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Proceedings Paper

Raman distributed temperature measurement at CERN high energy accelerator mixed field radiation test facility (CHARM)
Author(s): Iacopo Toccafondo; Tiziano Nannipieri; Alessandro Signorini; Elisa Guillermain; Jochen Kuhnhenn; Markus Brugger; Fabrizio Di Pasquale
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Paper 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.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963446 (28 September 2015); doi: 10.1117/12.2191551
Show Author Affiliations
Iacopo Toccafondo, Scuola Superiore Sant'Anna (Italy)
CERN (Switzerland)
Tiziano Nannipieri, INFIBRA TECHNOLOGIES S.r.l. (Italy)
Alessandro Signorini, INFIBRA TECHNOLOGIES S.r.l. (Italy)
Elisa Guillermain, CERN (Switzerland)
Jochen Kuhnhenn, Fraunhofer-Institut Naturwissenschaftlich-Technische Trendanalysen (Germany)
Markus Brugger, CERN (Switzerland)
Fabrizio Di Pasquale, Scuola Superiore Sant'Anna (Italy)
Infibra Technologies S.r.l. (Italy)


Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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