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Description
The high luminosity specifications for future linear colliders, such as the Compact Linear Collider (CLIC) require extremely small vertical beam emittance at the interaction point. This relies on minimizing the emittance growth in the collider sub-systems. One major source of emittance growth is the Main Linac, mainly caused by misaligned quadrupoles and accelerating structures. The current budget for the normalized emittance growth is 5 nm due to the static misalignments and another 5 nm due to the dynamic imperfections. The budget for the static imperfections is achieved through the use of beam-based alignment, such as one-to-one correction, dispersion-free steering, and the realignment of accelerating structures. This paper explores the use of additional emittance tuning bumps to further decrease the emittance growth, thereby increasing the luminosity.
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