Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 38: Instrumentation und Anwendungen
HK 38.3: Vortrag
Mittwoch, 14. März 2007, 17:30–17:45, B
A Triple-GEM Detector with Pixel Readout for High-Rate Beam Tracking — Florian Haas, Bernhard Ketzer, Igor Konorov, Alexander Mann, •Thiemo Nagel, and Stephan Paul — Physik Department, Technische Universität München, D-85748 Garching
For its physics program with a high-intensity hadron beam of 2·107 particles/s, the COMPASS experiment at CERN needs to track charged particles scattered by very small angles with respect to the incident beam. While good resolution in time and space is mandatory, the high beam intensity imposes a special challenge, requiring radiation hard detectors that are fitting a tight material budget in order to minimise secondary interactions.
To this end, a set of triple-GEM detectors with pixel readout in the beam
region and 2-D strip readout in the periphery is being built. The pixel size
has been chosen to be 1×1 mm2, compromising between
spatial resolution and the number of readout channels. Peripheral to the pixel
area, a 2-D strip readout with a pitch of 400 µm has been
realised on the same printed circuit. In total an active area of
10×10 cm2 is covered using 2048 readout channels.
An analogue readout via the APV25-S1 ASIC has been chosen to profit
from amplitude correlations for clustering. A detector prototype has been
tested successfully in the COMPASS muon beam and in a focused hadron beam,
both at a flux density of
∼105 particles/mm2/s.
The design of the detector and
first results concerning its performance as a beam tracker will be presented.
— Supported by: Maier-Leibnitz-Labor der TU und LMU München