Radiation hard fiber optic thermo-hygrometers for relative humidity detection in the CMS experiment at CERN

G. Berruti; M. Consales; M. Giordano; S. Buontempo; G. Breglio; A. Makovec; P. Petagna; A. Cusano

doi:10.1117/12.2059519

2 June 2014 Radiation hard fiber optic thermo-hygrometers for relative humidity detection in the CMS experiment at CERN

G. Berruti, M. Consales, M. Giordano, S. Buontempo, G. Breglio, A. Makovec, P. Petagna, A. Cusano

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91579H (2014) https://doi.org/10.1117/12.2059519
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

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.

Citation Download Citation

G. Berruti, M. Consales, M. Giordano, S. Buontempo, G. Breglio, A. Makovec, P. Petagna, and A. Cusano "Radiation hard fiber optic thermo-hygrometers for relative humidity detection in the CMS experiment at CERN ", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91579H (2 June 2014); https://doi.org/10.1117/12.2059519

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