KEKB
An Asymmetric Electron-Positron Collider for B Physics
Operation of KEKB was started at Dec., 1998 and turned off at Jun.30, 2010.Many challenges and efforts were performed in order to increase luminosity.
Total integrated luminosity of 1052 /fb. was accumulated by Belle detector.
KEKB will be upgrade to SuperKEKB which have 40 times higher performace.
The construction is now on-working.
