Double-resonance structure and method for investigating samples by DNP and/or ENDOR
AssigneeJohann Wolfgang Goethe-Universität Frankfurt am Main
InventorsThomas Prisner, Vasyl Denysenkov
Life of this patent
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Abstract
A double-resonance structure for DNP-NMR experiments and/or ENDOR experiments and methods using such a double-resonance structure. The double-resonance structure comprises a microwave resonator for generating electromagnetic fields suitable for EPR and an HF resonator for generating electromagnetic fields suitable for NMR. The HF resonator is formed by a strip resonator, a section of the strip resonator at the same time forming a portion of the microwave resonator.
Claims29
A double-resonance structure for DNP-NMR and/or ENDOR experiments, the double resonance structure comprising:
- a microwave resonator, including at least one planar reflector, for generating electromagnetic fields suitable for EPR;
- and
- an HF resonator for generating electromagnetic fields suitable for NMR, formed by a strip resonator, such that a section of the strip resonator at the same time forms the planar reflector of the microwave resonator.
A double-resonance structure for DNP and/or ENDOR experiments, comprising a microwave resonator with a conductive spherical reflector and an iris, by means of which the spherical reflector is coupled to a microwave source or a microwave receiver, and with a conductive planar strip-shaped reflector, which at the same time functions as an HF resonator.
A DNP-NMR spectrometer, comprising the following:
- a double-resonance structure, said double-resonance structure having a microwave resonator for generating electromagnetic fields suitable for EPR, and having an HF resonator for generating electromagnetic fields suitable for NMR, wherein the HF resonator is formed by a strip resonator such that a section of the strip resonator at the same time forms a planar reflector of the microwave resonator,
- a microwave source connected to the double-resonance structure for input of microwaves into the microwave resonator, and an NMR device connected to the double-resonance structure for input of HF signals into the strip resonator and for receiving HF signals from the strip resonator.
An ENDOR spectrometer comprising:
- a double-resonance structure, said double-resonance structure having a microwave resonator for generating electromagnetic fields suitable for EPR, and having an HF resonator for generating electromagnetic fields suitable for NMR, wherein the HF resonator is formed by a strip resonator such that a section of the strip resonator at the same time forms a planar reflector part of the microwave resonator;
- a microwave source connected to the double-resonance structure for input of microwaves into the microwave resonator and for receiving microwaves from the microwave resonator;
- and
- an HF source connected to the double-resonance structure for input of HF signals into the strip resonator.
A combined DNP-NMR/ENDOR spectrometer comprising:
- a double-resonance structure, said double-resonance structure having a microwave resonator for generating electromagnetic fields suitable for EPR, and having an HF resonator for generating electromagnetic fields suitable for NMR, wherein the HF resonator is formed by a strip resonator such that a section of the strip resonator at the same time forms a planar reflector of the microwave resonator;
- a microwave device suitable for input of microwave signals into the microwave resonator of the double-resonance structure in an NMR mode, and for input of microwaves into the microwave resonator of the double-resonance structure and for receiving and detecting microwave signals from the microwave resonator in an ENDOR mode;
- and
- a high-frequency device suitable for input of HF signals into the strip resonator of the double-resonance structure, receiving and detecting HF signals from the strip resonator in an NMR mode, and for input of HF signals into the strip resonator in an ENDOR mode.
A method for investigating samples by means of DNP-NMR and/or ENDOR, the method comprising:
- arranging a sample in a double-resonance structure, said double-resonance structure comprising a microwave resonator and an HF strip resonator wherein the HF strip resonator forms a planar reflector of the microwave resonator;
- generating a microwave field, said microwave field being suitable for inducing EPR transitions in the sample;
- and
- generating an HF field, said HF field being suitable for inducing NMR transitions in the sample, the method characterized in that the HF resonator is formed by a strip resonator, such that a section of the strip resonator at the same time forms a part of the microwave resonator.
Dependencies are inferred from the claim text.