Speaker
Description
High-precision and efficient magnet referencing is required for the series
fiducialization of the large number of multipole magnets for PETRA IV.
To meet the required precision while keeping the measurement process suitable for series production,
a high degree of automation is necessary.
Two concepts for relating external magnet fiducials to the magnetic axis
measured with a vibrating stretched wire were investigated:
a photogrammetry-based approach and a laser tracker-based approach.
This work presents experimental investigations of both concepts using
prototype measurement setups. The photogrammetry approach is evaluated using
rotary stages as V-STARS feature targets, while the laser tracker approach
is tested with different target configurations, including Super CatEye
prism. Particular attention is given to the achievable measurement
precision, repeatability, robustness, and practical implementation of the
measurement procedures. The results of both approaches are compared with
respect to their suitability for an automated series fiducialization process
for PETRA IV magnets. Based on this comparison, the selected referencing
concept and the considerations leading to this decision are presented.
