Vacuum Operation Of First Divertor Campaign On East

Experimental Advanced Superconducting Tokamak is the first whole superconducting tokamak with divertor configuration commissioned in the world. Vacuum system is one of the most important sub-systems of EAST device. Wall conditioning also plays a very important role for the plasma operation. Because Ion Cyclotron Resonance Frequency discharge cleaning could be carried out with a high toroidal magnetic field, it is used often for wall conditioning, especially for boronization, which was done successfully on EAST. This paper describes the vacuum operation of this new device. The first part describes the vacuum system, consisting of pumping, fuelling and wall conditioning related sub-systems. Then the operation of the vacuum system is introduced including leak detecting, pumping, boronization, etc. At last, the plan for the coming campaign is discussed.