POWER CONVERTERS OF THE MAIN DIPOLE AND QUADRUPOLE MAGNET STRINGS OF THE ANTIPROTON DECELERATOR AT CERN

The two main power converters for the dipoles (D) and quadrupoles (Q) are presented as part of the complex power converter system of the Antiproton Decelerator. The operational requirements and the performance speci-fications for deceleration from 3.5 to 0.1 GeV/c are dis-cussed. The layout and design of the power part, con-sisting of a 12-pulse thyristor rectifier and a switch-mode parallel active filter (AF), and of the precision regulation are described. The alternatives for integrating the AF into the current and voltage regulation loops are outlined. Problems encountered and results of tests are reported.