Towards ATF3: Beam based alignment (DFS, WFS) corrections in the ATF LINAC and ATF2 beamline

The Accelerator Test Facility 2 (ATF2) serves as a critical platform for testing technologies and techniques aimed at advancing the next generation of linear colliders. The ATF2 is composed of a linear accelerator (LINAC), a damping ring, and an extraction line that includes a high-precision final focus system designed to achieve the small beam sizes necessary for future collider experiments. A key requirement for these systems is maintaining high beam stability to deliver the nominal beam parameters at the interaction point, where tight beam focusing and minimal emittance are crucial for optimal collision performance. Recent efforts have focused on developing and implementing advanced beam correction techniques to enhance stability and counteract disruptive effects such as unwanted beam dispersion and wakefields to prepare for the ATF3 upgrade. These correction strategies have been tested across the LINAC, damping ring, and extraction line, showing promising results in mitigating these adverse effects. In particular, these methods have demonstrated the ability to reduce transverse beam oscillations and preserve beam quality, thereby improving the precision of beam delivery.