NMR probehead with a plurality of resonator systems for simultaneous measurement of a plurality of samples in a coupled mode
A nuclear magnetic resonance(=NMR) probehead, comprising N basic elements ( 10 a, 10 b, 10 c ), where N≧2, wherein each basic element ( 10 a, 10 b, 10 c ) comprises a measurement sample ( 11 ) and a resonator system ( 12 a, 12 b, 12 c ), and wherein the N resonator systems ( 12 a, 12 b, 12 c ) of the N basic elements ( 10 a, 10 b, 10 c ) are coupled to each other, is characterized in that a coupling network for the N resonator systems ( 12 a, 12 b, 12 c ) is provided, with which the totality of the N resonator systems ( 12 a, 12 b, 12 c ) can be operated in one identical, coupled mode during transmission and reception, wherein the coupling network comprises a shared receiver circuit for the totality of the N resonator systems ( 12 a, 12 b, 12 c ). With the inventive NMR probehead, a better signal-to-noise ratio can be achieved in the case of lossy samples than with probeheads according to the prior art.
1. A nuclear magnetic resonance (=NMR) probehead, the probehead comprising:
N basic elements, wherein N≧2, each basic element structured and dimensioned to accommodate a measurement sample and each basic element having a resonator system, N resonator systems of said N basic elements being coupled to each other within a coupling network, said coupling network having one common receiver circuit for a totality of said N resonator systems, wherein said totality of said N resonator systems is operated in one identical, coupled mode during transmission and reception, a substance to be measured thereby being divided into N measurement samples wherein said N basic elements and said associated N resonator systems form a resonator complex that is operated as a single unit and simultaneously readout with said common receiver circuit.
2. The NMR probehead of claim 1 , wherein said N basic elements are disposed in a ring-shaped or circular fashion.
3. The NMR probehead of claim 2 , further comprising a lock coil disposed at a center of a ring-shaped configuration of said basic elements.
4. The NMR probehead of claim 1 , wherein said N resonator systems are constituted as saddle coils, as Alderman-Grant resonators, or as birdcage resonators.
5. The NMR probehead of claim 4 , wherein the NMR probehead exhibits a circular-ring-shaped configuration of saddle coils, a measurement sample being disposed inside each saddle coil and conductor turns of each saddle coil facing two respective adjacent saddle coils.
6. The NMR probehead of claim 1 , wherein said N resonator systems are constituted as planar Helmholz coils or as planar resonators.
7. The NMR probehead of claim 6 , wherein the NMR probehead comprises a circular-ring-shaped configuration of planar Helmholz coils, a measurement sample being disposed inside each planar Helmholz coil and said planar Helmholz coils, with flat substrate boards thereof, are radially aligned.
8. The NMR probehead of claim 6 , wherein the NMR probehead comprises a circular-ring-shaped configuration of planar resonators and a measurement sample is disposed between each pair of consecutive planar resonators, wherein said planar resonators are each radially aligned.
9. The NMR probehead of claim 6 , wherein the N resonator systems have conductor paths made of high-temperature superconductors.
10. The NMR probehead of claim 1 , wherein N≧6 N≧8, or N ≧12.
11. The NMR probehead of claim 1 , further comprising at least one additional resonator system for a further measurement frequency.
12. The NMR probehead of claim 11 , wherein said additional resonator system is constituted as a saddle coil, inside which said N basic elements are disposed.
13. A nuclear magnetic resonance (=NMR) probehead, the probehead comprising:
N basic elements, wherein N≧2, each basic element structured and dimensioned to accommodate a measurement sample and each basic element having a resonator system, N resonator systems of said N basic elements being coupled to each other within a coupling network, said coupling network having one common receiver circuit for a totality of said N resonator systems, wherein said totality of said N resonator systems is operated in one identical, coupled mode during transmission and reception, said N basic elements being disposed in a ring-shaped or circular fashion, wherein the NMR probehead is constituted in such a way as to generate a toroidal mode, in which a common, ring-shaped closed B 1 magnetic field line runs through all N measurement samples wherein said N basic elements and said associated N resonator systems form a resonator complex that is operated as a single unit and simultaneously readout with said common receiver circuit.
14. A nuclear magnetic resonance (=NMR) probehead, the probehead comprising:
N basic elements, wherein N≧2, each basic element structured and dimensioned to accommodate a measurement sample and each basic element having a resonator system, N resonator systems of said N basic elements being coupled to each other within a coupling network, said coupling network having one common receiver circuit for a totality of said N resonator systems, wherein said totality of said N resonator systems is operated in one identical, coupled mode during transmission and reception, said N basic elements being disposed in a ring-shaped or circular fashion, wherein the NMR probehead is constituted to generate an N-tupole mode, in which a common, ring-shaped closed B 1 magnetic field line passes through pairs of adjacent measurement samples wherein said N basic elements and said associated N resonator systems form a resonator complex that is operated as a single unit and simultaneously readout with said common receiver circuit.