The ATLAS New Small Wheel project: SM1 drift panels assembly and finalization

The New Small Wheel project is going to provide the upgrade of the ATLAS end-cap Muon Spectrometer (ATLAS Collaboration, ATLAS muon spectrometer: Technical design report, CERN-LHCC-97-22, ATLAS-TDR-10) to benefit from the LHC luminosity increment planned for the coming years. The tracking system for the New Small Wheels are Micromegas detectors arranged in trapezoidal quadruplets with a surface variable between 2 and 3 m$^{2}$ which depends on the wheel sector (SM1, SM2, LM1, LM2). The SM1 drift panels assembly, finalization procedure and quality tests are presented.