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Journal Articles Photonics Year : 2017

Optimization and Characterization of High-Harmonic Generation for Probing Solid Density Plasmas

Barbara Keitel
  • Function : Author
Gareth Williams
  • Function : Author
João João
  • Function : Author
Hugo Pires
  • Function : Author
Victor Hariton
  • Function : Author
Mario Galletti
  • Function : Author
Nuno Gomes
  • Function : Author
Gonçalo Figueira
  • Function : Author
João Dias
  • Function : Author
Nelson Lopes
  • Function : Author
Philippe Zeitoun
Elke Plönjes
  • Function : Author

Abstract

The creation of high energy density plasma states produced during laser-solid interaction on a sub-picosecond timescale opens a way to create astrophysical plasmas in the lab to investigate their properties, such as the frequency-dependent refractive index. Available probes to measure absorption and phase-changes given by the complex refractive index of the plasma state are extreme-UV (EUV) and soft X-ray (XUV) ultra-short pulses from high harmonic generation (HHG). For demanding imaging applications such as single-shot measurements of solid density plasmas, the HHG probe has to be optimized in photon number and characterized in intensity and wavefront stability from shot-to-shot. In an experiment, a coherent EUV source based on HHG driven by a compact diode-pumped laser is optimized in photons per pulse for argon and xenon, and the shot-to-shot intensity stability and wavefront changes are characterized. The experimental results are compared to an analytical model estimating the HHG yield, showing good agreement. The obtained values are compared to available data for solid density plasmas to confirm the feasibility of HHG as a probe.

Dates and versions

hal-01533239 , version 1 (06-06-2017)

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Jayanath Koliyadu, Swen Künzel, Thomas Wodzinski, Barbara Keitel, Joana Duarte, et al.. Optimization and Characterization of High-Harmonic Generation for Probing Solid Density Plasmas. Photonics, 2017, 4 (2), ⟨10.3390/photonics4020025⟩. ⟨hal-01533239⟩
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