A 50 Hz dipole magnet for the TRIUMF KAON factory booster ring

The 3-GeV booster synchrotron for TRIUMF´s KAON Factory will need 24 dipole magnets each 3.0-m long operating with a resonant power system designed to give a 50-Hz AC field superimposed onto a DC field. The maximum and minimum field levels are 1.118 and 0.295 T, respectively. The magnet design is presented and compared with measured results from a prototype which was constructed to evaluate fabrication procedures and to verify the AC loss calculations. The experiences gained from this fabrication are described. The prototype magnet measured parameters were very close to the design values, giving confidence in the methods of calculation and fabrication techniques. The prototype also served as a test of the power supply and its components and highlighted some of the control aspects that must be incorporated for a working synchrotron ring