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Originally Posted by humhum
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Hi humhum,
These are very interesting links that explain NMR and NMR measuring instruments.
In your first link, I see a lot of good information about hydrogen resonance in various organic compounds that can be found when using a superconducting magnet to create a 2.35 Tesla magnetic field.
Your second link shows a portable NMR sensor made by researchers from the Berkeley Laurence Laboratory, University of California, and the Institute for Technical Chemistry in Germany.
They found a way to arrange a large Neodymium-Iron-Boron rare earth magnet produce a 0.2 Tesla magnetic field that could detect NMR.
It is good they were able to produce a 0.2 Tesla field, or it wouldn't work, according to the researchers.
“The variations within the magnetic fields of previous portable NMR devices are usually orders of magnitude too large to detect chemical shifts,”
Your third link shows another portable NMR sensor used by scientists near the north pole.
Since they are only looking for structural details of ice, they are not using equipment to identify the hydrogen in the ice.
They are trying to make images more like an MRI image that show the brine pockets in the ice samples they placed inside the coil of their Tecmag-Aries NMR system.
This Tecmag Aries MNR sytem can make images using only a 0.03 Tesla magnetic field, when you are using their software to display it on a computer.
The decay times look roughly similar to what we see on a proton magnetometer for distilled water to precess.
Do you think any of these articles show equipment that you think sakis1 connected to his PD using the metal locator circuit above?
Best wishes,
J_P