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Title: Geometric Field Errors of Short Models for MQXF, the Nb3Sn Low-β Quadrupole for the High Luminosity LHC

Abstract

© 2002-2011 IEEE. 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.

Authors:
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Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1563950
DOE Contract Number:  
AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Applied Superconductivity
Additional Journal Information:
Journal Volume: 28; Journal Issue: 3; Journal ID: ISSN 1051-8223
Country of Publication:
United States
Language:
English

Citation Formats

Bermudez, Susana Izquierdo, Ambrosio, Giorgio, Bajas, Hugues, Chlachidze, Guram, Troitino, Jose Ferradas, Ferracin, Paolo, Fiscarelli, Lucio, Hagen, Per, Holik, Eddie Frank, Marco, Joseph Di, Stoynev, Stoyan Emilov, Todesco, Ezio, Sabbi, Gianluca, Vallone, Giorgio, and Wang, Xiaorong. Geometric Field Errors of Short Models for MQXF, the Nb3Sn Low-β Quadrupole for the High Luminosity LHC. United States: N. p., 2018. Web. doi:10.1109/tasc.2018.2793240.
Bermudez, Susana Izquierdo, Ambrosio, Giorgio, Bajas, Hugues, Chlachidze, Guram, Troitino, Jose Ferradas, Ferracin, Paolo, Fiscarelli, Lucio, Hagen, Per, Holik, Eddie Frank, Marco, Joseph Di, Stoynev, Stoyan Emilov, Todesco, Ezio, Sabbi, Gianluca, Vallone, Giorgio, & Wang, Xiaorong. Geometric Field Errors of Short Models for MQXF, the Nb3Sn Low-β Quadrupole for the High Luminosity LHC. United States. doi:10.1109/tasc.2018.2793240.
Bermudez, Susana Izquierdo, Ambrosio, Giorgio, Bajas, Hugues, Chlachidze, Guram, Troitino, Jose Ferradas, Ferracin, Paolo, Fiscarelli, Lucio, Hagen, Per, Holik, Eddie Frank, Marco, Joseph Di, Stoynev, Stoyan Emilov, Todesco, Ezio, Sabbi, Gianluca, Vallone, Giorgio, and Wang, Xiaorong. Sun . "Geometric Field Errors of Short Models for MQXF, the Nb3Sn Low-β Quadrupole for the High Luminosity LHC". United States. doi:10.1109/tasc.2018.2793240.
@article{osti_1563950,
title = {Geometric Field Errors of Short Models for MQXF, the Nb3Sn Low-β Quadrupole for the High Luminosity LHC},
author = {Bermudez, Susana Izquierdo and Ambrosio, Giorgio and Bajas, Hugues and Chlachidze, Guram and Troitino, Jose Ferradas and Ferracin, Paolo and Fiscarelli, Lucio and Hagen, Per and Holik, Eddie Frank and Marco, Joseph Di and Stoynev, Stoyan Emilov and Todesco, Ezio and Sabbi, Gianluca and Vallone, Giorgio and Wang, Xiaorong},
abstractNote = {© 2002-2011 IEEE. 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.},
doi = {10.1109/tasc.2018.2793240},
journal = {IEEE Transactions on Applied Superconductivity},
issn = {1051-8223},
number = 3,
volume = 28,
place = {United States},
year = {2018},
month = {4}
}