Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 90: Muon detectors

T 90.7: Talk

Thursday, March 18, 2021, 17:35–17:50, To

Alignment reconstruction of Micromegas quadruplets — •Fabian Vogel, Otmar Biebel, Maximilian Herrmann, Ralf Hertenberger, Christoph Jagfeld, Felix Klitzner, Katrin Penski, Maximilian Rinnagel, and Chrysostomos Valderanis — LMU München

For the upcoming New Small Wheel upgrade of the ATLAS detector Micromegas quadruplets will be implemented as muon tracking detectors. These gaseous detectors are optimized for the detection of minimum ionizing particles. They contain a metallic micromesh to divide the gas volume into a drift and an amplification region. The anode on the bottom of the detector contains parallel readout strips on a printed circuit board (PCB) for one dimensional readout. Each of the four detector layers is built from three individual PCBs glued side-by-side on either side of the readout panel. The alignment of a quadruplet made from two readout panels with four layers of PCBs, for each individual layer, as well as the alignment of these layers with respect to each other is investigated. Studies of those quadruplets in the cosmic ray facility of the LMU are compared to optical precision inspections using dedicated markers on the PCBs. New measuring techniques have been developed and integrated in the series production of the modules. Results of the comparison will be presented.