Showing papers by "Giuseppe Iaselli published in 2008"
01 Mar 2008
TL;DR: The Resistive Plate Chamber (RPC) detector of the Compact Muon Solenoid (CMS) experiment at the LHC proton collider (CERN, Switzerland) will employ a gas re-circulation system.
Abstract: Due to its large volume (18 m3)the Resistive Plate Chamber (RPC) detector of the Compact Muon Solenoid (CMS) experiment at the LHC proton collider (CERN, Switzerland) will employ a gas re-circulation system. Since the mixture composition and quality are crucial issues for the detector operation, CMS-RPC will use an online gas analysis and monitoring system. An overview of both the CMS-RPC gas system and gas monitoring system is given and the project parameters are described.
19 citations
01 Sep 2008-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this paper, the formation of reactive compounds in the gas mixture during Resistive Plate Chambers (RPCs) operation at the CERN Gamma Irradiation Facility (GIF) is studied.
Abstract: The formation of reactive compounds in the gas mixture during Resistive Plate Chambers (RPCs) operation at the CERN Gamma Irradiation Facility (GIF) is studied. Results from two different types of chambers are discussed: 50 × 50 cm 2 RPC prototypes and two final CMS-RB1 chambers. The RB1 detectors were also connected to a closed loop gas system. Gas composition and possible additional impurities have been monitored in different gamma irradiation conditions both in open and closed loop modes using a gas chromatograph. Dedicated measurements for fluoride concentration in the exhausted gas line were performed at different irradiations and operation conditions using a specific electrode and a High-Performance Liquid Chromatograph. The efficiency of the purifiers system present in the closed loop in removing the F - and others impurities has also been investigated. Finally, the chemical composition of the RPC electrode surface has been analyzed using an electron microscope equipped with an EDS/X-ray.
17 citations
TL;DR: In this article, the results from the gas gain monitoring (GGM) system for the muon detector using RPC in the CMS experiment at the LHC are presented, which is designed to provide fast and accurate determination of any shift in the working point of the chambers due to gas mixture changes.
Abstract: Results from the gas gain monitoring
(GGM) system for the muon detector using RPC in the CMS experiment at the LHC is presented.
The system is designed to provide fast and accurate determination of any shift in the working point of the chambers due to gas mixture changes.
13 citations
CERN1
TL;DR: In this article, the results from the gas gain monitoring (GGM) system for the muon detector using RPC in the CMS experiment at the LHC were presented, which is designed to provide fast and accurate determination of any shift in the working point of the chambers due to gas mixture changes.
Abstract: Results from the gas gain monitoring (GGM) system for the muon detector using RPC in the CMS experiment at the LHC is presented The system is designed to provide fast and accurate determination of any shift in the working point of the chambers due to gas mixture changes
3 citations