Abstract
This paper describes a “permanent” high-temperature superconducting (HTS) magnet system that combines the simplicity and ease of operation of a ferromagnetic permanent magnet with the strength capability and versatility in field generation of an electromagnet. Once energized and producing a desired field, the system, without coupled to a cooling source, can maintain the field for a long period. This HTS magnet is particularly suitable for a on-board or portable unit requiring a constant field and where “permanence” means a duration of hours, days, weeks, months, or perhaps years. The system’s other features are “recooling” and “recharging” capabilities designed to have the system: 1) recooled while it maintains its constant field to make, through periodic recooling cycles, the field literally permanent; and 2) recharged if its upper operating temperature is exceeded and the field decays. Also described are key design and operational issues as well as areas of future R&D.
Published Version
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