The Improvement and Data Acquisition Systems on Electrical Systems and Grounding Networks in NSRRC

The purpose of this paper is to declare the improvement on electrical and grounding systems in NSRRC. In electrical power system, an Automated Voltage Regulator (AVR) was established to the quadrupole magnet system in 2004. The variation of voltage supply from Taiwan Power Company (TPC) is reduced from ±3% to ±0.15% through the AVR system. And a Supervisory Control and Data Acquisition (SCADA) system was also setup to monitor the electrical power conditions in each power station. After the high precision grounding systems were constructed in 2004, the stability of beam line was raised. For comprehending the grounding current and noise control, a grounding monitoring system with 16 channels was built in the storage ring. The grounding currents of 4 kickers, one septum and grounding bus are on-line monitored. Two Electromagnetic Field (EMF) apparatuses were also installed to collect electrical and magnetic fields in the R1 section. It was observed that the electromagnetic field was correlated to grounding currents in certain locations. Injection effects were clearly found in most monitored data. Expansion of the grounding monitoring system and the analytical software will be integrated in the next step.