Homogenous static magnetic field coils dedicated to portable nuclear magnetic resonance for agronomic studies
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 con...
| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2018-04-01
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| Series: | Journal of Sensors and Sensor Systems |
| Online Access: | https://www.j-sens-sens-syst.net/7/227/2018/jsss-7-227-2018.pdf |
| Summary: | 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
<i>B</i><sub>0</sub> and the radio-frequency field <i>B</i><sub>1</sub>. The wire winding distribution
based on space harmonics suppression (SHS) of the cosine current density
distribution offers new possibilities of producing homogenous static fields
<i>B</i><sub>0</sub>. 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) <sup>1</sup><i>H</i> NMR
spectrometer. The performance of these coils in terms of magnetic field
intensity and homogeneity as well as self-heating behavior is compliant with
<i>in planta</i> experiments for agronomic studies. |
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| ISSN: | 2194-8771 2194-878X |