Test and performances of the RPC trigger chambers of the ATLAS experiment at LHC (original) (raw)
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RPC cosmic ray tests in the ATLAS experiment
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2007
Extensive tests with cosmic rays were performed with Resistive Plate Chamber (RPC) trigger chambers belonging to 6 muon stations of sector 13 installed in the ATLAS muon spectrometer. We illustrate the results of this pre-commissioning phase, which represents a test bench for the final commissioning of the ATLAS RPC system with cosmic rays. r
The LECCE cosmic ray testing facility for the ATLAS RPC
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2006
A detailed description of a dedicated facility built in the Lecce INFN and Physics Department High Energy Laboratory to test part of the Resistive Plate Counters (RPC) of the ATLAS barrel muon spectrometer is presented. In this cosmic ray test stand the chambers are operated for the first time, after being assembled and equipped with all required services for gas and electrical connections. A complete set of measurements is performed on each chamber in order to certificate its quality and performances before the installation in the experiment.
ATLAS RPC perfomance on a dedicated cosmic ray test-stand
Nuclear Physics B-proceedings Supplements, 2008
596 RPC chambers have been assembled in the ATLAS Muon Spectrometer, covering a 7300 m 2 sensitive area with 355.000 read out channels. 1116 RPC Units were produced and tested before integration and installation on the experiment [1]. 192 ATLAS RPCs, the Barrel Outer Large (BOL) units were tested in INFN Roma Tor Vergata test stand.
RPCs for the ATLAS Level-1 muon trigger: Test beam results
1998
Abstract A full-size (270 90 cm2) and a small-size (50 50 cm2) RPC trigger tower prototype have been tested at the ATLAS H8 beam facility at CERN. Results on the basic performance of the full-size chambers, operated in avalanche mode, are presented. Dedicated studies have been done on the small-size chambers to measure the collected charge and the streamer probability as a function of the applied voltage and to optimise the front-end amplifier threshold.
The RPC LVL1 trigger system of the muon spectrometer of the ATLAS experiment at LHC
2004
Abstract The Atlas Trigger System has been designed to reduce the LHC interaction rate of about 1 GHz to the foreseen storage rate of about 100 Hz. Three trigger levels are applied in order to fulfill such a requirement. A detailed simulation of the ATLAS experiment including the hardware components and the logic of the Level-1 Muon trigger in the barrel of the muon spectrometer has been performed. This simulation has been used not only to evaluate the performances of the system but also to optimize the trigger logic design.
The ATLAS LVL1 Barrel Muon Trigger Commissioning with Cosmic Rays
2006
Abstract The ATLAS muon spectrometer, currently in the installation phase, uses dedicated detectors to be able to trigger on high transverse momentum muons in the range 6-20 GeV/c resistive plate chambers (RPC) are equipping the barrel region in the middle and outer station, while precision chambers (monitored drift tubes, MDT) are present also in the inner layer.
The RPC level-1 muon trigger of the ATLAS experiment at the LHC
2004
Abstract The three-level ATLAS trigger system has been designed to reduce the initial LHC interactions rate from 1 GHz, to~ 100 Hz in order to allow permanent data storage. This result must be achieved preserving the less probable physics signals against a large background therefore providing a challenge task for the trigger and DAQ system. The level-1 muon trigger in the barrel region of the muon spectrometer is provided by resistive plate chambers (RPC) working in avalanche mode.
IEEE Transactions on Nuclear Science, 2000
The ATLAS detector at CERN's Large Hadron Collider (LHC) will be exposed to proton-proton collisions from beams crossing at 40 MHz. A three-level trigger system will select potentially interesting events in order to reduce the readout rate to about 200 Hz. The first trigger level is implemented in custom-built electronics and makes an initial fast selection based on detector data of coarse granularity. It has to reduce the rate by a factor of 10 4 to less than 100 kHz. The other two consecutive trigger levels are in software and run on PC farms. We present an overview of the first-level central trigger and the muon barrel trigger system and report on the current installation status. Moreover, we show analysis results of cosmicray data recorded in situ at the ATLAS experimental site with final or close-to-final hardware.