The large inner Micromegas modules for the Atlas Muon Spectrometer upgrade: Construction, quality control and characterization

• DOI: 10.1016/j.nima.2021.166143
• Publication Date: 2021-12-06T16:37:15Z
• Authors: J. Allard; N. Andari; M. Anfreville; D. Attié; E. Aubernon; S. Aune; H. Bachacou; F. Balli; F. Bauer; J. Beltramelli; J. Bennet; T. Benoit; H. Bervas; T. Bey; S. Bouaziz; M. Boyer; G. Cara; T. Chaleil; T. Chevalérias; X. Coppollani; J. Costa; G. Decock; F. Deliot; D. Denysiuk; D. Desforge; G. Disset; G.A. Durand; R. Durand; J. Elman; E. Ferrer-Ribas; M. Fontaine; A. Formica; J. Galán; W. Gamache; A. Giganon; J. Giraud; P.F. Giraud; G. Glonti; C. Goblin; P. Graffin; J.C. Guillard; S. Hassani; S. Hervé; S. Javello; F. Jeanneau; D. Jourde; S. Jurie; M. Kebbiri; T. Kawamoto; C. Lampoudis; J.F. Laporte; D. Leboeuf; M. Lefèvre; M. Lohan; C. Loiseau; P. Magnier; I. Mandjavidze; J. Manjarrés; P. Mas; M. Mur; R. Nikolaidou; A. Peyaud; D. Pierrepont; Y. Piret; P. Ponsot; G. Prono; M. Riallot; F. Rossi; P. Schune; T. Vacher; M. Vandenbroucke; A. Vigier; C. Vuillemin; M. Usseglio; Z. Wu
• Keywords: MicroMegas detector; Upgrade; ATLAS experiment

The steadily increasing luminosity of the LHC requires an upgrade with high-rate and high-resolution detector technology for inner end cap ATLAS muon spectrometer: New Small Wheels (NSW). In order to achieve goal precision tracking at a hit rate about 15 kHz/cm$^2$ radius NSW, large area Micromegas quadruplets 100\,\microns spatial resolution per plane have been produced. % IRFU, from CEA research center Saclay, is responsible production validation LM1 modules. construction, production, qualification largest detectors ever built are reported here. Performance results under cosmic characterisation will also be discussed.