Soft x-ray free-electron laser induced damage to inorganic scintillators - Sorbonne Université
Article Dans Une Revue Optical Materials Express Année : 2015

Soft x-ray free-electron laser induced damage to inorganic scintillators

Nicola Coppola
  • Fonction : Auteur
  • PersonId : 881456
Harald Sinn
  • Fonction : Auteur

Résumé

An irreversible response of inorganic scintillators to intense soft x-ray laser radiation was investigated at the FLASH (Free-electron LASer in Hamburg) facility. Three ionic crystals, namely, Ce:YAG (cerium-doped yttrium aluminum garnet), PbWO4 (lead tungstate), and ZnO (zinc oxide), were exposed to single 4.6 nm ultra-short laser pulses of variable pulse energy (up to 12 μJ) under normal incidence conditions with tight focus. Damaged areas produced with various levels of pulse fluences, were analyzed on the surface of irradiated samples using differential interference contrast (DIC) and atomic force microscopy (AFM). The effective beam area of 22.2 ± 2.2 μm2 was determined by means of the ablation imprints method with the use of poly(methyl methacrylate) - PMMA. Applied to the three inorganic materials, this procedure gave almost the same values of an effective area. The single-shot damage threshold fluence was determined for each of these inorganic materials. The Ce:YAG sample seems to be the most radiation resistant under the given irradiation conditions, its damage threshold was determined to be as high as 660.8 ± 71.2 mJ/cm2. Contrary to that, the PbWO4 sample exhibited the lowest radiation resistance with a threshold fluence of 62.6 ± 11.9 mJ/cm2. The threshold for ZnO was found to be 167.8 ± 30.8 mJ/cm2. Both interaction and material characteristics responsible for the damage threshold difference are discussed in the article.
Fichier principal
Vignette du fichier
ome-5-2-254.pdf (1.29 Mo) Télécharger le fichier
Origine Publication financée par une institution
Loading...

Dates et versions

hal-01275445 , version 1 (17-02-2016)

Licence

Identifiants

Citer

Tomas Burian, Vera Hajkova, Jaromir Chalupsky, Luděk Vyšín, Pavel Bohacek, et al.. Soft x-ray free-electron laser induced damage to inorganic scintillators. Optical Materials Express, 2015, 5 (2), pp.254-264. ⟨10.1364/OME.5.000254⟩. ⟨hal-01275445⟩
2360 Consultations
555 Téléchargements

Altmetric

Partager

More