The Eddy-current-induced Head-tail Instability at the KEK-PS
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چکیده
The head-tail instability of the 12 GeV PS at KEK, has been confirmed by extensive experiments. It turns out that the eddy-current-induced sextupole fields in the rectangularshaped vacuum pipe in the main bending magnets played a crucial role in the head-tail instability during acceleration. The eddy current effect was verified by field measurement and chromaticity measurement in a way of different fieldrampings. The coupling impedances of the present injection kickers and new fast-extraction (FX) kickers, the dominant impedance sources, have been examined on the test bench. The growth rate is calculated.
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تاریخ انتشار 1999