The generation of 25.05 T using a 5.11 T Bi2Sr2CaCu2Oxsuperconducting insert magnet

Weijers, H.W.; Trociewitz, U.P.; Marken, K.R.; Meinesz, M.; Miao, Hanping; Schwartz, J.

doi:10.1088/0953-2048/17/4/012

Cited by 112 publications

(67 citation statements)

References 20 publications

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“…[ 32 ] More recently, a 20 mm 9.8T solenoid made from 2G YBCO tape with tested in a 19T background field [ 33 ].…”

Section: Existing High Field Solenoidsmentioning

confidence: 99%

Muon Collider Task Force Report

Ankenbrandt¹,

Alexahin²,

Balbekov³

et al. 2007

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A summary is given of results from the first year of Muon Collider Task Force activities, together with a description of an updated longer-term R&D plan. In particular, this report summarizes Muon Collider ring and ionization cooling channel design and simulation studies, progress towards testing a high-pressure RF cavity in a beam at the Muon Test Area, Helical Cooling Channel design and simulation studies, progress towards a fourcoil helical solenoid test, design considerations for a 6D cooling experiment, and High Temperature Superconductor magnet and conductor studies for a high field solenoid at the end of a Muon Collider cooling channel. 2 Executive SummaryMuon Colliders offer a possible long term path to lepton-lepton collisions at center-ofmass energies s 1 TeV. In October 2006 the Muon Collider Task Force (MCTF) proposed a program of advanced accelerator R&D aimed at developing the Muon Collider concept. The proposed R&D program was motivated by progress on Muon Collider design in general, and in particular, by new ideas that have emerged on muon cooling channel design. The scope of the proposed MCTF R&D program includes muon collider design studies, helical cooling channel design and simulation, high temperature superconducting solenoid studies, an experimental program using beams to test cooling channel RF cavities and a 6D cooling demonstration channel. The first year of MCTF activities are summarized in this report together with a brief description of the anticipated FY08 R&D activities. Muon Collider Design Studies:An important goal for the MCTF activity is, within the next two to three years, to establish one or more realizable muon collider parameter set(s), and hence identify the performance goals for the muon cooling channel. Past physics studies have shown that a Muon Collider with s = 1 TeV to a few TeV requires a minimum luminosity of ~ 10 34 cm -2 s -1 to probe with adequate sensitivity the physics beyond the Standard Model. Two design strategies are being investigated to achieve this luminosity. In the "high-emittance" strategy the muons of each sign are packaged in the minimum number of bunches (one per cycle) and the emittance goal corresponds to the beam-beam limit. In the "low-emittance" strategy the muons are packaged into many bunches with much lower transverse emittances. To establish the feasibility of the highand/or low-emittance schemes it is necessary to establish the existence of corresponding Collider Lattice designs that assume realistic parameters for magnets, rf, etc. Ring studies this year explored various lattices, paying attention to chromatic correction and momentum acceptance. The designs for the high-emittance lattice are close to achieving the desired momentum acceptance and dynamic aperture, although further studies are needed. However, new ideas are needed to achieve a ring design that corresponds to the low emittance collider scheme.Cooling Channel Design and Simulation: In addition to different collider design strategies (low-or high-emittance), different...

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“…[ 32 ] More recently, a 20 mm 9.8T solenoid made from 2G YBCO tape with tested in a 19T background field [ 33 ].…”

Section: Existing High Field Solenoidsmentioning

confidence: 99%

Muon Collider Task Force Report

Ankenbrandt¹,

Alexahin²,

Balbekov³

et al. 2007

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“…This requires further study. The heat treated coils W2, W3, and W4 were epoxy impregnated by our collaborators at NHMFL using equipment and procedures established for our 5 T 2212 insert coil which reached 25 T [5].…”

Section: Small Coil Developmentmentioning

confidence: 99%

Cost Effective Open Geometry HTS MRI System amended to BSCCO 2212 Wire for High Field Magnets

