Disclosed is an in-situ vacuum reaction system for dynamically detecting defects, which includes an electron paramagnetic resonance spectrometer, an in-situ vacuum reaction chamber, a gas supply unit, a vacuum unit, an illumination unit, a temperature control unit and a mixing bottle, the in-situ vacuum reaction chamber is arranged inside a detection cavity of the electron paramagnetic resonance spectrometer, the gas supply unit is connected to the mixing bottle through a pipeline, and the mixing bottle is connected to a gas inlet of the in-situ vacuum reaction chamber through a pipeline, the vacuum unit is connected to the gas inlet of the in-situ vacuum reaction chamber through a pipeline, the illumination unit is arranged corresponding to a detachable window of the electron paramagnetic resonance spectrometer, and the temperature control unit is connected to the electron paramagnetic resonance spectrometer through a pipeline.

Disclosed is an in-situ vacuum reaction system for dynamically detecting defects, which includes an electron paramagnetic resonance spectrometer, an in-situ vacuum reaction chamber, a gas supply unit, a vacuum unit, an illumination unit, a temperature control unit and a mixing bottle, the in-situ vacuum reaction chamber is arranged inside a detection cavity of the electron paramagnetic resonance spectrometer, the gas supply unit is connected to the mixing bottle through a pipeline, and the mixing bottle is connected to a gas inlet of the in-situ vacuum reaction chamber through a pipeline, the vacuum unit is connected to the gas inlet of the in-situ vacuum reaction chamber through a pipeline, the illumination unit is arranged corresponding to a detachable window of the electron paramagnetic resonance spectrometer, and the temperature control unit is connected to the electron paramagnetic resonance spectrometer through a pipeline.

A magnetic resonance member 1 includes a crystal structure and is capable of electron spin quantum operations with microwaves of different frequencies corresponding to arrangement orientations of a vacancy and an impurity in a crystal lattice. A magnetic field transmission unit 4 senses a measurement target magnetic field at plural measurement positions different from each other, and applies application magnetic fields corresponding to the measurement target magnetic field sensed at the plural measurement positions to the magnetic resonance member 1 along respective different directions corresponding to the aforementioned arrangement orientations. A measurement control unit 21 controls a high frequency power supply 12, and determines detection values detected by a detecting device (an irradiating device 5 and a light receiving device 6) of the physical phenomena corresponding to the plural measurement positions. A calculation unit 22 calculates the measurement target magnetic field at the plural measurement positions on the basis of the detection values.

The invention pertains to advances in real-time methods in nuclear magnetic resonance by offering a new dual-frequency dynamic nuclear polarization (DNP) method that uses a microwave beam to polarize the spins of electrons and concomitantly act as a NMR transmitter.

The invention pertains to advances in real-time methods in nuclear magnetic resonance by offering a new dual-frequency dynamic nuclear polarization (DNP) method that uses a microwave beam to polarize the spins of electrons and concomitantly act as a NMR transmitter.

A dendrimer including a ring core moiety, a paramagnetic group, a linking moiety and a branching moiety for continuously probing and quantifying an analyte is provided together with methods, kits and devices for performing sensitive, accurate and durable measurements.

A dendrimer including a ring core moiety, a paramagnetic group, a linking moiety and a branching moiety for continuously probing and quantifying an analyte is provided together with methods, kits and devices for performing sensitive, accurate and durable measurements.

A microwave bridge circuit routes a transmission signal from a transmitter to a resonator and forwards the reception signal generated in the resonator to a receiver. It includes two electrical lines connected in parallel at a first circuit point TX, where the transmission signal is divided. The first electrical line has an attenuator for attenuating a first transmission signal portion. The second electrical line carries a second transmission signal portion and connects to the resonator at a second circuit point R, which divides it between section L1, which runs from TX to R, and section L2, which runs from R to a third circuit point RX. The length of the sections L1 and L2 corresponds to an odd integer multiple of one quarter of the wavelength of the transmission signal, and the divided transmission signal portions are combined at RX, where the reception signal is forwarded to the receiver.

The invention relates to a sample cell for performing DNP-NMR measurements, for interchangeable use in an EPR microwave resonator, with the sample cell comprising a flat sample cavity for holding a liquid sample to be measured, wherein the flat sample cavity extends with a maximum length L and a maximum width W in a sample cavity plane, and extends with a maximum height H perpendicular to the sample cavity plane, with H≤ 1/15*L and H≤ 1/15*W, and an NMR coil wound around the flat sample cavity for generating an RF magnetic field B.sub.2, wherein a coil axis of the NMR coil about which the NMR coil is wound is oriented perpendicular to the sample cavity plane. The invention provides a sample cell which is easy to handle and improves the quality and the reproducibility of DNP-NMR measurements.

The invention relates to a sample cell for performing DNP-NMR measurements, for interchangeable use in an EPR microwave resonator, with the sample cell comprising a flat sample cavity for holding a liquid sample to be measured, wherein the flat sample cavity extends with a maximum length L and a maximum width W in a sample cavity plane, and extends with a maximum height H perpendicular to the sample cavity plane, with H≤ 1/15*L and H≤ 1/15*W, and an NMR coil wound around the flat sample cavity for generating an RF magnetic field B.sub.2, wherein a coil axis of the NMR coil about which the NMR coil is wound is oriented perpendicular to the sample cavity plane. The invention provides a sample cell which is easy to handle and improves the quality and the reproducibility of DNP-NMR measurements.