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Title: Strain Measurement in the Spallation Target Using High-Radiation-Tolerant Fiber Sensors

We describe the measurement of fast dynamic strains in the mercury target module of the spallation neutron source using customized high-radiation-tolerant fiber-optic strain sensors. The sensors are made from fluorine-doped single-mode optical fibers that demonstrated high radiation tolerance at 1300 nm. A digital phase demodulation scheme is employed in the signal interrogation system, which enables high bandwidth measurement and has an excellent adaptability to sensor output power fluctuations and sensor gap variations. Fast transient strain waveforms induced by high-energy, high-intensity proton pulses are successfully measured. Here, the sensors have survived radiation doses of 10 9 Gy. Both measurement bandwidth and radiation tolerance of the sensors are an order of magnitude higher than their commercial counterparts.
Authors:
ORCiD logo [1] ; ORCiD logo [1] ; ORCiD logo [1] ; ORCiD logo [1] ; ORCiD logo [1] ; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
IEEE Sensors Journal
Additional Journal Information:
Journal Volume: 18; Journal Issue: 9; Journal ID: ISSN 1530-437X
Publisher:
IEEE
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Optical fiber sensors; Optical fiber cables; Optical fibers; Mercury (planets); Optical interferometry
OSTI Identifier:
1506819

Liu, Yun, Blokland, Willem, Long, Cary D., Riemer, Bernard W., Wendel, Mark W., and Winder, Drew E.. Strain Measurement in the Spallation Target Using High-Radiation-Tolerant Fiber Sensors. United States: N. p., Web. doi:10.1109/JSEN.2018.2816261.
Liu, Yun, Blokland, Willem, Long, Cary D., Riemer, Bernard W., Wendel, Mark W., & Winder, Drew E.. Strain Measurement in the Spallation Target Using High-Radiation-Tolerant Fiber Sensors. United States. doi:10.1109/JSEN.2018.2816261.
Liu, Yun, Blokland, Willem, Long, Cary D., Riemer, Bernard W., Wendel, Mark W., and Winder, Drew E.. 2018. "Strain Measurement in the Spallation Target Using High-Radiation-Tolerant Fiber Sensors". United States. doi:10.1109/JSEN.2018.2816261. https://www.osti.gov/servlets/purl/1506819.
@article{osti_1506819,
title = {Strain Measurement in the Spallation Target Using High-Radiation-Tolerant Fiber Sensors},
author = {Liu, Yun and Blokland, Willem and Long, Cary D. and Riemer, Bernard W. and Wendel, Mark W. and Winder, Drew E.},
abstractNote = {We describe the measurement of fast dynamic strains in the mercury target module of the spallation neutron source using customized high-radiation-tolerant fiber-optic strain sensors. The sensors are made from fluorine-doped single-mode optical fibers that demonstrated high radiation tolerance at 1300 nm. A digital phase demodulation scheme is employed in the signal interrogation system, which enables high bandwidth measurement and has an excellent adaptability to sensor output power fluctuations and sensor gap variations. Fast transient strain waveforms induced by high-energy, high-intensity proton pulses are successfully measured. Here, the sensors have survived radiation doses of 10 9 Gy. Both measurement bandwidth and radiation tolerance of the sensors are an order of magnitude higher than their commercial counterparts.},
doi = {10.1109/JSEN.2018.2816261},
journal = {IEEE Sensors Journal},
number = 9,
volume = 18,
place = {United States},
year = {2018},
month = {3}
}