Test results for a high field (13 T) Nb/sub 3/Sn dipole

McInturff, A.D.; Benjegerdes, R.; Bish, P.; Caspi, S.; Chow, K.; Dell'Orco, D.; Dietderich, D.R.; Hannaford, R.; Harnden, W.; Higley, H.; Lietzke, A.F.; Morrison, L.; Morrison, M.; Scanlan, R.M.; Smithwick, J.; Taylor, C.; Oort, J. van

doi:10.1109/pac.1997.753158

Cited by 39 publications

(37 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, for Nb 3 Sn, with its brittleness and large sensitivity to strain, [59][60][61][62], and by Lawrence Berkeley National Laboratory, Berkeley, CA, USA (LBNL), at the National High Magnetic Field Laboratory in Tallahassee, FL, USA in an 11 T split pair magnet [63,65]. These measurements were performed to establish the acceptable load limits for the first Nb 3 Sn dipole magnets poised to surpass the 10.5 T magnetic field record of dipoles made using Nb-Ti technology [44,69], namely Twente's 11 T MSUT magnet [70] and LBNL's 13.5 T D20 [71]. The data from the different transverse pressure systems are comparable [33], and established the 150-200 MPa load limit for Nb 3 Sn accelerator magnets which is still used.…”

Section: Transverse Pressure On Cablesmentioning

confidence: 99%

Superconducting Materials and Conductors: Fabrication and Limiting Parameters

Bottura

Godeke

2012

Rev. Accl. Sci. Tech.

View full text Add to dashboard Cite

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.

show abstract

Section: Transverse Pressure On Cablesmentioning

confidence: 99%

Superconducting Materials and Conductors: Fabrication and Limiting Parameters

Bottura

Godeke

2012

Rev. Accl. Sci. Tech.

View full text Add to dashboard Cite

show abstract

“…Due to using the same current profile for both computations, we neglect the impact from the variation of currents between the models due to the normal zone resistance existing in FEA. Often, this similar approach is utilized when the maximum hot spot temperature is approximated from measured current decay curve [3], [30].…”

Section: B Computation Of Miitsmentioning

confidence: 99%

Hot Spot Temperature in an HTS Coil: Simulations With MIITs and Finite Element Method

Haro

Stenvall

Nugteren

et al. 2015

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

Abstract-MIITs, a zero-dimensional concept to study hot spot temperature, has been previously used to estimate hot spot temperatures and quench heater delays in NbTi and Nb3Sn magnets. However, quench behaviour is completely different in high temperature superconducting (HTS) magnets due to the slow normal zone propagation velocity and high temperature margin. Because MIITs concept does not take into account thermal diffusion in the magnet, opposite to the finite element method (FEM) analysis, the difference of these concepts is studied in this paper. Here we have taken the approach to compute the hot spot temperatures for a future HTS magnet, designed to be built from REBCO Roebel cable, with MIITs and FEM simulations. The magnet protection is accomplished with a dump resistor, and the effect of quench detection threshold voltage on the hot spot temperature has been studied. Furthermore, the inductance of the magnet increases with the magnet length. Thus, there exists a maximum inductance of the magnet which should not be exceeded to be able to protect the magnet only with a dump resistor. The hot spot temperatures with different values of inductance are also studied in this paper. Our simulations show, that the hot spot temperatures computed with MIITs are from 60 K to 150 K higher than those of FEM analysis. Thus, MIITs concept seems unreliable when considering hot spot temperatures in HTS magnets protected with only dump resistors. However, MIITs concept might be a usable tool when comparing different magnet designs. If 400 K is the upper limit for the hot spot temperature and the protection scheme includes only a dump resistor, the length of the investigated magnet can be increased to only such value that the magnet inductance is at most 50 mH.

show abstract

“…We then make a first proposal for a 15 T magnet based on Nb 3 Sn and Nb-Ti. Two 1-m-long magnets D20 [5] and HD2 [6] and have the record of dipole field ~13.5 T: here we consider these layouts in a two-in-one version to see the ultimate limit for these designs. We also present the first analysis of protection aspects related to hotspot temperature, finding a requirement on the stabilizer content for the HTS.…”

Section: Introductionmentioning

confidence: 99%

Dipoles for High-Energy LHC

Todesco

Bottura

Rijk

et al. 2014

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

-For the High Energy LHC, a study of a 33 TeV center of mass collider in the LHC tunnel, main dipoles of 20 T operational field are needed. In this paper we first review the conceptual design based on block coil proposed in the Malta workshop, addressing the issues related to coil fabrication and assembly. We then propose successive simplifications of this design, associating a cost estimate of the conductor. We then analyse a block layout for a 15 T magnet. Finally, we consider two layouts based on the D20 and HD2 short models built by LBL. A first analysis of the aspects related to protection of these challenging magnets is given.

show abstract

Test results for a high field (13 T) Nb/sub 3/Sn dipole

Cited by 39 publications

References 2 publications

Superconducting Materials and Conductors: Fabrication and Limiting Parameters

Superconducting Materials and Conductors: Fabrication and Limiting Parameters

Hot Spot Temperature in an HTS Coil: Simulations With MIITs and Finite Element Method

Dipoles for High-Energy LHC

Contact Info

Product

Resources

About