Abstract
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 hHCP 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.
Original language | English |
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Journal | Radiation Measurements |
Volume | 46 |
Issue number | 12 |
Pages (from-to) | 1607-1609 |
ISSN | 1350-4487 |
DOIs | |
Publication status | Published - 2011 |
Keywords
- High spatial resolution
- Proton therapy
- Fiber-coupled
- Ion beam therapy
- Luminescence dosimetry
- Radioluminesence