Szczegóły publikacji

The ATLAS Forward Proton (AFP) detectors open new possibilities to expand the reach of the ATLAS Experiment physics and to probe unique physics processes by measuring intact protons produced in diffractive or photon-induced processes. The AFP system uses Roman pots located approximately 210 meters from the ATLAS interaction point on both outgoing beams. These devices enable measurements in the vicinity of the LHC beam. Each AFP station contains a tracking detector, consisting of four planes of silicon pixel sensors. The present study focuses on the alignment of the AFP detector, a critical process to ensure the highest accuracy in proton measurements. Local alignment, the first step in this process, concentrates on accurately determining the relative positions of the pixel planes. Subsequently, global alignment is dedicated to determining the overall position of the AFP detector relative to the beam.