Upgrade of the NSRRC Booster Power Supply

Abstract For the 1.5GeV energy injector upgrade project for the NSRRC synchrotron light source, new ramping power supplies were implemented in the “White circuit” booster synchrotron ring. IGBT semiconductors operating at a higher frequency was employed to replace the older GTO-based system. The new system enabled reduction of the current waveform harmonic distortions and thus improving the injection and extraction efficiency. The increased reliability increased blind power from circuit mistuning also ensures higher system uptimes. The measured dynamic range of the 10 Hz sine wave current output of the new ramping power supply is shown to be better than 75 dB with a total harmonic distortion (THD) less than 0.015 %. From the monitored beam current, the low THD dipole magnets current can greatly improve the stability of the booster beam current.

[1]  Ki-Hyeon Park,et al.  High-resolution voltage reference for magnet power supply , 2009 .

[2]  George C. Chryssis.  High-frequency switching power supplies: Theory and design , 1984 .

[3]  K. Perez.  Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2014 .

[4]  Bao-sheng Wang,et al.  DEVELOPMENT OF A DSP-BASED DIGITAL CONTROL THREE PHASE SHUNT ACTIVE POWER FILTER FOR MAGNET POWER SUPPLY SYSTEM* , 2011 .

[5]  K. T. Hsu,et al.  Study of the White circuit tracking performance in the booster synchrotron of SRRC , 2001, PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268).

[6]  J.C.Huang,et al.  USING A HIGH PRECISION PROGRAMMABLE DC POWER SUPPLY OF TPS MAGNET , 2011 .

[7]  C. J. Wang,et al.  OPERATION PERFORMANCE OF THE WHITE CIRCUIT FOR THE BOOSTER SYNCHROTRON IN NSRRC , 2004 .

[8]  K. T. Hsu,et al.  CONTROL INTERFACE OF NEW WHITE CIRCUIT FOR SRRC 1.5GeV BOOSTOR SYNCHROTRON , 2000 .

[9]  S. Matsuyama,et al.  Development of an adjustable beam flattening system for modification of passive beam delivery technique in proton therapy , 2010 .

[10]  Felix Jenni,et al.  Fast Magnet Power Supplies for Dynamic Proton Beam Control for Tumor Treatment , 2006, 2006 12th International Power Electronics and Motion Control Conference.

[11]  F. Jenni,et al.  Five years of operational experience with digitally controlled power supplies for beam control at the Paul Scherrer Institut (PSI) , 2005, 2005 European Conference on Power Electronics and Applications.

[12]  T. Shirai,et al.  Making beam spill less sensitive to power supply ripple in resonant slow extraction , 2011 .

[13]  K.-B. Liu,et al.  Analysis and Compensator Design of Magnet Correction Power Supply , 2011 .

[14]  Chin-Sien Moo,et al.  Ramping particle current power supply , 2010, TENCON 2010 - 2010 IEEE Region 10 Conference.

[15]  F. Voelker,et al.  A novel four-quadrant power supply for low-energy correction magnets , 2003 .