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Description
To meet the stringent requirements of high-current energy recovery linacs (ERLs), a 1.3 GHz 7-cell superconducting cavity was designed and optimized. The RF design employed multi-objective optimization to balance accelerating mode performance with higher-order mode (HOM) damping, achieving effective HOM suppression without compromising the fundamental mode performance. Key RF components, including the fundamental power coupler antenna and HOM absorbers, were optimized. Based on the optimized geometry, mechanical analysis was conducted to evaluate structural strength, pressure and tuning sensitivities, and modal behavior. Optimization of the stiffening ring radius further enhanced mechanical stability and reduced frequency variation. The integrated RF and mechanical studies demonstrate that the proposed cavity fulfills the performance and reliability demands of high-current ERL applications.
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