Applied Sciences (Jul 2020)

Fiber-Optic Bragg Gratings for Temperature and Pressure Measurements in Isotope Production Targets for Nuclear Medicine

  • Michael Bakaic,
  • Matthew Hanna,
  • Cyril Hnatovsky,
  • Dan Grobnic,
  • Stephen Mihailov,
  • S. Stefan Zeisler,
  • Cornelia Hoehr

DOI
https://doi.org/10.3390/app10134610
Journal volume & issue
Vol. 10, no. 13
p. 4610

Abstract

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A Bragg grating inscribed into an inorganic optical fiber was tested in proton and neutron fields up to doses of 472 Gy. Observation showed that radiation had no effect on the performance of the Fiber Bragg Grating (FBG) used as a gauge measuring temperature and pressure. The FBG sensor was subsequently employed to measure the temperature and pressure inside a liquid isotope production target for nuclear medicine. The fiber Bragg grating measured the temperature and pressure of a water target as a 12 MeV proton beam impinged on it in real time and was tested with beam currents of up to 20 µA.

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