Würzburg 2018 – scientific programme
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T: Fachverband Teilchenphysik
T 14: Gasgefüllte Detektoren I
T 14.7: Talk
Monday, March 19, 2018, 17:35–17:50, Z6 - SR 2.002
Two-Dimensional Floating Strip Micromegas Detectors — •Felix Klitzner1, Otmar Biebel1, Jonathan Bortfeldt2, Bernhard Flierl1, Phillipp Lösel1, Ralph Müller1, Maximilian Herrmann1, Ralf Hertenberger1, and Chrysostomos Valderanis1 — 1Ludwig-Maximilans-Universität München — 2CERN
Floating strip Micromegas detectors are high-rate capable particle detectors with excellent spatial and temporal resolution, allowing single particle tracking for particle fluxes up to 7 MHz/cm2. A floating strip Micromegas detector collects the amplified ionization charge on copper anode strips with high ohmic contact to high voltage, so called floating strips. The charge signal is read out by readout strips, separated by a thin Kapton layer from the anode strips. This scheme makes the detector robust against discharges between the micro-mesh and the floating anode strips, induced by strongly ionizing particles. Different two-dimensional anode designs have been realized with two readout strip layers, parallel and perpendicular to the floating strips. Simulations have been set up to understand the signal formation and propagation to the front-end electronics, as different pulse shapes are observed on both strip layers. Measurements have been carried out with 20 MeV protons at beam intensities up to O(MHz). Position sensitive triggers were derived from a thin triple GEM detector placed in front of the Micromegas. We present results with respect to cluster reconstruction, efficiency and µTPC angle reconstruction of both layers for three different designs, recorded with APV25 front-end boards.