Construction of a large-size four plane micromegas detector

3 Jun 2014, 16:30
20m
Berlagezaal (Beurs van Berlage)

Berlagezaal

Beurs van Berlage

Oral Sensors: 1c) Gaseous Detectors I.c Gaseous

Speaker

Paolo Iengo (INFN Napoli (IT))

Description

In view of the use of micromegas detectors for the upgrade of the ATLAS muon system, we have constructed two detector quadruplets with an area of 0.5 m^2 per plane serving as prototypes for future ATLAS chambers. They are based on the resistive-strip technology and thus spark tolerant. The detectors were built in a modular way. The quadruplets consist of two double-sided readout panels with 128 µm high support pillars and three support (or drift) panels equipped with the micromesh and the drift electrode. The distance of the micromesh from the drift-electrode determines the drift (or conversion) gap. The panels are bolted together such that the detector can be opened and cleaned, if required. Each readout plane comprises 1024 strips with a pitch of 0.4 mm. Two of the readout planes are equipped with readout strips inclined by 1.5 degree. The quadruplet thus delivers track coordinates with a resolution of better than 100 µm in the precision coordinate and 1 mm in the second coordinate. We will present the detector concept, our experience with the detector construction, and the evaluation of the detectors with cosmic rays and x-rays. One of the quadruplets will be installed in ATLAS in summer 2014, equipped with the newly developed digital VMM readout chip.

Primary author

Paolo Iengo (INFN Napoli (IT))

Co-authors

Chrysostomos Valderanis (Johannes-Gutenberg-Universitaet Mainz (DE)) Fabian Kuger (Bayerische Julius Max. Universitaet Wuerzburg (DE)) Francisco Perez Gomez (CERN) Givi Sekhniaidze (Universita e INFN (IT)) Hans Danielsson (CERN) Joerg Wotschack (CERN) Matthias Schott (CERN) Michele Bianco (C) Rui De Oliveira (CERN) Tai-Hua Lin (Johannes-Gutenberg-Universitaet Mainz (DE))

Presentation Materials