High Temperature Superconductors for High Field Superconducting Magnets

2006 ◽  
Author(s):  
E. Barzi
Keyword(s):  
High Temperature ◽  
High Field ◽  
Superconducting Magnets ◽  
High Temperature Superconductors

High-field Josephson magnetic resonance in high-temperature superconductors

2006 ◽  
Vol 32 (7) ◽  
pp. 600-602
Author(s):  
L. V. Belevtsov ◽  
A. I. D’yachenko ◽  
A. A. Kostikov
Keyword(s):  
High Temperature ◽  
Magnetic Resonance ◽  
High Field ◽  
High Temperature Superconductors

scholarly journals Superconducting Accelerator Magnets Based on High-Temperature Superconducting Bi-2212 Round Wires

Instruments ◽  
2020 ◽  
Vol 4 (2) ◽  
pp. 17
Author(s):  
Tengming Shen ◽  
Laura Garcia Fajardo
Keyword(s):  
High Temperature ◽  
High Field ◽  
Scientific Discovery ◽  
Superconducting Magnets ◽  
Hadron Collider ◽  
Development Program ◽  
High Energy ◽  
Superconducting Transition ◽  
High Temperature Superconducting ◽  
Superconducting Accelerator

Superconducting magnets are an invaluable tool for scientific discovery, energy research, and medical diagnosis. To date, virtually all superconducting magnets have been made from two Nb-based low-temperature superconductors (Nb-Ti with a superconducting transition temperature Tc of 9.2 K and Nb3Sn with a Tc of 18.3 K). The 8.33 T Nb-Ti accelerator dipole magnets of the large hadron collider (LHC) at CERN enabled the discovery of the Higgs Boson and the ongoing search for physics beyond the standard model of high energy physics. The 12 T class Nb3Sn magnets are key to the International Thermonuclear Experimental Reactor (ITER) Tokamak and to the high-luminosity upgrade of the LHC that aims to increase the luminosity by a factor of 5–10. In this paper, we discuss opportunities with a high-temperature superconducting material Bi-2212 with a Tc of 80–92 K for building more powerful magnets for high energy circular colliders. The development of a superconducting accelerator magnet could not succeed without a parallel development of a high performance conductor. We will review triumphs of developing Bi-2212 round wires into a magnet grade conductor and technologies that enable them. Then, we will discuss the challenges associated with constructing a high-field accelerator magnet using Bi-2212 wires, especially those dipoles of 15–20 T class with a significant value for future physics colliders, potential technology paths forward, and progress made so far with subscale magnet development based on racetrack coils and a canted-cosine-theta magnet design that uniquely addresses the mechanical weaknesses of Bi-2212 cables. Additionally, a roadmap being implemented by the US Magnet Development Program for demonstrating high-field Bi-2212 accelerator dipole technologies is presented.

scholarly journals Non-planar coil winding angle optimization for compatibility with non-insulated high-temperature superconducting magnets

2020 ◽  
Vol 86 (5) ◽  
Author(s):  
C. Paz-Soldan
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
Cost Function ◽  
Superconducting Magnets ◽  
High Temperature Superconductors ◽  
Minimum Size ◽  
Planar Coil ◽  
Input Coil ◽  
Coil Winding ◽  
Winding Angle

