This paper describes an experimental study of the enlargement of the vertical beam size observed in single beam operation at the KEKB LER.
The design of the synchronization system of the KEKB accelerator is described. The synchronization system is classified into 1)fast timing and 2)software timing. The fast timing signals including rf frequency will be distributed by a optical transfer system with a phase stabilized optical fiber. The performance has been evaluated. A scheme of… (More)
A bucket selector system has been developed for the KEK-B collider. Three VME computers for actual bucket-selecting, bunch-current reading and operator interface are working. The system provides a tool for generating the desired filling patterns in the rings.
Estimating the electrical and mechanical parameters involved in three-phase induction motors is frequently employed to avoid measuring every variable in the process. Among mechanical parameters, speed is an important variable: it is involved in control, diagnosis, condition monitoring, and can be measured or estimated by sensorless methods. These… (More)
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… (More)