ATLAS muon drift tube production in Seattle

The facility that we developed for producing precision drift tubes of the ATLAS forward muon system is described in this paper. We have completed the production of approximately 30 000 drift tubes in Seattle. The results of quality assurance for these tubes are presented. The drift tube assembly and quality assurance are two separation operations that proceed in parallel. The quality of the drift tube that we produced meets the very stringent requirements of the ATLAS experiment. The typical average production rate is 2 to 3 min per tube and the rejection rate is less than 1.5%.