Implementation of Water Cooling System Control of 6-MeV Linear Accelerator for Fruit Sterilization

In-house 6-MeV Linear Accelerator (linac) for fruit Sterilization Laboratory in Synchrotron Light Research Institute, Thailand which is operated to control an electron beam energy and used for the generation of X-ray radiation. The experiments required an important component, such as linac tube, Electron gun, Microwave source and One of the components affect to Quality, Stability and Reliability of the linac operation that is Water Cooling System (WCS) Control. There is used to minimize heat dissipation on the linac tube. It is specification of operation within 40°C. Though the designing linac structure was operated which the parameters at 90 Hz repetition rate frequency and 5 µs pulse width beam. Fluctuation of the beam energy suggested that stability of the WCS was insufficient to X-ray intensity of fruit sterilization application. The improvement of WCS was reduced high temperatures on the linac surface and also adjusted fine control parameters with PID controller algorithm of water temperature was suppressed to within 40±0.1°C. As a result of the improvement the X-Ray intensity was effective for stabilization of fruit Sterilization application.