Large scale test of wedge shaped micro strip gas counters Ackermann, M.; Atz, S.; Aulchenko, V. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
1999, Letnik:
436, Številka:
3
Journal Article
Recenzirano
In order to check the system aspects of the forward–backward MSGC tracker designed for the future CMS experiment at LHC, 38 trapezoidal MSGC counters assembled in six multi-substrates detector ...modules were built and exposed to a muon beam at the CERN SPS. Results on the gain uniformity along the wedge-shaped strip pattern and across the detector modules are shown together with measurements of the detection efficiency and the spatial resolution.
The HL-LHC phase is designed to increase by an order of magnitude the amount of data to be collected by the LHC experiments. To achieve this goal in a reasonable time scale the instantaneous ...luminosity would also increase by an order of magnitude up to \(6.10^{34} cm^{-2} s^{-1}\) . The region of the forward muon spectrometer (\(|{\eta}| > 1.6\)) is not equipped with RPC stations. The increase of the expected particles rate up to \(2 kHz/cm^{2}\) (including a safety factor 3) motivates the installation of RPC chambers to guarantee redundancy with the CSC chambers already present. The actual RPC technology of CMS cannot sustain the expected background level. The new technology that will be chosen should have a high rate capability and provides a good spatial and timing resolution. A new generation of Glass-RPC (GRPC) using low-resistivity (LR) glass is proposed to equip at least the two most far away of the four high \({\eta}\) muon stations of CMS. First the design of small size prototypes and studies of their performance in high-rate particles flux is presented. Then the proposed designs for large size chambers and their fast-timing electronic readout are examined and preliminary results are provided.
Operation of micro strip gas counters with Ne-DME gas mixtures Bouhali, O; Udo, F; Van Doninck, W ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
08/1996, Letnik:
378, Številka:
3
Journal Article
Recenzirano
The performance of micro-strip gas counters (MSGCs) has been studied with gas mixtures of neon and dimethylether. The setup consisted of two 10 × 10 cm2 MSGC detectors placed in a cosmic ray ...hodoscope made of twelve drift chambers. Measurements are presented for the collected charge and the detection efficiency. A Monte Carlo simulation has been used to verify our understanding of the efficiency measurements. The simulation has also allowed to estimate the transverse diffusion coefficient of the electrons in the gas and to predict the spatial resolution of the detectors.
The high pseudo-rapidity region of the CMS muon system is covered by Cathode Strip Chambers (CSC) only and lacks redundant coverage despite the fact that it is a challenging region for muons in terms ...of backgrounds and momentum resolution. In order to maintain good efficiency for the muon trigger in this region additional RPCs are planned to be installed in the two outermost stations at low angle named RE3/1 and RE4/1. These stations will use RPCs with finer granularity and good timing resolution to mitigate background effects and to increase the redundancy of the system.
The CMS experiment, located at the CERN Large Hadron Collider, has a redundant muon system composed by three different detector technologies: Cathode Strip Chambers (in the forward regions), Drift ...Tubes (in the central region) and Resistive Plate Chambers (both its central and forward regions). All three are used for muon reconstruction and triggering. During the first long shutdown (LS1) of the LHC (2013-2014) the CMS muon system has been upgraded with 144 newly installed RPCs on the forth forward stations. The new chambers ensure and enhance the muon trigger efficiency in the high luminosity conditions of the LHC Run2. The chambers have been successfully installed and commissioned. The system has been run successfully and experimental data has been collected and analyzed. The performance results of the newly installed RPCs will be presented.
The RPC muon detector of the CMS experiment at the LHC (CERN, Geneva, Switzerland) is equipped with a Gas Gain Monitoring (GGM) system. A report on the stability of the system during the 2011-2012 ...data taking run is given, as well as the observation of an effect which suggests a novel method for the monitoring of gas mixture composition.
Studies of an MSGC equipped with a GEM grid as a tracking device Beaumont, W.; Beckers, T.; Troy, J.De ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
12/1998, Letnik:
419, Številka:
2-3
Journal Article
Recenzirano
The performance of a Micro Strip Gas Counter (MSGC) equipped with a Gas Electron Multiplier (GEM) has been studied in a cosmic hodoscope. Using Ne/DME gas mixtures, measurements have been performed ...to study gain, transparency and spatial resolution.
