Accession Number : ADP005093

Title :   Development of a NdFe-Steel Hybrid Wiggler for SSRL (Stanford Synchrotron Radiation Laboratory),

Corporate Author : LAWRENCE LIVERMORE NATIONAL LAB CA

Personal Author(s) : Tirsell,K. G. ; Brown,Thomas C. ; Ebert,Paul J. ; Dickinson,William C. ; Lent,Edward M.

Report Date : OCT 1985

Pagination or Media Count : 8

Abstract : A NdFe-steel hybrid configured permanent magnet wiggler is being developed for insertion in the SPEAR ring. 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 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.

Descriptors :   *PARTICLE ACCELERATOR COMPONENTS, *PERMANENT MAGNETS, NEODYMIUM ALLOYS, IRON ALLOYS, STEEL, COSTS, STABILITY, BEAM STEERING, ELECTRON BEAMS

Distribution Statement : APPROVED FOR PUBLIC RELEASE