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| URL | https://doi.org/10.18429/JACoW-HIAT2025-TUC03 |
|---|---|
| Title | Development of plasma processing for superconducting half-wave resonators |
| Authors |
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| Abstract | Several groups have demonstrated that plasma processing can help to mitigate degradation of the performance of superconducting radio-frequency cavities, making plasma processing a promising alternative to removal of cryomodules from the accelerator for refurbishment. Studies of plasma processing for quarter-wave resonators (QWRs) and half-wave resonators (HWRs) are underway at FRIB, where a total of 324 such resonators are presently in operation. Challenges for this effort include the high FPC mismatch at room temperature, the limited view of the cavity interior, and the absence of higher-order mode (HOM) couplers. A plasma processing trial on a QWR cryomodule, driving the plasma with HOMs via the fundamental power coupler (FPC) was done in January 2024. In parallel with QWR development, plasma processing tests are being done on HWRs, so far driving the plasma with the fundamental mode via a custom antenna or the FPC. Before-and-after cold tests suggest that plasma processing has good potential for reduction of field emission in HWRs. |
| Paper | download: TUC03.pdf |
| Cite | BibTeX, LaTeX, Text/Word, RIS, EndNote |
| Conference | 16th International Conference on Heavy Ion Accelerator Technology |
| Series | |
| Location | East Lansing, MI, USA |
| Date | 22-27 Jun 2025 |
| Publisher | JACoW Publishing, Geneva, Switzerland |
| Editorial Board | Ling Wang (FRIB/MSU), Kelly Jaje (ANL), Michelle Wier (FRIB/MSU), Kent Wootton (ANL), Tong Zhang (FRIB/MSU) |
| Online ISBN | 978-3-95450-260-8 |
| Online ISSN | 2673-5547 |
| Received | 01 August 2025 |
| Revised | 27 August 2025 |
| Accepted | 27 August 2025 |
| Issued | 13 October 2025 |
| DOI | 10.18429/JACoW-HIAT2025-TUC03 |
| Pages | 118-121 |
| Copyright | Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |