Philosophy of Weibel Instability in Laser Fusion Plasma

Abstract

In this work, have put forward a philosophy of the Weibel instability in laser fusion plasma; these instabilities generated by several mechanisms, namely: the heat transport, the expansion of the plasma and the inverse bremsstrahlung absorption (IB). Several research papers have been presented as well as theoretical models for the relaxation and stability of these modes, which are considered to be very flammable and peaceful on the interaction yield between lasers and plasma. To resolve these modes must be combined with the magnetic field. The stabilization effect due to the coupling of the self-generated magnetic field by Weibel instability with the laser wave field is explicitly showed in recently paper. In these studies, the relativistic and non-relativistic or linear and non-linear effects are taken into account here; the basic equation is the Fokker-Planck (F-P) or Vlasov equation. The best result is that the coupling of self-generated magnetic field with the laser wave causes a stabilizing effect of excited Weibel modes in the all states. Found a decrease in the spectral range of Weibel unstable modes. This decreasing is accompanied by a reduction of orders in the growth rate of instability or even stabilization of these modes. It has been shown that the previous analysis of the Weibel instability due to IB have overestimated the values of the generated magnetic fields.

Weibel instability beyond bi-Maxwellian anisotropy

“…Many astrophysical plasmas, such as the solar wind, are known for having hot non-thermal tails [13]. Laser-plasma interactions are also known for generating hot [14] or depleted tails [15,16]; the latter had the Weibel instability and its characteristics extensively studied in connection with fusion [17][18][19][20][21]. Non-Maxwellian distributions are rarely considered in the literature when performing kinetic analysis.…”