Publications
Publication Information
| Title | Analysis of Surface Nitrides Created During "Doping" Heat Treatments of Niobium | ||
| Authors | Joshua Spradlin, Hui Tian, Ari Palczewski, Charles Reece | ||
| JLAB number | JLAB-ACC-19-2989 | ||
| LANL number | (None) | ||
| Other number | DOE/OR/23177-4739 | ||
| Document Type(s) | (Meeting) | ||
| Associated with EIC: | No | ||
| Supported by Jefferson Lab LDRD Funding: | No | ||
| Funding Source: | Nuclear Physics (NP) | ||
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Meeting Poster compiled for SRF 2019 (19th International Conference on RF Superconductivity) Proceedings Proceedings of SRF 2019 Edited By Peter Michel, André Arnold, Volker RW Schaa JACOW (2019) Page(s) 106 | |||
| Publication Abstract: | The benefits of reduced RF losses from interstitial "doping" of niobium are well established. Many of the details involved in the process remain yet to be elucidated. The niobium surface reacted with low-pressure nitrogen at 800°C presents a surface with chemical reactivity different than standard niobium. While standard "recipes" are being used to produce cavities, we seek additional insight into the chemical processes that may be used to remove the "undesirable" as-formed surface layer. This may lead to new processing routes or quality assurance methods to build confidence that all surface "nitrides" have been removed. We report a series of alternate chemistry treatments and subsequent morphological examinations and interpret the results. We also introduce a new standardized Nb sample system in use for efficient characterization of varying doping protocols and cross-laboratory calibration. | ||
| Experiment Numbers: | other | ||
| Group: | SRF Research & Dev | ||
| Document: | |||
| DOI: | https://doi.org/10.18429/JACoW-SRF2019-MOP030 | ||
| Accepted Manuscript: | mop030.pdf | ||
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