![]() |
| The GCPCC beamline utilizes radiation from the LSU/CAMD superconducting, energy-shifting wiggler. The critical wavelength for the wiggler is 1.18 Å (10.5 keV) when operated at 7 Tesla with a 1.5 GeV electron beam. The wiggler has five poles. The field of the central pole is 7 Tesla. The end-poles are normal conducting magnets. The field in these poles is less than 0.7 Tesla. The poles on either side of the central pole are superconducting due to their proximity to the central pole. The length of these poles was determined by the constraint that their field not exceed 1.55 Tesla. The magnitude of the flux produced by the superconducting side poles relative to the central pole is 16% at 7 KeV, 3 % at 12 Kev, and 0.6% at 17 KeV. If "echoes" present a problem at the lower photon energies, the field strengths of all poles can be scaled down. The unique design of the wiggler permits this mode of operation since the transverse position of the source point is independent of magnetic excitation. |