Speaker
Description
The High-Luminosity Large Hadron Collider is set to come online in 2030, producing more than three times the data than its current rate. As such, the ATLAS detector will need to replace its Inner Detector with the Inner Tracker, a full-silicon system. Canada is responsible for building and testing 22% of the strip end-cap subdetector, due to be installed at CERN in 2028.
In 2024, as the production phase was scheduled to begin, the ATLAS Inner Tracker discovered a major reliability problem, where a discrepancy in material coefficients led to cracked sensors when cooled down to operating temperatures. The following analysis, based on experimental and simulated data, yielded two possible solutions: a major design change providing a large safety margin and a minor design change providing a smaller safety margin. In early 2025, due to time constraints and low availability of prototypes, decisions were made based on a limited data set. Now, a year later, multiple parts have been assembled and more information is available.
This talk will outline the two approaches under consideration, the decision process used to choose a final design and how the situation has evolved since then.
| Keyword-1 | atlas |
|---|---|
| Keyword-2 | itk |
| Keyword-3 | particle physics |