[en] Muons provide a clear signature for many of the interesting processes which will be studied at the LHC. The goal of the CMS muon detector is to provide identification, track reconstruction and trigger of muons. To do this, the CMS muon system will make use of several detectors: Drift Tubes (DT), Cathode Strip Chambers (CSC) and Resistive Plate Chambers (RPC). In this paper, a short description of the main features and status of each detector is presented

[en] During the first phase of operation of the LHC, with luminosities of the order of L=10³³ cm^-2 s^-1, a large production of bb-bar pairs will allow the measurement of CP violation effects and other studies in B-physics. Identification and measurement of muons play an important role in these studies. This will be achieved in CMS with several technologies: in the barrel part Drift Tube Chambers (DT) can be used, whereas in the endcaps Cathode Strips Chambers (CSC) are better suited. A third type of detector, Resistive Plate Chambers (RPC) will also be present in both, barrel and endcaps, providing a redundant and complementary trigger. A description of the three detectors, their main features and performance is presented

[en] We present a design of a compensating quartz fiber calorimeter, made of a unique active section, and ment for the specific physics requirements of the low angle calorimetry in LHC experiments. The purposed calorimeter is exemplified for the case of the CMS experiment

[en] Compact Muon Solenoid (CMS) is one of the detectors designed to study very high-energy proton-proton interactions at the Large Hadron Collider (LHC) starting from 2007. Muons produced from these collisions will provide clean signatures for many of the interesting processes to be studied at the LHC. CMS has put great emphasis on developing a highly efficient muon system. The system has been designed to identify, reconstruct and measure muons with high efficiency and accuracy. Three different detectors have been chosen: Drift Tubes (DT), Cathode Strips Chambers (CSC) and resistive plate chambers (RPC). In this paper, we will describe the main features of each of these detectors and the system

[en] Part of the readout system for the CMS muon drift chambers has been tested in test beams at CERN/GIF. Read Out Board (ROB) and HPTD have been validated with signals from a real muon beam, with an structure and flux similar to LHC operating conditions and using one of the chambers produced in CIEMAT already located in the test beam area under normal gas and voltage conditions. (Author) 5 refs

[en] An iron/gas parallel plate volume calorimeter prototype, working in the avalanche mode, has been tested using electrons of 20 to 150 GeV/c momentum with high voltages varying from 5400 to 5600 V (electric fields ranging from 36 to 37 KV/cm), and a gas mixture of CF4/CO, (80/20%). The collected charge was measured as a function of the high voltage and of the electron energy. The energy resolution was also measured. Comparisons are made with Monte-Carlo predictions. Agreement between data and simulation allows the calculation of the expected performance of a full size calorimeter. (Author)

[en] A prototype of the CMS Barrel Muon Detector incorporating all the features of the final chambers was built at CIEMAT using the mass production assembly procedures and tools. The performance of this prototype was studied in a muon test beam at CERN and the results obtained are presented here. (Author)

[en] The baseline option for the very forward calorimetry in the CMS experiment is an iron/gas calorimeter based on parallel plate chambers. A small prototype module of such a calorimeter, has been tested using electrons of 5 to 100 GeV/c momentum with various high voltages and two gases: CO2 (100%) and CF4/CO2 (80/20), at atmospheric pressure. The collected charge has been measured as a function of the high voltage and of the electron energy. The energy resolution has also been measured. Comparisons have been made with Monte-Carlo predictions. Agreement between data an simulation allows to make and estimation of the expected performance of a full size calorimeter. (Author) 23 refs

[en] The baseline option for the very forward calorimetry in the CMS experiment is an iron/gas calorimeter based on parallel plate chambers. A small prototype module of such a calorimeter, has been tested using electrons of 5 to 100 GeV/c momentum with various high voltages and two gases: CO₂ (100%) and CF₄/CO₂(80/20), at atmospheric pressure. The collected charge has been measured as a function of the high voltage and of the electron energy. The energy resolution has also been measured. Comparisons have been made with Monte-Carlo predictions. Agreement between data an simulation allows to make and estimation of the expected performance of a full size calorimeter. (Author)

[en] We present the design of a compensating quartz fibre calorimeter, made of a unique active section, for the specific physics requirements of the small angle calorimetry for the LHC experiments. The proposed calorimeter is exemplified for the case of the CMS experiment. (orig.)