Magnetic Analysis of the MQXF Quadrupole for the High-Luminosity LHC
| Autor: | Stoyan Stoynev, Lucio Fiscarelli, Hugues Bajas, Paolo Ferracin, GianLuca Sabbi, Joseph DiMarco, Ezio Todesco, Guram Chlachidze, Giorgio Vallone, Susana Izquierdo Bermudez, Giorgio Ambrosio |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
General Physics Large Hadron Collider Luminosity (scattering theory) Field (physics) Physics::Instrumentation and Detectors field quality Materials Engineering Superconducting magnet Condensed Matter Physics Accelerators and Storage Rings 01 natural sciences Electronic Optical and Magnetic Materials Nuclear physics magnetic measurements Harmonics Magnet 0103 physical sciences Quadrupole Physics::Accelerator Physics High luminosity LHC Electrical and Electronic Engineering 010306 general physics Quadrupole magnet high field Nb3Sn magnet |
| Zdroj: | IEEE Transactions on Applied Superconductivity, vol 29, iss 5 |
| ISSN: | 2378-7074 1051-8223 |
| Popis: | The high-luminosity upgrade of the large hadron collider (HL-LHC) requires new high-field and large-aperture quadrupole magnets for the low-beta inner triplets (MQXF). The US Hilumi-LHC Accelerator Upgrade (HL-LHC AUP) and CERN are jointly developing a 150 mm aperture Nb3Sn magnet. Due to the large beam size and orbit displacement in the final focusing triplet, MQXF has challenging field quality targets at collision energy. Magnetic measurements have been performed both at ambient and cryogenic temperatures in the four short models built and tested. This paper presents the magnetic analysis, comparing field measurements with the expectations and the field quality requirements. The analysis is focused on the geometrical harmonics and iron saturation effect, including three dimensional effects and transfer function repeatability. Persistent currents and dynamic effects are also discussed. The high-luminosity upgrade of the Large Hadron Collider (HL-LHC) requires new high-field and large-aperture quadrupole magnets for the low-beta inner triplets (MQXF). The U.S. HiLumi-LHC Accelerator Upgrade and CERN are jointly developing a 150-mm aperture Nb3Sn magnet. Due to the large beam size and orbit displacement in the final focusing triplet, MQXF has challenging field quality targets at collision energy. Magnetic measurements have been performed both at ambient and cryogenic temperatures in the four short models that were built and tested. This paper presents the magnetic analysis, comparing field measurements with the expectations and the field quality requirements. The analysis is focused on the geometrical harmonics and iron saturation effect, including three-dimensional effects and transfer function repeatability. Persistent currents and dynamic effects are also discussed. |
| Databáze: | OpenAIRE |
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