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Title: Stabilization effect of Weibel modes in relativistic laser fusion plasma

Abstract

In this work, the Weibel instability (WI) due to inverse bremsstrahlung (IB) absorption in a laser fusion plasma has been investigated. The stabilization effect due to the coupling of the self-generated magnetic field by WI with the laser wave field is explicitly shown. In this study, the relativistic effects are taken into account. Here, the basic equation is the relativistic Fokker-Planck (F-P) equation. The main obtained result is that the coupling of self-generated magnetic field with the laser wave causes a stabilizing effect of excited Weibel modes. We found a decrease in the spectral range of Weibel unstable modes. This decreasing is accompanied by a reduction of two orders in the growth rate of instable Weibel modes or even stabilization of these modes. It has been shown that the previous analysis of the Weibel instability due to IB has overestimated the values of the generated magnetic fields. Therefore, the generation of magnetic fields by the WI due to IB should not affect the experiences of an inertial confinement fusion.

Authors:
;  [1]
  1. Laboratoire de Physique des rayonnements et de leurs interactions avec la matière (PRIMALAB), département de Physique, faculté des Sciences de la Matière, Université de Batna 1, 05000DZ, Batna (Algeria)
Publication Date:
OSTI Identifier:
22600132
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 23; Journal Issue: 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ABSORPTION; BREMSSTRAHLUNG; FOKKER-PLANCK EQUATION; INERTIAL CONFINEMENT; LASERS; MAGNETIC FIELDS; PLASMA; PLASMA INSTABILITY; RELATIVISTIC RANGE; STABILIZATION

Citation Formats

Belghit, Slimen, E-mail: Belghit.slimen@gmail.com, and Sid, Abdelaziz, E-mail: Sid-abdelaziz@hotmail.com. Stabilization effect of Weibel modes in relativistic laser fusion plasma. United States: N. p., 2016. Web. doi:10.1063/1.4953106.
Belghit, Slimen, E-mail: Belghit.slimen@gmail.com, & Sid, Abdelaziz, E-mail: Sid-abdelaziz@hotmail.com. Stabilization effect of Weibel modes in relativistic laser fusion plasma. United States. doi:10.1063/1.4953106.
Belghit, Slimen, E-mail: Belghit.slimen@gmail.com, and Sid, Abdelaziz, E-mail: Sid-abdelaziz@hotmail.com. Wed . "Stabilization effect of Weibel modes in relativistic laser fusion plasma". United States. doi:10.1063/1.4953106.
@article{osti_22600132,
title = {Stabilization effect of Weibel modes in relativistic laser fusion plasma},
author = {Belghit, Slimen, E-mail: Belghit.slimen@gmail.com and Sid, Abdelaziz, E-mail: Sid-abdelaziz@hotmail.com},
abstractNote = {In this work, the Weibel instability (WI) due to inverse bremsstrahlung (IB) absorption in a laser fusion plasma has been investigated. The stabilization effect due to the coupling of the self-generated magnetic field by WI with the laser wave field is explicitly shown. In this study, the relativistic effects are taken into account. Here, the basic equation is the relativistic Fokker-Planck (F-P) equation. The main obtained result is that the coupling of self-generated magnetic field with the laser wave causes a stabilizing effect of excited Weibel modes. We found a decrease in the spectral range of Weibel unstable modes. This decreasing is accompanied by a reduction of two orders in the growth rate of instable Weibel modes or even stabilization of these modes. It has been shown that the previous analysis of the Weibel instability due to IB has overestimated the values of the generated magnetic fields. Therefore, the generation of magnetic fields by the WI due to IB should not affect the experiences of an inertial confinement fusion.},
doi = {10.1063/1.4953106},
journal = {Physics of Plasmas},
number = 6,
volume = 23,
place = {United States},
year = {Wed Jun 15 00:00:00 EDT 2016},
month = {Wed Jun 15 00:00:00 EDT 2016}
}