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Proceedings Paper

UV dielectric multilayer mirrors for free-electron lasers
Author(s): Eric Renault; Daniele Nutarelli; David Garzella; Marie-Emmanuelle Couprie; Michel Billardon
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Paper Abstract

Storage Ring Free Electron Layers (FELs) are brand new laser sources where a relativistic electron beam passing through an undulator emits synchrotron radiation at a wavelength (lambda) which is tunable according to the electron beam energy and the magnetic field intensity. An overview of the SRFELs presently operating in the UV range is presented. The easy tunable FEL operation in the whole UV range is mainly limited by the mirrors losses, which should be maintained low even in the very hostile environment generated by the broadband high power spectrum of the undulator, extending to x-rays, and which action lead to the mirrors degradation. Dedicated mirror measurements have been then developed in LURE, in the visible and in the UV range, for checking the mirrors performances before insertion in the optical cavity and after degradation. In order to insure a wide tunability range and large output power of the FEL, low total losses are crucial for FEL oscillation at shorter wavelength. New FEL sources, for instance at the ELETTRA synchrotron source, could then provide a widely tunable and powerful laser light down to 200 nm.

Paper Details

Date Published: 7 September 1999
PDF: 12 pages
Proc. SPIE 3738, Advances in Optical Interference Coatings, (7 September 1999); doi: 10.1117/12.360100
Show Author Affiliations
Eric Renault, CEA and LURE (France)
Daniele Nutarelli, CEA and LURE (France)
David Garzella, Ctr. Univ. Paris-Sud (France)
Marie-Emmanuelle Couprie, CEA and LURE (France)
Michel Billardon, LURE and ESPCI (France)

Published in SPIE Proceedings Vol. 3738:
Advances in Optical Interference Coatings
Claude Amra; H. Angus Macleod, Editor(s)

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