Field enhancement of a 12. 5-T magnet using holmium poles
Abstract
Unlike conventional ferromagnetic materials such as iron and Supermendur, which produce saturation magnetization fields of approximately 2 T, several of the rare-earth elements (holmium, terbium, erbium, gadolinium, and dysprosium) yield saturated fields of nearly 4 T. This property makes these rare-earth metals particularly attractive as flux concentrators for use in superconducting magnets. This report concerns the use of holmium inserts to enhance the peak useful field of the nominally 12.5-T, 5-cm-bore tape magnet manufactured by the Intermagnetics General Corporation (IGC). Nonlinear magnetostatic analysis indicates that this field increases to nearly 16 T with the rare-earth poles inserted within the bore on both sides of the coil's split-plane radial access gap. This paper focuses on computer modeling methods and experimental results.
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab., CA (USA); Lawrence Berkeley Lab., CA (USA)
- OSTI Identifier:
- 6764078
- Report Number(s):
- UCRL-90638; CONF-840937-2
ON: DE84017415
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Conference
- Resource Relation:
- Conference: Applied superconductivity conference, San Diego, CA, USA, 9 Sep 1984; Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; SUPERCONDUCTING MAGNETS; MAGNETIC FLUX; MODIFICATIONS; HOLMIUM; ELECTRICAL EQUIPMENT; ELECTROMAGNETS; ELEMENTS; EQUIPMENT; MAGNETS; METALS; RARE EARTHS; SUPERCONDUCTING DEVICES; 420201* - Engineering- Cryogenic Equipment & Devices
Citation Formats
Hoard, R W, Mance, S C, Leber, R L, Dalder, E N, Chaplin, M R, Blair, K, Nelson, D H, and Van Dyke, D A. Field enhancement of a 12. 5-T magnet using holmium poles. United States: N. p., 1984.
Web.
Hoard, R W, Mance, S C, Leber, R L, Dalder, E N, Chaplin, M R, Blair, K, Nelson, D H, & Van Dyke, D A. Field enhancement of a 12. 5-T magnet using holmium poles. United States.
Hoard, R W, Mance, S C, Leber, R L, Dalder, E N, Chaplin, M R, Blair, K, Nelson, D H, and Van Dyke, D A. 1984.
"Field enhancement of a 12. 5-T magnet using holmium poles". United States. https://www.osti.gov/servlets/purl/6764078.
@article{osti_6764078,
title = {Field enhancement of a 12. 5-T magnet using holmium poles},
author = {Hoard, R W and Mance, S C and Leber, R L and Dalder, E N and Chaplin, M R and Blair, K and Nelson, D H and Van Dyke, D A},
abstractNote = {Unlike conventional ferromagnetic materials such as iron and Supermendur, which produce saturation magnetization fields of approximately 2 T, several of the rare-earth elements (holmium, terbium, erbium, gadolinium, and dysprosium) yield saturated fields of nearly 4 T. This property makes these rare-earth metals particularly attractive as flux concentrators for use in superconducting magnets. This report concerns the use of holmium inserts to enhance the peak useful field of the nominally 12.5-T, 5-cm-bore tape magnet manufactured by the Intermagnetics General Corporation (IGC). Nonlinear magnetostatic analysis indicates that this field increases to nearly 16 T with the rare-earth poles inserted within the bore on both sides of the coil's split-plane radial access gap. This paper focuses on computer modeling methods and experimental results.},
doi = {},
url = {https://www.osti.gov/biblio/6764078},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Sep 07 00:00:00 EDT 1984},
month = {Fri Sep 07 00:00:00 EDT 1984}
}