title: Note: Nanosecond LED-based source for optical modeling of scintillators illuminated by partially coherent X-ray radiation.
abstract: We developed a broad-spectrum light source specifically designed to reproduce the temporal behavior of the optical pulses emitted by scintillators for X-ray detection. Nanosecond-to-millisecond pulses are generated through a fast circuit driving Light Emitting Diodes (LEDs) and are endowed with the peculiar time features of the most employed scintillators by means of a dedicated pulse shaping stage. We implement the light source for the optical modeling of the single-shot X-ray coherence measurements with near-field speckles generated by the scattering from colloidal suspensions (heterodyne near field speckle method). Moreover, we derive a rigorous scaling law that quantitatively relates visible and X-ray signal-to-noise ratios.
authors.affiliation: Dipartimento di Fisica, Universitá degli Studi di Milano and INFN Sezione di Milano, via G. Celoria, 16, 20133 Milano, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Siano
authors.affiliation: Dipartimento di Fisica, Universitá degli Studi di Milano and INFN Sezione di Milano, via G. Celoria, 16, 20133 Milano, Italy.
authors.forename: B
authors.initials: B
authors.lastname: Paroli
authors.affiliation: INFN-LNF, via E. Fermi, 00044 Frascati, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Chiadroni
authors.affiliation: INFN-LNF, via E. Fermi, 00044 Frascati, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Ferrario
authors.affiliation: Dipartimento di Fisica, Universitá degli Studi di Milano and INFN Sezione di Milano, via G. Celoria, 16, 20133 Milano, Italy.
authors.forename: M A C
authors.initials: MA
authors.lastname: Potenza