PoS - Proceedings of Science
Volume 390 - 40th International Conference on High Energy physics (ICHEP2020) - Parallel: Detectors for Future Facilities (incl. HL-LHC), R&D, Novel Techniques
A Novel Two-Dimensional Readout Design for Floating Strip Micromegas Detectors
F.F. Klitzner,* O. Biebel, J.F. Bortfeldt, B. Flierl, M. Herrmann, R. Hertenberger
*corresponding author
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Pre-published on: February 22, 2021
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Floating strip Micromegas detectors are high-rate capable particle detectors with excellent spatial and time resolution, allowing single particle tracking with fluxes up to at least 7 MHz/cm$^2$. The amplified ionization charge is collected on copper anode strips kept at a slightly floating electrical potential. The charge signal is coupled to two layers of perpendicular readout strips in x and y, insulated by thin Kapton layers. A complete understanding of the signal formation in the detector, particularly on the orthogonal y-strips, is achieved: simulations disentangle the signal coupling due to alternating weighting field lines with respect to the ion velocity vector and the response of charge sensitive front-end electronics. Different two-dimensional anode designs with optimized strip geometry have been developed based on the simulations. We present the performance of the detector for the different designs measured in 20 MeV proton/neutron and 180 GeV pion/muon beams, using APV25 front-end electronics.
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