NSRRC Activity Report 2023

094 NSRRC ACTIVITY REPORT 2023 Introduction T he primary goal of AC magnet power supply for the TPS Booster Ring is to increase the output electron beam energy from the linear accelerator from 150 MeV to 3 GeV and inject it into the storage ring. This energy increase is achieved through operating the booster ring AC magnet power supply (BACMPS) with a synchronized 3 Hz current ramping. This report provides an overview of the installation of the BACMPS system, the challenges encountered during commissioning, proposed improvements, and the development of an energy-saving mode. BACMPS The BACMPS system consists of a single bending magnet power supply (BMPS) and four quadrupole magnet power supply (QMPS) units to form the energy ramping structure Improved the TPS Booster AC Magnet Power Supply Performance Fig. 1 : System function diagram of the TPS BR BMPS. for the booster ring. The bending magnets in the booster ring consist of 60 units of two different magnetic field lengths: 1.6 m (BR-BD) and 0.8 m (BR-BH). They are connected in series and powered by a single BMPS unit. The BMPS has the capacity to deliver currents as high as 1200 A within a voltage range of ± 1600 V. The internal topology of the BMPS, as shown in Fig. 1 , includes an EMI filter, soft-start circuitry to mitigate input electromagnetic interference, components for DC-DC conversion, a dual full-bridge circuit, output filters, and control cabinet assemblies. Current feedback signals are provided by a direct current transformer (DCCT), and these signals are used with field programmable gate array (FPGA)-based proportional–integral (PI) compensation calculations and a 1 kHz PWM modulation signal to drive four intelligent SkiiP IGBT modules. Ethernet communication is used for AC and DC mode control, enabling adjustable 3 Hz sinusoidal current waveforms with a peak output current ranging from 0 to 1200 A.