439 results about "Charged particle" patented technology

The invention discloses a non-uniform and conformal grid-oriented electromagnetic particle adaptive simulation method and system, and relates to the technical field of electromagnetic particle simulation. The method comprises the following steps: performing non-uniform right-angle mesh generation based on a charged particle average free path, and identifying conformal mesh units; carrying out initialization by adopting macro particles; executing electromagnetic field propulsion, field interpolation, particle propulsion, charge current backfilling and collision simulation in each time step; and accelerated calculation is realized through a CPU and GPU hybrid parallel architecture. Through the method, the numerical simulation precision can be improved, the adaptability of complex geometry is enhanced, the coupling stability of the electromagnetic field and the particles is ensured, the information interaction between the field and the particles is improved, and the large-scale calculation efficiency is improved.

The invention relates to the technical field of light sources, particularly discloses a method and a device for adjusting the central position of a plasma, and aims to realize accurate positioning and stable control of the plasma by accurately controlling output parameters of a magnetic field generator. According to the method, a magnetic field generator with a specific shape and distribution is utilized, a magnetic field with a closed magnetic line structure is generated in a plasma chamber, charged particles in plasma are guided to move along a preset path, and it can be ensured that the plasma reaches and is kept at an expected position by monitoring and adjusting magnetic field parameters in real time.

A fine-adjustable electromagnetic lens for a charged-particle optical apparatus comprises a magnetic circuit assembly including one or more ring magnets, and a sleeve insert of generally rotational symmetry around a longitudinal axis. The sleeve insert surrounds a passage opening extending along the longitudinal axis, and comprises several electrically conductive electrode elements configured to generate an electrostatic field within the passage opening. The ring magnets are arranged circumferentially around an inner yoke shell and surrounded by an outer yoke shell; the inner yoke shell in turn surrounds a central portion of the sleeve insert. The ring magnets are magnetized such that the two magnetic poles are oriented towards the inner and outer yoke shell, respectively. The inner and outer yoke shell together with the ring magnets form a magnetic circuit having at least one gap, in order to generate a magnetic field reaching inwards into the passage opening and spatially overlapping with the electrostatic field generated by the sleeve insert.

A particle acceleration and extraction system includes a cyclotron having a stripping assembly and a target. The cyclotron includes an acceleration chamber and is operable to generate a magnetic field and an electric field in the acceleration chamber such that charged particles in the acceleration chamber are accelerated along a spiral path extending outward and at increasing energies from an initial energy E1 to a final energy E2, E2 being greater than E1. The target defines a target location outside of the acceleration chamber. The stripping assembly is positioned in the acceleration chamber and is operable to extract a charge from the charged particles at an intermediate location of the outward spiral path whereby the post-stripping assembly particles are directed towards the target location. The charged particles have an intermediate energy E3 at the intermediate location that is between E1 and E2.

Systems / techniques are provided for facilitating vacuum simulation for charged-particle microscopy grid receptacles. In various embodiments, an apparatus can comprise a positioning mechanism configured to be coupled to a vacuum chamber of a charged-particle microscope. In various aspects, the apparatus can comprise an adjustable force applicator coupled to the positioning mechanism and configured to simulate a vacuum for a microscopy grid receptacle located on an inner surface of a load-lock door of the vacuum chamber by mechanically pressing against an outer surface of the load-lock door.

The invention relates to a converter valve water-cooling voltage-sharing electrode charged particle distribution simulation method and system. The method comprises the following steps: constructing a three-dimensional geometric model of multiple types of voltage-sharing electrodes; constructing a charged particle multi-physics field coupling model based on the three-dimensional geometric model, wherein the coupling model comprises a flow field control equation, an electric field control equation and a particle dynamics model; simulation boundary conditions and initial conditions are set, the boundary conditions comprise flow field boundary conditions and electric field boundary conditions, and the initial conditions comprise particle release initial conditions; on the basis of the coupling model, the simulation boundary condition and the initial condition, particle tracking and distribution characteristic resolving are executed, a simulation result is obtained, and the simulation result comprises a particle motion trail, a particle capture rate and a capture area. Compared with the prior art, the method has the advantages of breaking through macroscopic monitoring limitation, realizing microcosmic dynamic quantitative analysis, analyzing a multi-field force competition mechanism, revealing a local scaling source, verifying the advantages of a multi-electrode structure, supporting optimal design and the like.

The invention provides a half-circle multi-machine-head radiotherapy system and method, and the system comprises a beam generation assembly; the beam current control assembly is connected with the beam current generation assembly; the beam output assembly is connected with the beam current control assembly, and the beam output assembly comprises a plurality of treatment heads which are all connected with the beam current control assembly; the rotating motor is arranged in the treatment head; and the rotating target is fixed with an output shaft of the rotating motor, the rotating target is relatively rotatably connected with the treatment head, and the rotating target is arranged in the treatment head. Charged particles are generated through the beam generation assembly, then the moving direction of the charged particles is changed through the beam control assembly, the charged particles with the changed direction are distributed to rotating targets in a plurality of treatment heads within a giant pulse time, and different radiation doses are given to a focus at different angles by distributing different pulse numbers to the rotating targets.

