scholarly journals Generation mechanism of 100 MG magnetic fields in the interaction of ultra-intense laser pulse with nanostructured target

2020 ◽  
Vol 8 ◽  
Author(s):  
J. M. Tian ◽  
H. B. Cai ◽  
W. S. Zhang ◽  
E. H. Zhang ◽  
B. Du ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Laser Pulse ◽  
Analytical Model ◽  
Plasma Phys ◽  
Intense Laser ◽  
Relativistic Electrons ◽  
Intense Laser Pulse ◽  
Hydrodynamic Description ◽  
Nanostructured Arrays

Experimental and simulation data [Moreau et al., Plasma Phys. Control. Fusion 62, 014013 (2019); Kaymak et al., Phys. Rev. Lett. 117, 035004 (2016)] indicate that self-generated magnetic fields play an important role in enhancing the flux and energy of relativistic electrons accelerated by ultra-intense laser pulse irradiation with nanostructured arrays. A fully relativistic analytical model for the generation of the magnetic field based on electron magneto-hydrodynamic description is presented here. The analytical model shows that this self-generated magnetic field originates in the nonparallel density gradient and fast electron current at the interfaces of a nanolayered target. A general formula for the self-generated magnetic field is found, which closely agrees with the simulation scaling over the relevant intensity range. The result is beneficial to the experimental designs for the interaction of the laser pulse with the nanostructured arrays to improve laser-to-electron energy coupling and the quality of forward hot electrons.

Effect of obliquely external magnetic field on the intense laser pulse propagating in plasma medium

2020 ◽  
Vol 34 (07) ◽  
pp. 2050044
Author(s):  
Mehdi Abedi-Varaki
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Laser Pulse ◽  
Magnetoactive Plasma ◽  
Spot Size ◽  
The Self ◽  
Intense Laser ◽  
Intense Laser Pulse ◽  
Laser Spot Size ◽  
Self Focusing

In this paper, self-focusing of intense laser pulse propagating along the obliquely external magnetic field on the collisional magnetoactive plasma by using the perturbation theory have been studied. The wave equation describing the interaction of intense laser pulse with collisional magnetoactive plasma is derived. In addition, employing source-dependent expansion (SDE) method, the analysis of the laser spot-size is discussed. It is shown that with increasing of the angle in obliquely external magnetic field, the spot-size of laser pulse decreases and as a result laser pulse becomes more focused. Furthermore, it is concluded that the self-focusing quality of the laser pulse has been enhanced due to the presence of obliquely external magnetic field in the collisional magnetoactive plasma. Besides, it is seen that with increasing of [Formula: see text], the laser spot-size reduces and subsequently the self-focusing of the laser pulse in plasma enhances. Moreover, it is found that changing the collision effect in the magnetoactive plasma leads to increases of self-focusing properties.

Large Quasistatic Magnetic Fields Generated by a Relativistically Intense Laser Pulse Propagating in a Preionized Plasma

1998 ◽  
Vol 80 (23) ◽  
pp. 5137-5140 ◽  
Author(s):  
M. Borghesi ◽  
A. J. Mackinnon ◽  
R. Gaillard ◽  
O. Willi ◽  
A. Pukhov ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Laser Pulse ◽  
Intense Laser ◽  
Intense Laser Pulse

scholarly journals Acceleration of high-quality, well-collimated return beam of relativistic electrons by intense laser pulse in a low-density plasma

2004 ◽  
Vol 22 (3) ◽  
pp. 307-314 ◽  
Author(s):  
LI BAIWEN ◽  
S. ISHIGURO ◽  
M.M. šKORIĆ ◽  
H. TAKAMARU ◽  
T. SATO
Keyword(s):  
Electron Beam ◽  
Laser Pulse ◽  
Plasma Layer ◽  
Time History ◽  
Electron Acceleration ◽  
Intense Laser ◽  
Acceleration Process ◽  
Relativistic Electrons ◽  
Intense Laser Pulse ◽  
High Quality

The mechanism of electron acceleration by intense laser pulse interacting with an underdense plasma layer is examined by one-dimensional particle-in-cell (1D-PIC) simulations. The standard dephasing limit and the electron acceleration process are discussed briefly. A new phenomenon, of short high-quality, well-collimated return relativistic electron beam with thermal energy spread, is observed in the direction opposite to laser propagation. The process of the electron beam formation, its characteristics, and the time-history inxandpxspace for test electrons in the beam, are analyzed and exposed clearly. Finally, an estimate for the maximum electron energy appears in a good agreement with simulation results.

scholarly journals Multi probes measurements at the PALS Facility Research Centre during high intense laser pulse interactions with various target materials

2018 ◽  
Vol 167 ◽  
pp. 03009 ◽  
Author(s):  
Massimo De Marco ◽  
Josef Krása ◽  
Jakub Cikhardt ◽  
Fabrizio Consoli ◽  
Riccardo De Angelis ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Laser Pulse ◽  
Microstrip Antenna ◽  
Wide Band ◽  
Intense Laser ◽  
Research Centre ◽  
Target Chamber ◽  
Intense Laser Pulse ◽  
Target Holder ◽  
Target Probe

During the interaction of high intense laser pulse with solid target, a large amount of hot electrons is produced and a giant Electromagnetic Pulse (EMP) is generated due to the current flowing into the system target–target holder, as well as due to the escaping charged particles in vacuum. EMP production for different target materials is investigated inside and outside the target chamber, using monopole antenna, super wide-band microstrip antenna and Moebius antenna. The EMP consists in a fast transient magnetic field lasting hundreds of nanosecond with frequencies ranging from MHz to tens of GHz. Measurements of magnetic field and return target current in the range of kA were carried out by an inductive target probe (Cikhardt J. et al. Rev. Sci. Instrum. 85 (2014) 103507).

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