Analysis of GEM Properties and Development of a GEM Support Structure for the ILD Time Projection Chamber

TL;DRAbstract

In the concept of the International Large Detector (ILD), developed for the International Linear Collider (ILC) a Time Projection Chamber (TPC) is envisaged as main tracking detector.Such gaseous detectors have to be equipped with amplification devices in order to enlargethe amount of charge, which is set free by ionization caused by traversing charged particles.Micro Pattern Gas Detectors (MPGDs) will be used in the ILD TPC as amplification stage. Inthis thesis, Gas Electron Multipliers (GEMs) – one specific MPGD species – are analyzed concerning various properties. Effective gains and energy resolutions are compared for GEM foilsproduced by different manufacturers. A good understanding of these observables is obtainedby interpretation of the results with the help of geometrical parameters. Height profile measurements of GEM foils have been performed for the first time and the impact of non perfectflat GEMs is analyzed, especially on dE/dx determination and drift field quality. The re

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