Radiation resistance of optical materials against synchrotron radiation

Stefan Guenster; Holger Blaschke; Detlev Ristau; Alexandre Gatto; Joerg Heber; Norbert Kaiser; B. Diviacco; Marino Marsi; Mauro Trovo; Francesca Sarto; Salvatore Scaglione; Enrico Masetti

doi:10.1117/12.473160

30 May 2003 Radiation resistance of optical materials against synchrotron radiation

Stefan Guenster, Holger Blaschke, Detlev Ristau, Alexandre Gatto, Joerg Heber, Norbert Kaiser, B. Diviacco, Marino Marsi, Mauro Trovo, Francesca Sarto, Salvatore Scaglione, Enrico Masetti

Author Affiliations +

Proceedings Volume 4932, Laser-Induced Damage in Optical Materials: 2002 and 7th International Workshop on Laser Beam and Optics Characterization; (2003) https://doi.org/10.1117/12.473160
Event: XXXIV Annual Symposium on Optical Materials for High Power Lasers: Boulder Damage Symposium, 2002, Boulder, CO, United States

Abstract

Radiation resistance of optical materials against synchrotron radiation is important, if optical components for the high energetic regime have to be produced. In the framework of the European project EUFELE, which deals with the development of optical coatings for the free electron laser at ELETTRA (Trieste), a set of CaF₂ substrates was irradiated with synchrotron radiation. The synchrotron radiation was varied by wavelength, dose, and high energetic background illumination. Before and after irradiation, the CaF₂ substrates were investigated spectrophotometrically in the VUV, VIS and IR range. The surface topology was characterized by Nomarski microscope methods. Structure investigations were carried out with X-ray diffraction measurements. CaF₂ shows different types of degradation like color center formation, surface modification, and increased VUV absorption bands. Defect formation will be presented in dependence of synchrotron irradiation conditions.

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Stefan Guenster, Holger Blaschke, Detlev Ristau, Alexandre Gatto, Joerg Heber, Norbert Kaiser, B. Diviacco, Marino Marsi, Mauro Trovo, Francesca Sarto, Salvatore Scaglione, and Enrico Masetti "Radiation resistance of optical materials against synchrotron radiation", Proc. SPIE 4932, Laser-Induced Damage in Optical Materials: 2002 and 7th International Workshop on Laser Beam and Optics Characterization, (30 May 2003); https://doi.org/10.1117/12.473160

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