Marken¹

2006

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BackgroundThe original goal of this Phase II Superconductivity Partnership Initiative project was to build and operate a prototype Magnetic Resonance Imaging (MRI) system using HTS coils wound from continuously processed dip-coated BSCCO 2212 tape conductor. MRI is the largest existing commercial application of superconductors. In 1999 -2000 a business opportunity was perceived for competitively priced, superconducting MRI systems having an open architecture to allow patient comfort and easy access by medical personnel. At that time, open architecture MRI was the fastest growing segment of the market. Most open geometry systems of the time were not superconducting, because of the complex cryogenic systems needed for liquid helium cooling of low temperature superconducting (LTS) magnets, while still allowing open access to the high field region. However, superconducting systems offer distinct advantages in terms of field quality and field strength, and therefore obtainable image quality. Although the feasibility of making conduction cooled HTS MRI coils from multifilamentary BSCCO-2223 conductors had already been shown at that time, the price of the 2223 tape was (and remains) too high. However, BSCCO-2212 can be melt processed and thus can be made as an inexpensive slurry coated conductor, without the need for labor intensive powder-in-tube deformation processing.Cost estimates showed that dip-coated 2212 tape would have labor and materials costs that are between 10 and 25% of those for multifilamentary 2223 tape. In addition, capital costs are significantly lower. Thus there were compelling reasons to explore the possibility of using dip-coated tape. The melt processing of 2212, which is not feasible with 2223, is what makes the lower cost, coated conductor format a possibility; however, the technical methods for continuously melt processing long lengths needed to be established. One of this program's original aims was to verify that uniform properties, including current density, physical dimensions, and mechanical strength, could be achieved in long lengths of this tape.Using dip-coated tape, the plan was for MRI magnet coils to be wound to fit an established commercial open geometry, 0.2 Tesla permanent magnet system. New electronics and imaging software for a prototype higher field superconducting system would have added significantly to the cost. However, the use of the 0.2 T platform would allow the technical feasibility and the cost issues for HTS systems to be fully established. Also it would establish the energy efficiency and savings of HTS open MRI compared with resistive and permanent magnet systems. The commercial goal was an open geometry HTS MRI running at 0.5 T and 20 K.It was expected that success with this prototype system would lead to lower costs and increased performance for open geometry MRI. This progress was expected to result in a greatly expanded market for the low cost end of MRI applications. This could have very

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“…Based on performance, available length and potential for further improvement, it is a likely material to enable superconducting magnets generating above 25 T [12]. For a number of years, Bi2212 research and development focused on very wide, thin, tape conductors, with aspect ratios on the order of 20 or higher and relatively low filament counts [13][14][15][16][17][18][19]. These conductors are highly anisotropic with respect to their electromagnetic properties, and geometrically well suited for magnetic field processing.…”

Section: Introductionmentioning

confidence: 99%

“…The react&wind (R&W) approach is typically used for NbTi magnets while the wind&react (W&R) approach was developed for Nb 3 Sn due to its intrinsic strain sensitivity. For Bi2212, both methods have been used [14,16] but each has fundamental limitations. To improve upon Bi2212 magnet manufacturing, a new approach has recently been developed, react-wind-sinter (RWS), to avoid the primary issues that limit W&R and R&W manufacturing.…”

Section: Introductionmentioning

confidence: 99%

On the influence of magnetic field processing on the texture, phase assemblage and properties of low aspect ratio Bi₂Sr₂CaCu₂O_x/AgMg wire

Liu

Schwartz

2009

Science and Technology of Advanced Materials

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Bi 2 Sr 2 CaCu 2 O x /AgMg conductors are potentially important for many applications up to 20 K, including magnets for cryogen-free magnetic resonance imaging and high field nuclear magnetic resonance research. One promising approach to increased critical current density is partial-melt processing in the presence of a magnetic field which has been shown to enhance c-axis texturing of wide, thin tape conductors. Here, we report on low aspect ratio rectangular conductors processed in an 8 T magnetic field. The magnetic field is applied during different stages of the heat treatment process. The conductors are electrically characterized using four-point critical current measurements as a function of magnetic field and magnetic field orientation relative to the conductor. The superconductive transition and magnetization hysteresis are measured using a SQUID magnetometer. The microstructures are characterized using scanning electron microscopy and energy dispersive spectroscopy and analyzed using digital image processing. It is found that the presence of a magnetic field during split melt processing enhances the electrical transport and magnetic behavior, but that the anisotropy is not consistently affected. The magnetic field also affects development of interfilamentary Bi2212 bridges, and that this depends on the initial shape of the Bi2212 filament. At least two behaviors are identified; one impacts the oxide phase assemblage and the other impacts textured growth.

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The generation of 25.05 T using a 5.11 T Bi₂Sr₂CaCu₂O_xsuperconducting insert magnet

Cited by 112 publications

References 20 publications

Muon Collider Task Force Report

Muon Collider Task Force Report

Cost Effective Open Geometry HTS MRI System amended to BSCCO 2212 Wire for High Field Magnets

On the influence of magnetic field processing on the texture, phase assemblage and properties of low aspect ratio Bi₂Sr₂CaCu₂O_x/AgMg wire

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The generation of 25.05 T using a 5.11 T Bi2Sr2CaCu2Oxsuperconducting insert magnet

Cited by 112 publications

References 20 publications

Muon Collider Task Force Report

Muon Collider Task Force Report

Cost Effective Open Geometry HTS MRI System amended to BSCCO 2212 Wire for High Field Magnets

On the influence of magnetic field processing on the texture, phase assemblage and properties of low aspect ratio Bi2Sr2CaCu2Ox/AgMg wire

Contact Info

Product

Resources

About

The generation of 25.05 T using a 5.11 T Bi₂Sr₂CaCu₂O_xsuperconducting insert magnet

On the influence of magnetic field processing on the texture, phase assemblage and properties of low aspect ratio Bi₂Sr₂CaCu₂O_x/AgMg wire