Absolute energy distribution of hard X-rays poduced in the interaction of a kHz femtosecond laser with tantalum targets
FOURMENT, C.
Centre d'Etudes Lasers Intenses et Applications [CELIA]
Laboratoire d'Études Aérodynamiques [LEA]
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Centre d'Etudes Lasers Intenses et Applications [CELIA]
Laboratoire d'Études Aérodynamiques [LEA]
Idioma
en
Article de revue
Este ítem está publicado en
Review of Scientific Instruments. 2006, vol. 77, n° 9, p. 093302
American Institute of Physics
Resumen en inglés
Previous reports have indicated the anomalous excitation rate for the 6.2 keV nuclear level of 181Ta in a plasma produced with a femtosecond laser. A detailed characterization of the electrons and x-ray sources produced ...Leer más >
Previous reports have indicated the anomalous excitation rate for the 6.2 keV nuclear level of 181Ta in a plasma produced with a femtosecond laser. A detailed characterization of the electrons and x-ray sources produced in such a plasma is required to interpret these results. In a preliminary work, the continuous energy distribution of hard x rays 10–500 keV produced in the interaction of a kilohertz femtosecond laser beam with a tantalum solid target is investigated in the 31015–6 1016 W/cm2 range of intensity. A sodium iodide detector with appropriate shielding is used. Strong collimation and absorption filters are used to avoid the pileup of photons in the detector. The response function of this setup is calculated with the GEANT3 simulation code. We demonstrate the necessity to quantify the Compton scattered events in the raw spectra in order to restore the absolute x-ray energy distribution.< Leer menos
Palabras clave en inglés
tantalum
plasma X-ray sources
plasma production by laser
high-speed optical techniques
plasma diagnostics
plasma light propagation
plasma simulation
Compton effect
Orígen
Importado de HalCentros de investigación