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Title: Mechanical Design Studies of the MQXF Long Model Quadrupole for the HiLumi LHC

Abstract

The Large Hadron Collider Luminosity upgrade (HiLumi) program requires new low-β triplet quadrupole magnets, called MQXF, in the interaction region to increase the LHC peak and integrated luminosity. The MQXF magnets, designed and fabricated in collaboration between CERN and the U.S. LARP, will all have the same cross section. The MQXF long model, referred as MQXFA, is a quadrupole using the Nb3Sn superconducting technology with 150 mm aperture and a 4.2 m magnetic length and is the first long prototype of the final MQXF design. The MQXFA magnet is based on the previous LARP HQ and MQXFS designs. In this paper, we present the baseline design of the MQXFA structure with detailed three-dimensional (3-D) numerical analysis. A detailed tolerance analysis of the baseline case has been performed by using a 3-D finite element model, which allows fast computation of structures modeled with actual tolerances. Tolerance sensitivity of each component is discussed to verify the actual tolerances to be achieved by vendors. Tolerance stack-up analysis is presented in the end of this paper.

Authors:
 [1];  [1];  [2];  [1];  [1];  [3];  [4];  [3];  [1];  [3]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  3. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  4. Alternative Energies and Atomic Energy Commission (CEA), Saclay (France)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1339116
Alternate Identifier(s):
OSTI ID: 1561873
Report Number(s):
FERMILAB-PUB-16-606-TD
Journal ID: ISSN 1051-8223; 1508104; TRN: US1701113
Grant/Contract Number:  
AC02-07CH11359; SC0000661; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
IEEE Transactions on Applied Superconductivity
Additional Journal Information:
Journal Volume: PP; Journal Issue: 99; Journal ID: ISSN 1051-8223
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; High Luminosity LHC (HL-LHC), quadrupole; LARP; Nb3Sn magnet; shell-based support structure; long model; tolerance analysis

Citation Formats

Pan, Heng, Anderssen, Eric, Ambrosio, Giorgio, Cheng, Daniel, Juchno, Mariusz, Ferracin, Paolo, Felice, Helene, Perez, Juan, Prestemon, Soren, and Vallone, Giorgio. Mechanical Design Studies of the MQXF Long Model Quadrupole for the HiLumi LHC. United States: N. p., 2016. Web. https://doi.org/10.1109/TASC.2016.2642169.
Pan, Heng, Anderssen, Eric, Ambrosio, Giorgio, Cheng, Daniel, Juchno, Mariusz, Ferracin, Paolo, Felice, Helene, Perez, Juan, Prestemon, Soren, & Vallone, Giorgio. Mechanical Design Studies of the MQXF Long Model Quadrupole for the HiLumi LHC. United States. https://doi.org/10.1109/TASC.2016.2642169
Pan, Heng, Anderssen, Eric, Ambrosio, Giorgio, Cheng, Daniel, Juchno, Mariusz, Ferracin, Paolo, Felice, Helene, Perez, Juan, Prestemon, Soren, and Vallone, Giorgio. Tue . "Mechanical Design Studies of the MQXF Long Model Quadrupole for the HiLumi LHC". United States. https://doi.org/10.1109/TASC.2016.2642169. https://www.osti.gov/servlets/purl/1339116.
@article{osti_1339116,
title = {Mechanical Design Studies of the MQXF Long Model Quadrupole for the HiLumi LHC},
author = {Pan, Heng and Anderssen, Eric and Ambrosio, Giorgio and Cheng, Daniel and Juchno, Mariusz and Ferracin, Paolo and Felice, Helene and Perez, Juan and Prestemon, Soren and Vallone, Giorgio},
abstractNote = {The Large Hadron Collider Luminosity upgrade (HiLumi) program requires new low-β triplet quadrupole magnets, called MQXF, in the interaction region to increase the LHC peak and integrated luminosity. The MQXF magnets, designed and fabricated in collaboration between CERN and the U.S. LARP, will all have the same cross section. The MQXF long model, referred as MQXFA, is a quadrupole using the Nb3Sn superconducting technology with 150 mm aperture and a 4.2 m magnetic length and is the first long prototype of the final MQXF design. The MQXFA magnet is based on the previous LARP HQ and MQXFS designs. In this paper, we present the baseline design of the MQXFA structure with detailed three-dimensional (3-D) numerical analysis. A detailed tolerance analysis of the baseline case has been performed by using a 3-D finite element model, which allows fast computation of structures modeled with actual tolerances. Tolerance sensitivity of each component is discussed to verify the actual tolerances to be achieved by vendors. Tolerance stack-up analysis is presented in the end of this paper.},
doi = {10.1109/TASC.2016.2642169},
journal = {IEEE Transactions on Applied Superconductivity},
number = 99,
volume = PP,
place = {United States},
year = {2016},
month = {12}
}

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Works referencing / citing this record:

Direct measurement of Nb 3 Sn filament loading strain and stress in accelerator magnet coil segments
journal, March 2019

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