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Gas System for the ATLAS NSW Micromegas Detectors: Design Aspects and Advanced Validation Methods for their QA/QC

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Published: Apr 1, 2019
DOI: https://doi.org/10.12681/hnps.1839
Keywords:
ATLAS Micromegas NSW gas system
T. Alexopoulos
Department of Physics, NTUA
E. Gazis
Department of Physics, NTUA
S. Maltezos
Department of Physics, NTUA
A. Antoniou
Department of Physics, NTUA
V. Gika
Department of Physics, NTUA
S. Karentzos
Department of Physics, NTUA
A. Koulouris
Department of Physics, NTUA
G. Koutelieris
Department of Physics, NTUA
P. Moschovakos
Department of Physics, NTUA Brookhaven National Laboratory
Abstract

In this work we present the design aspects of the Gas Distribution System of NSW Micromegas detectors, simulation results and gas flow / pressure uniformity. We also describe the appropriate gas leak test methods, a conventional and an alternative one, being used in the Quality Assurance and Quality Control of the detectors. For the performance studies we used emulated leak branches based on medical needles. We also describe proposed upgrade stages combining the proposed competitive Flow Rate Loss method with the Lock-in Amplifier technique. Further, we describe the baseline setup for the Gas Tightness Station at BB5/CERN.

Article Details
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  • Oral contributions
References
ATLAS Collaboration, ATLAS New Small Wheel Technical Design Report, in the framework of ATLAS Phase I Upgrade, CERN-LHCC-2013-006, ATLASTDR-20-2013.
S. Maltezos, V. Gika and A. Giannopoulos, Design of Impedance of NSW MM Multiplets using aneedle Channel Along a Solid Cylinder, Internal Report at NTUA (October 2014).
T. Alexopoulos, R. Avramidou, E. Dris, A. Filippas, E. N. Gazis, E. C. Katsoufis, S. Maltezos, P. Savva, G. Stavropoulos, G. Tsipolitis, A Gas Leak Rate Measurement System for the ATLAS MUONBIS-Monitored Drift Tubes, Nucl. Instr. Meth. A 521 (2004) 332-342.
T. Alexopoulos, E. Gazis, S. Maltezos, Investigation of Gas Leak Test Methods for the NSW Micromegas Multiplet’s Mass Production, Internal ATLAS Communication Note, ATLCOM-MUON-2015-054, https://cds.cern.ch/record/2056649.
R. J. Higgins, Electronics with Digital and Analog Integrated Circuits, Prentice-Hall,INC. (1983).