This paper describes the small-diameter monitored drift-tube detector construction at the University of Michigan as a contribution to the ATLAS Muon Spectrometer upgrade for the high-luminosity Large Hadron Collider at CERN. Measurements of the first 30 chambers built at Michigan show that the drift tube wire position accuracy meets the specification of 20 microns. The positions of the platforms for alignment and magnetic field sensors are all installed well within the required precision. The cosmic ray test measurements show single wire tracking resolution of 100 +- 7 microns with an average detection efficiency above 99 %. The infrastructure, tooling, techniques, and procedures for chamber production are described in detail. The results from the chamber quality control tests of the first 30 constructed chambers are reported.
@article{arxiv.2211.00714,
title = {Construction of Precision sMDT Detector for ATLAS Muon Spectrometer Upgrade},
author = {D. Amidei and N. Anderson and A. Chen and E. Carpenter and L. Cooperrider and T. Dai and E. Diehl and C. Ferretti and Y. Guo and J. Li and X. Meng and K. Nelson and V. Pillsbury and E. Salzer and T. Schwarz and L. Simpson and Z. Wang and C. Weaverdyck and C. Wei and Z. Yang and M. Yuan and B. Zhou and J. Zhu},
journal= {arXiv preprint arXiv:2211.00714},
year = {2023}
}