Speaker
Description
The ATLAS Inner Tracker (ITk) of the phase-II upgrade of the current
ATLAS tracking detector and is designed to meet the challenges at the high-
luminosity LHC. The ITk silicon strip end-caps will cover the forward directions
of the detector and consist of six disks populated with wedge-shaped silicon
micro-strip sensors, divided in modules containing the readout, power and con-
trol electronics. The modules are directly glued on likewise wedge-shaped local
support structures called petal cores, consisting of carbon fiber-based sandwich
structures with embedded titanium cooling pipes as well as data and power
buses. The petals are the fully loaded structures with in total 18 sensor mod-
ules in six different shapes and each end-cap disk will be constituted of 32
instances, requiring overall 384 petals.
After finalizing in most areas the R&D phase of the ITk strip detector, the
project is in the transition phase towards production. In the currently ongoing
pre-production, the multi-stage assembly process of the various components is
trained, the worldwide distributed construction sites are quali?ed for produc-
tion and the complex logistics chain is validated.
In this contribution, an overview of the production preparations of the petal
cores up to the loaded petal at DESY will be given. The production chain
starts with the machining of components for the petal core, goes on with the
actual core assembly by an industry partner and the following quality control
tests performed on the local support structures before being ready for module-
on-core loading to have the final petal object.
