Measurements of the gradient-induced power deposition in the He-bath of the Iseult 11.7T magnet and comparison with theory
Motivation: Experimental characterization and understanding of the power deposition in the He bath of an ultra-high field magnet is important for magnet safety. Goal(s): We report a quasi-analytical model for the Z gradient axis power deposition and compare it with measurements. Approach: The model was based on three cylinders consisting of the He vessel, the cryoshield and the outer vacuum chamber. Coupled partial differential equations involving both electromagnetism and elasticity were derived and solved. Results: Our model predicts accurately the positions of the cryogenic peaks but underestimates by about a factor of 2-3 the largest ones. Impact: When the symmetry and underlying assumptions are met, the model allows determining the location of the resonance peaks and can alert the user of potential dangerous frequency zones where caution during first experiments should be exercised.
Authors
- Caroline Le Ster (ORCID: https://orcid.org/0000-0002-4767-8738)
- Alexis Amadon (ORCID: https://orcid.org/0000-0002-2667-9387)
- Franck Mauconduit (ORCID: https://orcid.org/0000-0002-0128-061X)
- J. Belorgey (ORCID: https://orcid.org/0000-0001-8657-5929)
- Quentin Guihard
- Olivier Dubois
- Nicolas Boulant (ORCID: https://orcid.org/0000-0003-2144-2484)
- H. Lannou
- F.P. Juster (ORCID: https://orcid.org/0000-0002-6108-176X)
- L. Quettier (ORCID: https://orcid.org/0000-0002-8496-4055)
- Alexandre Vignaud (ORCID: https://orcid.org/0000-0001-9203-0247)
- G. Aubert (ORCID: https://orcid.org/0000-0001-9710-4815)
- C. Bonnelye
- F. Nunio (ORCID: https://orcid.org/0000-0002-2485-2422)
- Vincent Gras
Publication Details
- Journal
- Proceedings on CD-ROM - International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition/Proceedings of the International Society for Magnetic Resonance in Medicine, Scientific Meeting and Exhibition
- Published
- 2024-11-26
- DOI
- https://doi.org/10.58530/2024/3938
- Primary Topic
- Quantum, superfluid, helium dynamics
- Type
- article
- Field-Weighted Citation Impact
- 0.00