Abstract
Collective effects in the NICA collider are considered taking into account the results of calculations of induced electromagnetic fields (wakes) and coupling impedances of vacuum-chamber elements [1]. Coulomb shifts of longitudinal and transverse oscillations are considered and the stability of coherent oscillations in the presence of these shifts is analyzed; their influence is significant, since it can lead to the Loss of Landau Damping (LLD). Special attention is given to transverse head–tail instabilities and longitudinal instabilities caused by High-Order Modes (HOM) of the cavities. Recommendations on the suppression of instabilities are formulated.
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