17results about "Measurements using double resonance" patented technology

In a general aspect, a magnetic resonance system performs a magnetic resonance measurement. In some examples, a magnetic resonance system includes data processing apparatus and a superheterodyne spectrometer system. The data processing apparatus generates digital intermediate frequency (IF) signal information based on a pulse profile. The digital IF signal information is configured to suppress an image sideband in a magnetic resonance control signal. The superheterodyne spectrometer generates the magnetic resonance control signal based on the digital IF signal information.

In a general embodiment, a magnetic resonance system performs magnetic resonance measurements. In some examples, the magnetic resonance system includes a data processing unit and a superheterodyne spectrometer system. The data processing unit generates digital intermediate frequency (IF) signal information based on the pulse profile. The digital IF signal information is configured to suppress image sidebands in the magnetic resonance control signal. The superheterodyne spectrometer generates the magnetic resonance control signal based on the digital IF signal information.

The invention relates to an NMR-DNP probe comprising a sample holder, a temperature control device, a microwave guide and an illumination device, characterized in that the temperature control device comprises a VT channel through which a temperature control fluid can be supplied to the sample container for temperature control of the sample substance in NMR measurement mode, a sample-side end of the light guide is arranged in the VT channel, and a deflection mirror is arranged in the VT channel between the sample-side end of the light guide and the sample container, which directs the light exiting the light guide onto the sample substance in the sample volume of the sample container. This allows additional light excitation with adjustable beam width to illuminate the NMR test sample within the probe without negatively affecting the magnetic field or RF. Furthermore, optical excitation in the UV range can also be realized. The optical fiber is integrated into the probe with a very small bending radius. The invention also relates to a bearing bushing for use in an NMR-MAS probe and to an NMR spectrometer.

A system and method for increasing the nuclear spin polarization of a target compound are disclosed. [Solution] According to this system and method, a first non-thermal equilibrium nuclear spin polarization may be conferred to a source atom of at least one source compound, the source atom having a nuclear gyromagnetic ratio of at least 12 megahertz (MHz / T) per tesla. A first solution containing the source compound and the target compound can be obtained. At least one source atom can be present in the first solution at a source concentration of at least 0.1 moles (M). At least 0.01% of a second non-thermal equilibrium nuclear spin polarization can be conferred to at least one target atom of the target compound via nuclear Overhauser effect (NOE) transfer of the first non-thermal equilibrium nuclear spin polarization to at least one target atom.

The invention relates to a magnetic field sensor (1) with an NV diamond (2), an excitation light source (3) configured to emit an excitation beam (4) for exciting electronic states of the NV diamond (2), and arranged such that the excitation beam (4) emitted by it can generate an electric field within the NV diamond (2), a detector (5) arranged and configured to detect fluorescence radiation that the NV diamond (2) can emit as a result of irradiation with the excitation radiation (4), a microwave structure (6) arranged and configured to generate a microwave field within the NV diamond (2) for manipulating spin states of the NV diamond (2), a magnetic field generating device (7) configured to generate an internal, static magnetic field within the NV diamond (2), and comprising at least one permanent magnet (8), and a hood (10). and a base plate (11),which are arranged to form a closed chamber (12). The NV diamond (2), the excitation light source (3), the detector (5), and the microwave structure (6) are arranged within the closed chamber (12). The hood (10) has at least one recess (13) for receiving the at least one permanent magnet (8, 9).

The invention relates to a method and a device for evaluating a measurement signal (5') emanating from a spin-based quantum system (4), comprising exciting the spin-based quantum system (4) by a pulsed excitation light (13; 220), alternately exposing the spin-based quantum system (4) to a first and a second series of magnetic field pulses (211; 212), wherein one of the first and second series of magnetic field pulses (211; 212) consists of two π 2 − Pulse contains, and the other of the first and second magnetic field pulse sequence (211; 212) a π 2 − Puls 2 and one − π 2 − Puls includes, a detection of the measurement signal (5') emanating from the spin-based quantum system (4), an integration of the measurement signal (5') over an integration window (231) containing a signal time of a light pulse (222) of the pulsed excitation light (13; 320) between the first magnetic field pulse sequence (211) and the second magnetic field pulse sequence (212) and between the second magnetic field pulse sequence (212) and the first magnetic field pulse sequence (211) to obtain a first and a second signal value, and a determination of a measured value from the first and the second signal value.

A system and method for increasing the nuclear spin polarization of a target compound are disclosed. According to such a system and method, a first non-thermal equilibrium nuclear spin polarization may be imparted to source atoms of at least one source compound, the source atoms having a nuclear gyromagnetic ratio of at least 12 megahertz per Tesla (MHz / T). A first solution including a source compound and a target compound can be obtained. The at least one source atom can be present in the first solution at a source concentration of at least 0.1 molar (M). A second non-thermal equilibrium nuclear spin polarization of at least 0.01% can be imparted to at least one target atom of the target compound via a Nuclear Overhauser Effect (NOE) transfer of the first non-thermal equilibrium nuclear spin polarization to at least one target atom.

The invention relates to a device for measuring intracorporeally generated magnetic fields, comprising: a catheter, wherein a fiber optic device is arranged within the catheter, a sensor unit for measuring magnetic fields, the sensor unit is a nitrogen vacancy center magnetometer, which, as a sensor medium, comprises diamond crystals having one or more nitrogen-vacancy centers, wherein one or more diamond crystals are arranged within the optical fiber device, wherein the sensor unit comprises a magnetic field generation device for generating a magnetic field in the area of ​​the sensor medium, wherein the sensor unit comprises an excitation light source for shining excitation light into the light guide device in order to excite the sensor medium, wherein the sensor unit comprises a microwave source for generating microwaves to excite the sensor medium with microwaves, and wherein the sensor unit comprises a photodetector for detecting resonance-dependent fluorescence light from the sensor medium and an evaluation unit which is set up to determine a magnetic field at the respective location of one or more diamond crystals based on the detected fluorescence light. The invention relates to a method for measuring intracorporeally generated magnetic fields, a computer program and a machine-readable storage medium.

