Homogenous static magnetic field coils dedicated to portable nuclear magnetic resonance for agronomic studies

Sidi-Boulenouar Rahima, Reis Ariston, Nativel Raymond, Buy Simon, De Pellegars Pauline, Liu Pan, Zanca Michel, Goze-Bac Christophe, Barbat Jérome, Alibert Eric, Verdeil Jean-Luc, Gatineau Frédéric, Bertin Nadia, Anand Atma, Coillot Christophe. 2018. Homogenous static magnetic field coils dedicated to portable nuclear magnetic resonance for agronomic studies. Journal of Sensors and Sensor Systems, 7 : 227-234.

Résumé : Nuclear magnetic resonance (NMR) experiments are usually carried out at very high and homogenous magnetic fields. However, portable systems have emerged in recent years at low fields, offering many advantages like easier maintenance and open design that permit us to imagine a variety of coil configurations in order to maximize the homogeneity of the static field B0 and the radio-frequency field B1. The wire winding distribution based on space harmonics suppression (SHS) of the cosine current density distribution offers new possibilities of producing homogenous static fields B0. In this work, an extension of the SHS method, allowing homogeneity enhancement and flexibility of the coil design, is presented. The efficiency of the method is demonstrated through the construction of homogenous magnetic field coils dedicated to a very low magnetic field (8 mT) 1H NMR spectrometer. The performance of these coils in terms of magnetic field intensity and homogeneity as well as self-heating behavior is compliant with in planta experiments for agronomic studies.

Mots-clés Agrovoc : spectroscopie RMN, champ magnétique, recherche agronomique

Classification Agris : U50 - Sciences physiques et chimie

Champ stratégique Cirad : Hors axes (2014-2018)

Auteurs et affiliations

• Sidi-Boulenouar Rahima, Université de Montpellier (FRA) - auteur correspondant
• Reis Ariston, Université de Montpellier (FRA)
• Nativel Raymond, CIRAD-PERSYST-UPR AIDA (REU)
• Buy Simon, Université de Montpellier (FRA)
• De Pellegars Pauline, AxLR SATT (FRA)
• Liu Pan, Université de Montpellier (FRA)
• Zanca Michel, UM2 (FRA)
• Goze-Bac Christophe, UM2 (FRA)
• Barbat Jérome, Université de Montpellier (FRA)
• Alibert Eric, Université de Montpellier (FRA)
• Verdeil Jean-Luc, CIRAD-BIOS-UMR AGAP (FRA)
• Gatineau Frédéric, CIRAD-BIOS-UMR AGAP (FRA)
• Bertin Nadia, INRA (FRA)
• Anand Atma, Indian Institute of Space Science and Technology (IND)
• Coillot Christophe, Université de Montpellier (FRA) - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/598917/)

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