Design and Performance of Power Supplies for Superconductor Insertion Devices at TLS 1.5-GeV Ring

A sophisticated Power Supply system was developed, installed and successfully put into operation for the Superconducting Insertion Devices at the 1.5GeV Taiwan Light Source (TLS). These magnets includes Superconducting Wave Length Shifter (SWLS), Superconducting Multipole Wiggler (SMPW) and three In-Archromate Superconducting Wigglers (IASWs). The power supply, with ±350A/±15V output power, is a four-quadrant bipolar switching step-down converter. The power supply, employing multiple regulation loops, slew rate control and ultra-high precision current transducer for feedback loop, is capable of delivering highly stable and reliable current to the superconducting loads. The topology, control scheme and its performance are described in this paper. The power supply system’s performance and reliability will be further improved and adopted to power low-temperature superconducting devices at NSRRC in the future. Superconducting Magnets Main Power Supply Architecture For increasing the beam intensity in the hard x-ray spectral range at the 1.5GeV TLS ring, superconducting magnet insertion devices are installed and all these devices function very effective to boost up the proton beam energy as desired. These superconducting magnet insertion devices require high precision bipolar power supplies to maintain excellent beam output stability. The main power supply, with a dedicated four-loop control scheme, performs like a class AB current amplifier to provide precise current output with ultra-low ±1ppm long term and ±30ppm short term output stability. And these power supplies have been proven to be successful and reliable in delivering the expected beam quality at TLS ring. The developed power supplies has been successfully employed to charge the other superconducting magnets and could be further modified and upgraded to power other superconducting insertion devices in the future for other applications demanding high beam brilliance. Conclusion Multi-Loops Control Scheme of The Main Power Supply Supply Electrical Properties of TLS Superconducting Insertion Devices 3PoBJ_02