Experimental characterization of nonlinear harmonic generation in planar and helical undulators

E. Allaria, F. Curbis, M. Coreno, M. Danailov, B. Diviacco, C. Spezzani, M. Trovó, G. Deninno

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25 Citations (SciVal)

Abstract

We present an experimental characterization of the process of coherent harmonic generation in single-pass free electron lasers. The harmonic radiation is obtained by seeding the electron beam stored in the Elettra storage ring with a Ti:sapphire laser. Different methods for generating harmonics are compared between them, and a detailed characterization of the emitted light is performed for different polarizations. Our results also contribute to the debate about the possible presence of a coherent on-axis signal in helical undulators. In this respect, we provide an experimental confirmation of recent theoretical studies that predict no coherent on-axis signal.

Original languageEnglish
Article number174801
JournalPhysical Review Letters
Volume100
Issue number17
DOIs
Publication statusPublished - 2008 Apr 30
Externally publishedYes

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