Author/Authors :
Akai، نويسنده , , K and Akasaka، نويسنده , , N and Ebihara، نويسنده , , K and Ezura، نويسنده , , E and Furuya، نويسنده , , T and Hara، نويسنده , , K and Hosoyama، نويسنده , , K and Isagawa، نويسنده , , S and Kabe، نويسنده , , A and Kageyama، نويسنده , , T and Kojima، نويسنده , , Y and Mitsunobu، نويسنده , , S and Mizuno، نويسنده , , H and Morita، نويسنده , , Y and Nakai، نويسنده , , H and Nakanishi، نويسنده , , H and Ono، نويسنده , , M and Sakai، نويسنده , , H and Suetake، نويسنده , , M and Tajima، نويسنده , , T and Takeuchi، نويسنده , , Y and Yamazaki، نويسنده , , Y and Yoshimoto، نويسنده , , S، نويسنده ,
Abstract :
This paper describes the design features and operational status of the RF systems for the KEK B-Factory (KEKB). Two types of new RF cavities have been developed to store very high-intensity beams with many short bunches. The design and performance of the cavities and other critical components, such as the input couplers and HOM dampers, are reported. The configuration of the RF systems is given and descriptions of various control loops are made, including a direct RF feedback loop and a 0-mode damping loop. The effects of transient beam loading due to a bunch gap on bunch phase modulations were simulated and measured. The development of a superconducting crab cavity, which is a component of luminosity upgrade strategy, is also presented.
Keywords :
Accelerator , RF system , RF control , Accelerating cavity , Crab cavity , B-factory
