Saturation of a Ce: Y3Al5O12 scintillator response to ultra-short pulses of extreme ultraviolet soft X-ray and X-ray laser radiation

0503381 - ÚFP 2019 RIV US eng J - Journal Article
Krzywinski, J. - Andrejczuk, A. - Bionta, R. M. - Burian, T. - Chalupský, J. - Jurek, M. - Kirm, M. - Nagirnyi, V. - Sobierajski, R. - Tiedtke, K. - Vielhauer, S. - Juha, Libor
Saturation of a Ce: Y3Al5O12 scintillator response to ultra-short pulses of extreme ultraviolet soft X-ray and X-ray laser radiation.
Optical Materials Express. Roč. 7, č. 3 (2017), s. 665-675. ISSN 2159-3930
R&D Projects: GA ČR(CZ) GA14-29772S; GA MŠMT LG15013
Institutional support: RVO:61389021
Keywords : fluorescent and luminescent materials * luminescence * free-electron lasers (FELs) * UV * EUV * X-ray lasers * laser beam characterization * radiometer
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 2.566, year: 2017
https://www.osapublishing.org/ome/fulltext.cfm?uri=ome-7-3-665&id=357883

Investigations of radioluminescence saturation in monocrystalline cerium doped yttrium aluminum garnet (Ce:YAG) exposed to intense extreme ultraviolet (XUV), soft X-ray and X-ray radiation delivered from three free-electron lasers are described in this article. The measurements were performed with wavelengths of 98, 25.6, 13.5 and 0.15 nm. We have found that saturation of the photon yield occurs at an excitation level of 2.0 x 1020 eV/cm3 resulting in an emission of 1.5 x 1018 visible photons per cubic centimeter. This number is much smaller than the concentration of Ce3+ in the scintillator that was equal to 2 x 1020 cm-3. Because the internal radiance efficiency η does not depend strongly on the irradiating photon energy, i.e., η ≈0.035 ± 0.015 in the range 10 to 100 000 eV, the results presented here could be used to predict saturation effects in scintillator slabs placed in imaging systems of bright XUV, X-ray and particle beams. The saturation of the Ce3+ emission is explained by mutual quenching of excitons created at high densities, preceding the stage of energy transfer to the Ce3+ ions.
Permanent Link: http://hdl.handle.net/11104/0295199