http://www.surfacetreatments.it/thinfilms Status of KEKB Electropolishing system (Shinji Mitsunobu - 15') Speaker: Shinji Mitsunobu - KEK Tsukuba-Shi Ibaraki-Ken Japan | Duration: 15 min. Abstract Long time KEK superconducting cavities were treated by electro polish at Nomura plating Co.. For developing more reliable EP for ILC SC cavity,KEK decided to construct in-house new EP system. One L-band system and one universal system for 500 MHz and L-band system are gathered in one place. L-band system have been used routinely ILC cavities EP successfully. Anther new EP system for 500 MHz KEKB SC cavity have been constructed. KEKB test cavity was successfully processed.

1. Status of KEKB EP System S.Mitsunobu,Y.Funahashi,T.Furuya,A. Kabe,Y. Morita,M. Nishiwaki, M. Sawabe,S. Takano and K.Ueno KEK

3. Conceptual drawing of EP (Proff.Kojima’s car battery) Teflon

4. Vertical EP Furuya et al

5. Saito et al

7. KEKB Superconducting Cavity

8. Nb Cavity

9. Rotating Equipment for EP at Nomura Plating Co. 超伝導空洞の電解研磨

10. New EP bed at KEK

11. First test using TRISTAN Single Cell (TM110 mode test)

12. Ultrasonic tank and shower tank

13. New acid tank (500 L)

14. New EP area

15. Acid gas cleaning system

20. 4 bar shower rinsing O 3 rinsing Hotwater and U sonic rinsing