SRF2025 - 22nd International Conference on RF Superconductivity

Experimental investigation of plasma processing for PIP-II SSR2 cavities

MOP42

22 Sept 2025, 14:30

3h

Ito International Research Center

Board: MOP42

Poster Presentation MC3: Cavities Monday Poster Session

Speaker

Bianca Giaccone (Fermi National Accelerator Laboratory)

Description

Field emission and multipacting are critical factors that limit the achievable operational gradient of superconducting radio frequency (SRF) cavities. Plasma processing has been demonstrated as an effective in-situ technique for mitigating hydrocarbon-induced field emission and multipacting across a range of cavity geometries. In this work, we present the initial development and subsequent application of plasma processing for PIP-II type II spoke resonators (SSR2). The process was carried out at room temperature on an SSR2 cavity equipped with the CM-style high-power coupler and installed in the cryostat. Cavity performance was evaluated through comparative cold tests conducted before and after plasma processing.

Funding Agency

This manuscript has been authored by FermiForward Discovery Group, LLC under Contract No. 89243024CSC000002 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics.