Münster 2017 – wissenschaftliches Programm
T 117.4: Vortrag
Donnerstag, 30. März 2017, 17:35–17:50, VSH 06
Effects of humidity on the gas gain in MicroMegas detectors — •Thorwald Klapdor-Kleingrothaus, Stephanie Zimmermann, and Ulrich Landgraf — Universität Freiburg
The Micro Mesh Gaseous Detectors (MicroMegas, MM) are planar and high-rate capable detectors with a very good spatial resolution. In the recent years the MM technology was intensively studied in view of replacing the innermost station of the ATLAS endcap muon spectrometer in the next long LHC shutdown in 2019/20 by a new detector assembly known as the New Small Wheel (NSW) Upgrade. The two New Small Wheels will use the MicroMegas technology as well as sTGC's for triggering and track reconstruction. In this context small MicroMegas prototypes (10x10cm) were developed, to study their performance and their behavior. The presented work uses a cosmic muon test setup with two of these prototypes in combination with a scalable readout system. Influences on the detector performance caused by variations in the pressure of the operation gas or by changes in the humidity at the low ppm level are investigated. These parameters will impact the later design of detector slow control system at the New Small Wheel in ATLAS. The results of the first measurements and corresponding simulation studies are presented.