The rapidly emerging technology of high-temperature superconductors (HTS) opens new opportunities for the development of non-planar non-insulated HTS magnets. This type of HTS magnet offers attractive features via its simplicity and robustness, and is well suited for modest size steady-state applications such as a mid-scale stellarator. In non-planar coil applications the HTS tape may be subject to severe hard-way bending strain ( $\epsilon _{\textrm {bend}}$ ), torsional strains ( $\epsilon _{\textrm {tor}}$ ) and magnetic field components transverse to the HTS tape plane ( $B_{\perp }$ ), all of which can limit the magnet operating space. A novel method of winding angle optimization is here presented to overcome these limitations for fixed input non-planar coil filamentary geometry. Essentially, this method: (i) calculates the peak $\epsilon _{\textrm {bend}}$ and $B_{\perp }$ for arbitrary winding angle along an input coil filamentary trajectory, (ii) defines a cost function including both and then (iii) uses tensioned splines to define a winding angle that reduces $\epsilon _{\textrm {tor}}$ and optimizes the $\epsilon _{\textrm {bend}}$ and $B_{\perp }$ cost function. As strain limits are present even without $B_{\perp }$ , this optimization is able to provide an assessment of the minimum buildable size of an arbitrary non-planar non-insulating HTS coil. This optimization finds that for standard 4 mm wide HTS tapes the minimum size coils of the existing HSX, NCSX and W7-X stellarator geometries are around 0.3–0.5 m in mean coil radius. Identifying the minimum size provides a path to specify a mid-scale stellarator capable of achieving high-field or high-temperature operation with minimal HTS tape length. For coils larger than this size, strain optimization allows use of wider (higher current capacity) HTS tapes or alternatively permitting a finite (yet tolerable) strain allows reduction of $B_{\perp }$ . Reduced $B_{\perp }$ enables a reduction of the HTS tape length required to achieve a given design magnetic field or equivalently an increase in the achievable magnetic field for fixed HTS tape length. The distinct considerations for optimizing a stellarator coilset to further ease compatibility with non-insulated HTS magnets are also discussed, highlighting relaxed curvature limits and the introduction of limits to the allowable torsion.

High field scanning Hall probe imaging of high temperature superconductors

2001 ◽  
Vol 11 (1) ◽  
pp. 3186-3189 ◽  
Author(s):  
G.K. Perkins ◽  
Yu.V. Bugoslavsky ◽  
X. Qi ◽  
J.L. MacManus-Driscoll ◽  
A.D. Caplin
Keyword(s):  
High Temperature ◽  
High Field ◽  
High Temperature Superconductors ◽  
Hall Probe

High Field Superconducting Solenoids Via High Temperature Superconductors

2008 ◽  
Vol 18 (2) ◽  
pp. 70-81 ◽  
Author(s):  
J. Schwartz ◽  
T. Effio ◽  
Xiaotao Liu ◽  
Q.V. Le ◽  
A.L. Mbaruku ◽  
...  
Keyword(s):  
High Temperature ◽  
High Field ◽  
High Temperature Superconductors

scholarly journals Maglev Goes to Work

2006 ◽  
Vol 128 (06) ◽  
pp. 39-41
Author(s):  
Alan S. Brown
Keyword(s):  
High Temperature ◽  
Superconducting Magnets ◽  
High Temperature Superconductors ◽  
Barium Copper Oxide ◽  
Oxide Superconductors ◽  
Maglev Train ◽  
Central Japan ◽  
Barium Copper ◽  
Yttrium Barium ◽  
Copper Oxide Superconductors

This article discusses various features of a mixer that proves to be advantageous for pharmaceutical market. Central Japan Railway Co. has tested the first-ever maglev train using high-temperature superconductors; the technology that is still a long way from practical commercialization. Instead, LevTech Inc., a Lexington, Ky., startup is using yttrium-barium-copper oxide superconductors to suspend impellers in mixers and pumps for the bioprocessing and pharmaceutical industry. The LevTech mixer's cassette holds six superconducting magnets, which suspend and lock into place an impeller that can be isolated in a pre-sterilized mixing bag. Rotating the cassette turns the impeller, which stirs the biochemicals inside the sealed bag. According to JR Central, superconductors have certain advantages over conventional electromagnets. First, they are much lighter. This improves railcar acceleration, speed, and payload; they also use less energy and more importantly, though, their 1 Tesla magnetic fields can lift a train 3 to 4 inches off the track, compared to 0.3 to 0.4 inch achieved with ordinary electromagnets.

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