Design analysis of a solid nitrogen cooled "permanent" high-temperature superconducting magnet system

Benjamin J. Haid, Haigun Lee, Yukikazu Iwasa, Sang Soo Oh, Young Kil Kwon, Kang Sik Ryu

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Potential performance advantages of a solid nitrogen cooled "permanent" high-temperature superconducting (SN2/HTS) magnet system over a liquid helium cooled low-temperature superconducting (LHe/LTS) system are explored. The SN2/HTS system design includes a second solid heat capacitor that cools a radiation shield. Recooling of the heat capacitors is performed with a demountable cryocooler. The SN2/HTS system offers both enhanced stability and improved portability over a LHe/LTS system. Design codes are constructed to compare the SN2/HTS system design with a LHe/LTS design for a general permanent superconducting magnet system employing a room temperature bore. The codes predict the system volume and mass that should be expected for a given set of design requirements, i.e. field strength and bore size, and a given set of conductor properties. The results indicate that present HTS conductor critical current and index are not yet sufficient for producing SN2/HTS systems of a size that is comparable with that expected for a LHe/LTS system; however, the conductor properties of Bi2223/Ag have been consistently improving, and new HTS conductors are expected to be developed in the near future. The codes are used to determine the minimum Bi2223/Ag conductor performance required for a SN2/HTS system to be competitive with a LHe/LTS system.

Original languageEnglish
Pages (from-to)617-634
Number of pages18
JournalCryogenics
Volume42
Issue number10
DOIs
Publication statusPublished - 2002 Oct 1
Externally publishedYes

Fingerprint

solid nitrogen
design analysis
Superconducting magnets
superconducting magnets
liquid helium
Helium
Nitrogen
conductors
Liquids
systems engineering
capacitors
Temperature
heat
cavities
Capacitors
Systems analysis
permanent magnets
field strength
critical current
Critical currents

Keywords

  • HTS magnet
  • Persistent mode
  • Solid nitrogen

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Design analysis of a solid nitrogen cooled "permanent" high-temperature superconducting magnet system. / Haid, Benjamin J.; Lee, Haigun; Iwasa, Yukikazu; Oh, Sang Soo; Kwon, Young Kil; Ryu, Kang Sik.

In: Cryogenics, Vol. 42, No. 10, 01.10.2002, p. 617-634.

Research output: Contribution to journalArticle

Haid, Benjamin J. ; Lee, Haigun ; Iwasa, Yukikazu ; Oh, Sang Soo ; Kwon, Young Kil ; Ryu, Kang Sik. / Design analysis of a solid nitrogen cooled "permanent" high-temperature superconducting magnet system. In: Cryogenics. 2002 ; Vol. 42, No. 10. pp. 617-634.
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