Digital DC power supply for light accelerator
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초록
There are 70 vertical and 70 horizontal correctors for Pohang Light Source. Until mid of 2000, power supplies forthese correctors were based on 1990’s technology, so the global orbit feedback system was not possible with poor 12 bitresolution. A new task force team was assembled to develop new power supplies with BESSY type DAC cards. After the project,two vertical correctors in each lattice were connected with new power supplies, and the global orbit feedback was availablewithin the accuracy of 5 microns. However, this replacement was not enough to satisfy the beam stability requirement of2 microns for PLS. We have launched another power supply design based on all digital technology. This attempt was completedwithin a year, and 80 units were assembled in house. Currently, the global orbit feedback system is running successfullywith new digital power supplies and the compensation of chamber motion due to the thermal load by using digital displacementtransducers attached on each BPMs.
Abstract
There are 70 vertical and 70 horizontal correctors for Pohang Light Source. Until mid of 2000, power supplies forthese correctors were based on 1990’s technology, so the global orbit feedback system was not possible with poor 12 bitresolution. A new task force team was assembled to develop new power supplies with BESSY type DAC cards. After the project,two vertical correctors in each lattice were connected with new power supplies, and the global orbit feedback was availablewithin the accuracy of 5 microns. However, this replacement was not enough to satisfy the beam stability requirement of2 microns for PLS. We have launched another power supply design based on all digital technology. This attempt was completedwithin a year, and 80 units were assembled in house. Currently, the global orbit feedback system is running successfullywith new digital power supplies and the compensation of chamber motion due to the thermal load by using digital displacementtransducers attached on each BPMs.
참고문헌 (8)
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- K. M. Ha, "PLS fully digital controlled corrector power supplies", Proceedings of International Conference on Accelerator and Large Experimental Physics Contrl System (2005)
- Y, F Liu, "Digital control power con-verters", Proceedings of the IEEE Conference on Control Applications, pp.635~640 (2005)
- Next Generation Peripheral Controllers, "Modules on TMS320F280x Digital Signal Controllers", Proceedings of TI Developer Conference, pp.18~25 (2005)
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