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A thin layer fiber-coupled luminescence dosimeter based on Al2O3:C

In this paper we present a fiber-coupled luminescent Al2O3:C dosimeter probe with high spatial resolution (0.1 mm). It is based on thin layers of Al2O3:C crystal powder and a UV-cured acrylate monomer composition. The fabrication of the thin layers is described in detail. No influence of the introdu...

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Bibliographic Details
Main Authors: Klein, Felix Alexander (Author) , Greilich, Steffen (Author) , Andersen, C. E. (Author) , Lindvold, L. R. (Author) , Jäkel, Oliver (Author)
Format: Article (Journal)
Language:English
Published: 25 May 2011
In: Radiation measurements
Year: 2011, Volume: 46, Issue: 12, Pages: 1607-1609
ISSN:1879-0925
DOI:10.1016/j.radmeas.2011.05.030
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.radmeas.2011.05.030
Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S1350448711001971
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Author Notes:F.A. Klein, S. Greilich, C.E. Andersen, L.R. Lindvold, O. Jäkel

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520 |a In this paper we present a fiber-coupled luminescent Al2O3:C dosimeter probe with high spatial resolution (0.1 mm). It is based on thin layers of Al2O3:C crystal powder and a UV-cured acrylate monomer composition. The fabrication of the thin layers is described in detail. No influence of the introduced polymer host matrix on the dosimetric properties was observed. Depth-dose measurements with the new detectors in a 142.66 MeV proton and 270.55 MeV/u carbon ion beam are presented as example applications. We used an RL protocol with saturated crystals allowing for time-effective measurements without sensitivity corrections. For protons, a relative luminescence efficiency ηHCP of 0.715 ± 0.014 was found in the Bragg peak. For carbon ions, a value of 0.498 ± 0.001 was found in the entrance channel, 0.205 ± 0.015 in the Bragg peak, and a mean of 0.413 ± 0.050 in the tail region. The mean range of the protons measured with this new detector deviated by less than 1% from the reference value. For both ion types, the stem effect contributed less than 0.8% of the RL signal. 
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