Patent
Controlled susceptibility plugs
TLDR
In this paper, the magnetic susceptibility of materials can be tailored to achieve a desired value to suppress magnetic perturbation without introducing extraneous signals, where the sample is rotated along an axis transverse to the field.Abstract:
It is desired to promote magnetic homogeneity of materials, including structural elements, present in the sensitive volume of a gyromagnetic analysis apparatus. Where the sample is rotated along an axis transverse to the field the requirement reduces to establishing axial homogeneity. Plugs which match the solvent magnetic susceptibility are employed to constrain a sample within the central region of an RF probe coil thereby appearing relatively invisible in the magnetic sense to the instrument. The susceptibility of materials can be tailored to achieve a desired value to suppress magnetic perturbation without introducing extraneous signals.read more
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Patent
Low-inductance transverse litz foil coils
TL;DR: In this article, a two-element Litz foil conductor group is proposed for NMR coils with two flux sub-windows, where the foils are joined at node (1) and node (2) and are electrically insulated at crossover (3).
Patent
Edge-wound solenoids and strongly coupled ring resonators for NMR and MRI
TL;DR: An edge-wound NMR solenoidal sample coil is made by winding at least two turns of flattened wire around a cylindrical coilform such that the major cross-sectional axis of the flat wire is perpendicular to the axis of a solenoid as mentioned in this paper.
Patent
Sample tube for nuclear magnetic resonance apparatus
TL;DR: A sample tube for the use in a nuclear magnetic apparatus comprising a sample tube, said sample tube being formed of a glass substance, wherein the magnetic susceptibility of said glass substance has been adjusted by incorporating therein a sufficient amount of one or more paramagnetic and/or diamagnetic substances so as to impart to the sample tube a magnetic susceptibility proximate to that of a liquid sample.
Patent
RF receiver coil configuration for an NMR spectrometer
TL;DR: In this paper, an RF receiver coil configuration for NMR spectrometers has at least two largely mutually orthogonal RF receiver coils systems of which at least one is made from superconducting material and is at least partially cooled to a cryogenic temperature lying far below room temperature.
Patent
NMR sample shaper
TL;DR: Improved NMR sample tube shapes and inserts for standard tubes to shape the sample for greater homogeneity to provide symmetry of liquid sample and tube to a greater distance from the observe region for the same volume of sample as used in the prior art as discussed by the authors.
References
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Patent
Nuclear magnetic resonance sample tube insert
TL;DR: In this article, an insert for insertion into a circularly cross-sectioned sample tube for use in nuclear magnetic resonance spectrometry for reducing temperature variations in the sample and dispersing heat generated.
Patent
Long the sample cavity resonator structure for an epr spectrometer employing dielectric material for improving rf electric and magnetic field uniformity a
TL;DR: In an electron paramagnetic resonance cavity resonator having a line sample therein, a dielectric material positioned near the sample and along at least a portion of its length, and extending into the RF electric field region near a sample, changes the gradient of the electric field intensity and, as a result, the RF magnetic field intensity along the line sample so as to make both the electric and magnetic field intensities more uniform along as discussed by the authors.
Patent
NMR Test method for dispersion of solids in elastomer compositions
TL;DR: In this article, an NMR test method is provided for determining the homogeneity of dispersion of a filler substance such as carbon black in an elastomer composition such as a rubber.
Patent
Sample cells for electron-resonance tests
TL;DR: A sample cell for the reception of highly polar samples to be tested for EPR comprises two parts which are so fitted together as to form a tube of rectangular cross section inside and annular cross section outside as mentioned in this paper.