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T: Fachverband Teilchenphysik

T 43: Poster session Particle Physics

T 43.4: Poster

Dienstag, 31. März 2020, 17:00–18:30, Grotte

Characterization and quality control methods of petal cores for the ATLAS ITk strip detector end-caps — •Jan-Hendrik Arling — Deutsches Elektronen-Synchrotron DESY, ATLAS group, Hamburg — TU Dortmund, Lehrstuhl für Experimentelle Physik IV, Dortmund

For the high-luminosity LHC, ATLAS will replace its tracking detector by a new, all-silicon tracker, called Inner Tracker (ITk). This is necessary due to the challenging environments in terms of a factor ten higher radiation levels as well as a higher number of proton-proton interactions per bunch crossing (called pile-up). The forward regions of the detector will host the end-caps, structures with disks populated with so-called petals. On the one hand, a petal consists of a core, made of a carbon fiber-based sandwich structure with embedded titanium cooling pipes as well as data and power buses on the surfaces. On the other hand, the silicon modules, assembled out of micro-strip sensors together with readout and power electronics, are directly glued on the core surfaces. The focus of this poster is on the petal core and its requirements in terms of mechanical and thermal properties (e.g. surface flatness and thermal conductance). During production it is necessary to control the quality by dedicated test measurements, but also before in the design phase an extensive verification process took place. The results of the test measurements (e.g. measurement of thermal deformation and cycling) on the recent produced prototype structures shows the ITk requirements fulfilled. The implementation of the tests in the production phase for quality control will be the next step.