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HK: Fachverband Physik der Hadronen und Kerne

HK 52: Poster

HK 52.50: Poster

Donnerstag, 1. März 2018, 16:30–18:45, Audimax Foyer

GEM Tracking Detectors for the NA64 Experiment at CERN — •Michael Hösgen, Markus Ball, and Bernhard Ketzer — Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, Bonn, Germany

The NA64 experiment conducts rare–event searches at the SPS of CERN. The poster will present the triple GEM tracking detectors with 2D strip readout that are part of the beam spectrometer of the NA64 experiment.

In 2016 and 2017 separate dedicated searches for two mediators between standard model and dark sector, a new light vector boson A’ and a new short-lived neutral boson X, were performed. The event selection process of both searches includes the clean identification of the incident 100 GeV beam electrons, which is achieved with a magnetic spectrometer. As tracking detectors 8×8 cm² Micromegas and 10×10 cm² triple Gas Electron Multiplier (GEM) detectors are used.

I document the manufacturing of two GEM detectors starting from the design, to the production and quality assurance of the components and the calibration of the full detectors. I will present the performance at the SPS at CERN and discuss possible improvements.