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Related Experiment Video

Updated: Jul 6, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

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Published on: July 12, 2017

Self-induced harmonic generation in a storage-ring free-electron laser.

G De Ninno¹, E Allaria, M Coreno

¹University of Nova Gorica, Slovenia.

Physical Review Letters

|March 21, 2008

Summary

This study shows storage-ring free-electron lasers can generate harmonic radiation down to 36.5 nm. This offers a new path for advanced light sources, overcoming current laser and synchrotron limitations.

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Last Updated: Jul 6, 2026

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Area of Science:

* Physics
* Optics
* Accelerator Science

Background:

* Conventional lasers and synchrotron radiation face limitations in light source capabilities.
* Relativistic electron beams offer a promising alternative for generating coherent radiation.
* Free-electron lasers (FELs) are a key technology in this area.

Purpose of the Study:

* To demonstrate harmonic generation using a storage-ring free-electron laser (SR-FEL).
* To achieve short-wavelength radiation (down to 36.5 nm) with SR-FELs.
* To provide a theoretical interpretation of the underlying physical processes.

Main Methods:

* Experimental demonstration of harmonic generation in a storage-ring FEL.
* Theoretical analysis of the electron beam-photon interaction within the undulator.
* Utilizing a linac-based electron beam and laser pulse interaction.

Main Results:

* Successful harmonic generation achieved, reaching wavelengths as short as 36.5 nm.
* Experimental validation of SR-FELs for short-wavelength coherent radiation.
* Detailed interpretation of the physical mechanisms driving harmonic generation.

Conclusions:

* Storage-ring free-electron lasers are capable of significant harmonic generation.
* This technology presents a viable alternative to overcome limitations of existing light sources.
* The findings pave the way for new applications in various scientific fields.