Zusammenfassung
Summary
In the first quarter of 2015, the alignment of the dipole and quadrupole magnets as well as the beam-line between the cryostat modules of the superconducting Darmstadt linear electron accelerator (S-DALINAC) were surveyed by a mobile laser tracker AT401 (Leica). The collected data are used to reconstruct the trajectory of the beam and for planning modifications and extensions of the system. To analyse the observed data of the laser tracker, a spatial bundle adjustment is applied. To mitigate linearization errors, the unscented transformation is introduced for deriving the stochastic model during the network adjustment. To determine the orientation of the magnets, geometric primitives (planes, double-cylinders) are fitted.