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Proceedings Paper

Development of a NdFe-steel Hybrid Wiggler For SSRL
Author(s): K. Glenn Tirsell; Thomas C. Brown; Paul J. Ebert; William C. Dickinson; Edward M. Lent; Egon Hoyer; Klaus Halbach; Steve Marks; David Plate; Derek Shuman
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Paper Abstract

A NdFe-steel hybrid configured permanent magnet wiggler is being developed for insertion in the SPEAR ring at the Stanford Synchrotron Radiation Laboratory, SSRL. Featuring 15 complete periods, a 12.9-cm magnetic period length, and a peak magnetic field range of 0.01-1.4 Tesla, the wiggler was designed to provide an intense radiation source for the National Laboratory/University of California participating research team (PRT) facility on Beam Line VIII-W. A new permanent magnet material, neodymium-iron (NdFe), is being used in the magnetic structure instead of rare-earth cobalt, REC, used previously in the 27-period wiggler now on Beam Line VI. NdFe advantages include a 16% higher coercive force (10.6-kOe vs. 9.0-kOe) and lower cost. The wiggler design features a thin walled, rigid vacuum chamber with pole pockets on opposing surfaces allowing a 2.1-cm minimum magnetic gap with a 1.8-cm beam vertical aperture. At 3 GeV the wiggler at peak field is expected to radiate approximately two kilowatts in a 5-mrad horizontal fan with a 7.8 keV critical energy. Calculations are in progress to model the wiggler radiation spatial and spectral radiation emission.

Paper Details

Date Published: 5 May 1986
PDF: 8 pages
Proc. SPIE 0582, Insertion Devices for Synchrotron Sources, (5 May 1986); doi: 10.1117/12.950928
Show Author Affiliations
K. Glenn Tirsell, Lawrence Livermore National Laboratory (United States)
Thomas C. Brown, Lawrence Livermore National Laboratory (United States)
Paul J. Ebert, Lawrence Livermore National Laboratory (United States)
William C. Dickinson, Lawrence Livermore National Laboratory (United States)
Edward M. Lent, Lawrence Livermore National Laboratory (United States)
Egon Hoyer, University Of California (United States)
Klaus Halbach, University Of California (United States)
Steve Marks, University Of California (United States)
David Plate, University Of California (United States)
Derek Shuman, University Of California (United States)

Published in SPIE Proceedings Vol. 0582:
Insertion Devices for Synchrotron Sources
Ingolf E. Lindau; Roman O. Tatchyn, Editor(s)

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