We exploit the speckle field generated by scattering from a colloidal suspension to access both spatial and temporal coherence properties of broadband radiation. By applying the Wiener-Khinchine theorem to the retrieved temporal coherence function, information about the emission spectrum of the source is obtained in good agreement with the results of a grating spectrometer. Experiments have been performed with visible light. We prove more generally that our approach can be considered as a tool for modeling a variety of cases. Here we discuss how to apply such diagnostics to broad-spectrum betatron radiation produced in the laser-driven wakefield accelerator under development at SPARC LAB facility in Frascati.
Measurement of power spectral density of broad-spectrum visible light with heterodyne near field scattering and its scalability to betatron radiation / M. Siano, B. Paroli, E. Chiadroni, M. Ferrario, M.A.C. Potenza. - In: OPTICS EXPRESS. - ISSN 1094-4087. - 23:26(2015), pp. 32888-32896. [10.1364/OE.23.032888]
Measurement of power spectral density of broad-spectrum visible light with heterodyne near field scattering and its scalability to betatron radiation
M. SianoPrimo
;B. ParoliSecondo
;M.A.C. PotenzaUltimo
2015
Abstract
We exploit the speckle field generated by scattering from a colloidal suspension to access both spatial and temporal coherence properties of broadband radiation. By applying the Wiener-Khinchine theorem to the retrieved temporal coherence function, information about the emission spectrum of the source is obtained in good agreement with the results of a grating spectrometer. Experiments have been performed with visible light. We prove more generally that our approach can be considered as a tool for modeling a variety of cases. Here we discuss how to apply such diagnostics to broad-spectrum betatron radiation produced in the laser-driven wakefield accelerator under development at SPARC LAB facility in Frascati.File | Dimensione | Formato | |
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