Title :
Ramp tuning of the APS booster synchrotron magnet power supplies
Author :
Milton, S.V. ; Carwardine, J.A.
Author_Institution :
Adv. Photon Source, Argonne Nat. Lab., IL, USA
Abstract :
The acceleration cycle of the Advanced Photon Source (APS) booster synchrotron is completed within 250 ms and is repeated at 2 Hz. The currents in the quadrupole and sextupole magnets must track the dipole current to within tight tolerances if the beam is to remain stable during acceleration. In order to meet the performance specifications, a monitoring system, online with the main control system, is used to measure machine performance and adapt power supply reference waveforms from cycle to cycle. The system optimizes the tracking between the power supplies, thus minimizing transient effects and taking care of any slow drifts. Tuning algorithms are described and their performance evaluated. Practical considerations are also discussed
Keywords :
accelerator control systems; accelerator magnets; circuit tuning; computerised monitoring; electron accelerators; power supplies to apparatus; power system control; power system measurement; synchrotrons; 2 Hz; 250 ms; APS booster synchrotron; acceleration cycle; control system; dipole current; machine performance; magnet power supplies; monitoring system; performance specifications; power supply reference waveforms; quadrupole magnets; ramp tuning; sextupole magnets; transient effects; tuning algorithms; Acceleration; Condition monitoring; Control systems; Laboratories; Magnetic separation; Particle beams; Positrons; Power measurement; Power supplies; Synchrotrons;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505667
