Operational Experience of Cooling Water Systems for Accelerator Components at PLS

The PLS cooling water system has been utilized for absorbing thermal load generated by a multitude of electromagnetic rf power delivering networks at PLS. The low conductivity cooling water for heat removal from the accelerator components is deionised and filtered to more than 2 MΩ·cm of specific resistance. The operation temperature of dedicated components in the accelerator is sustained as tight as ±0.1°C to minimize the influence of temperature fluctuation on the beam energy and stability. Although the PLS cooling systems were initially installed with a high degree of flexibility to allow for the conditioned operations for high beam gain, the system improvements and repairs have been employed to enhance the operational performance and reliability, and to incorporate the newly developed operating interfaces such as EPICS accelerator control systems.