CONSTRUCTION OF THE SECOND 500 KV PHOTOCATHODE DC-GUN AT KEK

A 500 kV photocathode DC-gun has been developed at KEK since 2009. The gun was almost completed and high voltage conditioning has been carried out up to 500 kV. In addition, we have designed a new quick cathode preparation system for a practical operation of the DCgun without long interruption. The detail result and status are presented in this paper.