Resistive-wall Coupled-bunch Instability Driven by In- Vacuum Insertion Devices in the Spring-8 Storage Ring
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چکیده
More than ten of in-vacuum type insertion devices are installed in the SPring-8 storage ring. When their gap was closed, we observed the low frequency vertical coupled bunch instability. We consider that this instability is driven by resistive-wall impedance caused by the magnet blocks made of NdFeB, of which conductivity is two order lower than Aluminum. We calculated the resistivewall impedance and measured its characteristics.
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تاریخ انتشار 2001