Overview and status of the Next European Dipole Joint Research Activity

Devred, A.; Baudouy, B.; Baynham, D.E.; Boutboul, T.; Canfer, Simon; Chorowski, M.; Fabbricatore, P.; Farinon, S.; Ouden, A. den; Weelderen, R. van; Védrine, P.; Volpini, G.

doi:10.1088/0953-2048/19/3/010

Cited by 50 publications

(30 citation statements)

References 37 publications

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“…Originally proposed by Meyer and Flasck in 1969 [32], the concept has recently gained interest for various accelerator magnet applications [33][34][35][36][37][38].…”

Section: B a Canted Cos θ Dipole Windingmentioning

confidence: 99%

Strain Distribution in REBCO-Coated Conductors Bent With the Constant-Perimeter Geometry

Wang

Arbelaez

Caspi

et al. 2017

IEEE Trans. Appl. Supercond.

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Abstract-Cable and magnet applications require bending REBa2Cu3O 7−δ (REBCO, RE = Rare Earth) tapes around a former to carry high current or generate specific magnetic fields. With a high aspect ratio, REBCO tapes favor the bending along their broad surfaces (easy way) than their thin edges (hard way). The easy-way bending forms can be effectively determined by the constant-perimeter method that was developed in the 1970s to fabricate accelerator magnets with flat thin conductors. The method, however, does not consider the strain distribution in the REBCO layer that can result from bending. Therefore, the REBCO layer can be over-strained and damaged even if it is bent in an easy way as determined by the constant-perimeter method.To address this issue, we developed a numerical approach to determine the strain in the REBCO layer using the local curvatures of the tape neutral plane. Two orthogonal strain components are determined: the axial component along the tape length and the transverse component along the tape width. These two components can be used to determine the conductor critical current after bending. The approach is demonstrated with four examples relevant for applications: a helical form for cables, forms for canted cos θ dipole and quadrupole magnets, and a form for the coil end design. The approach allows to optimize the design of REBCO cables and magnets based on the constantperimeter geometry and to reduce the strain-induced critical current degradation.

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“…Originally proposed by Meyer and Flasck in 1969 [32], the concept has recently gained interest for various accelerator magnet applications [33][34][35][36][37][38].…”

Section: B a Canted Cos θ Dipole Windingmentioning

confidence: 99%

Strain Distribution in REBCO-Coated Conductors Bent With the Constant-Perimeter Geometry

Wang

Arbelaez

Caspi

et al. 2017

IEEE Trans. Appl. Supercond.

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“…The present record current density PIT wire, developed for the Next European Dipole Joint Research Activity [46], is a ternary 288 filament wire as shown in Fig. 1.…”

Section: Critical Current Density and N-value As A Function Of Magnetmentioning

confidence: 99%

State of the art powder-in-tube niobium–tin superconductors

et al. 2008

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Powder-in-Tube (PIT) processed Niobium-Tin wires are commercially manufactured for nearly three decades and have demonstrated a combination of very high current density (presently up to 2500 Amm -2 non-Cu at 12 T and 4.2 K) with fine (35 /im), well separated filaments. We review the developments that have led to the present state of the art PIT Niobium-Tin wires, discuss the wire manufacturing and A15 formation processes, and describe typical superconducting performance in relation to magnetic field and strain. We further highlight successful applications of PIT wires and conclude with an outlook on possibilities for further improvements in the performance of PIT Niobium-Tin wires.

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“…In Europe, in January 2008, the HFM (High Field Magnets) took over the NED program, which was mainly focused on the cable development [5]- [7]. Within the framework of the European project EuCARD, the SMC is the first European test dipole using the conductor.…”

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confidence: 99%

Magnetic Design and Code Benchmarking of the SMC (Short Model Coil) Dipole Magnet

Manil

Regis

Rochford

et al. 2010

IEEE Trans. Appl. Supercond.

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Abstract-Thecable, by applying different levels of pre-stress. To fully satisfy this purpose, a versatile and easy-to-assemble structure has been realized. The design of the SMC magnet has been developed from an existing dipole magnet, the SD01, designed, built and tested at LBNL with support from CEA. The goal of the magnetic design presented in this paper is to match the high field region with the high stress region, located along the dipole straight section. For this purpose, three-dimensional nonlinear parametric models have been implemented using three codes (CAST3M, ANSYS, and OPERA). This optimization process has been an opportunity to cross-check the codes. The results of this benchmarking are presented here, along with the final design which incorporates the use of end spacers and a surrounding iron structure to deliver a nominal field of 13 T uniformly distributed along the cable straight section.

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Overview and status of the Next European Dipole Joint Research Activity

Cited by 50 publications

References 37 publications

Strain Distribution in REBCO-Coated Conductors Bent With the Constant-Perimeter Geometry

Strain Distribution in REBCO-Coated Conductors Bent With the Constant-Perimeter Geometry

State of the art powder-in-tube niobium–tin superconductors

Magnetic Design and Code Benchmarking of the SMC (Short Model Coil) Dipole Magnet

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