Instability Investigation for Storage Mode. Microwave Instability (Single-Bunch Instability)

摘要

The Amsterdam Pulse Stretcher (AmPS) will be used in storage mode for internal target (IT) physics. It demands the beam lifetime at least at the order of half an hour and the stored beam current of 200 mA. Bunched beam instabilities have been observed in many storage rings. The low-Q broadband impedance drives the single-bunch instability. The single bunch threshold and the equilibrium bunch length as the function of energies, RF voltages, and RF frequencies are investigated. The code ZAP has been used for investigating the stability thresholds for AmPS in storage mode. The note presents the simulation results. They gave useful information for choosing the RF parameters of AmPS.