Full remote alignment system for the High-Luminosity Large Hadron Collider HL-LHC

The High Luminosity Large Hadron Collider (HL-LHC) is an upgrade of the LHC to achieve instantaneous luminosities, a factor five larger than the LHC nominal values. During the Long Shutdown 3, scheduled between 2026 and 2028, nearly 1.2 km of accelerator components will be replaced by new ones, relying on key innovative technologies. The Full Remote Alignment System (FRAS) is being developed to perform the remote alignment of these new HL-LHC components. FRAS will enhance the accelerator performance, decrease the required orbit corrector strengths, all of this while limiting the radiation doses for surveyors working in the tunnel, therefore allowing for more frequent alignment campaigns. Innovative solutions for the remote adjustment and position determination of the components are being qualified, including the internal monitoring of the position of cold mass and crab cavities inside their cryostat. This paper will provide a status of the systems under development and qualification, from the sensors and motor assemblies to the low level / high level acquisition and control/command systems and their corresponding software.