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Title: Magnetic Analysis of the Nb3Sn Low-Beta Quadrupole for the High-Luminosity LHC

Journal Article · · IEEE Transactions on Applied Superconductivity
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  1. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
+ Show Author Affiliations

As part of the Large Hadron Collider Luminosity upgrade (HiLumi-LHC) program, the US LARP collaboration and CERN are working together to design and build 150 mm aperture Nb3Sn quadrupoles for the LHC interaction regions. A first series of 1.5 m long coils were fabricated, assembled and tested in the first short model. Our paper presents the magnetic analysis, comparing magnetic field measurements with the expectations and the field quality requirements. The analysis is focused on the geometrical harmonics, iron saturation effect and cold-warm correlation. Three dimensional effects such as the variability of the field harmonics along the magnet axis and the contribution of the coil ends are also discussed. Furthermore, we present the influence of the conductor magnetization and the dynamic effects.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
LARP; LARP Collaboration
Grant/Contract Number:
AC02-05CH11231; AC02-07CH11359
OSTI ID:
1563932
Alternate ID(s):
OSTI ID: 1340491; OSTI ID: 1341878
Report Number(s):
FERMILAB-PUB-17-008-TD; ark:/13030/qt1533574r; TRN: US2000787
Journal Information:
IEEE Transactions on Applied Superconductivity, Vol. 27, Issue 4; ISSN 1051-8223
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

Figures / Tables (12)

Fig. 1(p. 1)figure Fig. 1
TABLE I(p. 1)table TABLE I
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TABLE II(p. 2)table TABLE II
Fig. 3(p. 3)figure Fig. 3
Fig. 4(p. 3)figure Fig. 4
Fig. 5(p. 3)figure Fig. 5
Fig. 6(p. 3)figure Fig. 6
Fig. 7(p. 3)figure Fig. 7
Fig. 8(p. 4)figure Fig. 8
Fig. 9(p. 4)figure Fig. 9
TABLE III(p. 4)table TABLE III

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Related Subjects

43 PARTICLE ACCELERATORS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
high luminosity LHC
field quality
magnetic measurements
high field Nb3Sn magnet