Development of a large aperture Nb/sub 3/Sn racetrack quadrupole magnet

Ferracin, P.; Bartlett, S.E.; Caspi, S.; Dietderich, D.R.; Gourlay, S.A.; Hannaford, C.R.; Hafalia, A.R.; Lietzke, A.F.; Mattafirri, S.; McInturff, A.D.; Nyman, M.; Sabbi, G.

doi:10.1109/tasc.2005.849511

Cited by 24 publications

(15 citation statements)

References 14 publications

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“…The role of the Lorentz loads in this compromise becomes more important in high-field magnets, where the use of brittle Nb 3 Sn and HTS conductors results in magnet designs that are stress-limited to the maximum acceptable by the material. Among the possible mitigation measures, the winding of Nb 3 Sn high-field magnets is precompressed at room temperature and during cooldown, so that the peak field (and minimum margin) region unloads when the magnet is powered [47,48].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Superconducting Materials and Conductors: Fabrication and Limiting Parameters

Bottura

Godeke

2012

Rev. Accl. Sci. Tech.

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Superconductivity is the technology that enabled the construction of the most recent generation of high-energy particle accelerators, the largest scientific instruments ever built. In this review we trace the evolution of superconducting materials for particle accelerator magnets, from the first steps in the late 1960s, through the rise and glory of Nb-Ti in the 1970s, till the 2010s, and the promises of Nb 3 Sn for the 2020s. We conclude with a perspective on the opportunities for high-temperature superconductors (HTSs). Many such reviews have been written in the past, as witnessed by the long list of references provided. In this review we put particular emphasis on the practical aspects of wire and tape manufacturing, cabling, engineering performance, and potential for use in accelerator magnets, while leaving in the background matters such as the physics of superconductivity and fundamental material issues.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Superconducting Materials and Conductors: Fabrication and Limiting Parameters

Bottura

Godeke

2012

Rev. Accl. Sci. Tech.

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“…In order to gain an early feed-back on conductor performance and mechanical behavior of a support structure similar to the one designed for the TQS quadrupole magnet, the Subscale Quadrupole (SQ) was fabricated and tested [10][11][12]. SQ consists of 4 racetrack coils, 0.3 m long and based on the design of the coils for the LBNL Subscale Magnet program [13], placed around an aluminum bore with a clear aperture of 110 mm (see SQ cross-section in FIGURE 1).…”

Section: Subscale Quadrupole Magnet (Sq)mentioning

confidence: 99%

LARP Nb[sub 3]Sn QUADRUPOLE MAGNETS FOR THE LHC LUMINOSITY UPGRADE

Ferracin

Weisend²

2010

AIP Conference Proceedings

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The US LHC Accelerator Research Program (LARP) is a collaboration between four US laboratories (BNL, FNAL, LBNL, and SLAC) aimed at contributing to the commissioning and operation of the LHC and conducting R&D on its luminosity upgrade. Within LARP, the Magnet Program's main goal is to demonstrate that Nb 3 Sn superconducting magnets are a viable option for a future upgrade of the LHC Interaction Regions. Over the past four years, LARP has successfully fabricated and tested several R&D magnets: 1) the subscale quadrupole magnet SQ, to perform technology studies with 300 mm long racetrack coils, 2) the technology quadrupole TQ, to investigate support structure behavior with 1 m long cos2θ coils, and 3) the long racetrack magnet LR, to test 3.6 m long racetrack coils. The next milestone consists in the fabrication and test of the 3.7 m long quadrupole magnet LQ, with the goal of demonstrating that Nb 3 Sn technology is mature for use in high energy accelerators. After an overview of design features and test results of the LARP magnets fabricated so far, this paper focuses on the status of the fabrication of LQ: we describe the production of the 3.4 m long cos2θ coils, and the qualification of the support structure. Finally, the status of the development of the next 1 m long model HQ, conceived to explore stress and field limits of Nb 3 Sn superconducting magnets, is presented.

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“…1, right), composed of four aluminum rods and two end plates, was used to reduce the conductor motion in the end region. A detailed description of the magnet structure, the assembly procedure, and the main parameters is given in [5]. …”

Section: Magnet Designmentioning

confidence: 99%

“…After the test at LBNL, reported in [5], the magnet was disassembled, inspected and reassembled. In January 2005, a second test was performed at FNAL, as part of the LARP Supporting R&D effort.…”

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confidence: 99%

Assembly and Tests of SQ02, a Nb$_{3}$Sn Racetrack Quadrupole Magnet for LARP

Ferracin

Ambrosio

Barzi

et al. 2007

IEEE Trans. Appl. Supercond.

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Abstract-The US LHC Accelerator Research Program (LARP) consists of four US laboratories (BNL, FNAL, LBNL,and SLAC) collaborating with CERN to achieve a successful commissioning of the LHC and to develop the next generation of Interaction Region magnets. In 2004, a large aperture Nb 3 Sn racetrack quadrupole magnet (SQ01) has been fabricated and tested at LBNL. The magnet utilized four subscale racetrack coils and was instrumented with strain gauges on the support structure and directly over the coil's turns. SQ01 exhibited training quenches in two of the four coils and reached a peak field in the conductor of 10.4 T at a current of 10.6 kA. After the test, the magnet was disassembled, inspected with pressure indicating films, and reassembled with minor modifications. A second test (SQ01b) was performed at FNAL and included training studies, strain gauge measurements and magnetic measurements. Magnet inspection, test results, and magnetic measurements are reported and discussed, and a comparison between strain gauge measurements and 3D finite element computations is presented.

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Development of a large aperture Nb/sub 3/Sn racetrack quadrupole magnet

Cited by 24 publications

References 14 publications

Superconducting Materials and Conductors: Fabrication and Limiting Parameters

Superconducting Materials and Conductors: Fabrication and Limiting Parameters

LARP Nb[sub 3]Sn QUADRUPOLE MAGNETS FOR THE LHC LUMINOSITY UPGRADE

Assembly and Tests of SQ02, a Nb$_{3}$Sn Racetrack Quadrupole Magnet for LARP

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