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Related Experiment Videos

Radiative ablation to low-Z matter.

Jiamin Yang1, Jiatian Sheng, Yaonan Ding

  • 1National Key Laboratory of Laser Fusion, Research Center of Laser Fusion, P.O. Box 919-986, Mianyang 621900, People's Republic of China. yjm70018@my-public.sc.cninfo.net

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|October 9, 2002
PubMed
Summary

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High-power lasers generated intense X-rays, ablating plastic foils. Experiments and simulations showed non-Planckian X-ray spectra accurately predict radiative energy transport in thick foils.

Area of Science:

  • High-energy laser physics
  • X-ray generation and transport
  • Materials science under extreme conditions

Background:

  • Intense X-ray radiation is generated using high-power laser facilities like Shengguang II.
  • Understanding radiative energy transport is crucial for inertial confinement fusion and astrophysics.
  • Plastic foils are used to study X-ray interactions and material ablation.

Purpose of the Study:

  • To experimentally investigate radiative energy transport through plastic foils of varying thicknesses.
  • To determine the burn-through time of plastic foils under intense X-ray ablation.
  • To compare experimental results with simulations using different X-ray spectrum models.

Main Methods:

  • Utilizing eight beams of 0.35-microm laser with 1.0 ns pulse duration and 260 J per beam.

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  • Injecting laser beams into a cylindrical cavity to produce intense X-ray radiation.
  • Ablating plastic foils (3.0-45 microm thickness) attached to the cavity's diagnostic hole with generated X-rays.

    • Main Results:

    • Experimental data on radiative energy transport and burn-through times were obtained for plastic foils.
    • Simulations were performed using both Planckian and non-Planckian X-ray spectrum sources.
    • The simulation using a non-Planckian X-ray spectrum source showed good agreement with experimental results for thick plastic foils.

    Conclusions:

    • Non-Planckian X-ray spectrum models provide a more accurate representation of radiative energy transport in thick plastic foils.
    • Experimental validation confirms the predictive capability of non-Planckian spectral models.
    • This research contributes to a better understanding of X-ray-matter interactions in high-energy density physics.