Speaker
Description
A joint LASA–Fermilab activity is in progress to study the impact of key surface processing steps on the performance of LB650 superconducting cavities in view of future series production. Among the several cavity preparation steps, electropolishing (EP) and mid-temperature heat treatment are considered the most critical and require specific optimization for the LB650 geometry. Single-cell and 5-cell cavities are used as test prototypes to investigate the effects of EP and mid-temperature bake at 350 °C. Vertical RF tests are performed at Fermilab after EP and after the mid-T bake under identical conditions. The ongoing program aims to provide insight into the evolution of Q₀ and accelerating gradient along the processing sequence. Preliminary observations and results are here presented.
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