Raman distributed temperature measurement at CERN high energy accelerator mixed field radiation test facility (CHARM)

Iacopo Toccafondo; Tiziano Nannipieri; Alessandro Signorini; Elisa Guillermain; Jochen Kuhnhenn; Markus Brugger; Fabrizio Di Pasquale

doi:10.1117/12.2191551

28 September 2015 Raman distributed temperature measurement at CERN high energy accelerator mixed field radiation test facility (CHARM)

Iacopo Toccafondo, Tiziano Nannipieri, Alessandro Signorini, Elisa Guillermain, Jochen Kuhnhenn, Markus Brugger, Fabrizio Di Pasquale

Author Affiliations +

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 963446 (2015) https://doi.org/10.1117/12.2191551
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

In this paper we present a validation of distributed Raman temperature sensing (RDTS) at the CERN high energy accelerator mixed field radiation test facility (CHARM), newly developed in order to qualify electronics for the challenging radiation environment of accelerators and connected high energy physics experiments. By investigating the effect of wavelength dependent radiation induced absorption (RIA) on the Raman Stokes and anti-Stokes light components in radiation tolerant Ge-doped multi-mode (MM) graded-index optical fibers, we demonstrate that Raman DTS used in loop configuration is robust to harsh environments in which the fiber is exposed to a mixed radiation field. The temperature profiles measured on commercial Ge-doped optical fibers is fully reliable and therefore, can be used to correct the RIA temperature dependence in distributed radiation sensing systems based on P-doped optical fibers.

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Iacopo Toccafondo, Tiziano Nannipieri, Alessandro Signorini, Elisa Guillermain, Jochen Kuhnhenn, Markus Brugger, and Fabrizio Di Pasquale "Raman distributed temperature measurement at CERN high energy accelerator mixed field radiation test facility (CHARM) ", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963446 (28 September 2015); https://doi.org/10.1117/12.2191551

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