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
Alaimo, M., Anania, M., Artioli, M., Bacci, A., Bellaveglia, M., Ciocci, F., et al. (2014). Mapping the transverse coherence of the self amplified spontaneous emission of a freeelectron laser with the heterodyne speckle method. OPTICS EXPRESS, 22(24), 30013 [10.1364/OE.22.030013].
Mapping the transverse coherence of the self amplified spontaneous emission of a freeelectron laser with the heterodyne speckle method
CIANCHI, ALESSANDRO;
2014-11-24
Abstract
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-raysFile | Dimensione | Formato | |
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