A novel temperature monitoring sensor for gas-based detectors in large HEP experiments

11 Jun 2011, 12:00
20m
Superior B (Sheraton Hotel)

Superior B

Sheraton Hotel

Oral Presentation Gaseous Detectors Gaseous Detectors

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)

Presentation materials