Design, Manufacturing, Assembly, and Lessons Learned of the Pre-production 325 MHz Couplers for the PIP-II Project at Fermilab

TL;DR

This paper details the design, manufacturing, assembly, and lessons learned from developing 325 MHz high-power couplers for Fermilab's PIP-II project, highlighting improvements and practical insights.

Contribution

It presents the design process, manufacturing, and assembly of high-power couplers, including lessons learned, for the PIP-II project at Fermilab.

Findings

Design optimizations from previous couplers implemented.

Lessons learned during manufacturing and assembly documented.

Successful integration into the cryomodule demonstrated.

Abstract

Five 325 MHz high-power couplers will be integrated into the pre-production Single Spoke Resonator Type-II (ppSSR2) cryomodule for the PIP-II project at Fermilab. Couplers were procured by both Fermilab and IJCLAB for this effort. The design of the coupler is described, including design optimizations from the previous generation. This paper then describes the coupler life cycle, including design, manufacturing, and assembly, along with the lessons learned at each stage.