Skip to main content Accessibility help
×
Home

Self-organization and control in stimulated Raman backscattering

  • MILOŠ M. ŠKORIĆ (a1), LJUBOMIR NIKOLIĆ (a2) and SEIJI ISHIGURO (a1)

Abstract

A stimulated Raman scattering (SRS) on electron plasma waves in underdense plasmas is of a big concern in laser fusion due to an energy loss and target preheating. Complex features of large Backward-SRS (BRS) in experiments and simulations with laser fusion targets are found. Recently, to reach ultra-high intensities at multi-exawatts and beyond, relevant to high-energy physics, Raman amplification based on BRS was proposed; still, with high sensitivity and a narrow operational window. Firstly, we revisit a standard three-coupled mode model of BRS to show that the condition for an absolute instability is readily satisfied in uniform plasmas which excites large Raman signals from a background noise. It sets in for interaction length L0 shorter than, both, the plasma length L and absorption length La. Further, we point out a generic BRS feature, which due to a nonlinear frequency shift in large electron plasma wave (relativistic/trapping effects), instead to a steady state, saturates via intermittent pulsations with incoherent spectral broadening. A ‘break up’ of Manley–Rowe invariants is shown to predict non-stationary BRS. Finally, an intermediate intensity regime is originally proposed for coherent femto-second pulse generation in a thin exploding foil plasma, with scalings investigated by theory and particle simulations.

Copyright

References

Hide All
Forslund, D. W., Kindel, J. M. and Lindman, E. L. 1975 Phys. Fluids 18, 1002.
Hinkell, D., Rosen, M. D., Williams, E. A., Langdon, A. B., Still, C. H., Callahan, D. A., Moody, J. D., Michel, P. A., Town, R. P. J., London, R. A. and Langer, S. H. 2011 Phys. Plasmas 18, 056312.
Kono, M. and Škorić, M. M. 2010 Nonlinear Physics of Plasmas. Springer-Verlag, Berlin, Ch. 12.
Kruer, W. L. 1990 Phys. Scr. T30, 5.
Mourou, G. A., Fisch, N. J., Malkin, V. M., Toroker, Z., Khazanov, E. A., Sergeev, A. M., Tajima, T. and Le Garrec, B. 2012 Optics Commun. 285, 720.
Škorić, M. M., Jovanović, M. S. and Rajković, M. R 1996 Phys. Rev. E 53, 4056; AIP Conf. Proc. 318, 380 (1994).
Škorić, M. M., Mima, K., Miyamoto, S., Maluckov, S. and Jovanović, M. S. 1997 AIP Conf. Proc. 406, 381; 1188, 15 (2009).
Trines, R. M. G. M., Fiuza, F., Bingham, R., Fonseca, R. A., Silva, L. O., Cairns, R. A. and Norreys, P. A. 2011 Nature Phys. 7, 87.
Yin, L., Albright, B. J., Rose, H. A., Montgomery, D. S., Kline, J. L., Kirkwood, R. K., Michel, P., Bowers, K. J. and Bergen, B. 2013 Phys. Plasmas 20, 012702.
MathJax
MathJax is a JavaScript display engine for mathematics. For more information see http://www.mathjax.org.

Self-organization and control in stimulated Raman backscattering

  • MILOŠ M. ŠKORIĆ (a1), LJUBOMIR NIKOLIĆ (a2) and SEIJI ISHIGURO (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed