65 results about "Atomic density" patented technology

The invention provides a method for measuring alkali metal atomic polarizability of a nuclear magnetic resonance gyro in real time and belongs to the field of atomic physics. The method includes: measuring alkali metal atomic densities of an atomic pool at different temperatures, measuring atomic nuclear magnetic resonance frequency of inert gas caused by polarization of alkali metal atoms, and thus acquiring polarizability of the alkali metal atoms in the atomic pool without changing the optical path structure of the nuclear magnetic resonance gyro and the magnetic field environment; building a three-dimensional model of changes in nuclear magnetic resonance frequency of the inert gas in the atomic pool along with temperature and the alkali metal atomic polarizability, measuring the frequency shift of atomic NMR (nuclear magnetic resonance) of the inert gas at any temperature point while the nuclear magnetic resonance frequency normally runs, and thus calculating the polarizability of the alkali metal atoms in the atomic pool in real time. The method has the advantages that the method is simple, no influence is caused to the optical path structure of the nuclear magnetic resonance gyro and the method is of great significance to improving the performance of the nuclear magnetic resonance gyro.

The invention discloses an integrated measurement device for atomic density and polarizability of alkali metal vapor. The device comprises a drive laser subsystem, a measuring and sensing unit subsystem and a detection unit subsystem, wherein the measuring and sensing unit subsystem has the function of providing a physical carrier and testing conditions for measurement of density and polarizability; the drive laser subsystem has the function of polarizing alkali metal atoms in an air chamber; and the detection unit subsystem has the functions of measuring a deflection angle of detection light under different testing conditions and calculating the deflection angle to obtain the atomic density and polarizability. According to the device, pumping light is generated to irradiate the air chamber by utilizing the drive laser subsystem, a fixed magnetic field is applied to generate a Faraday rotating angle in the measuring and sensing unit subsystem, the deflection angle of the detection light is measured by utilizing the detection unit subsystem, and finally the atomic density and polarizability are calculated through a data processor. The device has the characteristics of simple measurement system and high measurement accuracy and has important significance for improving the inertia of atoms and the magnetic field measurement sensitivity.

A complementary semiconductor device includes a semiconductor substrate, a first semiconductor region formed on a surface of the semiconductor substrate, a second semiconductor region formed on the surface of the semiconductor substrate apart from the first semiconductor region, an n-MIS transistor having a first gate insulating film including La and Al, formed on the first semiconductor region, and a first gate electrode formed on the gate insulating film, and a p-MIS transistor having a second gate insulating film including La and Al, formed on the second semiconductor region, and a second gate electrode formed on the gate insulating film, an atomic density ratio Al/La in the second gate insulating film being larger than an atomic density ratio Al/La in the first gate insulating film.

The invention relates to a fullerene molecular gyroscope which is characterized in that: atoms or molecules are embedded in the fullerene, so as to prevent spin collision exchange relaxation and spin collision damage. The micro-crystallizing standard solid molding is adopted, so that the fullerene molecules are arrayed according to a certain structure and the sensitive atomic density is increased. An optical and microwave method is adopted for controlling and detecting the atomic energy level, so that the detection for a dead axle and an inertia signal of the atoms or molecules in an inertia space is realized. The fullerene molecular gyroscope has the advantages of high sensitivity and excellent heat stability and has an important value for developing a new generation solid gyroscope based on an atomic spin effect and with high precision, high stability and small volume.

The invention discloses a pressure-broadening-based alkali metal stream atomic density measuring method, relating to an alkali metal atomicity density measuring method. The method comprises the following steps of: firstly, producing an alkali metal air chamber filled with positive pressure gas and uniformly heating; secondly, radiating the air chamber by utilizing stable-powder laser and carrying out frequency sweeping so as to measure an absorption curve of the alkali metal, and carrying out negative logarithm taking processing to obtain an optical depth curve; finally, carrying out lorentz nonlinear fitting on the obtained data, acquiring the overall width of a half peak value of a lorentz curve, thus obtaining pressure broadening parameters and further obtaining the air pressure of the filled gas; obtaining the atomicity density of alkali metal steam according to a peak value of the lorentz curve, thereby realizing the measurement of the atomic density and gas pressure intensity of the alkali metal air chamber.

The invention relates to a variable cross-section channel structure of a low-power cusp magnetic field plasma thruster, which relates to the field of cusp magnetic field plasma thrusters. The present invention aims to solve the problem that under the low power working condition of the existing tangential magnetic field plasma thruster, the insufficient ionization leads to performance degradation when the current density is low, and the performance degradation is also caused by the intensified interaction between the plasma and the wall surface when the current density is high. The problem. The channel is constructed by a ceramic channel and a permanent magnet. The ceramic channel is a one-piece structure, which is divided into two sections: the upstream part of the channel and the downstream part of the channel. The channel structure gradually expands from the upstream part of the channel to the downstream part of the channel. The outer wall of the ceramic channel is used for To achieve clearance fit with the inner wall of the permanent magnet. This structure increases the atomic density and ionization rate in the upstream ionization area, and at the same time reduces the interaction with the channel wall during the accelerated ejection of ions generated by ionization, prolonging the life of the thruster. It is used in the low power working condition of the tangent magnetic field plasma thruster.

The invention relates to a detection device and method for the metal steam atomic density of microstructure alkali metal gas chambers, and relates to the technical field of detection of microstructure alkali metal gas chambers. The detection device and method for the metal steam atomic density of the microstructure alkali metal gas chambers solve the problems that an existing alkali metal gas chamber detection device can only detect the gas chambers one by one, consequently, much time is consumed for light path modulation, the detection cost is high, and the consistency of detection of all gas chamber units cannot be ensured. The microstructure alkali metal gas chambers and a photoelectric tube array have similarities, light beams transmitted out of the gas chambers are focused by convex lenses and then are transmitted to corresponding photoelectric tubes respectively, a collecting signal processing circuit is used for comparing and analyzing detection signals and detection signals of a standard gas chamber, and finally detection of the metal steam atomic density of all the gas chamber units is achieved. The detection device and method for the metal steam atomic density of the microstructure alkali metal gas chambers are suitable for detection of chip atomic clocks, microstructure atomic magnetometers, minitype atomic spinning tops and other microstructure devices, and especially suitable for detection of imaging systems with the wafer-level microstructure alkali metal gas chambers as magnetic array imaging sensing units.

An object of the present invention is to provide a method of effectively producing a nano-particle and a nano-wire, and others.

Specifically, the present invention provides a method of producing a molecular device including: the use of a molecular structure having a higher atomic density in the periphery than in the interior and bonding residues in the periphery; and a step of crosslinking the bonding residues, and the method of producing a molecular device according to claim 1, characterized in that the molecular structure is constituted by a skeleton portion having a skeleton structure, and a terminal portion which is arranged in the outer shell of the skeleton portion, has a higher atomic density than that of the skeleton portion and has bonding residues; and that in the step of crosslinking the bonding residues, the bonding residues in the terminal portion of the molecular structure are crosslinked to form the molecular structure into a shell structure, and others.

The invention provides a cylindrical microwave cavity of a diffuse reflection laser cooling atom, wherein the cylindrical microwave cavity is applied to a miniaturized space cold atomic clock. The cylindrical microwave cavity is formed by connecting an upper cover and a lower base through screws. The cylindrical microwave cavity is utilized to achieve the effects of the cooling atom and a microwave resonant cavity, has the advantages that a central zone of the cooling atom of a cylindrical cavity is high in cold atomic density and the cylindrical resonant cavity is high in quality factor and easy to machine, can simplify the structure of the cold atomic clock greatly, reduces the weight of the atomic clock, and improves the signal to noise ratio of clock signals and system stability.

An image-forming method is provided which enable high-quality images to be formed over a long time period. In the image-forming method, an electrophotographic photosensitive member is used having a surface layer formed of a hydrogenated amorphous silicon carbide in which a ratio of the number of carbon atoms to the sum of the number of silicon atoms and the number of the carbon atoms in the surface layer is 0.61 or more and 0.75 or less, and the sum of the atomic density of the silicon atoms and the atomic density of the carbon atoms in the surface layer is 6.60×10²² atoms/cm³ or more, and the peak wavelength of pre-exposure light is shorter than the peak wavelength of image exposure light.

