TITLE

Backward Raman compression of x-rays in metals and warm dense matters

AUTHOR(S)
Son, S.; Ku, S.; Moon, Sung Joon
PUB. DATE
November 2010
SOURCE
Physics of Plasmas;Nov2010, Vol. 17 Issue 11, p114506
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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.
ACCESSION #
55509422

 

Related Articles

  • Low frequency structural dynamics of warm dense matter. Gregori, G.; Gericke, D. O. // Physics of Plasmas;May2009, Vol. 16 Issue 5, p056306 

    Measurements of the microscopic response of warm dense matter have been demonstrated by multi-keV inelastic x-ray scattering using laser-based sources. These techniques have been used to study the high frequency electron correlations (plasmons) in low to mid-Z plasmas. The advent of fourth...

  • Study of x-ray emission from a table top plasma focus and its application as an x-ray backlighter. Beg, F. N.; Ross, I.; Lorenz, A.; Worley, J. F.; Dangor, A. E.; Haines, M. G. // Journal of Applied Physics;9/15/2000, Vol. 88 Issue 6, p3225 

    Studies a two kJ, 200 kA, table top plasma focus device as an intense x-ray source. Measurement of the x-ray yield from gases as a function of filling pressure and in neon as a function of anode length; Temperature estimated from spectroscopic observations.

  • Performance summary on a high power dense plasma focus x-ray lithography point source producing 70 nm line features in AlGaAs microcircuits. Petr, Rodney; Bykanov, Alexander; Freshman, Jay; Reilly, Dennis; Mangano, Joseph; Roche, Maureen; Dickenson, Jason; Burte, Mitchell; Heaton, John // Review of Scientific Instruments;Aug2004, Vol. 75 Issue 8, p2551 

    A high average power dense plasma focus (DPF), x-ray point source has been used to produce ∼70 nm line features in AlGaAs-based monolithic millimeter-wave integrated circuits (MMICs). The DPF source has produced up to 12 J per pulse of x-ray energy into 4π steradians at ∼1 keV...

  • Pulsed soft x-ray source for laser-plasma diagnostic calibrations. Bourgade, J. L.; Cavailler, C.; de Mascureau, J.; Miquel, J. L. // Review of Scientific Instruments;Aug1986, Vol. 57 Issue 8, p2165 

    Improvement in laser-plasma analysis makes it necessary to perform accurate calibration in the soft x-ray range. For this purpose we have modified a plasma focus device (27 kJ, 40 kV, and 400 kA) in order to enhance its soft x-ray emission: A hollow anode is used to prevent hard x-ray...

  • Suppression of Landau damping via electron band gap. Son, S.; Ku, S. // Physics of Plasmas;Jan2010, Vol. 17 Issue 1, p010703 

    The pondermotive potential in the x-ray Raman compression can generate an electron band gap, which suppresses the Landau damping. The regime is identified where a Langmuir wave can be driven without damping in the stimulated Raman compression. It is shown that the partial wave breaking and the...

  • Theory of plasmon decay in dense plasmas and warm dense matters. Son, S.; Ku, S.; Moon, Sung Joon // Physics of Plasmas;Nov2010, Vol. 17 Issue 11, p112709 

    The prevalent Landau damping theory for classical plasmas does not fully explain the Langmuir wave decay in dense plasmas. A dielectric function theory adapted from the condensed matter physics is extended to be applicable for the dense plasmas and warm dense matters. This theory, accounting for...

  • Erratum: ‘‘Narrow Raman spectra: The competition between collisional and Landau damping’’ [Phys. Fluids B 1, 2217 (1989)]. Drake, R. P.; Williams, E. A.; Young, P. E.; Estabrook, Kent; Kruer, W. L.; Montgomery, D. S.; Baldis, H. A.; Johnston, T. W. // Physics of Fluids B: Plasma Physics;Jul90, Vol. 2 Issue 7, p1709 

    Presents a correction to the article titled 'Narrow Raman spectra: The competition between collisional and Landau damping,' published in a 1989 issue of 'Physics of Fluids.'

  • Decays of electron Bernstein waves near plasma edge. Xiang, Nong; Cary, John R. // Physics of Plasmas;Dec2011, Vol. 18 Issue 12, p122107 

    Nonlinear wave-wave couplings near the upper hybrid resonance are studied via particle-in-cell simulations. It is found that the decay of an electron Bernstein wave (EBW) depends on the ratio of the incident frequency and electron cyclotron frequency. For ratios less than two, parametric decay...

  • Stimulated Raman scattering coupled to decay instability in a plasma channel. Singh, Ranjeet; Tripathi, V. K. // Physics of Plasmas;Jan2012, Vol. 19 Issue 1, p012109 

    A non local theory of Stimulated Raman scattering (SRS) coupled to decay instability in a plasma channel is developed. The primary Langmuir wave, produced in the Raman backscattering process, decays into a secondary Langmuir wave of longer wavelength and an ion acoustic wave. This diversion of...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

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

Try another library?
Sign out of this library

Other Topics