9 results about "Charge exchange" patented technology

The invention specifically discloses an ion thruster acceleration grid probability life evaluation method based on coupling competitive failure, and relates to the technical field of aerospace propulsion system life evaluation. The method comprises the following steps: firstly, obtaining deterministic parameters and random parameters of a thruster acceleration grid assembly; then based on an ion sputtering corrosion theory, considering material loss caused by charge exchange ion bombardment of the acceleration gate, and establishing a coupling corrosion model of the thickness and aperture of the acceleration gate; thirdly, constructing a competitive failure model, and realizing numerical solution of competitive failure life by dynamically iterating a corrosion state and a failure criterion; and finally, independently repeated random sampling is carried out based on probability distribution of random parameters, the random sampling is substituted into the competitive failure model to obtain an acceleration grid simulation life sample set, and statistical analysis is carried out on the life sample set to obtain a probability life evaluation result. The method solves the problem of errors caused by independent modeling of structural failure and electronic reflux failure in the prior art, and is helpful for reducing the system operation risk and improving the reliability of a spacecraft.

The invention discloses a laser ion source system based on double pulses and AI feedback control and a control method, and relates to the technical field of plasmas, and the system is characterized in that a first laser generates pre-ablation laser, and generates pre-plasma on a target material; the second laser generates main ionization laser which irradiates the pre-plasma to generate main plasma; and the intelligent control unit extracts spatial features from the plume image, fuses the spatial features, the spectral data, the real-time ion current intensity and the equipment parameters to obtain high-order state features, and generates laser pulse optimization parameters according to the high-order state features and the equipment parameters. According to the invention, a double-pulse mechanism is adopted to enable main ionization to occur in the expanded plasma, charge exchange and energy dispersion are reduced, the energy divergence of the ion beam is remarkably reduced, the energy conversion efficiency is improved, AI real-time feedback control can compensate factors such as target pitting corrosion and laser power fluctuation, and very high inter-pulse stability is realized.

The invention belongs to the technical field of motors, and particularly relates to a rotary exposed electrostatic motor with an embedded stator and an aircraft, the rotary exposed electrostatic motor comprises a stator module, a rotor module, a bearing assembly, a charge transfer assembly and a power supply assembly, the stator module is embedded in the inner side of a bearing, and the rotor module sleeves the outer side and is partially exposed; the rotor blades can directly drive an external load to rotate, the power supply assembly enables the adjacent stator blades to be electrified alternately to form a driving electric field, and the charge transfer assembly achieves charge exchange during rotation so as to drive the rotor module to rotate. According to the structure, direct output of energy is achieved through the layout that the stator is embedded and the rotor is exposed, mechanical transmission loss is reduced, energy conversion efficiency is improved, and when the structure is applied to an aircraft, a motor can directly drive a propeller to generate thrust, the gravity center of the aircraft is lowered, and attitude stability and propelling efficiency are improved.

This application provides a high-acceptance gas charge stripper for a gas target, the main body of which is a vacuum differential structure. The stripping gas enters the stripping tube from the inlet pipe, and the charged particle beam achieves charge stripping through collision reactions as it passes through the stripping tube. Gas resistance tubes are installed at both ends of the stripping tube to restrict the stripping gas from entering the vacuum pipes at both ends of the vacuum chamber. The inner wall of the stripping tube has a variable aperture structure, with the aperture gradually increasing from the center to both ends, thereby achieving efficient charge exchange. The inner wall of the gas resistance tube also has a variable aperture structure, with the aperture gradually decreasing from inside the vacuum chamber to outside, thereby reducing the impact of the stripping gas on the vacuum level in the vacuum pipes on both sides. By setting the variable-diameter gas resistance tubes, the vacuum system can withstand a higher intake volume of stripping gas, allowing the aperture of the stripping tube to be designed to be larger, thus improving the beam acceptance of the gas charge stripper, increasing beam transmission efficiency, and ensuring the efficient and stable operation of the electrostatic tandem accelerator.

The invention discloses an ion thruster acceleration gate downstream pit-groove corrosion morphology prediction method, which comprises the following steps: establishing a computational domain, and determining boundary conditions of the computational domain; ions are injected from the left boundary of the computational domain, charges carried by all the ions are mapped to grid nodes of the computational domain through a weight distribution method, and space charge density distribution is obtained; solving three-dimensional potential distribution and three-dimensional electric field distribution in a computational domain based on space charge density distribution and set boundary conditions; pushing the ions to move based on the three-dimensional electric field distribution, and updating the positions and speeds of all the ions; simulating a charge exchange collision process of ions and neutral atoms based on the updated ion position and speed, and updating the state of the collided ions; counting information of charge exchange ions impacting the downstream surface of the acceleration gate within a set time; and calculating the three-dimensional corrosion morphology of the downstream surface of the acceleration gate based on charge exchange ion information in combination with a sputtering yield model and gate material attributes.

