STI Publications - View Publication Form #16737
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Publication Information
| Title | Magnetic field sensors for detection of trapped flux in superconducting radio frequency cavities | ||||
| Abstract | Superconducting radio-frequency (SRF) cavities are fundamental building block of modern particle accelerators. They operate at liquid helium temperatures 2-4 K to achieve very high quality factors 1e10-1e11. Trapping of magnetic flux within the superconductor is a significant contribution to the residual RF losses which limit the achievable quality factor. Suitable diagnostic tools are in high demand to understand the mechanisms of flux trapping in technical superconductors and the fundamental components of such diagnostic tool are magnetic field sensors. We have studied the performance of commercially available Hall probes, anisotropic magnetoresistive sensors and flux-gate magnetometers with respect to their sensitivity and capability to detect localized, low magnetic flux amplitudes, of the order of few tens of magnetic flux quantum at liquid helium temperature. Although Hall probes have the lowest magnetic field sensitivity (~96$ nV$/microT at 2 K), their physical dimensions are su | ||||
| Author(s) | Ishwari Parajuli, Gianluigi Ciovati, Jean Delayen | ||||
| Publication Date | October 2021 | ||||
| Category | SRF Technology | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Old Dominion University | ||||
| Affiliation | Accelerator Ops, R&D / Inst for SRF Sci & Tech / SRF Research & Dev | ||||
| Funding Source | Nuclear Physics (NP), NSF Grant PHY 100614-010 | ||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | No | ||||
| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Review of Scientific Instruments |
| Refereed | Yes |
| Volume | 92 |
| Issue | |
| Page(s) | 104705 |
Attachments/Datasets/DOI Link
| Document(s) |
RSI21-AR-01591_rev11.pdf
(STI Document)
RSI21-AR-01591_rev11.pdf
(Accepted Manuscript)
RSI21-AR-01591_rev1.pdf
(Accepted Manuscript)
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| DOI Link | |
| Dataset(s) | (none) |
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