Evolution of filaments and associated magnetic fields produced by the Weibel Instability in two counterstreaming laser plasmas

2018 ◽  
Vol 25 (6) ◽  
pp. 062123
Author(s):  
Hui-Ya Liu ◽  
Quan-Li Dong ◽  
Sheng-Zhe Ji ◽  
Ning Kang ◽  
Shen-Lei Zhou ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Weibel Instability ◽  
Laser Plasmas

scholarly journals The generation of magnetic fields by the Biermann battery and the interplay with the Weibel instability

2016 ◽  
Vol 23 (5) ◽  
pp. 056304 ◽  
Author(s):  
K. M. Schoeffler ◽  
N. F. Loureiro ◽  
R. A. Fonseca ◽  
L. O. Silva
Keyword(s):  
Magnetic Fields ◽  
Weibel Instability ◽  
Biermann Battery

scholarly journals The generation of magnetic fields by the Weibel instability

2006 ◽  
Vol 327 (5-6) ◽  
pp. 443-447 ◽  
Author(s):  
Y. Fujita ◽  
T. N. Kato
Keyword(s):  
Magnetic Fields ◽  
Weibel Instability

scholarly journals PARTICLE ACCELERATION, MAGNETIC FIELD GENERATION, AND ASSOCIATED EMISSION IN COLLISIONLESS RELATIVISTIC JETS

2008 ◽  
Vol 17 (10) ◽  
pp. 1761-1767 ◽  
Author(s):  
K.-I. NISHIKAWA ◽  
Y. MIZUNO ◽  
G. J. FISHMAN ◽  
P. HARDEE
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Small Scale ◽  
Spectral Structure ◽  
Relativistic Jets ◽  
Weibel Instability ◽  
Electron Positron ◽  
Jitter Radiation

Nonthermal radiation observed from astrophysical systems containing relativistic jets and shocks, e.g., active galactic nuclei (AGNs), gamma-ray bursts (GRBs), and galactic microquasar systems usually have power-law emission spectra. Recent PIC simulations using injected relativistic electron-ion (electron-positron) jets show that acceleration occurs within the downstream jet. Shock acceleration is an ubiquitous phenomenon in astrophysical plasmas. Plasma waves and their associated instabilities (e.g., the Buneman instability, other two-streaming instability, and the Weibel instability) created in the shocks are responsible for particle (electron, positron, and ion) acceleration. The simulation results show that the Weibel instability is responsible for generating and amplifying highly nonuniform, small-scale magnetic fields. These magnetic fields contribute to the electrons' transverse deflection behind the jet head. The "jitter" radiation from deflected electrons has different properties to synchrotron radiation which assumes a uniform magnetic field. This jitter radiation may be important to understanding the complex time evolution and/or spectral structure in gamma-ray bursts, relativistic jets, and supernova remnants.

Spatial-temporal distribution of magnetic fields in laser plasmas

1991 ◽  
Vol 21 (4) ◽  
pp. 434-438 ◽  
Author(s):  
N S Zakharov ◽  
I S Shaĭnoga ◽  
N I Shentsev
Keyword(s):  
Magnetic Fields ◽  
Temporal Distribution ◽  
Laser Plasmas

Self-generated magnetic fields in laser plasmas

1973 ◽  
Vol 16 (10) ◽  
pp. 1778 ◽  
Author(s):  
M. M. Widner
Keyword(s):  
Magnetic Fields ◽  
Laser Plasmas

scholarly journals Weibel instability by ultraintense laser pulses

1999 ◽  
Vol 17 (3) ◽  
pp. 515-518 ◽  
Author(s):  
T. OKADA ◽  
I. SAJIKI ◽  
K. SATOU
Keyword(s):  
Magnetic Fields ◽  
Velocity Distribution ◽  
Electromagnetic Waves ◽  
Laser Pulses ◽  
Electron Velocity ◽  
Electron Velocity Distribution ◽  
Loss Mechanism ◽  
Weibel Instability ◽  
Particle In Cell ◽  
Underdense Plasmas

Particle-in-cell (PIC) simulations show that an anisotropic electron velocity distribution is demonstrated by ultraintense laser pulses in underdense plasmas. Recently, it is reported that the anisotropy has been experimentally demonstrated in laser-produced plasmas. It is also pointed out that gigagauss magnetic fields are generated by ultraintense laser pulses. We have already published that the Weibel-type electromagnetic instabilities can be theoretically excited by electrons in a velocity distribution with anisotropic temperature. If these electromagnetic waves are excited, the target may have a possibility not only to give rise to a new type of energy loss mechanism but also to influence the implosion characteristics. In this work, we present PIC simulation of the interaction of ultraintense laser pulses with plasmas. Intense self-generated magnetic fields is produced by the mechanism of Weibel instability in underdense plasmas.

scholarly journals RADIATION FROM RELATIVISTIC SHOCKS WITH TURBULENT MAGNETIC FIELDS

2010 ◽  
Vol 19 (06) ◽  
pp. 715-721 ◽  
Author(s):  
K.-I. NISHIKAWA ◽  
J. NIMIEC ◽  
M. MEDVEDEV ◽  
B. ZHANG ◽  
P. HARDEE ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Particle Acceleration ◽  
Magnetic Fields ◽  
Weibel Instability ◽  
Pair Plasma ◽  
Nonlinear Stage ◽  
Relativistic Shocks ◽  
Electron Positron ◽  
Ambient Electron

Using our new 3D relativistic electromagnetic particle (REMP) code parallelized with MPI, we investigated long-term particle acceleration associated with a relativistic electron–positron jet propagating in an unmagnetized ambient electron–positron plasma. We have also performed simulations with electron-ion jets. The simulations were performed using a much longer simulation system than our previous simulations in order to investigate the full nonlinear stage of the Weibel instability for electron–positron jets and its particle acceleration mechanism. Cold jet electrons are thermalized and ambient electrons are accelerated in the resulting shocks for pair plasma case. Acceleration of ambient electrons leads to a maximum ambient electron density three times larger than the original value for pair plasmas. Behind the bow shock in the jet shock strong electromagnetic fields are generated. These fields may lead to time-dependent afterglow emission. We calculated radiation from electrons propagating in a uniform parallel magnetic field to verify the technique. We also used the new technique to calculate emission from electrons based on simulations with a small system with two different cases for Lorentz factors (15 and 100). We obtained spectra which are consistent with those generated from electrons propagating in turbulent magnetic fields with red noise. This turbulent magnetic field is similar to the magnetic field generated at an early nonlinear stage of the Weibel instability.

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