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HK: Fachverband Physik der Hadronen und Kerne

HK 27: Poster

HK 27.62: Poster

Dienstag, 28. März 2017, 16:45–18:45, F Foyer

Development and Detector Characterization of COBRA GEMs — •Thomas Klemenz — TU München, Physik Department E62, Excellence Cluster ’Universe’, Garching

The requirements of the next generation experiments in particle physics are the driving factors for the development of new technologies. Detectors have to handle harsh radiation in high luminosity environments providing stability at high read out rate. In Time Projection Chamber (TPC) detectors, in addition, a low ion back flow (IBF) is needed not to introduce distortion of the drift field. Multi Wire Proportional Chambers (MWPCs), commonly used as read out for the TPC, provide IBF suppression by introducing a gating grid. Because of its limited read out rate, however, the MWPC is now being gradually replaced. Instead, Gas Electron Multiplier (GEM) foils are being used since they provide continuous operation due to the intrinsic IBF suppression. A new type of GEM, the COBRA GEM, was proposed, which may provide a further reduction of the IBF. By implementing ring-like electrodes around the GEM holes, yet another degree of freedom for controlling the IBF is provided.

We report on the effective gain and IBF suppression measurements with a single thick COBRA GEM as a function of various HV settings.

This research was supported by the DFG cluster of excellence ’Origin and Structure of the Universe’.