Geometric Field Errors of Short Models for MQXF, the Nb3Sn Low-β Quadrupole for the High Luminosity LHC
| Autor: | Stoyan Stoynev, Eddie Frank Holik, Lucio Fiscarelli, GianLuca Sabbi, Joseph Di Marco, Per Espen Hagen, Ezio Todesco, Hugues Bajas, Susana Izquierdo Bermudez, Paolo Ferracin, Jose Ferradas Troitino, Xiaorong Wang, Guram Chlachidze, Giorgio Vallone, Giorgio Ambrosio |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
General Physics Large Hadron Collider Field (physics) High luminosity large hadron collider 010308 nuclear & particles physics Aperture field quality Materials Engineering Superconducting magnet Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Nuclear physics Electromagnetic coil magnetic measurements Harmonics Magnet 0103 physical sciences Quadrupole Electrical and Electronic Engineering 010306 general physics high field Nb3Sn magnet |
| Zdroj: | IEEE Transactions on Applied Superconductivity, vol 28, iss 3 |
| ISSN: | 1558-2515 1051-8223 |
| Popis: | In the framework of the high-luminosity upgrade of the large hadron collider, the U.S. LARP collaboration and CERN are jointly developing a 150-mm aperture Nb3Sn quadrupole for the Large Hadron Collider (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 30 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 field measurements at cold and nominal field. 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 unallowed multipoles are discussed. |
| Databáze: | OpenAIRE |
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