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Readout and Precision Calibration of Square Meter Sized Micromegas Detectors Using the Munich Cosmic Ray Facility

  • Andre Zibell
  • Philipp Lösel
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 213)

Abstract

Currently m\(^2\) large Micromegas detectors with a spatial resolution better than 100 \(\upmu \)m are of big interest for many experiments and applications. The combination of large size and excellent spatial resolution requires highly sophisticated construction methods in order to fulfil tight mechanical tolerances.

We present a method to survey full sized micromegas detectors on potential detector deformations or deviations of the internal micro pattern structure from design values by comparing to precision reference tracking of cosmic muons.

The LMU Cosmic Ray Facility consists of two about 8 m\(^2\) ATLAS MDT (monitored drift tube) chambers for precision muon reference tracking, as well as two segmented trigger hodoscopes for position information in the order of 10 cm along the wires of the MDTs with sub-ns time resolution. The angular acceptance for cosmic muons is ±30\(^{\circ }\) and its mechanical layout allows the installation of one or multiple Micromegas detectors in between the MDT reference chambers. Track segments reconstructed in all systems can be compared, allowing a full scan for efficiency homogenity, pulse height, single plane angular resolution and spatial resolution, also as function of multiple scattering.

In addition to results on the performance of large resistive strip Micromegas detectors we report on the synchronized electronic readout system, based on standard MDT electronics, together with custom electronics and firmware, based on the Scalable Readout System.

References

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Copyright information

© Springer Nature Singapore Pte Ltd.  2018

Authors and Affiliations

  1. 1.Julius-Maximilians-Universität WürzburgWürzburgGermany
  2. 2.Ludwig-Maximilians-Universität MünchenGarchingGermany

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