Progress in the Development of a Superconducting 32 T Magnet With REBCO High Field Coils

114

Abstract-EuCARD-2 is a project supported by FP7-European Commission that includes, inter alia, a work-package (WP10) called "Future Magnets". This project is part of the long term development that CERN is launching to explore magnet technology at 16 T to 20 T dipole operating field, within the scope of a study on Future Circular Colliders. The EuCARD2 collaboration is closely liaising with similar programs for high field accelerator magnets in the USA and Japan. The main focus of EuCARD2 WP10 is the development of a 10 kA-class superconducting, high current density cable suitable for accelerator magnets, The cable will be used to wind a stand-alone magnet 500 mm long and with an aperture of 40 mm. This magnet should yield 5 T, when stand-alone, and will enable to reach a 15 to 18 T dipole field by placing it in a large bore background dipole of 12-15 T. REBCO based Roebel cables is the baseline. Various magnet configurations with HTS tapes are under investigation and also use of Bi-2212 round wire based cables is considered. The paper presents the structure of the collaboration and describes the main choices made in the first year of the program, which has a breadth of five to six years of which four are covered by the FP7 frame.

Section: The Wam-hts Workhopsmentioning

confidence: 69%

The EuCARD-2 Future Magnets European Collaboration for Accelerator-Quality HTS Magnets

Rossi

Badel

Bajko

et al. 2015

114

“…To attain higher field and thus extend the particle energy reach it will be necessary to resort to High Temperature Superconductors (HTS) [4], profiting from the high critical field and exceptional critical current properties at the liquid helium temperature of 4.2 K [5]. Several initiatives worldwide are addressing the technology issues associated with the use of HTS materials in high-field magnets, for accelerators [6]- [14] as well as other fields [15], [16]. In the case of our work, the objective of the EuCARD2 Work Package 10 (WP10 -Future Magnets) is to demonstrate that HTS materials can be used to generate an accelerator quality dipole field of 5 T in a 40 mm aperture as a stand-alone magnet [14].…”

Section: Introductionmentioning

confidence: 99%

Advances in the Development of a 10-kA Class REBCO Cable for the EuCARD2 Demonstrator Magnet

Badel¹,

Ballarino²,

Barth³

et al. 2016

Abstract-The objective of the EuCARD2 WP10 (Future Magnets) research activity is to demonstrate HTS magnet technology for accelerator applications, by building a short demonstrator dipole with an aperture of 40 mm, operating field of 5 T, and understood field quality. One of the magnet requirements is of small inductance, for use in long magnet strings, hence the superconducting cable must have large current carrying capacity, in the range of 10 kA at the operating conditions of 4.2 K and 5 T. An initial down-selection of the cable material and geometry resulted in the choice of REBCO tapes assembled in a Roebel cable as baseline layout. In this paper we describe the requirements derived from magnet design, the selection process that led to the choice of material and geometry, the reference design of the cable, and its options. Activities have started to address fundamental issues, such as tape performance and tape processing through the cable construction, and key performance parameters such as cable critical current under stress or magnetization. Here we report the main highlights from this work.

“…The industrial scale improvement of coated conductors in both transport and mechanical properties is especially promising, and has already encouraged large scale applications to invest in the realization of the HTS Automatically generated dates of receipt and acceptance will be placed here; authors do not produce these dates. This work was supported in part by the French Agence Nationale pour la Recherche under the SUPERSMES project, the European Commission under the FP7 Research Infrastructures projects EuCARD [6]. Within the EuCARD European Project, there was activities aimed to investigate the feasibility of a 6 T HTS insert in a 13 T Nb3Sn dipole [7] that now continues with the project EuCARD2 [8].…”

Section: Introductionmentioning

confidence: 99%

Performance Tests of Prototype High-Field HTS Coils in Grenoble

Miyoshi¹,

Badel²,

Chaud³

et al. 2015

Abstract--Longitudinal and transverse quench propagation tests were performed at LNCMI high field test facility on instrumented double pancake coils fabricated by CEA-Saclay using co-wound HTS tapes. Energy deposited on an embedded heater initiated a quench and its subsequent propagations. Following the resulting thermo-mechanical analysis, a conductor design with stacked HTS tapes co-wound with stabilizers was conceived. A 10-turn demonstrator racetrack coil has been fabricated from the stacked HTS conductor with an aim to investigate the operation margin of an HTS coil in a background magnetic field misaligned from the coil axis as expected for the operating condition of an accelerator magnet insert.A test set up with a high current capacity up to 3 kA and angular variability that utilizes a room temperature ø 376 mm bore 10 T resistive magnet at LNCMI in Grenoble has been built. The performances and operation margin of the racetrack coil were investigated. IndexTerms-High-field magnet, High-temperature superconductors (HTS), HTS coils, HTS quench propagation,