Speaker
Description
Transverse electric (TE) cavities with tailored multipole content offer new options for beam manipulation and beam-quality control. We present a field-based procedure to synthesise hybrid TE-mode cavities by superposing cylindrical standing-wave solutions and deforming a Fourier-parameterised boundary until the perfect-electric-conductor (PEC) condition is satisfied. The optimisation is performed with sequential quadratic programming on a dimensionless basis, and the resulting surfaces are scaled to physical dimensions and checked in CST eigenmode simulations. Two hybrid examples are obtained and analysed that form closed, reasonable geometries without any unwanted higher order modes,as well as the initial balance between constituent modes largely preserved. The method provides a practical route to designing TE multipole cavities for future applications such as emittance corrections.
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