Hamburg 2016 – scientific programme

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T: Fachverband Teilchenphysik

T 8: Myondetektoren I

T 8.6: Talk

Monday, February 29, 2016, 12:15–12:30, VMP6 HS E

Study of APV preamplifier circuits for Micromegas detectors — •Quirin Steinbacher, Otmar Biebel, Jonathan Bortfeldt, Ralf Hertenberger, Philipp Lösel, Ralph Müller, and André Zibell — LMU München

Micromegas detectors are high-rate capable planar gaseous particle detectors with micro structured readout-anodes. The electronic signals are often read out using the analogue frontend chip APV25. An APV25 chip amplifies, buffers in a pipeline and multiplexes 128 analogue output channels on a single analogue output channel which is subsequently digitized by an ADC. A quantitative analysis of data enables the study of potential signal distortion as signal induced global baseline shifts or signal induced cross talk. The combination of two APVs into a pair of master and slave leads to different phases in the transmitted signal which affects the subsequent digitization. Possible signal corrections are deduced and tested for improvement of spatial resolution on experimental data acquired at the Garching Tandem accelerator and the LMU cosmic ray facility.