Analysis of the mechanical behaviour of an 11.5 T Nb3Sn LHC dipole magnet according to the ring collar concept

A. den Ouden; H.H.J. ten Kate; D. ter Avest; W. van Emden; C. Daum

doi:10.1109/20.119878

Analysis of the mechanical behaviour of an 11.5 T Nb₃Sn LHC dipole magnet according to the ring collar concept

A. den Ouden, H.H.J. ten Kate, D. ter Avest, W. van Emden, C. Daum

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

According to the CERN-LHC (Large Hadron Collider) reference design, 10-tesla twin-aperture NbTi dipoles will be built with split collars that enclose both apertures. As part of the development program towards an experimental 11.5-tesla Nb3Sn LHC dipole magnet, the mechanical implications of an alternative collar concept have been studied with a finite element analysis. In this concept ring shaped collars are shrunk on each finished single aperture coil, thus providing the necessary room-temperature prestress. This system results in a major improvement of the stress distribution in the collars. It is noted that introduction of friction at the sliding planes can cause reopening of the gap between the yoke halves during excitation. This depends strongly on the value of the friction coefficients

Original language	English
Pages (from-to)	331-334
Number of pages	4
Journal	IEEE transactions on magnetics
Volume	28
Issue number	1
DOIs	https://doi.org/10.1109/20.119878
Publication status	Published - 1992
Event	12th International Conference on Magnet Technology, MT-12 1991 - Leningrad (St. Petersburg), Russian Federation Duration: 24 Jun 1991 → 28 Jun 1991 Conference number: 12

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@article{9feb576cffb64cd78762ffd2b9f0d220,

title = "Analysis of the mechanical behaviour of an 11.5 T Nb3Sn LHC dipole magnet according to the ring collar concept",

abstract = "According to the CERN-LHC (Large Hadron Collider) reference design, 10-tesla twin-aperture NbTi dipoles will be built with split collars that enclose both apertures. As part of the development program towards an experimental 11.5-tesla Nb3Sn LHC dipole magnet, the mechanical implications of an alternative collar concept have been studied with a finite element analysis. In this concept ring shaped collars are shrunk on each finished single aperture coil, thus providing the necessary room-temperature prestress. This system results in a major improvement of the stress distribution in the collars. It is noted that introduction of friction at the sliding planes can cause reopening of the gap between the yoke halves during excitation. This depends strongly on the value of the friction coefficients",

author = "{den Ouden}, A. and {ten Kate}, H.H.J. and {ter Avest}, D. and {van Emden}, W. and C. Daum",

year = "1992",

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journal = "IEEE transactions on magnetics",

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T1 - Analysis of the mechanical behaviour of an 11.5 T Nb3Sn LHC dipole magnet according to the ring collar concept

AU - den Ouden, A.

AU - ten Kate, H.H.J.

AU - ter Avest, D.

AU - van Emden, W.

AU - Daum, C.

N1 - Conference code: 12

PY - 1992

Y1 - 1992

N2 - According to the CERN-LHC (Large Hadron Collider) reference design, 10-tesla twin-aperture NbTi dipoles will be built with split collars that enclose both apertures. As part of the development program towards an experimental 11.5-tesla Nb3Sn LHC dipole magnet, the mechanical implications of an alternative collar concept have been studied with a finite element analysis. In this concept ring shaped collars are shrunk on each finished single aperture coil, thus providing the necessary room-temperature prestress. This system results in a major improvement of the stress distribution in the collars. It is noted that introduction of friction at the sliding planes can cause reopening of the gap between the yoke halves during excitation. This depends strongly on the value of the friction coefficients

AB - According to the CERN-LHC (Large Hadron Collider) reference design, 10-tesla twin-aperture NbTi dipoles will be built with split collars that enclose both apertures. As part of the development program towards an experimental 11.5-tesla Nb3Sn LHC dipole magnet, the mechanical implications of an alternative collar concept have been studied with a finite element analysis. In this concept ring shaped collars are shrunk on each finished single aperture coil, thus providing the necessary room-temperature prestress. This system results in a major improvement of the stress distribution in the collars. It is noted that introduction of friction at the sliding planes can cause reopening of the gap between the yoke halves during excitation. This depends strongly on the value of the friction coefficients

U2 - 10.1109/20.119878

DO - 10.1109/20.119878

M3 - Article

VL - 28

SP - 331

EP - 334

JO - IEEE transactions on magnetics

JF - IEEE transactions on magnetics

SN - 0018-9464

IS - 1

T2 - 12th International Conference on Magnet Technology, MT-12 1991

Y2 - 24 June 1991 through 28 June 1991

ER -

Analysis of the mechanical behaviour of an 11.5 T Nb3Sn LHC dipole magnet according to the ring collar concept

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Analysis of the mechanical behaviour of an 11.5 T Nb₃Sn LHC dipole magnet according to the ring collar concept