The NHMFL Hybrid Magnet Projects

Bird, M.D.; Bai, Hongyu; Bole, S.; Chen, Jingping; Dixon, I.R.; Ehmler, H.; Gavrilin, A.V.; Painter, T.A.; Smeibidl, P.; Toth, J.; Weijers, H.W.; Xu, Ting; Zhai, Yuhu

doi:10.1109/tasc.2009.2018269

Cited by 47 publications

(29 citation statements)

References 16 publications

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“…Two magnet projects (EDIPO [6], and the Series-Connected Hybrids [1]) have been using "advanced" Nb Sn strands, with non-Cu larger than 2200 A/mm at 12 T and 4.2 K. We have investigated a 0.81 mm diameter Bruker/EAS PIT strand in a qualifying program, the results of which are reported at this conference in a separate paper [7]. One of the findings therein is that the PIT wire withstands the irreversible -deteriorating tensile strain that often occurs in a CICC in operation up to 0.1%.…”

Section: A Strand Propertiesmentioning

confidence: 99%

“…In the past decade a number of Hybrid Magnet projects in several High Magnetic Field Facilities have been started [1]- [4]. It is generally agreed that the superconducting outsert magnets should be very robust and reliable to be able to operate in conjunction with a resistive insert magnet in user facilities [5].…”

Section: Introductionmentioning

confidence: 99%

“…Digital Object Identifier 10.1109/TASC.2010.2043659 developed e.g., in the EDIPO project [6] and the Series-Connected Hybrid projects of the NHMFL [1]. More specifically, we require that the outsert magnet be stable against insert magnet trips, i.e., does not quench, which is a serious complication in a hybrid magnet.…”

Section: Introductionmentioning

confidence: 99%

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Conceptual Design of the 45 T Hybrid Magnet at the Nijmegen High Field Magnet Laboratory

Wiegers

Ouden

Rook

et al. 2010

IEEE Trans. Appl. Supercond.

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Abstract-A 45 T Hybrid Magnet System is being developed at the Nijmegen High Field Magnet Laboratory as part of the Nijmegen Center for Advanced Spectroscopy. The 45 T Hybrid Magnet System will be used in combination with far-infra-red light produced by a Free Electron Laser under construction directly adjacent to the High Field Magnet Laboratory. The superconducting outsert magnet will consist of three CICC coils wound on a single coil form, using Nb 3 Sn strands. A test program for strand and cable qualification is underway. The CICC will carry 13 kA and the coils will produce 12 T on axis field in a 600 mm warm bore. The nominal operating temperature will be 4.5 K maintained with forced-flow supercritical helium. The insert magnet will produce 33 T at 40 kA in a 32 mm bore consuming 20 MW, and will consist of four coils. The insert magnet will be galvanically and mechanically isolated from the outsert magnet. Complete system availability for users is expected in 2014. In this paper we will report on the conceptual design of the 45 T Hybrid Magnet System. Index Terms-CIC conductor, high field magnets, hybrid magnets, superconducting magnets.

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Section: A Strand Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Conceptual Design of the 45 T Hybrid Magnet at the Nijmegen High Field Magnet Laboratory

Wiegers

Ouden

Rook

et al. 2010

IEEE Trans. Appl. Supercond.

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“…Neutron scattering in high magnetic fields has led to a number of important discoveries such as Bose-Einstein condensation in magnetic materials and field induced antiferromagnetic order in high temperature superconductors [1], [2]. However, research of condensed matter systems is bringing up an increasing number of questions which require experiments combining neutron scattering and magnetic fields above 17 T. Therefore HZB started in collaboration with NHMFL an ambitious project of extending the magnetic field range significantly [3], [4]. One should mention that DC fields are essential for neutron scattering experiments, especially for those samples which need large data sets for good statistics.…”

Section: Introductionmentioning

confidence: 99%

First Hybrid Magnet for Neutron Scattering at Helmholtz-Zentrum Berlin

Smeibidl

Bird

Ehmler

et al. 2016

IEEE Trans. Appl. Supercond.

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Abstract-Helmholtz-Zentrum Berlin operates two large scale facilities: the research reactor BER 2 and the synchrotron source for soft x-rays BESSY 2. This year HZB's neutron instrument suite around BER 2 has been strengthened by a unique high magnetic field facility for neutron scattering. Its main components are the High Field Magnet (HFM), the most powerful DC magnet for neutron scattering worldwide, and the Extreme Environment Diffractometer (EXED), the dedicated neutron instrument for time-of-flight technique. The hybrid magnet system is projected according to the special geometric constraints of analysing samples by neutron scattering in a high field magnet. Following our past experience only steady state fields are adequate to achieve the goals of the project. In particular inelastic scattering studies would virtually be excluded when using pulsed magnets. The new series-connected hybrid magnet with horizontal field orientation was designed and

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“…Two Series-Connected Hybrid (SCH) magnets, one for the Helmholtz Zentrum Berlin (HZB) and one for the National High Magnetic Field Laboratory (NHMFL) are being developed at the NHMFL [1]. Both SCH magnets have the same superconducting outsert coil constructed of Nb 3 Sn cable-in-conduit conductors (CICC) cooled with supercritical helium (He) at 4.5 K. High temperature superconductor (HTS) current leads have been proved to work effectively in high current supply superconducting magnet system and they can also greatly reduce the heat load to 4.5 K in the cryogenic system compared with conventional copper current leads, and so we planed to use HTS current leads in both SCH magnets.…”

Section: Introductionmentioning

confidence: 99%

Current leads cooling for the series-connected hybrid magnets

Bai¹,

Marshall²,

Bird³

et al. 2014

AIP Conference Proceedings

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Abstract. Two Series-Connected Hybrid (SCH) magnets are being developed at the National High Magnetic Field Laboratory. Both SCH magnets combine a set of resistive Florida-Bitter coils with a superconducting outsert coil constructed of the cable-in-conduit conductor (CICC). The outsert coils of the two magnets employ 20 kA BSCCO HTS current leads for the power supply although they have different designs and cooling methods. The copper heat exchangers of the HTS current leads for the HZB SCH are cooled with forced flow helium at a supply temperature of 44 K, while the copper heat exchangers of HTS current leads for NHMFL SCH are cooled with liquid nitrogen at a temperature of 78 K in a self-demand boil-off mode. This paper presents the two cooling methods and their impacts on cryogenic systems. Their efficiencies and costs are compared and presented.

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The NHMFL Hybrid Magnet Projects

Cited by 47 publications

References 16 publications

Conceptual Design of the 45 T Hybrid Magnet at the Nijmegen High Field Magnet Laboratory

Conceptual Design of the 45 T Hybrid Magnet at the Nijmegen High Field Magnet Laboratory

First Hybrid Magnet for Neutron Scattering at Helmholtz-Zentrum Berlin

Current leads cooling for the series-connected hybrid magnets

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