16 results about "Ion density" patented technology

The application provides an ion beam forming module for flat glass, an ion implantation system and a method, wherein the ion beam forming module for flat glass comprises ion source combination units, ion beam mass and charge ratio analysis magnetic field units, expansion magnet combination units and collimating magnet combination units which are sequentially connected; the ion source combination units comprise a plurality of ion source devices arranged side by side, and the input end of the ion source device is connected with an energy supply and material supply device; the expansion magnet combination units comprise a plurality of groups of expansion magnets, and the position of each group of expansion magnets corresponds to the two sides of the ion beam generated by one ion source device; the collimating magnet combination units are located at the intersection of a plurality of ion beams generated by the plurality of ion source devices after deflection by the ion beam mass and charge ratio analysis magnetic field units. The parallel strip-shaped ion beam obtained by the scheme has a very high effective height, and the beam width of the ion beam is small, the ion density is high and the uniformity is good.

The invention discloses an ion mobility spectrum measurement method based on an I-U characteristic curve of a single-section Gedes tube, and the method comprises the steps: building a measurement platform, and enabling to-be-measured ions to pass through the single-section Gedes tube under the driving of laminar airflow with the flow velocity of u0; changing a bias voltage U applied to the single-section type Gedes tube, and measuring a corresponding corona ion current I to obtain an I-U characteristic curve of the single-section type Gedes tube; on the basis of the curve slope of the I-U characteristic curve, calculating ion densities corresponding to ions with different migration rates; and generating an ion mobility spectrum according to all the ions with different mobility and the corresponding ion densities, and calculating the average ion mobility based on the ion mobility spectrum.

The application discloses a kind of particle evolution simulation methods based on multi-component plasma radiation effect in tokamak, belong to magnetic confinement controlled nuclear fusion technical field.Firstly, the evolution of impurity density distribution, electron density distribution and ion density distribution is calculated, then continuous radiation and linear radiation are calculated, and then a variety of plasma radiation is accurately added inside magnetic island.Calculating the magnetic field configuration under the plasma radiation correction, and continue to calculate the evolution of plasma total radiation and related parameters under advanced magnetic field configuration, so repeated calculation, achieve the simulation effect of long time evolution.The application realizes the calculation of impurity, electron and ion real-time dynamic distribution, and can also calculate the evolution of a variety of plasma radiation under real three-dimensional magnetic field configuration, and then obtain the plasma related parameter profile at any time;Meanwhile, the spatial distribution of plasma radiation and the situation of magnetohydrodynamic instability under advanced magnetic field configuration are more accurately described.

This invention discloses a gas supply system for a miniature radio frequency ion thruster, belonging to the field of electric propulsion technology, and relating to rarefied gas flow in plasma propulsion. By placing a gas distribution structure at the working fluid inlet in the ionization chamber and arranging the disc of the gas distribution structure coaxially with the ionization chamber, the propellant entering the ionization chamber is uniformly distributed after passing through the gas distribution structure, increasing the average density of the propellant in the ionization chamber. This results in higher absorption efficiency of radio frequency energy by the miniature radio frequency ion thruster, more uniform plasma distribution, and higher ion density in the plume, significantly improving the performance and operational stability of the miniature radio frequency ion thruster. Furthermore, the gas distribution structure is simple, with both the disc and cylinder being cylindrical, reducing manufacturing difficulty and increasing economic efficiency compared to existing technologies. The gas supply system for the miniature radio frequency ion thruster of this invention solves the problems of complex structure and low propellant density in existing gas supply structures.

The application provides a target material support and relates to the technical field of coating equipment. The target material on the target material base is aligned with the ion source by rotating the steering part connected with the steering shaft part and driving the steering support by the steering shaft part. During the process of bombarding the target material on the target material base by the ion source, the lifting assembly on the target material base performs lifting with a lifting distance less than 1 cm, drives the target material base to lift with a lifting distance less than 1 cm, and makes the ion beam always keep at 90 degrees in the beam path between the ion source, the target material on the target material base and the workpiece disc above the target material. The ion density in the middle of the high-energy ion beam is large, the ion density in the outer periphery is small, the target material is not in the form of annular depression after continuous sputtering under the kinetic energy bombardment, the target material surface is no longer a flat structure, and the phenomenon of uneven deposition of target material atoms in the sputtering process is avoided, so that the coating of the workpiece and the substrate surface is uniform.

