A portable, submersible, MR sensor – The Proteus magnet

[Display omitted] •The design, fabrication, and testing of a new portable MR sensor.•Employing a pair of permanent magnets to generate reasonably homogeneous fields.•Well suited for 1H measurements of liquids.•Performed measurements include bulk CPMG, self-diffusion, D – T2 and T1 – T2. This paper d...

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Bibliographic Details
Published in:Journal of magnetic resonance (1997) 2021-05, Vol.326, p.106964-106964, Article 106964
Main Authors: Ross, Michael M.B., Wilbur, Grant R., Cano Barrita, Prisciliano F.de J., Balcom, Bruce J.
Format: Article
Language:English
Subjects:
CPMG
D – T2
Diffusion
Dipole magnets
Immersion sensor
Magnetic resonance
Portable NMR
Proteus
T1 – T2
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Summary:[Display omitted] •The design, fabrication, and testing of a new portable MR sensor.•Employing a pair of permanent magnets to generate reasonably homogeneous fields.•Well suited for 1H measurements of liquids.•Performed measurements include bulk CPMG, self-diffusion, D – T2 and T1 – T2. This paper details the design, fabrication, and testing of a new portable magnet, generically termed the Proteus magnet, that can undertake a wide range of MR measurements. The Proteus magnet is intended for 1H measurements of liquids and is fully functional when submersed in the sample of interest. The Proteus magnet is fabricated from a pair of low-cost, commercial, NdFeB disk magnets, axially polarized, with their North and South poles aligned. The two N52 NdFeB magnets – 31.75 mm diameter and 6.35 mm thickness were separated by 10 mm. The gap between the magnets is sufficient for a RF shield and transverse rectangular solenoid RF probe. The sensor was evaluated through a series of measurements including bulk CPMG, saturation recovery T1, self-diffusion, T1 – T2, and D – T2.
ISSN:1090-7807
1096-0856
DOI:10.1016/j.jmr.2021.106964