“Bloch wave” modification of stimulated Raman by stimulated Brillouin scattering

Dodd, E. S.; Vu, H. X.; DuBois, D. F.; Bezzerides, B.

doi:10.1063/1.4796044

“Bloch wave” modification of stimulated Raman by stimulated Brillouin scattering

Journal Article · Thu Mar 21 00:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4796044· OSTI ID:1114980

Dodd, E. S.; Vu, H. X.; DuBois, D. F.; Bezzerides, B.

Using the reduced-description particle-in-cell (RPIC) method, we study the coupling of backward stimulated Raman scattering (BSRS) and backward stimulated Brillouin scattering (BSBS) in regimes where the reflectivity involves the nonlinear behavior of particles trapped in the daughter plasma waves. The temporal envelope of a Langmuir wave (LW) obeys a Schrödinger equation where the potential is the periodic electron density fluctuation resulting from an ion-acoustic wave (IAW). The BSRS-driven LWs in this case have a Bloch wave structure and a modified dispersion due to the BSBS-driven spatially periodic IAW, which includes frequency band gaps at kLW∼kIAW/2∼k0 (kLW, kIAW, and k0 are the wave number of the LW, IAW, and incident pump electromagnetic wave, respectively). This band structure and the associated Bloch wave harmonic components are distinctly observed in RPIC calculations of the electron density fluctuation spectra and this structure may be observable in Thomson scatter. Bloch wave components grow up in the LW spectrum, and are not the result of isolated BSRS. Self-Thomson scattered light from these Bloch wave components can have forward scattering components. The distortion of the LW dispersion curve implies that the usual relationship connecting the frequency shift of the BSRS-scattered light and the density of origin of this light may become inaccurate. The modified LW frequency results in a time-dependent frequency shift that increases as the IAW grows, detunes the BSRS frequency matching condition, and reduces BSRS growth. A dependence of the BSRS reflectivity on the IAW Landau damping results because this damping determines the levels of IAWs. The time-dependent reflectivity in our simulations is characterized by bursts of sub-picosecond pulses of BSRS alternating with multi-ps pulses of BSBS, and BSRS is observed to decline precipitously as soon as SBS begins to grow from low levels. In strong BSBS regimes, the Bloch wave effects in BSRS are strong and temporal anti-correlation with BSRS is due to pump depletion in addition to frequency detuning. In most cases studied, BSBS suppressed the time-averaged reflectivity of BSRS compared to the levels obtained with fixed ions (and therefore no BSBS). The strong spatial modulation of the Bloch Langmuir waves appears to weaken electron trapping and thereby lowers the inflated reflectivity levels of BSRS.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1114980

Alternate ID(s):: OSTI ID: 22107699

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 3 Vol. 20; ISSN 1070-664X

Publisher:: American Institute of PhysicsCopyright Statement

Country of Publication:: United States

Language:: English

References (23)

