Construction and testing of superferric dipoles for the A1900 Fragment Separator

The A1900 Fragment Separator contains four superconducting dipoles. The dipoles produce a field of 2 T at an operating current of 185 A. The changes in effective length have been measured and compared with calculations that predict a longer field boundary than observed. The magnets ran to full field without training. Edge angles were measured and found to be small. All magnets have been installed in the beam line and retested. First beam through the Separator is expected by the end of 2000.