International Workshop on Future Linear Colliders 2026

Performance of 2-Step Baked Niobium Cavities for the ITN Cryomodule

Not scheduled

20m

KEK

Oral presentation (onsite) High Gradient RF Techniques High Gradient RF Techniques

Speaker

Eric Viklund (KEK)

Description

To support the ILC Technology Network(ITN) Cryomodule project at KEK, we have constructed and assembled six single cell cavities and one 9-cell cavity for vertical testing (VT). A series of surface treatment were applied to the cavities using the proposed recipe for the construction of the International Linear Collider (ILC). This recipe consists of four steps: bulk electropolishing (EP), annealing, cold EP, and finally two step baking. Using this recipe, we can consistently exceed the ILC specifications. We analyze the performance and characteristics of these cavities using Q vs E and temperature mapping measurements. We also analyze the effect of cold EP and HPR on the maximum quench field and quality factor of the cavities.