The facility for ATLAS resistive plate chambers assembly
نویسندگان
چکیده
The dedicated facility built for the assembling of the nearly 1000 RPC units of the ATLAS m-spectrometer is described in detail. The necessity of keeping the gravitational sagitta below 10 mm for the 5-m-long RPC units has driven the careful design of the extruded Al lateral profiles and suspension end-plates. A special assembly table allows to maintain the mechanical tolerances of each unit well below 71 mm in all dimensions. Both gas gaps inside each unit are kept at a constant pressure of 10 Pa over the whole surface, in order to ensure the uniformity of the gap. r 2003 Elsevier Science B.V. All rights reserved.
منابع مشابه
Resistive Plate Chambers in ATLAS
The ATLAS first level muon trigger is based, in the rapidity region ( v ( 5 1.05, on fast and finely segmented gaseous detectors, Resistive Plate Chambers (RPCs) . A prototype of a small scale RPC trigger tower has been assembled and tested. We present results on efficiency, time resolution, cluster size and collected charge. The detectors, filled with a non-flammable and environment-safe gas m...
متن کاملResistive plate chambers in running and future experiments
This document surveys the RPC-based detection systems of running and future collider experiments focusing on the implications of the choice of some basic detector features: number of gaps, electrode material and operating mode. The muon identification systems of the B-factory experiments BaBar and Belle is described and the RPC performance since the first operation of the detectors is briefly r...
متن کاملResistive Plate Chambers in avalanche mode: a comparison between model predictions and experimental results1
In this paper a model simulating the main aspects of avalanche growth and signal development in Resistive Plate Chambers (RPCs) is presented. The model has been used to compute the performances, in particular, charge distribution and efficiency of singledoubleand multi-gap RPCs, and to compare them with the available experimental results. This model could be used to optimize the characteristics...
متن کامل. in s - de t ] 4 J an 2 00 6 ATLAS RPC QA results at INFN Lecce
The main results of the quality assurance tests performed on the Resistive Plate Chamber used by the ATLAS experiment at LHC as muon trigger chambers are reported and discussed. These are dark current, gas volume tomography, gas tightness, efficiency, and noise rate.
متن کاملA Highly Selective First-Level Muon Trigger With MDT Chamber Data for ATLAS at HL-LHC
Highly selective triggers are essential for the physics programme of the ATLAS experiment at HL-LHC where the instantaneous luminosity will be about an order of magnitude larger than the LHC instantaneous luminosity in Run 1. The first level muon trigger rate is dominated by low momentum muons below the nominal trigger threshold due to the moderate momentum resolution of the Resistive Plate and...
متن کامل