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Birch, S. L.

Paper Title Page
TUPAN004 Slow Kicker Magnet System with Energy Recover Pulse Power Supply with Extended Flat Top 1395
  • P. A. Elkiaer, C. E. Hansen, N. Hauge, C. Nielsen, E. Steinmann
    Danfysik A/S, Jyllinge
  • S. L. Birch, E. P. Quinn, S. P. Stoneham
    STFC/RAL/ISIS, Chilton, Didcot, Oxon
  • A. Morris
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon
  Danfysik has developed a novel Slow Kicker Magnet Power Supply ERMPPS with associated magnet achieving high stability, long flatness top and low energy consumption. Two Slow Kicker Magnet Systems has been built to RAL, one low and one high energy supply. The magnets are laminated window frame type. The RAL synchrotron produces high energy protons at 50 Hz rate. The Slow Kickers operate at 10 Hz, directing a portion of the extracted protons to a second beam line. The flat top width is 600 μs with a flat top and peak-peak stability better than 100 ppm. The rise and fall time is 12 msec. The power supply has been developed with following highlights: High accuracy with adjustable output current, wide range micro-step set able flattop and rise time width, energy recovery, digital flattop and rise time regulation loop in FPGA and variable repetition frequency down to one shoot operation. The flat top- and rise time width settings are bounded by the actual load and internal component values. The paper describes power supply topology, the digital regulation principia and the magnet construction. Performance measurements electrical as well as magnetic measurements are presented.