Systems and methods are disclosed for increasing a nuclear spin polarization of a target compound. In accordance with such systems and methods, a first non-thermal equilibrium nuclear spin polarization can be imparted to at least one source atom of a source compound, the source atom having a nuclear gyromagnetic ratio of at least 12 megahertz per tesla (MHz / T). A first solution can be obtained that includes the source compound and a target compound. The at least one source atom can be present in a source concentration of at least 0.1 molar (M) in the first solution. A second non-thermal equilibrium nuclear spin polarization of at least 0.01% can be imparted to the at least one target atom of the target compound via a nuclear Overhauser effect (NOE) transfer of the first non-thermal equilibrium nuclear spin polarization to the at least one target atom.

The invention relates to a method for generating a useful signal (11) from a signal (5') emanating from a spin-based quantum system (4), comprising exciting the spin-based quantum system (4) by an excitation light (13), exciting the spin-based quantum system (4) by an electromagnetic field (3) which oscillates between two measurement frequencies at a modulation frequency, wherein the two measurement frequencies have a first measurement frequency difference from an expected resonance frequency, detecting the signal (5') emanating from the spin-based quantum system (4) to obtain a measurement signal (7), multiplying the measurement signal (7) with a modulation signal (9) which oscillates between two modulation signal states at the modulation frequency to generate a modulated measurement signal (7'), demodulating the modulated measurement signal (7') to generate the useful signal (11), and determining a reference signal.and determining whether the expected resonant frequency value is correct, based on the reference signal.

In a general aspect, a magnetic resonance system performs a magnetic resonance measurement. In some examples, a magnetic resonance system includes data processing apparatus and a superheterodyne spectrometer system. The data processing □ apparatus generates digital intermediate frequency (IF) signal information based on a pulse profile. The digital IF signal information is configured to suppress an image sideband in a magnetic resonance control signal. The superheterodyne spectrometer generates the magnetic resonance control signal based on the digital IF signal information.

In a general aspect, a magnetic resonance system performs a magnetic resonance measurement. In some examples, a magnetic resonance system includes data processing apparatus and a superheterodyne spectrometer system. The data processing apparatus generates digital intermediate frequency (IF) signal information based on a pulse profile. The digital IF signal information is configured to suppress an image sideband in a magnetic resonance control signal. The superheterodyne spectrometer generates the magnetic resonance control signal based on the digital IF signal information.

It provides digital operation for magnetic resonance systems. [Solution] In a general embodiment, a magnetic resonance system performs magnetic resonance measurements. In some examples, the magnetic resonance system includes a data processing unit and a superheterodyne spectrometer system. The data processing unit generates digital intermediate frequency (IF) signal information based on a pulse profile. The digital IF signal information is configured to suppress image sidebands in the magnetic resonance control signal. The superheterodyne spectrometer generates a magnetic resonance control signal based on the digital IF signal information.

The invention relates to a method for evaluating a measurement signal (5') emanating from an NV quantum system (4), comprising exciting the NV quantum system (4) by a pulsed excitation light (13; 320) to bring the NV quantum system (4) into the spin state |m s = 0> to initialize, excitation of the NV quantum system (4) by an alternating magnetic field (3; 310) which alternately has two different field states, wherein the NV quantum system (4) is brought into the spin state |m by an alternating magnetic field (3; 310) which has the first of the two field states. s = +1> can be converted, and by an alternating magnetic field (3; 310), which has the second of the two field states, into the spin state |m s= -1> can be converted, a detection of the measurement signal (5') emanating from the NV quantum system (4), an integration of the measurement signal (5') over an integration window (331) containing a signal time of a first light pulse (322) in order to obtain a signal value, an integration of the measurement signal (5') over an integration window (332) containing a signal time of a second light pulse (322) in order to obtain a reference value, wherein the first and the second light pulse are two time-displaced light pulses of the excitation light (13; 320), wherein the first light pulse (322) is generated after the alternating magnetic field (3; 310) which has the first of the two field states, and wherein the second light pulse (322) is generated after the alternating magnetic field (3; 310) which has the second of the two field states, and a determination of a measured value from the signal value and the reference value.

An NMR-DNP probe head comprises a probe holder for receiving a sample vessel containing a sample substance surrounded by an RF coil, a temperature control device for maintaining the temperature of the sample substance, a microwave guide for supplying microwave radiation into the sample volume, and an illumination device comprising an optical fiber for photoinduced electron excitation of the sample substance in the sample volume. The temperature control device comprises a VT channel through which temperature control fluid can be supplied to the sample vessel during NMR measurement to maintain the temperature of the sample substance, the sample-side end of the optical fiber is arranged in the VT channel, and a deflecting mirror is arranged in the VT channel between the sample-side end of the optical fiber and the sample vessel that directs light exiting the optical fiber onto the sample substance in the sample volume of the sample vessel.

The invention relates to an optically pumped quantum sensor (100) for measuring magnetic fields, comprising a spin-based sensor medium (110), an excitation light source (120) for illuminating light (124) into the sensor medium (110), a current source (121) for supplying the excitation light source (120), a magnetic field generating device (140) for generating a static magnetic field (B0), wherein the magnetic field generating device (140) comprises an electromagnet (141), and a current distribution circuit (200) configured to direct a portion of the current generated by the current source (121) to the magnetic field generating device (140).