Current-carrying element based on second-generation high-temperature superconductor for the magnet system of a fusion neutron source

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• 作者：M. S. Novikov ; D. P. Ivanov ; S. I. Novikov ; S. A. Shuvaev
• 关键词：helical heavy ; current HTS current ; carrying element ; toroidal magnet systems ; fusion neutrons source
• 刊名：Physics of Atomic Nuclei
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：78
• 期：10
• 页码：1148-1154
• 全文大小：1,651 KB
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• 作者单位：M. S. Novikov (1)
  D. P. Ivanov (1)
  S. I. Novikov (1)
  S. A. Shuvaev (1)
  
  1. National Research Center Kurchatov Institute, pl. Akademika Kurchatova 1, Moscow, 123182, Russia
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Elementary Particles and Nuclei
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1562-692X

文摘

Application of current-carrying elements (CCEs) made of second-generation high-temperature superconductor (2G HTS) in magnet systems of a fusion neutron source (FNS) and other fusion devices will allow their magnetic field and thermodynamic stability to be increased substantially in comparison with those of low-temperature superconductor (LTS) magnets. For a toroidal magnet of the FNS, a design of a helical (partially transposed) CCE made of 2G HTS is under development with forced-flow cooling by helium gas, a current of 20–30 kA, an operating temperature of 10–20 K, and a magnetic field on the winding of 12–15 T (prospectively ~20 T). Short-sized samples of the helical flexible heavy-current CCE are being fabricated and investigated; a pilot-line unit for production of long-sized CCE pieces is under construction. The applied fabrication technique allows the CCE to be produced which combines a high operating current, thermal and mechanical stability, manufacturability, and low losses in the alternating modes. The possibility of fabricating the CCE with the outer dimensions and values of the operating parameter required for the FNS (and with a significant margin) using already available serial 2G HTS tapes is substantiated. The maximum field of toroidal magnets with CCEs made of 2G HTS will be limited only by mechanical properties of the magnet’s casing and structure, while the thermal stability will be approximately two orders of magnitude higher than that of toroidal magnets with LTS-based CCEs. The helical CCE made of 2G HTS is very promising for fusion and hybrid electric power plants, and its design and technologies of production, as well as the prototype coils made of it for the FNS and other tokamaks, are worth developing now. Keywords helical heavy-current HTS current-carrying element toroidal magnet systems fusion neutrons source