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Optimization of soft x-ray amplifiers by tailoring plasma hydrodynamic

  • E. Oliva
  • Ph. Zeitoun
  • P. Velarde
  • M. Fajardo
  • K. Cassou
  • D. Ros
  • D. Portillo
  • S. Sebban
Part of the Springer Proceedings in Physics book series (SPPHY, volume 136)

Abstract

Plasma-based soft x-ray lasers have the potentiality to generate high-energy, highly coherent, short pulse beam. Thanks to their high density, plasmas created by interaction of intense laser with solid target should store the highest amount of energy among every plasma amplifiers. However, to date output energy from solid amplifiers remains as low as 60 nJ [1]. For 30 µm micrometer focal line width, we demonstrated with the 2D hydrodynamic code with radiation transport in AMR ARWEN [2] that deleterious hydrodynamic effects, as the lateral expansion and thermal conduction, reduce the amplification surface and the gain coefficient. Thus, carefully tailoring the plasma shape is crucial for extracting energy stored in the plasma. With 1 mm wide plasma, energy as high as 20 µJ in sub-ps pulse is achievable [3]. With such tailored plasma, pumping efficiency has been increased by nearly a factor of 10 as compared to former plasma amplifiers.

Keywords

Lateral Expansion Gain Coefficient Radiation Transport Small Signal Gain Gain Region 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Wang, Y. et al : ‘Phase coherent, injection-seeded, table-top soft-X-ray lasers at 18.9 nm and 13.9 nm’, Nature Photonics, 2, 2008Google Scholar
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    Ogando, F. and Velarde, P. : ‘Development of a radiation transport fluid dynamic code under AMR scheme’, J. Quant. Spectrosc. Radiat. Transf, 71, 2001Google Scholar
  3. 3.
    Oliva, E. et al: ‘Optimization of soft x-ray amplifier by tailoring plasma hydrodynamics’ Opt. Lett., 34 (17), 2640-2642, 2009Google Scholar
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    Zeitoun, Ph. et al: ‘A high intensity highly coherent soft x-ray femtosecond laser seeded by a high harmonic beam’, Nature, 431, 2004Google Scholar
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    Cassou, K. et al: ‘Transverse spatial improvement of a transiently pumped soft x-ray amplifier’, Phys. Rev. A, 74, 2006Google Scholar

Copyright information

© Canopus Academic Publishing Limited 2011

Authors and Affiliations

  • E. Oliva
    • 1
    • 2
  • Ph. Zeitoun
    • 2
  • P. Velarde
    • 1
  • M. Fajardo
    • 3
  • K. Cassou
    • 4
  • D. Ros
    • 4
  • D. Portillo
    • 1
  • S. Sebban
    • 2
  1. 1.Instituto de Fusión NuclearUniversidad Politécnica de MadridMadridSpain
  2. 2.Laboratoire d’Optique ApliquéeENSTA ParisTech, École Polytechnique, CNRSPalaiseauFrance
  3. 3.Instituto de Plasmas e Fusão NuclearInstituto Superior TécnicoLisbonPortugal
  4. 4.Laboratoire de Physique des Gaz et des Plasmas, CNRSUniversité Paris Sud XIOrsayFrance

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