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

 
: Toccafondo, I.; Nannipieri, T.; Signorini, A.; Guillermain, E.; Kuhnhenn, J.; Brugger, M.; Pasquale, F. di

:

Kalinowski, H.J. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
24th International Conference on Optical Fibre Sensors 2015. Pt.1 : 28 September - 2 October 2015, Curitiba, Brazil
Bellingham, WA: SPIE, 2015 (Proceedings of SPIE 9634)
ISBN: 978-1-62841-839-2
Paper 963446, 4 pp.
International Conference on Optical Fibre Sensors (OFS) <24, 2015, Curitiba>
English
Conference Paper
Fraunhofer INT ()

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.

: http://publica.fraunhofer.de/documents/N-369733.html