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Title: Field Quality Measurement of a 4.2-m-Long Prototype Low- $$\beta$$ Nb $$_3$$ Sn Quadrupole Magnet During the Assembly Stage for the High-Luminosity LHC Accelerator Upgrade Project

Abstract

The U.S. High-Luminosity LHC Accelerator Upgrade Project, in collaboration with CERN, is developing Nb 3Sn quadrupole magnets (MQXFA) to be installed at the interaction region of the LHC. The project will deliver 20 MQXFA magnets in 10 cold masses. These magnets need to meet the stringent requirements on field quality at the nominal operating current. Compared to the mature NbTi accelerator magnet technology, achieving excellent field quality can be challenging for Nb 3Sn magnets. To help track, understand, and allow effective correction of geometric field errors, field quality measurements at room temperature during the MQXFA assembly stage was planned for the project. The measurements also intend to evaluate the magnetic axis and twist angle along the magnet aperture. We report the first measurement on a prototype MQXFA magnet using a recently developed measurement system. The magnetic axis and twist angle met the acceptance criteria. Further development needs for the room-temperature measurements were discussed. Here, we expect that statistics obtained from such measurements throughout the project will provide insight into future applications of high-performance Nb 3Sn accelerator magnets.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2];  [1];  [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1497669
Alternate Identifier(s):
OSTI ID: 1498556
Report Number(s):
FERMILAB-PUB-19-058-TD
Journal ID: ISSN 1051-8223; ark:/13030/qt6fb9v14s
Grant/Contract Number:  
AC02-05CH11231; AC02-07CH11359
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
IEEE Transactions on Applied Superconductivity
Additional Journal Information:
Journal Volume: 29; Journal Issue: 5; Journal ID: ISSN 1051-8223
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Nb $_3$ Sn accelerator magnets; field quality; High-Luminosity LHC Upgrade Project; 43 PARTICLE ACCELERATORS

Citation Formats

Wang, Xiaorong, Ambrosio, Giorgio F., Cheng, Daniel W., Chlachidze, Guram, DiMarco, Joseph, Ghiorso, William, Hernikl, Christopher, Lipton, Thomas M., Myers, Scott, Pan, Heng, Prestemon, Soren O., and Sabbi, GianLuca. Field Quality Measurement of a 4.2-m-Long Prototype Low- $\beta$ Nb $_3$ Sn Quadrupole Magnet During the Assembly Stage for the High-Luminosity LHC Accelerator Upgrade Project. United States: N. p., 2019. Web. doi:10.1109/TASC.2019.2892119.
Wang, Xiaorong, Ambrosio, Giorgio F., Cheng, Daniel W., Chlachidze, Guram, DiMarco, Joseph, Ghiorso, William, Hernikl, Christopher, Lipton, Thomas M., Myers, Scott, Pan, Heng, Prestemon, Soren O., & Sabbi, GianLuca. Field Quality Measurement of a 4.2-m-Long Prototype Low- $\beta$ Nb $_3$ Sn Quadrupole Magnet During the Assembly Stage for the High-Luminosity LHC Accelerator Upgrade Project. United States. doi:10.1109/TASC.2019.2892119.
Wang, Xiaorong, Ambrosio, Giorgio F., Cheng, Daniel W., Chlachidze, Guram, DiMarco, Joseph, Ghiorso, William, Hernikl, Christopher, Lipton, Thomas M., Myers, Scott, Pan, Heng, Prestemon, Soren O., and Sabbi, GianLuca. Fri . "Field Quality Measurement of a 4.2-m-Long Prototype Low- $\beta$ Nb $_3$ Sn Quadrupole Magnet During the Assembly Stage for the High-Luminosity LHC Accelerator Upgrade Project". United States. doi:10.1109/TASC.2019.2892119.
@article{osti_1497669,
title = {Field Quality Measurement of a 4.2-m-Long Prototype Low- $\beta$ Nb $_3$ Sn Quadrupole Magnet During the Assembly Stage for the High-Luminosity LHC Accelerator Upgrade Project},
author = {Wang, Xiaorong and Ambrosio, Giorgio F. and Cheng, Daniel W. and Chlachidze, Guram and DiMarco, Joseph and Ghiorso, William and Hernikl, Christopher and Lipton, Thomas M. and Myers, Scott and Pan, Heng and Prestemon, Soren O. and Sabbi, GianLuca},
abstractNote = {The U.S. High-Luminosity LHC Accelerator Upgrade Project, in collaboration with CERN, is developing Nb3Sn quadrupole magnets (MQXFA) to be installed at the interaction region of the LHC. The project will deliver 20 MQXFA magnets in 10 cold masses. These magnets need to meet the stringent requirements on field quality at the nominal operating current. Compared to the mature NbTi accelerator magnet technology, achieving excellent field quality can be challenging for Nb3Sn magnets. To help track, understand, and allow effective correction of geometric field errors, field quality measurements at room temperature during the MQXFA assembly stage was planned for the project. The measurements also intend to evaluate the magnetic axis and twist angle along the magnet aperture. We report the first measurement on a prototype MQXFA magnet using a recently developed measurement system. The magnetic axis and twist angle met the acceptance criteria. Further development needs for the room-temperature measurements were discussed. Here, we expect that statistics obtained from such measurements throughout the project will provide insight into future applications of high-performance Nb3Sn accelerator magnets.},
doi = {10.1109/TASC.2019.2892119},
journal = {IEEE Transactions on Applied Superconductivity},
issn = {1051-8223},
number = 5,
volume = 29,
place = {United States},
year = {2019},
month = {1}
}

Journal Article:
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