Self-induced transparency scenario revisited via beat-wave heating induced by Doppler shift in overdense plasma layer

Ghizzo, A.; DelSarto, D.; Réveillé, T.; Besse, N.; Klein, R.
June 2007
Physics of Plasmas;Jun2007, Vol. 14 Issue 6, p062702
Academic Journal
Maxwell-fluid simulations on a flat-topped moderately overdense plasma slab (typically n0/nc=1–2) by Berezhiani et al. [Phys. Plasmas 66, 062308 (2005)] {see also the previous work of Tushentsov et al. [Phys. Rev. Lett. 87, 275002 (2001)]} were seen to lead to dynamic penetration of an ultrahigh intensity laser pulse into an overdense plasma. Two qualitatively different scenarios for the penetration of laser pulse into the overdense plasma were presented depending on the background density. In the first one, the penetration of laser energy occurs by soliton-like structures moving into the plasma. In the last one, electron cavitation occurs and the penetration is possible over a finite length only. A kinetic extension is made in this paper using Vlasov-Maxwell simulations. Vlasov simulations revealed a rich variety of new phenomena associated with the trapped particle dynamics, which cannot be described in fluid models. Most notably is the observation, during the penetration phase of the pump electromagnetic wave, of a beat-wave heating scenario induced by the Doppler shift on the reflected wave at the (moving) wave front. This beat-wave generates low-frequency acoustic-like electron modes characterized by coherent trapping-type structures in phase space leading to an efficient (nonstochastic) heating process.


Related Articles

  • Collective behavior of ion Bernstein waves in a multi-ion-species plasma. Toida, Mieko; Suzuki, Takamasa; Ohsawa, Yukiharu // Physics of Plasmas;Jun2004, Vol. 11 Issue 6, p3028 

    Collective behavior of ion Bernstein waves propagating perpendicular to an external magnetic field is studied with attention to the effect of multiple-ion species. In a thermal-equilibrium, multi-ion-species plasma, a great number of Bernstein waves are excited near the harmonics of many...

  • The electron density distribution and field profile in underdense magnetized plasma. Sadighi-Bonabi, R.; Etehadi-Abari, M. // Physics of Plasmas;Mar2010, Vol. 17 Issue 3, p032101 

    In this work propagation of a high frequency electromagnetic wave in underdense plasma in presence of an external magnetic field is investigated. When a constant magnetic field perpendicular to the motion of electrons is applied, then the electrons rotate around the magnetic field lines and...

  • Electron cyclotron resonance plasma photos. Rácz, R.; Biri, S.; Pálinkás, J. // Review of Scientific Instruments;Feb2010, Vol. 81 Issue 2, p02B708 

    In order to observe and study systematically the plasma of electron cyclotron resonance (ECR) ion sources (ECRIS) we made a high number of high-resolution visible light plasma photos and movies in the ATOMKI ECRIS Laboratory. This required building the ECR ion source into an open ECR plasma...

  • A new method for removing the blackout problem on reentry vehicles. Stenzel, R. L.; Urrutia, J. M. // Journal of Applied Physics;Mar2013, Vol. 113 Issue 10, p103303 

    Supersonic vehicles are surrounded by a plasma layer which produces a cutoff layer for electromagnetic waves. Methods to remove the layer by gas releases, dc magnetic fields, and E×B flows have been proposed earlier. The present work suggests a new approach which is based on laboratory...

  • ICR Heating in Ion Separation Systems. Timofeev, A. V. // Plasma Physics Reports; 

    A systematic procedure for analyzing the physical processes that govern ICR heating in systems for ion separation is developed. The procedure is based on an analytic model of an rf antenna generating rf fields within a plasma column in a magnetic field and includes such issues as the calculation...

  • Magnetization of plasmas. Shukla, P. K.; Eliasson, B.; Stenflo, L. // AIP Conference Proceedings;12/14/2010, Vol. 1306 Issue 1, p1 

    We critically examine and evaluate several physical mechanisms that are responsible for the seed magnetic fields in plasmas. The plasma magnetization is attributed to sources that foster motion of the background plasma electrons against the ions. The resulting space charge electric field and...

  • Characteristic Features of Electron–Ion Collisions in Strong Electric Fields. Balakin, A. A.; Mironov, V. A.; Fraıman, G. M. // Plasma Physics Reports;Jun2001, Vol. 27 Issue 6, p462 

    The classical motion of an electron in the Coulomb field of an ion and in a uniform external electric field is analyzed. A nondimensionalization method that makes it possible to study electron motion in arbitrarily strong electric fields is proposed. The possible electron trajectories in the...

  • Shock formation processes in colliding two collisionless plasmas in a magnetic field. Yamauchi, Koji; Ohsawa, Yukiharu // Physics of Plasmas;May2007, Vol. 14 Issue 5, p053110 

    Interactions of exploding and surrounding plasmas are analyzed with theory and particle simulations for the case in which the initial velocity v0 of the exploding plasma is perpendicular to the weak external magnetic field B0; because of the fast v0 and weak B0, the gyroradius v0/Ωi is much...

  • Large-scale electron vortex structure formation in a plasma lens. Chekh, Yu. N.; Goncharov, A. A.; Protsenko, I. M. // Technical Physics Letters;Jan2006, Vol. 32 Issue 1, p51 

    The first experimental data on the observation of electron vortices in an electrostatic plasma lens at a considerable radial gradient of electron density are reported. It is established that anharmonic potential waves of large amplitude appear and propagate in the azimuthal direction. The...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics