# VCI2016 - The 14th Vienna Conference on Instrumentation

Feb 15 – 19, 2016
Vienna University of Technology
Europe/Vienna timezone

## Performance studies of resistive Micromegas detectors for the upgrade of the ATLAS Muon Spectrometer

Feb 18, 2016, 9:25 AM
20m
EI9 (Vienna University of Technology)

### EI9

#### Vienna University of Technology

Gusshausstraße 27-29, 1040 Wien
Talk Gaseous Detectors

### Speaker

Fabian Kuger (Bayerische Julius Max. Universitaet Wuerzburg (DE))

### Description

Resistive Micromegas (Micro MEsh Gaseous Structure) detectors have proven along the years to be a reliable high rate capable detector technology characterised by an excellent spatial resolution. The ATLAS collaboration has chosen the resistive Micromegas technology (mainly for tracking), along with the small-strip Thin Gap Chambers (sTGC, mainly for triggering), for the phase-1 upgrade of the inner muon station in the high-rapidity region, the so called New Small Wheel (NSW). The NSW requires fully efficient Micromegas chambers with spatial resolution better than 100$\mu$m independent of the track incidence angle and the magnetic field (B<0.3T), with a rate capability up to ~10kHz/cm$^2$. Along with the precise tracking the Micromegas chambers should be able to provide a trigger signal, complementary to the sTGC, thus a decent timing resolution is required. Several tests have been performed on small (10x10cm$^2$) and medium size (1x0.5m$^2$) resistive Micromegas chambers (bulk type and mechanical floating mesh type) using medium (10GeV/c) and high (150GeV/c) momentum hadron beams at CERN including measurements inside magnetic field. Results on the measured efficiency, position and timing resolution will be shown demonstrating the excellent characteristics of the detectors that fulfill the NSW requirements. In addition, early test results from the first full size (2-3m$^2$) operational modules that will be realised during 2015, will be presented.

### Primary author

Fabian Kuger (Bayerische Julius Max. Universitaet Wuerzburg (DE))