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Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident

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Effects of target heating on experiments using Kα and Kβ diagnostics.

P Palmeri¹, G Boutoux², D Batani²

¹Astrophysique et Spectroscopie, Université de Mons-UMONS, B-7000 Mons, Belgium.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|October 15, 2015

Summary

Heating and ionization significantly alter Kα and Kβ radiation emission in laser-produced plasmas. This study provides a theoretical framework for temperature diagnostics in laser-plasma interactions using copper as a test case.

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Area of Science:

Plasma Physics
Atomic Physics
Laser-Matter Interaction

Background:

Laser-matter interactions generate hot electrons, influencing target emission.
Understanding Kα and Kβ radiation is crucial for plasma diagnostics.

Purpose of the Study:

To investigate the effects of heating and ionization on Kα and Kβ emission.
To establish a theoretical background for temperature diagnostics in laser-plasma experiments.

Main Methods:

Calculated changes in emission wavelength, ionization cross section, and fluorescence yield for copper.
Modeled hot electron energy distributions (50 and 500 keV) and ionization equilibrium.

Main Results:

Quantified the impact of ionization on emission characteristics.
Demonstrated the influence of hot electron energy on spectral output.
Validated theoretical calculations against experimental data.

Conclusions:

The study provides a robust theoretical foundation for temperature diagnostics.
Findings are applicable to various laser-plasma regimes, including shock and fast ignition.
Emission characteristics are sensitive to plasma temperature and ionization state.