| Paper | Title | Page |
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MOCYA02 |
Self-consistent Simulation of Beam-Beam Interaction and Transverse Impedance in EicC | |
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| Recently, the interplay between beam-beam interaction and impedance has gradually come to the forefront as an essential factor that may limit collider performance. Self-consistent studies have shown that the combined effects could excite new coherent instabilities below the respective instability thresholds. In symmetric machines, such instability is triggered by the mode coupling between the beam-beam modes and the longitudinal sidebands. For electron-ion colliders, i.e., the EicC project, both the beam and machine parameters are remarkably asymmetric. Preliminary studies have shown that in EicC, the coupling between the beam-beam interaction and the impedance could also give rise to instabilities. The simulation results correlate this instability to the hourglass effect, but related studies are still in progress. In addition, how to overcome the strong hourglass effect is a key accelerator physics problem to boost the luminosity of mid-energy colliders, as well as a potential approach that can suppress the above instability. So far, this is an open subject, and relevant studies are still blank. This report will give some preliminary results for the above two questions. | ||
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