Speaker
Description
Straw Trackers are widely used in various High Energy Physics experiments. There are two main straw production technologies – the straw winding and the ultrasonic welding. While the winding technology exists for a long time and there are industrially available producers, the ultrasonic welding process has reached the required quality relatively recently.
A large scale Straw Tracker build of straws produced with the ultrasonic welding is a part of the NA62 detector and operates in vacuum for more than 10 years. Its extremely good performance and operation stability makes this technology attractive for the future experiments as well.
Welded straws have a large dynamic range of elastic deformation of the material. This allows large area trackers to be built without additional engineering techniques increasing the tracker stability, like straw reinforcement in ATLAS TRT, or introducing self-supporting structures in the Panda tracker. In case of welded straw, the stable tracker geometry is maintained by the tension of straw tubes.
Improved welding process and developed quality control of produced straws makes the welding technique attractive for building Straw Trackers of large area, low material budget, high performance and reliable long-term operation stability. Straw welding technology is considered for Straw Trackers of future experiments like SHiP, DUNE, FCCee and SPD.
We overview details of the ultrasonic welding straw production technology, compare requirements to Straw Trackers at several future experiments, and present first prototypes made of the welded straws.
| Position | Team leader of Straw detector group |
|---|---|
| Affiliation | JINR |
| Country | JINR |