Method and apparatus coordinating synchrotron acceleration periods with patient respiration periods

An apparatus configured to accelerate charged particles for treatment of a patient, comprising:

• a synchrotron, comprising:
• at least one bending magnet;
• a winding coil power supply configured to operate at a first power level;
• a first winding coil wrapped around said at least one bending magnet, said first winding coil configured to carry power from said winding coil power supply;
• a correction coil power supply configured to operate at less than ten percent of said first power level;
• and
• a correction coil wrapped around said at least one bending magnet, said correction coil configured to carry power from said correction coil power supply,
• wherein said correction coil, operating at less than ten percent of said first power level, allows rapid changes in energy levels of the charged particles;
• and
• a main controller configured to alter said energy levels for each pulse of said synchrotron through control of said correction coil power supply resulting in an altered magnetic field used in control of acceleration of the charged particles in said synchrotron.