Quasitransient backward Raman amplification of powerful laser pulses in dense plasmas with multicharged ions

doi:https://doi.org/10.1063/1.3460347

Title: Quasitransient backward Raman amplification of powerful laser pulses in dense plasmas with multicharged ions

Full Record
Other Related Research

Abstract

The range of plasma parameters, where the efficient quasitransient backward Raman amplification (QBRA) of powerful laser pulses is possible, is determined for dense plasmas with multicharged ions. Approximate scalings that portray in a simple way the efficient QBRA range in multidimensional parameter space are found. The calculation, applicable to infrared, ultraviolet, soft x-ray, and x-ray laser pulses, takes into account plasma heating by the lasers. It is shown that efficient QBRA can survive even the nonsaturated linear Landau damping of the Langmuir wave mediating the energy transfer from the pump to the seed laser pulse; moreover, this survival does not require very intense seed laser pulses.

Authors:

Malkin, V M; Fisch, N J ^[1]

Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08544 (United States)

Publication Date:: 2010-07-15

OSTI Identifier:: 21389138

Resource Type:: Journal Article

Journal Name:: Physics of Plasmas

Additional Journal Information:: Journal Volume: 17; Journal Issue: 7; Other Information: DOI: 10.1063/1.3460347; (c) 2010 American Institute of Physics; Journal ID: ISSN 1070-664X

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMPLIFICATION; ENERGY TRANSFER; LANDAU DAMPING; MULTICHARGED IONS; PLASMA; PLASMA HEATING; PULSES; SOFT X RADIATION; ULTRAVIOLET RADIATION; X-RAY LASERS; CHARGED PARTICLES; DAMPING; ELECTROMAGNETIC RADIATION; HEATING; IONIZING RADIATIONS; IONS; LASERS; RADIATIONS; X RADIATION

Citation Formats


                    Malkin, V M, and Fisch, N J. Quasitransient backward Raman amplification of powerful laser pulses in dense plasmas with multicharged ions.  United States: N. p., 2010. 
        Web.  doi:10.1063/1.3460347.

Copy to clipboard


                    Malkin, V M, & Fisch, N J. Quasitransient backward Raman amplification of powerful laser pulses in dense plasmas with multicharged ions.  United States.  https://doi.org/10.1063/1.3460347

Copy to clipboard


                    Malkin, V M, and Fisch, N J. Thu .  
        "Quasitransient backward Raman amplification of powerful laser pulses in dense plasmas with multicharged ions".  United States.  https://doi.org/10.1063/1.3460347.

Copy to clipboard


                    
@article{osti_21389138,

  title        = {Quasitransient backward Raman amplification of powerful laser pulses in dense plasmas with multicharged ions},

  author       = {Malkin, V M and Fisch, N J},

  abstractNote = {The range of plasma parameters, where the efficient quasitransient backward Raman amplification (QBRA) of powerful laser pulses is possible, is determined for dense plasmas with multicharged ions. Approximate scalings that portray in a simple way the efficient QBRA range in multidimensional parameter space are found. The calculation, applicable to infrared, ultraviolet, soft x-ray, and x-ray laser pulses, takes into account plasma heating by the lasers. It is shown that efficient QBRA can survive even the nonsaturated linear Landau damping of the Langmuir wave mediating the energy transfer from the pump to the seed laser pulse; moreover, this survival does not require very intense seed laser pulses.},

  doi          = {10.1063/1.3460347},

  url          = {https://www.osti.gov/biblio/21389138},
  journal      = {Physics of Plasmas},

  issn         = {1070-664X},

  number       = 7,

  volume       = 17,

  place        = {United States},

  year         = {2010},

  month        = {7}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1063/1.3460347

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Numerical modeling of quasitransient backward Raman amplification of laser pulses in moderately undercritical plasmas with multicharged ions

Journal Article Balakin, A A ; Fraiman, G M ; Fisch, N J ; ... - Physics of Plasmas

