About the mechanics of SSC dipole magnet prototypes

Devred, A.; Bush, T.; Coombes, R.; DiMarco, J.; Goodzeit, C.; Kuźmiński, J.; Puglisi, M.; Radusewicz, P.; Sanger, P.; Schermer, R.; Spigo, G.; Thompkins, J.; Turner, John R.; Wolf, Z.; Yu, Yang; Zheng, H.; Ogitsu, T.; Anerella, M.; Cottingham, J.; Ganetis, G.; Garber, M.; Ghosh, A.; Greene, A.; Gupta, R.; Herrera, J.; Kahn, S.; Kelly, E.; Meade, A.; Morgan, G.; Muratore, J.; Prodell, A.; Rehak, M.; Rohrer, E.P.; Sampson, W.; Shutt, R.; Thompson, P.; Wanderer, P.; Willen, E.; Bleadon, M.; Hanft, R.; Kuchnir, M.; Mantsch, P.; Mazur, Péter; Orris, D.; Peterson, T.; Strait, J.; Royet, J.; Scanlan, R.M.; Taylor, C.

doi:10.1063/1.41955

Cited by 26 publications

(16 citation statements)

References 21 publications

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“…1 and 2), i.e., 1% of our sample height. This is the same order of magnitude of the integrated thermal contraction of the stack [21]- [26]. We also showed that, with a low stress of about 0.4 MPa, the stack height can be determined with a relative precision of about 0.3%.…”

Section: A Measurement Methodssupporting

confidence: 50%

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Thermomechanical properties of the coil of the superconducting magnets for the Large Hadron Collider

Couturier

Ferracin²,

Scandale³

et al. 2002

IEEE Trans. Appl. Supercond.

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Abstract-The correct definition and measurement of the thermomechanical properties of the superconducting cable used in high-field magnets is crucial to study and model the behavior of the magnet coil from assembly to the operational conditions. In this paper, the authors analyze the superconducting coil of the main dipoles for the Large Hadron Collider. They describe an experimental setup for measuring the elastic modulus at room and at liquid nitrogen temperature and for evaluating the thermal contraction coefficient. The coils exhibit strong nonlinear stressstrain behavior characterized by hysteresis phenomena, which decreases from warm to cold temperature, and a thermal contraction coefficient, which depends on the stress applied to the cable during cooldown.

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Section: A Measurement Methodssupporting

confidence: 50%

“…We explore the ambiguities in its definition, pointing out that different approaches chosen to evaluate the strains lead to significant variations in the obtained integrated thermal contraction. This also explains the rather large variation of thermal contraction values reported in the literature [21]- [26].…”

Section: Introductionsupporting

confidence: 55%

Thermomechanical properties of the coil of the superconducting magnets for the Large Hadron Collider

Couturier

Ferracin²,

Scandale³

et al. 2002

IEEE Trans. Appl. Supercond.

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“…During the cool-down, the low thermal contraction of the stainless steel collars coupled with the large thermal contraction of the superconducting coils contributes to a significant prestress loss (see Fig. 16), similarly to what was found for the SSC dipoles [35]: the final target for the azimuthal stress at 1.9 K is ~30 MPa. The mechanism of the pre-stress loss is due not only to the differential thermal contraction but also to the hysteresis in the mechanical behavior of the coil [36].…”

Section: ≥70 ≥70supporting

confidence: 55%

The Development of Superconducting Magnets for Use in Particle Accelerators: From the Tevatron to the LHC

Tollestrup

Todesco

2008

Rev. Accl. Sci. Tech.

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Superconducting magnets have played a key role in advancing the energy reach of proton synchrotrons and enabling them to play a major role in defining the Standard Model. The problems encountered and solved at the Tevatron are described and used as an introduction to the many challenges posed by the use of this technology. The LHC is being prepared to answer the many questions beyond the Standard Model and in itself is at the cutting edge of technology. A description of its magnets and their properties is given to illustrate the advances that have been made in the use of superconducting magnets over the past 30 years. EZIO TODESCO CERN, Accelerator Technology Department Geneva, 1211 SwitzerlandSuperconducting magnets have played a key role in advancing the energy reach of proton synchrotrons and enabling them to play a major role in defining the Standard Model. The problems encountered and solved at the Tevatron are described and used as an introduction to the many challenges posed by the use of this technology. The LHC is being prepared to answer the many questions beyond the Standard Model and in itself is at the cutting edge of technology. A description of its magnets and their properties is given to illustrate the advances that have been made in the use of superconducting magnets over the past 30 years.

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“…6). This phenomenon, called ratcheting, has been observed in previous magnets [17][18][19][20], and can be related to the friction between the coil and its surrounding components.…”

Section: Strain Gauge Measurementsmentioning

confidence: 98%

Finite element model of training in the superconducting quadrupole magnet SQ02

Ferracin¹,

Caspi²

2007

Cryogenics

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This paper describes the use of 3D finite element models to study training in superconducting magnets. The simulations are used to examine coil displacements when the electromagnetic forces are cycled, and compute the frictional energy released during conductor motion with the resulting temperature rise. A computed training curve is then presented and discussed. The results from the numerical computations are compared with test results of the Nb 3 Sn racetrack quadrupole magnet SQ02.

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About the mechanics of SSC dipole magnet prototypes

Cited by 26 publications

References 21 publications

Thermomechanical properties of the coil of the superconducting magnets for the Large Hadron Collider

Thermomechanical properties of the coil of the superconducting magnets for the Large Hadron Collider

The Development of Superconducting Magnets for Use in Particle Accelerators: From the Tevatron to the LHC

Finite element model of training in the superconducting quadrupole magnet SQ02

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