Production and Integration of the ATLAS Insertable B-Layer

TL;DR

The paper details the design, construction, and integration of the Insertable B-Layer (IBL) for the ATLAS detector at CERN, enhancing tracking performance in high-radiation environments post-2013 shutdown.

Contribution

It introduces the new radiation-tolerant sensor and electronic technologies used in the IBL and describes its successful integration into the ATLAS detector.

Findings

IBL installation was completed successfully.

The IBL improved tracking robustness under high luminosity.

Radiation-tolerant technologies proved effective in the collider environment.

Abstract

During the shutdown of the CERN Large Hadron Collider in 2013-2014, an additional pixel layer was installed between the existing Pixel detector of the ATLAS experiment and a new, smaller radius beam pipe. The motivation for this new pixel layer, the Insertable B-Layer (IBL), was to maintain or improve the robustness and performance of the ATLAS tracking system, given the higher instantaneous and integrated luminosities realised following the shutdown. Because of the extreme radiation and collision rate environment, several new radiation-tolerant sensor and electronic technologies were utilised for this layer. This paper reports on the IBL construction and integration prior to its operation in the ATLAS detector.