Speaker
Description
For next generation particle collider designs, such as the Cool Copper Collider, small beam sizes, short bunch spacing, and beam stability are required to reach the luminosities desired to search for new physics. One challenge to overcome is damping the excitation of higher order modes in accelerating cavities. These modes are excited by wakefields induced by the beam, and must be removed before they are seen by the following bunch to prevent deflecting kicks that will spoil beam stability. The solution is the addition of damping slots on the accelerator cavities that can couple to these higher order modes and remove them from the central part of the cavity that the beam passes through, to reduce the kick factor of the mode. Additionally, these damping slots can lower the Q value for these modes, causing the excitation to die out between bunches because the mode cannot resonate in the cavity for as long. In this study, we optimize the damping slot geometry to remove higher order modes from the accelerating cavity while preserving the fundamental accelerating mode.
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