Alarm and Interlock System in Cryogenic System of EAST

EAST (Experimental Advanced Superconducting Tokamak) has been carried out fourteen campaigns since its implementation at the end of 2005. The cryogenic system is one important subsystem which is to cool down the superconducting magnets and relating components. Alarm and interlock system ensures the reliability and safety of the cryogenic system. This paper presents the overview of the alarm and interlock system, especially the quench protection in the cryogenic system of EAST. At the same time, the operational performance has been analyzed for further improvement of the cryogenic system reliability so as to guarantee the success of high performance plasma experiments in the future.