Mode-zero Robinson instability in the presence of passive superconducting harmonic cavities
A higher harmonic cavity (HHC) is popularly employed in synchrotron light storage rings Dishwasher Nozzle Seal to enhance the machine performance, which requires its fundamental mode resonant frequency to be tuned above the radio-frequency harmonic.However, this detuning is likely to cause Robinson instability.In this paper, we focus on a mode-zero