Flux shunts for undulators
Abstract
Undulators for high-performance applications in synchrotron-radiation sources and periodic magnetic structures for free-electron lasers have stringent requirements on the curvature of the electron`s average trajectory. Undulators using the permanent magnet hybrid configuration often have fields in their central region that produce a curved trajectory caused by local, ambient magnetic fields such as those of the earth. The 4.6 m long Advanced Light Source (ALS) undulators use flux shunts to reduce this effect. These flux shunts are magnetic linkages of very high permeability material connecting the two steel beams that support the magnetic structures. The shunts reduce the scalar potential difference between the supporting beams and carry substantial flux that would normally appear in the undulator gap. Magnetic design, mechanical configuration of the flux shunts and magnetic measurements of their effect on the ALS undulators are described.
- Authors:
-
- Lawrence Berkeley Lab., CA (United States)
- Lawrence Livermore National Lab., CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley Lab., CA (United States); Lawrence Livermore National Lab., CA (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 10178345
- Report Number(s):
- LBL-33224; CONF-930511-325
ON: DE93018535; IN: LSGN-118; TRN: 93:018959
- DOE Contract Number:
- AC03-76SF00098
- Resource Type:
- Conference
- Resource Relation:
- Conference: PAC `93: international particle accelerator conference,Washington, DC (United States),17-20 May 1993; Other Information: PBD: May 1993
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; WIGGLER MAGNETS; CORRECTIONS; FREE ELECTRON LASERS; ADVANCED LIGHT SOURCE; DESIGN; MAGNETIC FIELDS; 430303; EXPERIMENTAL FACILITIES AND EQUIPMENT
Citation Formats
Hoyer, E, Chin, J, and Hassenzahl, W V. Flux shunts for undulators. United States: N. p., 1993.
Web.
Hoyer, E, Chin, J, & Hassenzahl, W V. Flux shunts for undulators. United States.
Hoyer, E, Chin, J, and Hassenzahl, W V. 1993.
"Flux shunts for undulators". United States. https://www.osti.gov/servlets/purl/10178345.
@article{osti_10178345,
title = {Flux shunts for undulators},
author = {Hoyer, E and Chin, J and Hassenzahl, W V},
abstractNote = {Undulators for high-performance applications in synchrotron-radiation sources and periodic magnetic structures for free-electron lasers have stringent requirements on the curvature of the electron`s average trajectory. Undulators using the permanent magnet hybrid configuration often have fields in their central region that produce a curved trajectory caused by local, ambient magnetic fields such as those of the earth. The 4.6 m long Advanced Light Source (ALS) undulators use flux shunts to reduce this effect. These flux shunts are magnetic linkages of very high permeability material connecting the two steel beams that support the magnetic structures. The shunts reduce the scalar potential difference between the supporting beams and carry substantial flux that would normally appear in the undulator gap. Magnetic design, mechanical configuration of the flux shunts and magnetic measurements of their effect on the ALS undulators are described.},
doi = {},
url = {https://www.osti.gov/biblio/10178345},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat May 01 00:00:00 EDT 1993},
month = {Sat May 01 00:00:00 EDT 1993}
}