The invention discloses a single-beam mixed light pumping system and a background light intensity suppression method thereof. The method can greatly improve the atomic density, enhance the signal intensity, and increase the atomic density through the fast spin exchange collision between different alkali metal atoms through a mixed light pumping technology, thereby improving the sensitivity of a magnetometer, reducing the bias of a detection signal at the same time, improving the sensitivity of the atom magnetometer, and having wide application scenes in the biomedical fields such as heart-brain magnetism.

The invention relates to a hybrid optical pumping-based accurate atomic density measurement method. The method comprises the steps of heating an alkali metal gas chamber filled with K and Rb up to starting temperature, and measuring to obtain laser absorption spectrums of the K and the Rb to obtain densities of the K and the Rb at the starting temperature, and associating Raoult's law to obtain the starting temperature as well as ratios of saturated vapor pressures to molar fractions of the K and the Rb at the starting temperature; heating the gas chamber up to working temperature, wherein the density of the Rb is very high and the absorption is very strong near a resonance point in an SERF state, carrying out curve fitting to obtain a greater deviation of the density of the Rb, and accordingly obtaining the density of the K by means of a spectral absorbing method; combining the known molar fraction of the K, and calculating to obtain the working temperature; combining the molar fraction of the Rb to obtain the saturated vapor pressure of the Rb at the working temperature, and further obtaining the density of the Rb at the working temperature. The hybrid optical pumping-based accurate atomic density measurement method is suitable for the situation that during hybrid optical pumping, the saturation absorption spectrum is very high in atomic number density and is very strong in absorption at the both sides of a resonant peak, so that the density is difficult to obtain by means of a fitted curve.

The invention provides a differential absorption method-based atomic density and population measuring device and method. According to the differential absorption method-based atomic density and population measuring device and method of the invention, two pulse light sources are adopted, wherein one of the pulse light source serves as signal light, and the other pulse light source serves as opticalpumping light; after the two beams of light are combined, the combined light is transmitted along two light paths, wherein one of the two light paths is provided with an atomic pool and serves as a signal light path, and the other light path is not provided with any atomic pool and serves as a calibration light path of absorption spectral lines; after the two paths of light are converted into electric signals through a detector, the two paths of electric signals are subtracted from each other; and therefore, influence in the absorption spectral lines which is caused by the instability of thelight paths and the light sources can be removed, and measurement accuracy is improved. Atomic density at each energy level is determined through each fine absorption peak of the absorption spectral lines, and therefore, the blank of the population measurement of each atomic level can be filled. The method can be further used for measuring the initial states of atoms prepared by optical pumping.

An atomic reflection optical element for an atomic wave (de Broglie wave) so constituted as to increase the reflectance of an atomic wave by reducing the apparent atomic density of reflection plane; for example, a porous surface structure, a structure supporting a very thin film, or a structure in which the insular portion (reflection surface) of a reflection-diffraction grating is narrowed is used for this purpose. The above arrangement can provide an atomic reflection optical element having a high atomic wave coherent reflection power.

The invention relates to a preparation method of high-defect nanowires NiO and photocatalytic application of the NiO nanowires. The method is mainly characterized in that nickel acetate, N,N-dimethylformamide and polyvinylpyrrolidone used as precursors are subjected to a simple electrostatic spinning process to synthesize lots of one-dimensional composite nanowires on an aluminum foil. After a non-equilibrium calcination process, abundant steps, knots and other surface defects are generated on the NiO nanowire surface due to the escape of gas phases, generation of pores and holes and the like, and the surface energy is lowered, so that the high-energy surface of the NiO can be preserved, thereby greatly enhancing the catalytic efficiency. The atomic density of the exposed high-energy surface is defined and quantitatively calculated to enhance the photocatalytic efficiency in a controllable way, thereby providing the direction for the subsequent catalysis research.