Standardization of the PIP-II Cavity String Assembly Procedure and Quality Assurance
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Parise, Mattia [Fermilab] (ORCID:0009000643869664)↗
Engineering topics
Wu, Genfa [Fermilab]
Publications and source records attributed to Wu, Genfa [Fermilab].
Cavity Preparation and Assembly: Challenges and Future R&D Directions
This presentation described the state of the art in cavity string assembly for the LCLS-II, HE, and PIP-II projects, as well as cavity performance statistics. The presentation also described the knowledge gap, opportunities for improvement, and future R&D recommendations.
Wu, Genfa [Fermilab]↗
Cavity Preparation and Assembly: Challenges and Future R&D Directions
This presentation described the state of the art in cavity string assembly for the LCLS-II, HE, and PIP-II projects, as well as cavity performance statistics. The presentation also described the knowledge gap, opportunities for improvement, and future R&D recommendations.
Wu, Genfa [Fermilab]↗
Cleanroom Assembly and Cavity Testing
A tutorial about the cleanroom assembly and cavity testing. The presentation discusses how-tos, best practices, and lessons learned.
Wu, Genfa [Fermilab]↗
Improving the Performance of Mid-T Baked Niobium Cavities through Post-Bake Surface Treatment
he Medium temperature (mid-T) baking of niobium superconducting radio-frequency cavities at 300 350 C in a vacuum furnace is known to enhance the quality factor (Q₀). However, despite this improvement, cavities treated with this process often exhibit premature quench at relatively low accelerating fields. This limitation is suspected to arise from the formation of surface contaminants, such as niobium carbides, during the furnace bake at 350 C for 3 h. To investigate the influence of potential surface contamination, this study applied an ultralight chemical removal to 1.3 GHz and 650 MHz single-cell cavities that had undergone medium-temperature baking. The removal of the top RF surface layer led to a notable improvement in the quench field and Q₀, indicating a beneficial effect of eliminating possible surface residues introduced during the bake.
Chouhan, Vijay [Fermilab]↗
Centrifugal Barrel Polishing of a 650 MHz Single-Cell Nb Cavity
This work reports the first application of centrifugal barrel polishing (CBP) to a 650 MHz single-cell niobium superconducting radio frequency cavity. The CBP was performed using a newly installed large tumbler designed to accommodate four large-sized 650 MHz multi-cell cavities. The CBP process was applied to smooth the internal surface of the cavity prior to electropolishing. This study describes the CBP procedure and presents surface results following the CBP process.
Chouhan, Vijay [Fermilab]↗