[Mon-D2] Vacuum Science and Technology -- Large Vacuum Systems

[Mon-D2-4] SuperKEKB Vacuum System in These Six Years Operation

*Yusuke Suetsugu^1,2, Kyo Shibata^1,2, Takuya Ishibashi^1,2, Mitsuru Shirai¹, Shinji Terui¹, Ken-ichi Kanazawa¹, Hiromi Hisamatsu¹, Mu Lee Yao² (1. KEK (Japan), 2. SOKENDAI (Japan))

Keywords:Accelerator vacuum system, Electron/positron storage ring, Photon stimulated gas desorption, Electron cloud instability, Beam inpedance