August 27, 2017 to September 1, 2017
RAI Congress Center, Amsterdam, The Netherlands
Europe/Amsterdam timezone

Geometric field errors of Short Models for MQXF, the Nb3Sn low-beta Quadrupole for the High Luminosity LHC

Aug 30, 2017, 3:45 PM


Regular 15 minutes Oral Presentation A1 - Superconducting Accelerator Magnets Wed-Af-Or23


Susana Izquierdo Bermudez (CERN)


In the framework of the High-Luminosity upgrade of the Large Hadron Collider, the US LARP collaboration and CERN are jointly developing a 150 mm aperture Nb3Sn quadrupole for the LHC interaction regions. Due to the large beam size and orbit displacement in the final focusing triplet, MQXF has challenging targets for field quality at nominal operation conditions. Three short model magnets have been tested and around thirty coils have been built, allowing a first analysis of the reproducibility of the coil size and turns positioning. The impact of the coil shimming on field quality is evaluated, with special emphasis on the warm magnetic measurements and the correlation to magnetic field measurements in operation conditions. The variability of the field harmonics along the magnet axis is studied by means of a Monte-Carlo analysis and the effects of the corrective actions implemented to suppress the low order un-allowed multipoles are discussed.

Submitters Country SWITZERLAND

Primary authors

Susana Izquierdo Bermudez (CERN) Giorgio Ambrosio (Fermilab) Hugo Bajas (CERN) Guram Chlachidze (Fermilab) Paolo Ferracin (CERN) Lucio Fiscarelli (CERN) Joseph DiMarco (Fermi National Accelerator Laboratory) Ezio Todesco (CERN) GianLuca Sabbi (LBNL) Giorgio Vallone (CERN) Xiaorong Wang (Lawrence Berkeley National Laboratory)

Presentation materials