Speaker
Description
Beam-Based Alignment studies are fundamental for ensuring accurate beam transport along the linac up to the plasma stage. Misalignments of quadrupoles and RF structures can induce trajectory distortions, leading to emittance dilution and enhanced susceptibility to wakefields. Proper modeling and correction of these misalignments are critical to preserving beam quality. In plasma acceleration, tolerance to transverse misalignment becomes even more stringent. Minimizing the relative centroid offset between the drive beam and the witness beam is essential to mitigate the onset of hose instability, which can degrade the uniformity of the wakefields and reduce the acceleration efficiency. BBA procedures considering correction techniques are required. DFS and WFS algorithms have been tested to minimize trajectory deviations and mitigate the impact of short-range wakefields, which represent one of the main limitations in high-gradient X-band linac. Dedicated RF-Track simulations are carried out to assess the performance of DFS and WFS in mitigating wakefield-induced orbit distortions and alignment-related errors. The numerical studies have been done under realistic misalignment scenarios.
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