STATUS OF KEKB AND UPGRADE PLAN TO SUPERKEKB

T Agoh,K Akai,M Akemoto,A Akiyama,M Arinaga,Ken Ebihara,Katsuya Egawa,Atsushi Enomoto,J W Flanagan,Shiro Fukuda,H Fukuma,Y Funakoshi,Kikuo Furukawa,Toshio Furuya,J Haba, K Hara,Toshiyasu Higo,Shigenori Hiramatsu,H Hisamatsu, Hiroshi Honma,Tetsuo Honma,T Ieiri,N Iida,H Ikeda,M Ikeda, S Inagaki,Shigeru Isagawa,Hitoshi Ishii,A Kabe,E Kadokura, Tadashi Kageyama,K Kakihara,E Kako,Susumu Kamada,T Kamitani,Kenichi Kanazawa,Hideki Katagiri, Susumu Kato, T Kawamoto,S Kazakov,Makoto Kikuchi,E Kikutani,H Koiso,Yuko Kojima,Itsuo Komada,Takeshi Kubo,Kazuko Kudo,Naomi Kudo,K Marutsuka,M Masuzawa,S Matsumoto,Tomohiro Matsumoto,S Michizono,K Mikawa,T Mimashi,S Mitsunobu,Kenjiro Mori,Akinori Morita, Yoshio Morita,Hiromi Nakai,Hideki Nakajima,T Nakamura,Hiroyuki Nakanishi,Koji Nakanishi,Kazuwa Nakao,Hitomi Nakayama,Satoshi Ninomiya,Yuji Ogawa,Kazuhito Ohmi,Satoshi Ohsawa,Yukio Ohsawa,Yoshitaka Ohnishi,Norihito Ohuchi,Katsunobu Oide,M Ono,Toshiyuki Ozaki,Kieko Saito,Hiroaki Sakai,Yoshihiro Sakamoto,Mitsumoto Sato,Munetake Satoh,K Shibata,Tetsuo Shidara,Mitsuru Shirai,A Shirakawa,T Sueno,M Suetake,Y Suetsugu,R Sugahara,Takashi Sugimura,Tsuyoshi Suwada,Shigetsugu Takano,Satoshi Takasaki,Toru Takenaka,Y Takeuchi,Masaki Tawada,M Tejima,Makoto Tobiyama,Nobuko Tokuda,S Uehara,S Uno,Noboru Yamamoto, Yoshiaki Yamamoto, Yuzo Yano, Keiko Yokoyama, S Yoshimoto

msra（2007）

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摘要

KEKB is an electron-positron two-ring collider for the leading B meson factory. It consists of an 8 GeV electron ring (HER) and a 3.5 GeV positron ring (LER) and their injector linac. It has been operated since December 1998, and has recently marked the peak luminosity of 17.12 /nb/s. This peak luminosity is obtained under the crab- ready beam optics having the robust operating condition by some efforts to solve the optics problems. We are aiming more luminosity improvement after the crab cavity installation. Further the major upgrade plan for SuperKEKB is expected to achieve 400 /nb/s keeping the baseline of the original proposal. This paper describes the recent status of KEKB and upgrade plans for SuperKEKB.

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