Speaker
Description
In order to cope with the harsh conditions at the High-Luminosity LHC, the ATLAS experiment will replace its inner tracking system with a new, all-silicon inner tracker (ITk) during LHC long-shutdown 3. The core of ITk is a 5-layer hybrid pixel detector. This new pixel detector will feature a sensitive surface of about 13m$^2$ and employ several different silicon sensor technologies as well as innovative new technologies like serial detector powering and evaporative CO2 cooling to unprecedented scales. All detector components went through substantial R&D programs and optimization efforts which have been concluded by now and most of them are currently being produced for the final detector system.
In order to ensure the successful interplay of all the components in the final detector, system level tests are being carried out as an essential part of the evolved testing program of the ITk pixel detector. This presentation will highlight some of the recent system test efforts:
A large serial powering chain made of 14 modules has been set up. This size corresponds to the largest serial powering chain in the detector. It has been connected using a fully realistic off-detector infrastructure including correctly dimensioned cables, patch-panels, and detector power supplies. This unique setup gives outstanding possibilities to validate the serial powering concept, cold detector start-up behavior and power supply performance under the most realistic conditions so far.
In another system test, multiple local support structure with in total 54 modules were operated together for the first time in order to validate the detector grounding scheme and to demonstrate the parallel operation of large detector pieces. Beyond that, it represents a long-term test environment for the infrastructure needed for the operation of the final detector system, including the interlock system, environmental monitoring, data acquisition system as well as detector control system.
All the activities pave the road to a successful detector commissioning at the end of the production and give already a good understanding of the future operation of the ITk pixel detector.
| Position | Staff Scientist |
|---|---|
| Affiliation | CERN |
| Country | Switzerland |
