Münster 2017 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 35: HK+T Joint Session V: Silicon Strip Detectors

HK 35.4: Talk

Wednesday, March 29, 2017, 17:30–17:45, F 102

Test-beam results of an unirradiated and an irradiated module for the ATLAS ITk Strip detector — •Edoardo Rossi — DESY, Hamburg, Germany

Starting in 2022, the LHC will be upgraded to the High Luminosity-LHC which will have a luminosity almost five times larger than the present luminosity. In order to cope with the higher radiation level and with the higher pile up, the ATLAS experiment needs a complete replacement of the current tracking system with an all silicon detector, the Inner Tracker (ITk).

The ITk strip detector will be subject to a radiation more than one order of magnitude higher than the maximum radiation fluence expected for the SCT, the current strip detector. For this reason, new radiation-hard sensors and front-end chips will be used and are now under development. Among other measurements, a test-beam campaign is on going to determine the performance of the new modules at the end of the lifetime of the HL-LHC. Some strict requirements are set on the performance to provide efficient pattern recognition and track reconstruction and to fulfill the needs of the physics program.

In this presentation, test-beam results obtained with unirradiated and proton-irradiated prototype barrel modules are compared. The measurements were performed at DESY and CERN. The main focus is on the degradation of the efficiency, collected charge and noise occupancy after irradiation.