Optical Fibers as Dosimeter Detectors for Mixed Proton/Neutron Fields—A Biological Dosimeter

Jana Niedermeier, Crystal Penner, Samuel Usherovich, Camille Bélanger-Champagne, Elisabeth Paulssen, Cornelia Hoehr*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
40 Downloads (Pure)


In recent years, proton therapy has gained importance as a cancer treatment modality due to its conformality with the tumor and the sparing of healthy tissue. However, in the interaction of the protons with the beam line elements and patient tissues, potentially harmful secondary neutrons are always generated. To ensure that this neutron dose is as low as possible, treatment plans could be created to also account for and minimize the neutron dose. To monitor such a treatment plan, a compact, easy to use, and inexpensive dosimeter must be developed that not only measures the physical dose, but which can also distinguish between proton and neutron contributions. To that end, plastic optical fibers with scintillation materials (Gd2O2S:Tb, Gd2O2S:Eu, and YVO4:Eu) were irradiated with protons and neutrons. It was confirmed that sensors with different scintillation materials have different sensitivities to protons and neutrons. A combination of these three scintillators can be used to build a detector array to create a biological dosimeter.

Original languageEnglish
Article number324
Number of pages11
JournalElectronics (Switzerland)
Issue number2
Publication statusPublished - 2023


  • biological dosimeter
  • Bragg peak
  • neutrons
  • optical fibers
  • proton therapy
  • protons
  • relative dosimetry


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