Demonstrator System Testing and Performance for the ATLAS ITk Pixel Detector for HL-LHC

TL;DR

This paper presents the development and testing of a demonstrator system for the ATLAS ITk pixel detector, focusing on system robustness, performance, and new component integration for HL-LHC conditions.

Contribution

It introduces a comprehensive demonstrator system with advanced technologies and tests, advancing readiness for the ATLAS ITk detector at HL-LHC.

Findings

Successful system-level testing of serial powering and data acquisition

Verification of new silicon sensor technologies and lightweight structures

Enhanced understanding of detector component performance under HL-LHC conditions

Abstract

A demonstrator for each slice of the ATLAS pixel detector was built to replicate the real detector and provide early solutions for operating and maintaining its components. This system-level testing of the all-silicon Inner Tracker (ITk) pixel detector for the ATLAS experiment at CERN's HL LHC encompasses a wide array of system components, which is essential for managing the increased luminosity and radiation levels expected at HL LHC, thereby enhancing tracking performance. Utilizing advanced silicon sensor technologies, serial powering, and lightweight carbon fiber structures, the demonstrator and assembled components on the support structure will undergo several studies for verification and commissioning. Extensive tests on serial powering, monitoring, and data acquisition were conducted, ensuring the system's robustness and reliability for future high-energy physics experiments. Additionally, three different sub-components will be introduced for the novel ITk pixel detector, specifically designed for the outer barrel (OB), outer end caps (OEC), and inner system (IS) sections.