It was proposed recently that powerful optical laser pulses could be efficiently compressed through backward Raman amplification in ionized low density solids, in spite of strong damping of the resonant Langmuir wave. It was argued that, even for nonsaturated Landau damping of the Langmuir wave, the energy transfer from the pump laser pulse to the amplified seed laser pulse can nevertheless be highly efficient. This work numerically examines such regimes of strong damping, called quasitransient regimes, within the simplest model that takes into account the major effects. The simulations indicate that compression of powerful optical laser pulses in ionized lowmore »« less
https://doi.org/10.1063/1.3650074
Quasitransient regimes of backward Raman amplification of intense x-ray pulses

Journal Article Malkin, V M ; Fisch, N J - Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)

New powerful soft x-ray sources may be able to access intensities needed for backward Raman amplification (BRA) of x-ray pulses in plasmas. However, high plasma densities, needed to provide enough coupling between the pump and seed x-ray pulses, cause strong damping of the Langmuir wave that mediates energy transfer from the pump to the seed pulse. Such damping could reduce the coupling, thus making efficient BRA impossible. This work shows that efficient BRA can survive despite the Langmuir wave damping significantly exceeding the linear BRA growth rate. Moreover, the strong Langmuir wave damping can automatically suppress deleterious instabilities of BRAmore »« less
https://doi.org/10.1103/PHYSREVE.80.046409
Inverse Bremsstrahlung Stabilization of Noise in the Generation of Ultra-short Intense Pulses by Backward Raman Amplification

Technical Report Berger, Richard L ; Clark Andrei Solodov, Daniel S ; Valeo, Ernest J ; ...

Inverse bremsstrahlung absorption of the pump laser beam in a backward Raman amplifier over the round-trip light transit time through the sub-critical density plasma can more than double the electron temperature of the plasma and produce time-varying axial temperature gradients. The resulting increased Landau damping of the plasma wave and detuning of the resonance can act to stabilize the pump against unwanted amplification of Langmuir noise without disrupting nonlinear amplification of the femtosecond seed pulse. Because the heating rate increases with the charge state Z, only low-Z plasmas (hydrogen, helium, or helium-hydrogen mixtures) will maintain a low enough temperature formore » efficient operation.« less
https://doi.org/10.2172/820122

Full Text Available
Inverse Bremsstrahlung Stabilization of Noise in the Generation of Ultra-short Intense Pulses by Backward Raman Amplification

Journal Article Berger, R L ; Clark, D S ; Solodov, A ; ... - Published in: Physics of Plasmas, vol. 11, no. 5, May 1, 2004, pp. 1931

Inverse bremsstrahlung absorption of the pump laser beam in a backward Raman amplifier over the round-trip light transit time through the sub-critical density plasma can more than double the electron temperature of the plasma and produce time-varying axial temperature gradients. The resulting increased Landau damping of the plasma wave and detuning of the resonance can act to stabilize the pump against unwanted amplification of Langmuir noise without disrupting nonlinear amplification of the femtosecond seed pulse. Because the heating rate increases with the charge state Z, only low-Z plasmas (hydrogen, helium, or helium-hydrogen mixtures) will maintain a low enough temperature formore » efficient operation.« less
Full Text Available
Backward Raman compression of x-rays in metals and warm dense matters

Journal Article Son, S ; Ku, S ; Moon, Sung Joon - Physics of Plasmas

Experimentally observed decay rate of the long wavelength Langmuir wave in metals and dense plasmas is orders of magnitude larger than the prediction of the prevalent Landau damping theory. The discrepancy is explored, and the existence of a regime where the forward Raman scattering is stable and the backward Raman scattering is unstable is examined. The amplification of a x-ray pulse in this regime, via the backward Raman compression, is computationally demonstrated, and the optimal pulse duration and intensity is estimated.
https://doi.org/10.1063/1.3492714

Similar Records