Speaker
Dr
Michele Caponero
(ENEA and INFN Frascati)
Description
Operating and planned HEP experiments use and study large area gas-based detectors for charged particles.
For most such detectors the control of the gas temperature is of foremost importance because of the
very large dependance on the gas gain. Examples of detectors whose efficiency is particularly dependent on
temperature are Resistive Plate Counters (RPC) and Gas Electron Multipliers (GEM). Large arrays of RPC's and GEM's are in operation in running experiments.
We propose a gas temperature monitoring system specifically suited for large scale HEP experiments. The proposed system is based on fiber optic technology and uses Fiber Gragg Grating (FBG) sensors as temperature probes. Taking advantage of the wavelength division multiplexing technique applicable in data taking of FBG sensors, the proposed system allows to connect tens of sensors in series along one single optical fiber, thus greatly simplifying cable routing. Moreover, the proposed technology is an intrinsic spectroscopic optical technique with no electrically powered component at the sensing point, thus neither suffering nor causing e.m. disturbances.
We have designed and successfully tested a prototype sensing device on a fully functional RPC module. We show experimental results including long term stability, precision and resolution. We describe the concept design of a full scale monitoring system suitable for HEP experiments.
Author
Dr
Michele Caponero
(ENEA and INFN Frascati)
Co-authors
Dr
Cristian Vendittozzi
(Roma 1 Univ.)
Prof.
Ferdinando Felli
(INFN Frascati and Roma 1 Univ.)
Prof.
Giovanna Saviano
(INFN Frascati and Roma 1 Univ.)
Dr
Luigi Benussi
(INFN Frascati)
Dr
Mauro Ferrini
(INFN Frascati and Roma 1 Univ.)
Dr
Stefano Bianco
(INFN Frascati)
Mr
Stefano Colafranceschi
(INFN Frascati)
