Conveners
Instrumentation III
- Helene Mainaud Durand (CERN)
The operational stability of large-scale particle accelerators—such as synchrotron light sources, and free-electron lasers—is fundamentally dependent on the sub-micron structural integrity and thermal stability of their components. However, the sprawling physical scale and extreme environments (high radiation, cryogenic temperatures, and electromagnetic interference) pose significant...
The 2028 installation phase of CERN's High-Luminosity Large Hadron Collider (HL-LHC) project will require precise positioning of hundreds of accelerator components and accompanying infrastructure within extremely tight integration tolerances. Floor tracing of reference marks is an important prerequisite for installation activities, providing the geometric references used by installation teams...
This study compares the vertical measurement accuracy of two Leica laser trackers: the AT500, which uses Orientation to Gravity (OTG), and the AT403, which provides continuous dual-axis compensation. Laboratory tests using a network of ten stations with a maximum baseline of 18 m showed that OTG correction produces vertical angle uncertainties of up to 0.4 arcsec, making single-instrument...
