Long life pulsed high field magnets with CuAg conductor and internal reinforcement

Bockstal, L. Van; Li, L.; Harrison, N.; Heremans, G.; Herlach, F.; Starett, B.; Clark, R. G.

doi:10.1109/20.511384

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…Carbon fibre is most critical in this respect because one loose fibre in the wrong place can wreak havoc, in the coil as well as in electronic equipment used for winding. Extensive efforts to overcome this severe problem have finally been rewarded with success [102,172]. Both carbon fibre and pearlitic steel are well suited for external reinforcement; direct winding around the coil structure gives the best possible transmission of stress.…”

Section: Mechanical Strength and Peak Fieldmentioning

confidence: 99%

Pulsed magnets

Herlach¹

1999

Rep. Prog. Phys.

105

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Pulsed magnets are divided into two categories: below 100 T with pulse duration in the range 1 ms-1 s, and above 100 T with pulse duration of order microsecond due to self-destruction of the coil. For both categories, simple scaling laws for the performance are given. For nondestructive magnets, these depend in the first place on the mechanical strength and electrical conductivity of the materials used in coil design; another important parameter is the size of the bore. Together with the energy and power available from the pulsed power supply, this determines peak field and pulse duration. Different types of power supply are discussed, capacitor banks as well as controlled rectification of ac power. For destructive magnets, there is a simple relation between the peak field and the velocity at which the coil structure is expanded by the magnetic force; this can be estimated from shock wave properties of the conductor. The expansion can be neutralized by imploding the coil in a flux compression experiment. High explosives as well as electromagnetic forces have been used for this purpose to obtain fields up to 2800 T. A simple and efficient method is the exploding single-turn coil; this is best suited for experiments up to 300 T.The design and performance of the different magnets is discussed in detail. A few examples for application of these magnets in experiments are given. Prospects for generating higher fields by different methods are discussed, in particular miniaturization on all levels-coils ('micro-magnets') as well as experiments.

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Section: Mechanical Strength and Peak Fieldmentioning

confidence: 99%

Pulsed magnets

Herlach¹

1999

Rep. Prog. Phys.

105

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“…The constant increasing of dimensions, the construction complexity and installation costs of electromagnets needed to achieve the extremely high intensity magnetic field require novel materials with high operational properties. For instance, the windings of electromagnet coils responsible for generating strong magnetic field impulses should be manufactured from materials characterized by high strength, impact and fatigue resistance and high electrical conductivity properties [1][2][3]. The windings of the electromagnet operate at the cryogenic conditions as a result of causing short term electromagnetic impulses (a fraction of a second), which generate Lorenz forces with very high values directed from the centre of the coil outwards.…”

Section: Introductionmentioning

confidence: 99%

Research on Mechanical and Electrical Properties of Cu-Ag Alloys Designed for the Construction of High Magnetic Field Generators

Kawecki

Sieja-Smaga

Korzeń

et al. 2021

JCME

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The individual sections, wiring and construction of electromagnet windings responsible for strong magnetic field impulses may be one application for hypoeutectic Cu-Ag alloys. High electrical properties and mechanical properties (tensile strength, yield strength, impact strength) as well as high heat, fatigue and rheological resistance are required for these kinds of applications due to the unique nature of such operations (strong vibrations of high frequency and amplitude resulting from Lorenz forces and the possibility of significant and rapid heating from Jule’s heat). The limited solubility of copper and silver in the solid state enables the effective modification of the alloys’ microstructure through heat treatment and further shaping of their high mechanical and electrical properties via cold plastic working. The article presents the manufacturing of Cu-Ag alloys with the weight percent of Ag between 3 and 7 using the continuous casting process along with research on the physicochemical, mechanical and electrical properties of the obtained casts. The research on the amount of plastic deformation and its influence on the wire drawing process and the mechanical and electrical properties of the wires is also discussed. The temperature coefficients of resistance were defined in order to determine the temperature influence on the electrical resistance changes dynamics. The microstructural analysis was carried out in the as-cast state. The preliminary research conducted indicates that the obtained Cu-Ag alloys in the as-cast state exhibit a set of high mechanical and electrical properties. The prospective next stage of research includes the selection of favourable heat treatment parameters which would provide optimally modified microstructure of the alloys, as well as determining the deformation coefficients allowing for further increases in the mechanical and electrical properties.

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Approaching 100 T with wire wound coils

Herlach

Harrison

et al. 1996

IEEE Trans. Magn.

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Long life pulsed high field magnets with CuAg conductor and internal reinforcement

Cited by 3 publications

References 5 publications

Pulsed magnets

Pulsed magnets

Research on Mechanical and Electrical Properties of Cu-Ag Alloys Designed for the Construction of High Magnetic Field Generators

Approaching 100 T with wire wound coils

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