Compensation of the Crossing Angle with Crab Cavities at KEKB

T. Abe , K. Akai , M. Akemoto , A. Akiyama , M. Arinaga , K. Ebihara , K. Egawa , A. Enomoto

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J. Flanagan S. Fukuda H. Fukuma Y. Funakoshi K. Furukawa T. Furuya K. Hara T. Higo S. Hiramatsu H. Hisamatsu H. Honma T. Honma K. Hosoyama T. Ieiri N. Iida H. Ikeda M. Ikeda S. Inagaki S. Isagawa H. Ishii A. Kabe E. Kadokura T. Kageyama K. Kakihara E. Kako S. Kamada T. Kamitani K. Kanazawa H. Katagiri S. Kato T. Kawamoto S. Kazakov M. Kikuchi E. Kikutani K. Kitagawa H. Koiso Y. Kojima I. Komada T. Kubo K. Kudo N. Kudo K. Marutsuka M. Masuzawa S. Matsumoto T. Matsumoto S. Michizono K. Mikawa T. Mimashi S. Mitsunobu K. Mori A. Morita Y. Morita H. Nakai H. Nakajima T. T. Nakamura H. Nakanishi K. Nakanishi K. Nakao S. Ninomiya Y. Ogawa K. Ohmi S. Ohsawa Y. Ohsawa Y. Ohnishi N. Ohuchi K. Oide M. Ono T. Ozaki K. Saito H. Sakai Y. Sakamoto M. Sato M. Satoh K. Shibata T. Shidara M. Shirai A. Shirakawa T. Sueno M. Suetake Y. Suetsugu R. Sugahara T. Sugimura T. Suwada O. Tajima S. Takano S. Takasaki T. Takenaka Y. Takeuchi M. Tawada M. Tejima M. Tobiyama N. Tokuda S. Uehara S. Uno Y. Yamamoto Y. Yano K. Yokoyama Ma. Yoshida Mi. Yoshida S. Yoshimoto K. Yoshino KEK Oho Tsukuba (Ibaraki Japan) E. Perevedentsev D. N. Shatilov BINP (Novosibirsk Russia)

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classification ⚛️ physics.ins-det

keywords beencavitiescrabcrossinganglekekbluminosityrings

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Crab cavities have been installed in the KEKB B--Factory rings to compensate the crossing angle at the collision point and thus increase luminosity. The beam operation with crab crossing has been done since February 2007. This is the first experience with such cavities in colliders or storage rings. The crab cavities have been working without serious issues. While higher specific luminosity than the geometrical gain has been achieved, further study is necessary and under way to reach the prediction of simulation.

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Compensation of the Crossing Angle with Crab Cavities at KEKB

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