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Multiscale degradations of storage ring FEL optics

: Gatto, A.; Feigl, T.; Kaiser, N.; Garzella, D.; Ninno, G. de; Couprie, M.E.; Marsi, M.; Trovo, M.; Walker, R.; Grewe, M.; Wille, K.; Paoloni, S.; Reita, V.; Roger, J.P.; Boccara, C; Torchio, P.; Albrand, G.; Amra, C.


Nuclear instruments and methods in physics research, Section A. Accelerators, spectrometers, detectors and associated equipment 483 (2002), No.1-2, pp.172-176
ISSN: 0167-5087
ISSN: 0168-9002
Journal Article
Fraunhofer IOF ()
multiscale degradation; storage ring FEL optic; robust optic; harsh synchrotron radiation condition; multiscale wavelength damage; local crystalline structure modification; high optical index material; surface roughness; laser source; oxide mirror

The advanced understanding of the complete degradation phenomena is crucial in order to develop robust optics for FEL. Under very harsh Synchrotron Radiation conditions, results show that multiscale wavelength damages could be observed, inducing local crystalline structure modifications of the high optical index material with a severe increase of the surface roughness.