Assembly and Power Tests of the Long Orbit Nested Corrector Prototype for HL-LHC

MCBXFA magnets are long orbit nested correctors for the high luminosity upgrade of the LHC. They are the 2.5 m long version of the short orbit correctors MCBXFB, sharing the same cross-section. The components of the first prototype MCBXFAP1 have been produced by CIEMAT. The magnet was assembled in collaboration with CERN at its facilities (927 laboratory). This article depicts in first place the assembly steps of MCBXFAP1, which required the fabrication of custom tooling and faced some difficulties, mainly caused by the additional length compared to the short corrector. Shimming plan and magnet length adjustment are reported. After that, the powering test results at the CERN test station (SM-18) and the magnetic measurements campaign are presented.