The present invention relates to the field of controlled nuclear fusion in nuclear energy applications. The title of the present invention is a positive-ion circular-collision nuclear fusion reactor. The technical problems to be solved by the present invention are: the nuclear fusion reaction times are short and the energy gains Q are less than 1. Our technical solution is: using an accelerator to accelerate hydrogen isotope positive ions to (0.1-3) Mev, and then inducing nuclear fusion reactions by circular collision. In the past, it was believed that the probability of inducing nuclear fusion by collision was less than 0.0001. We simultaneously employ five technical schemes to solve the problem of low probabilities of positive ion collision-induced nuclear reactions: 1. using the accelerator to accelerate the positive ions to (0.1-3) Mev; 2. using circular collision to induce nuclear fusion; 3. enabling collision in a collision area having a large cross section; 4. enabling collision in a long collision area; and 5. using a plurality of sets of electromagnetic lenses to focus ion beams to increase the ion density. In the present invention, energy generated by nuclear fusion is converted into heat energy in an energy conversion area, and then high-pressure steam is generated for power generation.

This invention provides a two-dimensional triangular lattice rare-earth-based titanate polycrystalline material, its preparation method, and its applications. The chemical formula of the rare-earth-based titanate polycrystalline material is Ba6M2Ti4O. 17 The space group is P63 / mmc, where M is one or more of Nd, Gd, and Yb. The novel two-dimensional triangular lattice rare-earth-based titanate polycrystalline material provided by this invention has a compact structure, a simple preparation process, and its frustrated structure of localized electron spins significantly reduces the minimum cooling temperature to the tens of millikons. Furthermore, it exhibits high magnetic ion density and large cooling capacity, making it an excellent magnetic refrigerant.

This application relates to the field of space electric propulsion technology, specifically to a method for establishing a variable boundary simulation model of an ion thruster gate assembly. The method includes: Step 1: dividing the gate into regions; Step 2: selecting the object to be studied within each region; Step 3: calculating the upstream ion density of each object; Step 4: calculating the corresponding Debye length and determining the maximum values ​​of the calculation region in the lateral and radial directions; Step 5: handling collisions between atoms; Step 6: establishing a simulation calculation model; Step 7: calculating the gate morphology; Step 8: correcting the gate simulation calculation model; and Step 9: completing the establishment of the variable boundary simulation model of the ion thruster gate assembly. This application utilizes the sputtering etching morphology obtained from simulation calculations to update and improve the simulation calculation model in real time, enabling more accurate prediction of the thruster's operational lifespan, significantly shortening the product development cycle and reducing development costs.

The invention provides a subKelvin magnetic refrigeration material as well as a preparation method and application thereof. The chemical formula of the sub-Kelvin magnetic refrigeration material is LiSrRE2 (BO3) 3, and RE represents a rare earth element. A series of sub-Kelvin magnetic refrigeration materials LiSrRE2 (BO3) 3 provided by the invention have a magnetic hexamer structure, the combination of high magnetic ion density and extremely low magnetic sequence temperature is realized, and experiments prove that the materials show ultralow adiabatic demagnetization refrigeration temperature, can be applied to the sub-Kelvin field, and have the characteristics of easiness in synthesis, stable performance, low cost and the like. The magnetic refrigeration working medium can be used as a magnetic refrigeration working medium with a novel geometric anti-contusion structure, so that the magnetic refrigeration working medium is suitable for wider application scenes.

The present invention belongs to the field of controlled nuclear fusion under civil nuclear energy. Provided is a positive ion cyclic collision nuclear fusion reactor. The technical problems to be solved by the present invention are: the nuclear fusion reaction time being short and the energy gain Q being less than 1. The technical solution is to use an accelerator to accelerate hydrogen isotope positive ions to 0.03-3 Mev, and then perform cyclic collision to induce a nuclear fusion reaction. In the past, it was believed that the probability of producing nuclear fusion by means of collision was less than 0.0001, and thus this approach was not used. Here, five technical solutions are used at the same time to solve the problem of the probability of collision-induced nuclear fusion being low: 1, using an accelerator to accelerate positive ions to 0.03-3 Mev; 2, inducing nuclear fusion by means of cyclic collision; 3, performing collision in a collision region with a large cross section; 4, performing collision in a long collision region; and 5, using an electromagnetic lens to focus an ion beam to increase the ion density. In the present invention, energy generated by nuclear fusion is converted into thermal energy in an energy conversion region, and then high-pressure steam is generated for power generation.

