U.S. Department of EnergyOffice of Scientific and Technical Information
SPEAR3 Gradient Dipole Core Fabrication
Abstract
Traditional means of core fabrication are to glue the laminations or weld them to form the yoke structure. These means result in good yoke assemblies for shorter (<0.6m) magnets. However, because of weld distortions or mechanical strength limitations, welding and/or gluing techniques are difficult to gain high mechanical precision for longer cores. The SPEAR3 gradient dipoles are up to 1.45m long and require distortions of <0.05mm. Therefore, the SPEAR3 gradient dipole core design incorporated an assembly technique, originally devised for the PEPII insertion quadrupoles and later adapted for the ALS gradient magnets. This technique involved fabricating a rigid frame for the core, precisely stacking and compressing the laminations using hydraulic jacks and granite surfaces and straight edges, and fixing the laminations in the frame by filling the grooves between the laminations and frame using steel loaded epoxy. Although this technique has been used in the past, it has never been fully described and published. This paper is written to provide a detailed description of the procedure and to present measurement data demonstrating the mechanical precision and stiffness of the resulting product.
- Authors:
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (US)
- OSTI Identifier:
- 815234
- Report Number(s):
- SLAC-PUB-10079
TRN: US200319%%113
- DOE Contract Number:
- AC03-76SF00515
- Resource Type:
- Technical Report
- Resource Relation:
- Other Information: PBD: 29 Jul 2003
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; ACCURACY; DESIGN; DIPOLES; FABRICATION; FLEXIBILITY; GRANITES; HYDRAULICS; MAGNETS; QUADRUPOLES; STEELS; WELDING
Citation Formats
Li, Nanyang. SPEAR3 Gradient Dipole Core Fabrication. United States: N. p., 2003.
Web. doi:10.2172/815234.
Li, Nanyang. SPEAR3 Gradient Dipole Core Fabrication. United States. https://doi.org/10.2172/815234
Li, Nanyang. 2003.
"SPEAR3 Gradient Dipole Core Fabrication". United States. https://doi.org/10.2172/815234. https://www.osti.gov/servlets/purl/815234.
@article{osti_815234,
title = {SPEAR3 Gradient Dipole Core Fabrication},
author = {Li, Nanyang},
abstractNote = {Traditional means of core fabrication are to glue the laminations or weld them to form the yoke structure. These means result in good yoke assemblies for shorter (<0.6m) magnets. However, because of weld distortions or mechanical strength limitations, welding and/or gluing techniques are difficult to gain high mechanical precision for longer cores. The SPEAR3 gradient dipoles are up to 1.45m long and require distortions of <0.05mm. Therefore, the SPEAR3 gradient dipole core design incorporated an assembly technique, originally devised for the PEPII insertion quadrupoles and later adapted for the ALS gradient magnets. This technique involved fabricating a rigid frame for the core, precisely stacking and compressing the laminations using hydraulic jacks and granite surfaces and straight edges, and fixing the laminations in the frame by filling the grooves between the laminations and frame using steel loaded epoxy. Although this technique has been used in the past, it has never been fully described and published. This paper is written to provide a detailed description of the procedure and to present measurement data demonstrating the mechanical precision and stiffness of the resulting product.},
doi = {10.2172/815234},
url = {https://www.osti.gov/biblio/815234},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jul 29 00:00:00 EDT 2003},
month = {Tue Jul 29 00:00:00 EDT 2003}
}