A High Field Magnet Combining Superconductors with Water-Cooled Conductors

Montgomery, D.B.; Williams, J.E.C.; Pierce, N.; Weggel, R.J.; Leupold, M.J.

doi:10.1007/978-1-4757-0549-2_11

Cited by 15 publications

(4 citation statements)

References 2 publications

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“…(The load may be converted to stress units of MN/m 2 or psi by multiplying by 0.309/m 2 and 43.8 lb/kg-in. 2 , respectively.) The width of the initial loadstrain loop at zero load was nearly as large as the total strain in the first half-cycle.…”

Section: Stress-strain Cycling Modesmentioning

confidence: 95%

“…However, the experiments were designed to provide sufficient understanding of the source of the Ap Q so that extrapolation from the data to more extreme conditions would be based on valid models. The scope of the work accomplished under this program was sufficient to (l) provide a reliable basis for specifying the optimum purity and heat treatment of the copper to be purchased and (2) obtain reliable estimates of the increase in p Q during cyclic straining of any particular copper during magnet operation.…”

mentioning

confidence: 99%

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Effects of cyclic strains on transport properties of a superconducting composite: phase I, degradation of electrical conductivity in copper at 4. 2 K

Fisher¹,

Kim²,

Linz³

et al. 1977

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Section: Stress-strain Cycling Modesmentioning

confidence: 95%

mentioning

confidence: 99%

Effects of cyclic strains on transport properties of a superconducting composite: phase I, degradation of electrical conductivity in copper at 4. 2 K

Fisher¹,

Kim²,

Linz³

et al. 1977

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“…Although the workhorses of any Magnet Laboratory are indeed resistive magnets, there are several reasons to combine superconducting and resistive magnetic fields in so-called hybrid magnets [1]. The historic reason has been to produce the highest available steady fields.…”

Section: Introductionmentioning

confidence: 99%

Design for a 30 T Resistive Insert in a 40+ T Hybrid Magnet at the Nijmegen HFML

Wiegers

Gao

Pereboom³

et al. 2004

IEEE Trans. Appl. Supercond.

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We present our design for a 30 T resistive insert to combine with an 11 T superconducting outsert to a 40+ T hybrid magnet. The insert is matched to a 40 kA, 500 V power supply. The free bore is 32 mm. The design uses five subcoils, of which the inner four are from Cu-Ag alloy. Special care was taken with respect to the end windings, which can become critically stressed. Design tools from NHMFL in Tallahassee FL were used to optimize the magnetic field, staying well within limits of available conductor ultimate tensile strength. Finite element calculations were used to check details of stress, strain and temperature distribution. Fabrication methods will include lasercutting of the two inner coils. The insert will be mounted semi-rigidly to the outsert to accommodate fault forces by allowing the insert move.Index Terms-High magnetic fields, hybrid magnet.

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“…In 1966, Wood and Montgomery proposed the concept of the hybrid magnet (~) where the background field of a large size superconducting coil (~) around the resistive, watercooled magnet allows to generate much higher fields in an economical way [10]. The Francis Bitter National Magnet Laboratory was the first to build such a system and in 1974 generated 20 T [11]. A smaller 16 T hybrid magnet was constructed at the Clarendon Laboratory in Oxford and has been in service for 15 years since 1975.…”

Section: Introductionmentioning

confidence: 99%