ASPEN: A Fully Kinetic, Reduced-Description Particle-in-Cell Model for Simulating Parametric Instabilities Vu, H. X.; Bezzerides, B.; DuBois, D. F. Journal of Computational Physics, Vol. 156, Issue 1 https://doi.org/10.1006/jcph.1999.6350	journal	November 1999
Recent Trident single hot spot experiments: Evidence for kinetic effects, and observation of Langmuir decay instability cascade Montgomery, D. S.; Cobble, J. A.; Fernández, J. C. Physics of Plasmas, Vol. 9, Issue 5 https://doi.org/10.1063/1.1468857	journal	May 2002
Kinetic inflation of stimulated Raman backscatter in regimes of high linear Landau damping Vu, H. X.; DuBois, D. F.; Bezzerides, B. Physics of Plasmas, Vol. 9, Issue 5 https://doi.org/10.1063/1.1471235	journal	May 2002
Quasiresonant mode coupling of electron plasma waves Kaw, P. K.; Lin, A. T.; Dawson, J. M. The Physics of Fluids, Vol. 16, Issue 11 https://doi.org/10.1063/1.1694242	journal	November 1973
Inflation threshold: A nonlinear trapping-induced threshold for the rapid onset of stimulated Raman scattering from a single laser speckle Vu, H. X.; DuBois, D. F.; Bezzerides, B. Physics of Plasmas, Vol. 14, Issue 1 https://doi.org/10.1063/1.2426918	journal	January 2007
Hot-electron production and suprathermal heat flux scaling with laser intensity from the two-plasmon–decay instability Vu, H. X.; DuBois, D. F.; Myatt, J. F. Physics of Plasmas, Vol. 19, Issue 10 https://doi.org/10.1063/1.4757978	journal	October 2012
Nonlinear features of stimulated Brillouin and Raman scattering Estabrook, Kent; Kruer, W. L.; Haines, M. G. Physics of Fluids B: Plasma Physics, Vol. 1, Issue 6 https://doi.org/10.1063/1.858952	journal	June 1989
The coupling of stimulated Raman and Brillouin scattering in a plasma Umstadter, D.; Mori, W. B.; Joshi, C. Physics of Fluids B: Plasma Physics, Vol. 1, Issue 1 https://doi.org/10.1063/1.859085	journal	January 1989
Nonlinear Raman scattering behavior with Langmuir and sound waves coupling in a homogeneous plasma Bonnaud, Guy; Pesme, Denis; Pellat, René Physics of Fluids B: Plasma Physics, Vol. 2, Issue 7 https://doi.org/10.1063/1.859487	journal	July 1990
Backscattered spectra for stimulated Raman scattering in an inhomogeneous plasma Bonnaud, Guy; Pesme, Denis; Pellat, René Physics of Fluids B: Plasma Physics, Vol. 4, Issue 2 https://doi.org/10.1063/1.860293	journal	February 1992
Raman scattering in a nearly resonant density ripple Barr, Hugh C.; Chen, Francis F. The Physics of Fluids, Vol. 30, Issue 4 https://doi.org/10.1063/1.866318	journal	April 1987
Nonlinear development of stimulated Raman scattering from electrostatic modes excited by self-consistent non-Maxwellian velocity distributions Yin, L.; Daughton, W.; Albright, B. J. Physical Review E, Vol. 73, Issue 2 https://doi.org/10.1103/PhysRevE.73.025401	journal	February 2006
Electron Plasma-Wave Production by Stimulated Raman Scattering: Competition with Stimulated Brillouin Scattering Walsh, C. J.; Villeneuve, D. M.; Baldis, H. A. Physical Review Letters, Vol. 53, Issue 15 https://doi.org/10.1103/PhysRevLett.53.1445	journal	October 1984
Nonlinear coupling of stimulated Raman and Brillouin scattering in laser-plasma interactions Rose, Harvey A.; DuBois, D. F.; Bezzerides, B. Physical Review Letters, Vol. 58, Issue 24 https://doi.org/10.1103/PhysRevLett.58.2547	journal	June 1987
Suppression of stimulated Raman scattering by the seeding of stimulated Brillouin scattering in a laser-produced plasma Villeneuve, D. M.; Baldis, H. A.; Bernard, J. E. Physical Review Letters, Vol. 59, Issue 14 https://doi.org/10.1103/PhysRevLett.59.1585	journal	October 1987
Competition between the stimulated Raman and Brillouin scattering instabilities in 0.35- μ m irradiated CH foil targets Baldis, H. A.; Young, P. E.; Drake, R. P. Physical Review Letters, Vol. 62, Issue 24 https://doi.org/10.1103/PhysRevLett.62.2829	journal	June 1989
Observed Dependence of Stimulated Raman Scattering on Ion-Acoustic Damping in Hohlraum Plasmas Fernández, Juan C.; Cobble, J. A.; Failor, Bruce H. Physical Review Letters, Vol. 77, Issue 13 https://doi.org/10.1103/PhysRevLett.77.2702	journal	September 1996
Effect of Ion-Wave Damping on Stimulated Raman Scattering in High- Z Laser-Produced Plasmas Kirkwood, R. K.; MacGowan, B. J.; Montgomery, D. S. Physical Review Letters, Vol. 77, Issue 13 https://doi.org/10.1103/PhysRevLett.77.2706	journal	September 1996
Transient Enhancement and Detuning of Laser-Driven Parametric Instabilities by Particle Trapping Vu, H. X.; DuBois, D. F.; Bezzerides, B. Physical Review Letters, Vol. 86, Issue 19 https://doi.org/10.1103/PhysRevLett.86.4306	journal	May 2001
Electron Kinetic Effects in the Nonlinear Evolution of a Driven Ion-Acoustic Wave Riconda, C.; Heron, A.; Pesme, D. Physical Review Letters, Vol. 94, Issue 5 https://doi.org/10.1103/PhysRevLett.94.055003	journal	February 2005
Observation of a Transition from Fluid to Kinetic Nonlinearities for Langmuir Waves Driven by Stimulated Raman Backscatter Kline, J. L.; Montgomery, D. S.; Bezzerides, B. Physical Review Letters, Vol. 94, Issue 17 https://doi.org/10.1103/PhysRevLett.94.175003	journal	May 2005
Nonlinear Spectral Signatures and Spatiotemporal Behavior of Stimulated Raman Scattering from Single Laser Speckles Vu, H.; Yin, L.; DuBois, D. Physical Review Letters, Vol. 95, Issue 24 https://doi.org/10.1103/PhysRevLett.95.245003	journal	December 2005
Saturation of Backward Stimulated Scattering of a Laser Beam in the Kinetic Regime Yin, L.; Albright, B. J.; Bowers, K. J. Physical Review Letters, Vol. 99, Issue 26 https://doi.org/10.1103/PhysRevLett.99.265004	journal	December 2007

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