A particle beam illuminating system includes a beam steering control subsystem configured to receive charged particles and to generate and scan a particle beam over at least a portion of a target located a distance of at least 10 meters from the beam steering control subsystem. The system further includes a beam charge control subsystem configured to receive the particle beam from the beam steering control subsystem and to control an output charge of the particle beam impinging the target.

The invention provides heat pump comprising a chamber for accommodating electrically charged or chargeable particles, having a thermal conductive wall, and an electrically insulating sink wall. A resistive layer made of electrical resistive material, is positioned outside the chamber with one of its faces proximal to the sink wall. The chargeable particles hit the internal surface of the sink wall, and the thermal conductive wall is in thermal communication with the particles. Thermal fluctuations of the charged particle in the chamber induce variable electric field on the resistive layer, which is harvested into electric current.

The invention discloses a preparation method of a high-aspect-ratio glass through hole and the glass through hole. The preparation method comprises the following steps: forming a photoresist mask on the surface of a substrate; performing a first etching step, performing isotropic first etching on the substrate by using plasma of a first gas from which charged particles are filtered, and forming a first polymer layer on the inner wall of the formed through hole and the photoresist mask for protection; performing a second etching step, performing anisotropic second etching on the first polymer layer on the bottom of the inner wall by using plasma of a second gas, exposing the substrate below, and performing the first etching again; after the first etching step for a first preset number of times is completed every time, performing a treatment process on the formed through hole; and repeatedly executing the first etching step, the second etching step and the treatment process until the through hole is formed in the substrate. The process can be simplified, the selection ratio can be improved, the efficiency can be improved, and better side wall smoothness can be realized.

The application discloses a deposition device based on a programmable electrode array and a patterning deposition method, which comprises the following steps: generating charged particles and / or mist droplets by a charged particle source; an insulating substrate comprises a front surface for receiving deposition and a back surface opposite to the front surface; a programmable electrode array is arranged on the back surface of the insulating substrate and used for guiding the deposition of the charged particles and / or the mist droplets; a voltage driving unit is used for providing independent voltage signals for the electrode unit, and the voltage signals are pulse signals or direct current signals; and a control unit is used for programming and controlling the output of the voltage driving unit according to a target pattern, so that the programmable electrode array forms a spatial electric field corresponding to the target pattern on the front surface of the insulating substrate. Through the deposition device based on the programmable electrode array and the patterning deposition method, any pattern can be generated and changed instantly through programming of an electric field, and a physical mask is replaced by an electric mask, so that the physical mask is not needed, and the flexibility is extremely high.

Provided herein is an electron particle system comprising an electron source system comprising a high voltage component housed within a high voltage component volume occupied by an insulation gas, a sample chamber, and an electron beam column. Also provided herein is a charged particle system comprising a charged source system comprising a high voltage component housed within a high voltage component volume occupied by an insulation gas, a sample chamber, and an electron beam column. Further provided herein is a method of using an insulation gas in a high voltage component of an electron particle system.

The present invention relates to a cyclotron comprising first and second internal ion sources configured to form first and second beams of identical charged particles wherein the cyclotron is further configured to generate a local asymmetry of an accelerating electric and / or magnetic field, the first beam and the second beam are combined to form a combined beam and the combined beam passes through a single extraction outlet. The invention also relates to an acceleration system comprising N cyclotrons, where M cyclotrons are the cyclotrons according to the invention, Mgt; 0. The invention also relates to a device for treating a patient by BNCT, comprising: an acceleration system according to the invention; a target configured to emit an epithermal neutron beam when bombarded with the proton or deuteron multi-combination beam; and a treatment region configured to hold a patient to be treated within the treatment region.

The invention relates to a charged particle microscope (CPM) comprising a sample holder, for holding a sample; an ion beam column, for producing an ion beam that propagates along an ion axis onto said sample for creating a lamella in said sample; and a detector, for detecting radiation emanating from said lamella and / or said sample in response to irradiation by said ion beam. The CPM comprises a controller for at least partially controlling operation of said microscope. According to the invention, a manipulator device is provided that is arranged for transferring said lamella created in said sample out of said sample, wherein said manipulator device comprises a first elongated manipulator member with a first outer end, and a second elongated manipulator member with a second outer end. The outer ends are movable for mechanically gripping and releasing said lamella. In embodiments, the elongated manipulator members comprise off-set parts that increase manoeuvrability (accessibility) and monitorability of the manipulator device during use.

This invention discloses an ion trap teaching experiment observation device, including an observation box, an ion trap housed within the observation box, and a laser. The ion trap includes a linear ion trap and a ring-shaped ion trap. The observation box is a transparent, insulating box. The observation box has electrical ports for introducing AC and DC voltage sources to the electrodes of the ion trap. The observation box also has a first air blowing pipe port and a second air blowing pipe port. The first air blowing pipe port is used to install a first air blowing pipe to blow charged particles into the linear ion trap. The second air blowing pipe port is used to install a second air blowing pipe to blow charged particles into the ring-shaped ion trap. Two lasers are provided, one on each side of the linear ion trap and the other on the ring-shaped ion trap, for irradiating the trapped charged particles. This invention clearly demonstrates the flexibility of trapping physics based on radio frequency electromagnetic fields and symmetry.

