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Conference Poster Year : 2019

Profiling the temperature-dependent frequency of an open-magnet for outdoor applications

Profil de la dépendance en température d'un aimant unilatéral pour des applications in-situ

Abstract

Low-field NMR relaxometers are powerful instruments as they can be moved outside the laboratory to be closer to the sample (in fields or next to a production line), for on-line quality control for example. Openmagnets present the advantages of (i) being slice selective and (ii) able to record 1D NMR profile if the magnet is mounted on a high-precision lift. The NMR-MOUSE is an example of a device combining both features. This magnet can measure the NMR signal at various depths (NMR profile) with a resolution as low as few tens of micrometers. However, the magnet frequency distribution of such instrument is dependent on the magnet temperature, which is currently nor regulated nor controlled. Hence, its performance might be questioned in case of temperature fluctuations (e.g. outdoor applications), inducing unintended variations in the position of the slice. In this work, we aim at characterizing the NMR profile shift as a function of the magnet temperature. For this, we measured the profile of a doped water sample while the surrounding temperature of the magnet was varied. We clearly observed a linear variation of the water profile position for temperatures between 10 and 35
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Dates and versions

hal-02609763 , version 1 (16-05-2020)

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A. Traore, Corinne C. Rondeau-Mouro, R. Alouissi, A. Benmoussa, J.-M. Bonny, et al.. Profiling the temperature-dependent frequency of an open-magnet for outdoor applications. EUROISMAR, Aug 2019, Berlin, Germany. 2019. ⟨hal-02609763⟩
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