Development of a NdFe-steel Hybrid Wiggler For SSRL

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

doi:10.1117/12.950928

5 May 1986 Development of a NdFe-steel Hybrid Wiggler For SSRL

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

Author Affiliations +

Proceedings Volume 0582, Insertion Devices for Synchrotron Sources; (1986) https://doi.org/10.1117/12.950928
Event: International Conference on Insertion Devices for Synchrotron Sources, 1985, Stanford, United States

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.

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K. Glenn Tirsell, Thomas C. Brown, Paul J. Ebert, William C. Dickinson, Edward M. Lent, Egon Hoyer, Klaus Halbach, Steve Marks, David Plate, and Derek Shuman "Development of a NdFe-steel Hybrid Wiggler For SSRL", Proc. SPIE 0582, Insertion Devices for Synchrotron Sources, (5 May 1986); https://doi.org/10.1117/12.950928

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