The invention belongs to the technical field of motors, and particularly relates to a mute and efficient microwave oven stirring blade direct drive motor and a directional self-starting method.The mute and efficient microwave oven stirring blade direct drive motor comprises a frame assembly, a stator disc, a charge exchange cylinder, a rotor disc, a rotating shaft and stirring blades; positive and negative electrode exchange electrodes are arranged on the outer side of the circumference of the charge exchange cylinder, a plurality of electrode plates are arranged on the rotor disc in the radial direction, tail parts are arranged at the tail ends of the electrode plates to achieve directional self-starting, and the rotor disc and the stator disc are alternately stacked and arranged and drive the stirring blades to rotate through the rotating shaft. The static motor is used for directly driving the low-speed light load, stable low-speed output can be achieved without a speed reducer, the operation power consumption is lower than 20 milliwatts, the energy efficiency is high, the driving process is almost noiseless, meanwhile, the current is automatically reduced to be close to zero in the locked-rotor process, motor damage is avoided, the overall structure is compact and reliable, and the device is suitable for efficient mute driving of the microwave oven stirring blade.

The application belongs to the field of environmental functional materials and detection technology, and discloses a hydrophilic anion chromatographic column based on mixed mode separation and a preparation method and application in the field of detection thereof. The application takes styrene-divinylbenzene microspheres as a chromatographic column matrix, adopts sulfonation and amination to endow the microspheres with hydrophilic properties, and controls the ion selectivity of the stationary phase through hyperbranched reaction. The application adopts microwave heating to alternately modify the epoxy bond and the polyamine bond of the sulfonated microspheres, and terminates with methylamine to prepare a hydrophilic anion chromatographic stationary phase, and press the hydrophilic anion chromatographic stationary phase into a chromatographic column, and apply the chromatographic column to common ions in a detection sample. Due to the introduction of rich hydroxyl groups by hyperbranched modification and the formation of regular dendritic structures by alternating reaction, under the mixed modes of hydrophilic interaction, network structure and charge exchange, the ion chromatographic column of the application has a shorter retention time of high-valence state ions such as SO4 2‑ , PO4 3‑ than that of low-valence state ions when detecting common anions.

The application discloses a kind of carbon positive ion mass spectrometer device based on C + Ion is carried out 14 C analysis method belongs to the technical field of nuclide analysis.The method comprises the following steps: eliminating C-H molecular ion interference by stripping target using specific gas through the way of sectional stripping and charge exchange, then forming C ‑ Ion by charge exchange target of non-metal gas, cooperating with pre-focusing, post-focusing and magnet analysis, to obtain high-intensity C ‑ Ion current intensity;C + Ion current intensity reaches 6-7 mA, C ‑ Ion current intensity after charge exchange reaches 260 μA; the specific gas is any one or more of He gas, Ar gas and N2 gas, and the non-metal gas is any one or more of H2, CH4, C2H4 and C4H 10 . In the application, the C + Ion current intensity generated by ion source is several times higher than that of C 2+ , and the efficiency of generating C + by charge exchange using C 2+ and C ‑ is close, so the efficiency of C + analysis based on C 14 can be several times higher than that of using C 2+ .

The present application relates to a kind of printing and dyeing sludge biological treatment photovoltaic cell drive near-infrared targeted drying method and device, the present application is directed to the characteristics of active organic matter, inert organic matter, heavy metal etc. in sludge, the light initiator with strong near-infrared light absorption capacity, stable chemical properties, low price is introduced into the printing and dyeing sludge after biological pretreatment, the organic matter often on the surface of nano particle and macromolecular solid organic matter in sludge can be closely combined, when these nano particles are irradiated by near-infrared light, its surface will occur plasmonic resonance phenomenon, leading to strong electric field and heat generation, so that near-infrared energy is efficiently focused around target material, near-infrared targeted heating drying is realized, and sludge treatment rate is significantly improved. Metal nanoparticles interact with bacterial cells by charge, destroy their membranes and walls, destroy charge exchange, interfere with ribosome assembly and enzyme activity, achieve the effect of sterilization and disinfection.