Bonn 2020 – wissenschaftliches Programm
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HK 51.13: Poster
Donnerstag, 2. April 2020, 16:30–18:30, Zelt
New GEM Detectors for COMPASS/COMPASS++ — Emorfili Terzimpasoglou1, •Karl Jonathan Flöthner1, Dimitri Schaab1, Christian Honisch1, Igor Konorov2, Markus Ball1, and Bernhard Ketzer1 — 1Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, Bonn, Germany — 2Technische Universität München, E18, München, Germany
The COmmon Muon Proton Apparatus for Structure and Spectroscopy (COMPASS) came into operation in 2001 and is one of the longest running experiments at CERN. Its phase II is scheduled to be completed in 2021 with a measurement of transverse-momentum dependent PDFs in deep inelastic scattering of muons on a deuterium target. A new proposal for a future QCD facility at the M2 beamline has been submitted recently. Running under the name COMPASS++/AMBER, the plans include, among others, a measurement of the proton radius in elastic muon-proton scattering and studies of the pion PDFs using the Drell-Yan process. The upcoming experiments require an upgrade of the existing GEM tracking system. In the long run, new large-size GEM detectors with pixel readout in the central region are planned. In addition, the front-end electronics should allow for a self-triggered readout of signal channels. As a first step, an improved version of medium-size GEM detectors will be constructed in order to replace some of the existing detectors. The poster will report on the design of these detectors and on studies comparing the existing APV25 front-end chip with the new VMM-3 ASIC. Supported by BMBF.