The invention relates to the technical field of simulation modeling of power equipment, in particular to an equivalent circuit modeling and parameter calculation method for a sheath stage after arc of a vacuum circuit breaker. The invention provides a technical path for extracting instantaneous microcosmic parameters through PIC-MCC simulation and calculating time-varying circuit parameters in real time according to the instantaneous microcosmic parameters. Therefore, the equivalent circuit model is not a static'black box 'any more, but is a'transparent model' capable of accurately reproducing a post-arc complex dynamic process, and the problem that a traditional model is insufficient in precision is fundamentally solved. According to the method, a direct and computable mathematical relationship is established between the microscopic ion density and speed and the macroscopic circuit parameter conductance and capacitance, the physical image is clear, and the theoretical preciseness and engineering interpretation of the model are greatly enhanced. Through sufficient experimental verification, the reliability and practicability of the method and the model thereof are powerfully proved, and a solid foundation is laid for direct application of the method and the model thereof to product research and development.

The application relates to a magnetic confinement fusion plasma temperature diagnosis method, device and equipment, wherein the method comprises the following steps: establishing a neutron yield database, including a thermonuclear fusion neutron yield database and a beam-target reaction neutron yield database; collecting ion density and total neutron yield of external experimental equipment; assuming that only beam-target reaction exists in an initial stage, obtaining an initial temperature estimation value based on the ion density and the total neutron yield; obtaining first neutron yield and second neutron yield based on the initial temperature estimation value and the ion density, and obtaining theoretical total neutron yield; comparing the difference between the total neutron yield and the theoretical total neutron yield until convergence, obtaining the temperature estimation value as the plasma temperature; and outputting a diagnosis result as an initial temperature of the next moment to realize time sequence evolution analysis. The scheme fully utilizes the thermonuclear fusion and beam-target reaction database, effectively distinguishes the contributions of the two types of reactions to the neutron yield, and avoids the limitations of a traditional single reaction model.

The invention belongs to the field of magnetic confinement controlled nuclear fusion, and discloses a numerical calculation method and system for phase space distribution function evolution of helium ions in magnetic confinement deuterium-tritium fusion, and the method comprises the steps: carrying out the numerical stability verification based on a self-adaptive CFL condition, and determining a proper step size value, carrying out discretization processing on the input data by utilizing a multi-dimensional grid; establishing a Fokker-Planck equation containing friction, energy diffusion, position space transport and helium ion generation source items, and converting the Fokker-Planck equation into a difference format capable of being solved in a recursive manner through a finite difference method; in the calculation process, a corresponding boundary condition is set in combination with physical reality, a difference format of a boundary area is corrected, self-consistent updating is carried out on the main ion density based on a quasi-neutral condition, and information of evolution of a helium ion phase space distribution function along with time is obtained; and introducing an energy boundary judgment method related to the equivalent temperature of helium ash, distinguishing the helium ash from high-energy particles, and outputting a result of evolution of density profiles of the helium ash and the high-energy particles along with time.

A method of plasma processing includes generating plasma by coupling a source power pulse to a plasma processing chamber containing a substrate holder configured to support a substrate. The plasma includes first ions having a first mass and second ions having a second mass greater than the first mass. The ion density ratio of the second ions to the first ions is a first ratio. The method further includes delivering an energetic ion flux of second ions to the substrate by applying a delayed bias power pulse to the substrate holder after a delay between the source power pulse and the delayed bias power pulse. The delay is chosen based on the diffusion time constants of the first ions and the second ions so that the ion density ratio of the second ions to the first ions is a second ratio that is greater than the first ratio.

The utility model relates to the technical field of liquid crystal ion density testing, and discloses a liquid crystal ion density testing device for liquid crystal material preparation, which comprises a spring wire, a grip fixedly connected to the bottom of the spring wire, a connecting block fixedly connected to the bottom end of the grip, and a mounting ring fixedly connected to the bottom end of the connecting block. The device further comprises a testing device, a fixing mechanism, a clamping mechanism and an extruding mechanism. The testing device is arranged at the output end of the spring wire. Through a supporting spring, a positioning rod is convenient to move in a positioning hole, so that an extension cylinder and a mounting ring are convenient to fix or separate, a conduction rod can be conveniently replaced, a threaded cylinder is rotated anticlockwise, so that the threaded cylinder drives an extrusion ring to extrude a guide block, and the guide block drives a rotating plate to rotate in a movable groove; in this way, a rotating plate can drive a rubber pad to clamp and fix the outer wall of a conduction rod, and the conduction rod cannot slide up and down in a connecting block in the walking process of a worker.