Mapping the transverse coherence of the self amplified spontaneous emission of a free-electron laser with the heterodyne speckle method

Matteo D. Alaimo, Maria Pia Anania, Marcello Artioli, Alberto Bacci, Marco Bellaveglia, Franco Ciocci, Enrica Chiadroni, Alessandro Cianchi, Giuseppe Dattoli, Giampierro Di Pirro, Massimo Ferrario, Giancarlo Gatti, Luca Giannessi, Michele Manfredda, Roberta Martucci, Andrea Mostacci, Bruno Paroli, Alberto Petralia, Vittoria Petrillo, Riccardo PompiliMarco A.C. Potenza, Marcello Quattormini, Julietta Rau, Daniele Redoglio, Andrea R. Rossi, Luca Serafini, Vincenzo Surrenti, Amalia Torre, Cristina Vaccarezza, Fabio Villa

Research output: Contribution to journalArticle

13 Citations (Scopus)


The two-dimensional single shot transverse coherence of the Self-Amplified Spontaneous Emission of the SPARC-LAB Free-Electron Laser was measured through the statistical analysis of a speckle field produced by heterodyning the radiation beam with a huge number of reference waves, scattered by a suspension of particles. In this paper we report the measurements and the evaluation of the transverse coherence along the SPARC-LAB undulator modules. The measure method was demonstrated to be precise and robust, it does not require any a priori assumptions and can be implemented over a wide range of wavelengths, from the optical radiation to the x-rays.
Original languageEnglish
Pages (from-to)30013 - 30023
Number of pages11
JournalOptics Express
Issue number24
Publication statusPublished - 1 Dec 2014
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this