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Title: 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}
}

Conference:
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