Speaker
Description
In this work, we introduce a refined bead-pull measurement technique for the precise characterization of radiofrequency (RF) fields in accelerator cavities. Central motivation arises from the unavoidable manufacturing imperfections in real-world devices, which cause deviations from simulated field maps and thus necessitate direct, high-fidelity measurement. To address this, we propose the use of conducting and/or dielectric ellipsoids in place of traditional spherical beads. This approach leverages the rotational degrees of freedom of the anisotropic bead to enable the extraction of both the magnitude and direction of the electromagnetic field at a given point. Consequently, this method allows for the reconstruction of the complete vector field profile not only along the cavity's axis of symmetry but throughout the volume traversed by the beam, providing critical data for accurate beam-dynamics simulations and optimization.
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