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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2509.13555 |
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| _version_ | 1866911158225600512 |
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| author | Harbick, Aiden Transtrum, Mark Sitaraman, Nathan Arias, Tomás Liepe, Matthias |
| author_facet | Harbick, Aiden Transtrum, Mark Sitaraman, Nathan Arias, Tomás Liepe, Matthias |
| contents | Research linking surface hydrides to Q-disease, and the subsequent development of methods to eliminate surface hydrides, is one of the great successes of SRF cavity R&D. We use time-dependent Ginzburg-Landau to extend the theory of hydride dissipation to sub-surface hydrides. Just as surface hydrides cause Q-disease behavior, we show that sub-surface hydrides cause high-field Q-slope (HFQS) behavior. We find that the abrupt onset of HFQS is due to a transition from a vortex-free state to a vortex-penetration state. We show that controlling hydride size and depth through impurity doping can eliminate HFQS. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_13555 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A Computational Picture of Hydride Formation and Dissipation In Nb SRF Cavities Harbick, Aiden Transtrum, Mark Sitaraman, Nathan Arias, Tomás Liepe, Matthias Superconductivity Accelerator Physics Research linking surface hydrides to Q-disease, and the subsequent development of methods to eliminate surface hydrides, is one of the great successes of SRF cavity R&D. We use time-dependent Ginzburg-Landau to extend the theory of hydride dissipation to sub-surface hydrides. Just as surface hydrides cause Q-disease behavior, we show that sub-surface hydrides cause high-field Q-slope (HFQS) behavior. We find that the abrupt onset of HFQS is due to a transition from a vortex-free state to a vortex-penetration state. We show that controlling hydride size and depth through impurity doping can eliminate HFQS. |
| title | A Computational Picture of Hydride Formation and Dissipation In Nb SRF Cavities |
| topic | Superconductivity Accelerator Physics |
| url | https://arxiv.org/abs/2509.13555 |