PMID: 15244748Jul 13, 2004Paper

Laser self-focusing in the presence of quasistatic axial direct current

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Hai LinZhizhan Xu

Abstract

We try to understand the presence of a quasistatic magnetic field on the basis of the stability of the laser-plasma system. A general theoretical model of laser self-focusing in the absence of a quasistatic magnetic field (QMF) is extended to discuss self-focusing in the presence of a QMF. Various transverse intensity profiles under different axial collective electronic speeds V(z) are calculated. Numerical results indicate that for suitable laser power and plasma density, the increment in V(z) can lead to a further separation between the photon fluid and the electron fluid and hence a decrement in the energy of the laser-plasma system. This causes it to be possible for the system state without a QMF, or V(z) =0 state, to be not stable relative to some V(z) not equal 0 states.

References

Sep 15, 1989·Physical Review A: General Physics·T Kurki-SuonioT Tajima
Aug 1, 1996·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·Z M Sheng, J Meyer-ter-Vehn
Jan 22, 2002·Physical Review Letters·R J Kingham, A R Bell
Aug 23, 2002·Physical Review Letters·A KimM Lisak

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