Erlangen 2026 – scientific programme

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T: Fachverband Teilchenphysik

T 95: Gaseous Detectors III

T 95.2: Talk

Friday, March 20, 2026, 09:15–09:30, KH 01.014

Implementation of 2nd coordinate measurement for 3D tracking with Drift Tube Chambers — •Nick Meier, Julia Okfen, and Oliver Kortner — Max-Planck-Institute for Physics, Garching, Germany

This work investigates the implementation of a second coordinate measurement in drift-tube detectors to enable full 3D hit reconstruction in drift tube chambers. Two concepts are studied: the Twin-Tube configuration, where signals are looped through paired tubes, and a Double-Sided Readout with independent readout on both ends. For ATLAS muon drift-tube (MDT) chambers, measurements of signal propagation and attenuation allow reconstruction of the hit position along the wire. Using the signal propagation delay measurement, a second coordinate resolution of approximately 200 mm is achieved at various tube lengths. A second-coordinate measurement efficiency exceeding 96% can be achieved under HL-LHC background conditions. For small diameter muon drift-tube (sMDT) chambers, resolutions between 100-140 mm are obtained at the different positions along the tube, reaching  95 mm for a 100 GeV muon beam and  52 mm when combining the information of four tubes. The utilization of the second coordinate for the rejection of γ background hits in track reconstruction will also be discussed in the presentation. Overall, the results demonstrate that a second coordinate can be integrated into gaseous drift-tube detectors with high efficiency, providing a promising option for future high γ background rates as expected for the muon systems at the HL-LHC and the FCC.

Keywords: Drift Tube Chamber; HL-LHC; FCC; ATLAS; High Rate