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 High-Temperature Superconducting Non-Insulation Closed-Loop Coils for Electro-Dynamic Suspension System

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 1980
Author(s):  
Li Lu ◽  
Wei Wu ◽  
Xin Yu ◽  
Zhijian Jin
Keyword(s):  
High Temperature ◽  
Liquid Helium ◽  
High Speed ◽  
Closed Loop ◽  
Permanent Magnets ◽  
Superconducting Magnets ◽  
Current Mode ◽  
Persistent Current ◽  
Magnetomotive Force ◽  
High Temperature Superconducting

The null-flux electro-dynamic suspension (EDS) system is a feasible high-speed maglev system with speeds of above 600 km/h. Owing to their greater current-carrying capacity, superconducting magnets can provide a super-magnetomotive force that is required for the null-flux EDS system, which cannot be provided by electromagnets and permanent magnets. Relatively mature high-speed maglev technology currently exists using low-temperature superconducting (LTS) magnets as the core, which works in the liquid helium temperature region (T ⩽ 4.2 K). Second-generation (2G) high-temperature superconducting (HTS) magnets wound by REBa2Cu3O7−δ (REBCO, RE = rare earth) tapes work above the 20 K region and do not rely on liquid helium, which is rare on Earth. In this study, the HTS non-insulation closed-loop coils module was designed for an EDS system and excited with a persistent current switch (PCS). The HTS coils module can work in the persistent current mode and exhibit premier thermal quenching self-protection. In addition, a full-size double-pancake (DP) module was designed and manufactured in this study, and it was tested in a liquid nitrogen (LN2) environment. The critical current of the DP module was approximately 54 A, and it could work in the persistent current mode with an average decay rate measured over 12 h of 0.58%/day.

scholarly journals A Coupled A–H Formulation for Magneto-Thermal Transients in High-Temperature Superconducting Magnets

2020 ◽  
Vol 30 (5) ◽  
pp. 1-11 ◽  
Author(s):  
Lorenzo Bortot ◽  
Bernhard Auchmann ◽  
Idoia Cortes Garcia ◽  
Herbert De Gersem ◽  
Michal Maciejewski ◽  
...  
Keyword(s):  
High Temperature ◽  
Superconducting Magnets ◽  
Thermal Transients ◽  
High Temperature Superconducting ◽  
H Formulation

Study of second-generation high-temperature superconducting magnets: the self-field screening effect

2014 ◽  
Vol 27 (9) ◽  
pp. 095010 ◽  
Author(s):  
Min Zhang ◽  
Weijia Yuan ◽  
David K Hilton ◽  
Matthieu Dalban Canassy ◽  
Ulf P Trociewitz
Keyword(s):  
High Temperature ◽  
Second Generation ◽  
Superconducting Magnets ◽  
The Self ◽  
Screening Effect ◽  
Field Screening ◽  
High Temperature Superconducting

scholarly journals Superconducting Magnets for Particle Accelerators

2012 ◽  
Vol 05 ◽  
pp. 51-89 ◽  
Author(s):  
Lucio Rossi ◽  
Luca Bottura
Keyword(s):  
Large Scale ◽  
Superconducting Magnets ◽  
Future Generation ◽  
High Energy ◽  
Particle Accelerators ◽  
Rf Cavities ◽  
Very High Energy ◽  
History Of ◽  
Superconducting Accelerator ◽  
Very High

Superconductivity has been the most influential technology in the field of accelerators in the last 30 years. Since the commissioning of the Tevatron, which demonstrated the use and operability of superconductivity on a large scale, superconducting magnets and rf cavities have been at the heart of all new large accelerators. Superconducting magnets have been the invariable choice for large colliders, as well as cyclotrons and large synchrotrons. In spite of the long history of success, superconductivity remains a difficult technology, requires adequate R&D and suitable preparation, and has a relatively high cost. Hence, it is not surprising that the development has also been marked by a few setbacks. This article is a review of the main superconducting accelerator magnet projects; it highlights the main characteristics and main achievements, and gives a perspective on the development of superconducting magnets for the future generation of very high energy colliders.

scholarly journals Advance and challenge of secondary-generation high- temperature superconducting tapes for high field applications

2018 ◽  
Vol 64 (8) ◽  
pp. 827-841 ◽  
Author(s):  
Chuanbing Cai ◽  
Changxin Chi ◽  
Minjuan Li ◽  
Zhiyong Liu ◽  
Yumin Lu ◽  
...  
Keyword(s):  
High Temperature ◽  
High Field ◽  
Superconducting Tapes ◽  
High Temperature Superconducting
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