Vol 15 (12) ◽  
pp. 123038 ◽  
Author(s):  
C Zulick ◽  
B Hou ◽  
F Dollar ◽  
A Maksimchuk ◽  
J Nees ◽  
...  
Keyword(s):  
High Resolution ◽  
Fast Electron ◽  
Intense Laser ◽  
Laser Solid Interactions

Modeling terahertz emission from the target rear side during intense laser-solid interactions

2019 ◽  
Vol 100 (5) ◽  
Author(s):  
A. Woldegeorgis ◽  
S. Herzer ◽  
M. Almassarani ◽  
S. Marathapalli ◽  
A. Gopal
Keyword(s):  
Intense Laser ◽  
Rear Side ◽  
Terahertz Emission ◽  
Laser Solid Interactions

scholarly journals Particle-in-cell simulations of laser–plasma interactions at solid densities and relativistic intensities: the role of atomic processes

2018 ◽  
Vol 6 ◽  
Author(s):  
D. Wu ◽  
X. T. He ◽  
W. Yu ◽  
S. Fritzsche
Keyword(s):  
Electromagnetic Fields ◽  
Ohmic Heating ◽  
Intense Laser ◽  
Bremsstrahlung Radiation ◽  
Simulation Code ◽  
Energetic Electrons ◽  
Particle In Cell ◽  
Laser Plasma Interactions ◽  
Collisional Damping ◽  
Laser Solid Interactions

Direct numerical simulation of intense laser–solid interactions is still of great challenges, because of the many coupled atomic and plasma processes, such as ionization dynamics, collision among charged particles and collective electromagnetic fields, to name just a few. Here, we develop a new particle-in-cell (PIC) simulation code, which enables us to calculate laser–solid interactions in a more realistic way. This code is able to cover almost ‘all’ the coupled physical processes. As an application of the new code, the generation and transport of energetic electrons in front of and within the solid target when irradiated by intense laser beams are studied. For the considered case, in which laser intensity is $10^{20}~\text{W}\cdot \text{cm}^{-2}$ and pre-plasma scale length in front of the solid is $10~\unicode[STIX]{x03BC}\text{m}$, several quantitative conclusions are drawn: (i) the collisional damping (although it is very weak) can significantly affect the energetic electrons generation in front of the target, (ii) the Bremsstrahlung radiation will be enhanced by 2–3 times when the solid is dramatically heated and ionized, (iii) the ‘cut-off’ electron energy is lowered by an amount of 25% when both collision damping and Bremsstrahlung radiations are included, and (iv) the resistive electromagnetic fields due to Ohmic heating play nonignorable roles and must be taken into account in such interactions.

Positron acceleration by sheath field in ultra-intense laser–solid interactions

2017 ◽  
Vol 59 (4) ◽  
pp. 045015 ◽  
Author(s):  
Yonghong Yan ◽  
Yuchi Wu ◽  
Jia Chen ◽  
Minghai Yu ◽  
Kegong Dong ◽  
...  
Keyword(s):  
Intense Laser ◽  
Laser Solid Interactions

scholarly journals Deflection of MeV Electrons by Self-Generated Magnetic Fields in Intense Laser-Solid Interactions

2013 ◽  
Vol 111 (24) ◽  
Author(s):  
F. Pérez ◽  
A. J. Kemp ◽  
L. Divol ◽  
C. D. Chen ◽  
P. K. Patel
Keyword(s):  
Magnetic Fields ◽  
Intense Laser ◽  
Laser Solid Interactions
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