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Proceedings Paper

Radiation hard fiber optic thermo-hygrometers for relative humidity detection in the CMS experiment at CERN
Author(s): G. Berruti; M. Consales; M. Giordano; S. Buontempo; G. Breglio; A. Makovec; P. Petagna; A. Cusano
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Paper Abstract

This work investigates the performances and the radiation hardness capability of optical thermo-hygrometers based on Fiber Bragg Gratings (FBG) technology for humidity monitoring in the Compact Muon Solenoid experiment (CMS) at CERN, in Geneva. Extensive characterizations in terms of sensitivity, repeatability and accuracy on 80 specially produced polyimide-coated FBG sensors and 80 commercial temperature FBG sensors are presented. Progressive irradiation campaigns with γ- ionizing radiations were also performed. Results showed that the sensors sensitivity is unchanged after each radiation exposure; while the wavelength peak exhibits a radiation-induced shift. The saturation properties of this shift are discussed.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91579H (2 June 2014); doi: 10.1117/12.2059519
Show Author Affiliations
G. Berruti, Univ. degli Studi del Sannio (Italy)
CERN (Switzerland)
M. Consales, Univ. degli Studi del Sannio (Italy)
M. Giordano, Istituto per i Materiali Compositi e Biomedici. CNR (Italy)
S. Buontempo, INFN, CNR (Italy)
G. Breglio, Univ. degli Studi di Napoli Federico II (Italy)
A. Makovec, The Univ. of Debrecen (Hungary)
P. Petagna, CERN (Switzerland)
A. Cusano, Univ. degli Studi del Sannio (Italy)


Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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