Spatially resolved analysis of Kα x-ray emission from plasmas induced by a femtosecond weakly relativistic laser pulse at various polarizations
| Autor: | Cristoforetti, G (Cristoforetti, G.)[ 1 ], Anania, MP (Anania, M. P.)[ 1 ], Faenov, AY (Faenov, A. Ya.)[ 2,3 ], Giulietti, A (Giulietti, A.)[ 1 ], Giulietti, D (Giulietti, D.)[ 4,5 ], Hansen, SB (Hansen, S. B.)[ 6 ], Koester, P (Koester, P.)[ 1 ], Labate, L (Labate, L.)[ 1,5 ], Levato, T (Levato, T.)[ 1,7,8 ], Pikuz, TA (Pikuz, T. A.)[ 2,3 ], Gizzi, LA (Gizzi, L. A.)[ 1,5 ] |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Physical review. E, Statistical, nonlinear, and soft matter physics 87 (2013): 023103. doi:10.1103/PhysRevE.87.023103 info:cnr-pdr/source/autori:Cristoforetti, G (Cristoforetti, G.)[ 1 ] ; Anania, MP (Anania, M. P.)[ 1 ] ; Faenov, AY (Faenov, A. Ya.)[ 2,3 ] ; Giulietti, A (Giulietti, A.)[ 1 ] ; Giulietti, D (Giulietti, D.)[ 4,5 ] ; Hansen, SB (Hansen, S. B.)[ 6 ] ; Koester, P (Koester, P.)[ 1 ] ; Labate, L (Labate, L.)[ 1,5 ] ; Levato, T (Levato, T.)[ 1,7,8 ] ; Pikuz, TA (Pikuz, T. A.)[ 2,3 ] ; Gizzi, LA (Gizzi, L. A.)[ 1,5 ]/titolo:Spatially resolved analysis of Kα x-ray emission from plasmas induced by a femtosecond weakly relativistic laser pulse at various polarizations/doi:10.1103%2FPhysRevE.87.023103/rivista:Physical review. E, Statistical, nonlinear, and soft matter physics (Print)/anno:2013/pagina_da:023103/pagina_a:/intervallo_pagine:023103/volume:87 |
| DOI: | 10.1103/PhysRevE.87.023103 |
| Popis: | Spatially resolved K-shell spectroscopy is used here to investigate the interaction of an ultrashort laser pulse (lambda = 800 nm, tau = 40 fs) with a Ti foil under intense irradiation (I lambda(2) = 2 x 10(18) W mu m(2) cm(-2)) and the following fast electron generation and transport into the target. The effect of laser pulse polarization (p, s, and circular) on the K alpha yield and line shape is probed. The radial structure of intensity and width of the lines, obtained by a discretized Abel deconvolution algorithm, suggests an annular distribution of both the hot electron propagation into the target and the target temperature. An accurate modeling of K alpha line shapes was performed, revealing temperature gradients, going from a few eV up to 15-20 eV, depending on the pulse polarization. Results are discussed in terms of mechanisms of hot electron generation and of their transport through the preplasma in front of the target. |
| Databáze: | OpenAIRE |
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