Abstract
Resistive plate chambers (RPCs) with electrodes of high-pressure phenolic laminate and small gas gap widths down to 1 mm provide large area tracking at relatively low cost in combination with high rate capability and fast response with excellent time resolution of better than 500 ps. Thin-gap RPCs will be employed in the upgrade of the barrel muon system of the ATLAS experiment at HL-LHC. The large demand for RPCs exceeds the presently available production capacities. At the same time, the requirements on mechanical precision, reliability and reproducibility for collider detectors have increased. Additional suppliers with industry-style quality assurance are urgently needed. We have established RPC production procedures compliant with industrial requirements and are in the process of certifying several companies for RPC production for the ATLAS upgrade for HL-LHC and beyond. We report about the technology transfer, the RPC prototype production at the selected companies and the results of the certification procedure.
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