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Description
The storage ring of the Korea-4GSR (Korea 4th Generation Synchrotron Radiation) facility currently under construction consists of a total of 1184 magnets, of which 792 are large-capacity magnets requiring rated currents of 140A or 280A.
To drive these large-capacity magnets, magnet power supplies (MPSs) are required to support parallel operation in order to minimize the number of MPS types, thereby improving maintenance efficiency and reducing manufacturing costs. In addition, to ensure beam stability and low-emittance beam performance, current stability of less than 10 ppm and accuracy of less than 100 ppm under long-term operation are required during the prototype development.
This paper presents a storage ring modular magnet power supply (SR Modular MPS) rated at 140A, which is designed in a modular form with master–slave-based parallel operation capability, allowing the rated output current to be expanded up to 280A through two-unit parallel operation.
The proposed MPS can supply both 140A and 280A rated currents to large-capacity magnets using a single MPS type, and satisfies the MPS performance requirements over the entire operating range through a compensation method applied based on operating-condition-dependent characteristics.
Experimental results demonstrate that the developed SR Modular MPS achieves a stability of 2.28 ppm and an accuracy of 45.79 ppm in single-unit operation, and a stability of 5.1 ppm and an accuracy of 45.88 ppm in parallel operation.
| Paper status | Proceeding files received |
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