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Experimental Particle and Astro-Particle Physics Seminar
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Europe/Zurich
Description
Abstract:
To exploit the collider's full potential, the LHC will be upgraded to the High Luminosity-LHC. The instantaneous luminosity will increase five- to sevenfold from luminosities achieved during LHC Run 3. To cope with the resulting increase in occupancy, bandwidth and radiation damage, ATLAS will replace the Inner Detector with an all-silicon system, the Inner Tracker (ITk). The innermost part of the ITk will consist of a hybrid pixel detector with five layers that will consist of modules combined into serially powered (SP) chains and loaded on ring and stave shaped low mass carbon fiber local supports (LLS).
Validating this design requires rigorous system tests using prototypes. One such system test was conducted using the demonstrator for the Outer Barrel (OB) region. A prototype longeron LLS was intensively tested at CERN and its performance evaluated. In this talk I will detail the design of the ITk Pixel detector and present selected results of the demonstrator system tests, which validate the overall system design for the OB region.
Following successful validation, the project has entered the preproduction phase for LLSs and the community is preparing a system test with preproduction detector hardware. This system test will support the validation of the production process but also provide an opportunity to be used as a test stand for the development of the software for the Detector Control System (DCS) of the final Pixel detector.
A first version of a sophisticated DCS has been developed in which the operational model of the detector was translated into the state model of a Finite State Machine (FSM) to ensure safe operation. This control system is used for the Quality Control (QC) tests of (pre-)production LLSs.
I will present selected aspects of the developed DCS to show how a complex detector can be operated consistently and safely.
