Comparison of Traditional Iron-Dominated and Canted Cosine Theta Dipoles for PbLi Loop

Earle E. Burkhardt, Robert C. Duckworth, Sergey Smolentsev

Research output: Contribution to journalArticlepeer-review

Abstract

A lead-lithium (PbLi) flow loop design is being carried out at Oak Ridge National Laboratory. PbLi is the most likely candidate for liquid tritium breeder material of fusion reactors, and a deuterium-tritium reaction is one of the leading candidates for fusion reactions. Although deuterium is found naturally, tritium is not. The project will develop a simulation workflow and design a flowing PbLi corrosion loop with a dipole magnetic field and surface heating in the test section, reaching prototypical fusion blanket conditions. The magnetic field requirements for the dipole are: maximum field of 4 Tesla, a good-field region (GFR) that is 200 mm by 200 mm and 1.5 m long, < % non-uniformity and the ability to operate the magnet with the magnetic axis both horizontal and vertical. Two options are being considered: (1) a traditional iron-dominated dipole with rectangular coils and an iron yoke that includes pole tips, and (2) a canted cosine theta (CCT) dipole with an iron yoke. Although the CCT dipole is much more compact and requires a significantly smaller yoke for magnetic shielding, it does not allow easy access to the test section. This paper discusses the advantages and disadvantages of each design.

Original languageEnglish
JournalIEEE Transactions on Applied Superconductivity
DOIs
StateAccepted/In press - 2025

Keywords

  • Fusion magnets
  • plasma applications
  • superconducting magnets

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