Beam Switching and Beam Feedback Systems at KEKB Linac

Details Beam Switching and Beam Feedback Systems at KEKB Linac Beam Switching and Beam Feedback Systems at KEKB Linac

2000-08-18

arxiv.org/abs/physics/0008134v2

eConf C000821 (2000) TUE10

Physics

Accelerator Physics

3 pages, 3 figures, LaTeX, LINAC2000, TUE10, english correction

Scientific paper

The KEK 8-GeV electron / 3.5-GeV positron linac has been operated with very different beam specifications for downstream rings, KEKB, PF and PF-AR. For the reliable operation among these beam modes intelligent beam switching and beam feedback systems have been developed and used since its commissioning. A software panel is used to choose one of four beam modes and a switching sequence is executed in about two minutes. Most items in a sequence are simple operations followed by failure recoveries. The magnet standardization part consumes most of the time. The sequence can be re-arranged easily by accelerator operators. Linac beam modes are switched about fifty times a day using this software. In order to stabilize linac beam energy and orbits, as well as some accelerator equipment, about thirty software beam feedback loops have been installed. They have been utilized routinely in all beam modes, and have improved its beam quality. Since its software interfaces are standardized, it is easy to add new feedback loops simply defining monitors and actuators.

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