Using X-ray spectroscopy of relativistic laser plasma interaction to reveal parametric decay instabilities: a modeling tool for astrophysics

E. Oks, E. Dalimier, A. Ya Faenov, P. Angelo, S.A. Pikuz, E. Tubman, N.M.H. Butler, R.J. Dance, T.A. Pikuz, I. Yu. Skobelev, M.A. Alkhimova, N. Booth, J. Green, C. Gregory, A. Andreev, A. Zhidkov, R. Kodama, P. McKenna, N. Woolsey

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Abstract

By analyzing profiles of experimental x-ray spectral lines of Si XIV and Al XIII, we found that both Langmuir and ion acoustic waves developed in plasmas produced via irradiation of thin Si foils by relativistic laser pulses (intensities ~10^21 W/cm^2). We prove that these waves are due to the parametric decay instability (PDI). This is the first time that the PDI-induced ion acoustic turbulence was discovered by the x-ray spectroscopy in laser-produced plasmas. These conclusions are also supported by PIC simulations. Our results can be used for laboratory modeling of physical processes in astrophysical objects and a better understanding of intense laser-plasma interactions.
Original languageEnglish
Pages (from-to)1958-1972
Number of pages15
JournalOptics Express
Volume25
Issue number3
Early online date25 Jan 2017
DOIs
Publication statusPublished - 6 Feb 2017

Keywords

  • x-ray spectral lines
  • femtosecond phenomena
  • spectroscopy
  • x-ray
  • plasmas
  • line shapes and shifts
  • parametric decay instability
  • ion acoustic turbulence
  • astrophysics

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