The systems, methods, and communication cables taught herein provide cryogenic cooling, high voltage connections, and other electrical connections to a sample on a stage within a vacuum environment while still enabling stage motion in at least five degrees of freedom with minimal stage vibration to achieve new or improved measurement applications in situ within a microscope, such as in-situ microscopy, in-situ microscopy, in-situ microscopy, in-situ microscopy, in-situ microscopy, in-situ microscopy, in-situ microscopy, in-situ microscopy, in-situ microscopy, in-situ microscopy, and in-situ microscopy. Such as atomic probe chromatography and testing of quantum computing components. The connection cables taught herein combine connections into a single connection cable within an outer spring suitable for use in ultra-high vacuum. These connection cables are also shaped and configured to maintain at least a minimum spacing distance from components in the surrounding environment (e.g., chamber walls and other equipment) to prevent mechanical, electrical and thermal shortcuts.

A miniature electrode apparatus is disclosed for trapping charged particles, the apparatus includes, along a longitudinal direction, a first end cap electrode, a central electrode having an aperture, and a second end cap electrode. The aperture is elongated in the lateral plane and extends through the central electrode along the longitudinal direction and the central electrode surrounds the aperture in a lateral plane perpendicular to the longitudinal direction to define a transverse cavity for trapping charged particles. Electric fields can be applied in a y-direction of the lateral plane across one or more planes perpendicular to the longitudinal axis to translocate and / or manipulate ion trajectories.

A microfluidic system for controlling movement of charged particles, including a microfluidic channel, at least three electrodes, a plurality of conductor leads and at least two drive power supplies. Each electrode is in electrical contact with the electrolyte, and a pseudo-capacitance, a double-layer capacitance or a combination thereof is formed at an electrode-electrolyte interface. Each drive power supply periodically produces a voltage or current excitation, and is connected to one or more electrodes via the conductor leads. Each electrode continuously undergoes charging-discharging alternating cycles to form a traveling-wave electric field in the microfluidic channel. A maximum charge capacity of each electrode is greater than a total amount of charges transferred thereon during a charging or discharging process. A control method based on the microfluidic system is also provided.

The disclosure relates to a method of preparing a sample in a charged particle microscope. The method comprises the steps of providing a sample carrier having a mechanical support contour and a grid member connected thereto. The method comprises the step of connecting said sample carrier to a mechanical stage device of the charged particle microscope. Additionally, the method comprises the step of providing a sample, for example a chunk-shaped or lamella-shaped sample and connecting said sample to the grid member of the sample carrier. The method allows, in an embodiment, easy and reliable transfer of a sample between a bulk sample and a sample carrier.

Systems / techniques are provided that mitigate charging artifacts by scanning direction rotation. In various embodiments, the system may access a charged particle microscope carrying a specimen. In various aspects, a system may generate an aggregate image of a specimen based on a plurality of images of the specimen captured by a charged particle microscope according to a target scanning direction and a plurality of rotating scanning directions. In some cases, a plurality of rotational scanning directions and a target scanning direction may be uniformly distributed within a range of 360 degrees. In various instances, the specimen may be non-uniformly charged during scanning, each of the plurality of images may exhibit a corresponding charging artifact, and the aggregated image does not exhibit or reduces charging artifacts.

A vegetation flame condition direct current gap multi-physical field coupling simulation method, determines the physical quantity required for simulation of charged particle motion, distribution and electric field distribution in the air gap under the condition of applying direct current voltage under the condition of typical vegetation flame, the connection between each physical field; determine the control equation of each physical field; determine the simulation method of multi-physical field coupling; determine the chemical reaction equation corresponding to the vegetation and the pyrolysis material coefficient; measure the vegetation flame temperature distribution and leakage current data by combustion test; compare the simulation obtained flame temperature distribution and leakage current with the test obtained temperature distribution and leakage current data, determine the vegetation pyrolysis reaction equation and chemical reaction rate parameter; simulation calculation obtains the charged particle concentration distribution characteristics and the space electric field distribution characteristics affected by the charged particles generated by the flame combustion. The present application can obtain the charged particle motion, distribution characteristics and electric field distortion of the direct current gap under the condition of typical vegetation flame.

The application relates to a satellite energy acquisition system based on space charged particle collection, belonging to the technical field of spacecraft power supply. The application aims at solving the problem that the discharge phenomenon of the space charged particles deposited on the surface of a satellite can cause physical damage to materials. The application comprises a collection capacitor used for capturing the space charged particles, forming a high-voltage electrostatic field through the accumulated charges of the space charged particles; an energy-taking conversion circuit used for converting the high-voltage electrostatic field energy stored in the collection capacitor into low-voltage electrostatic field energy and transferring the low-voltage electrostatic field energy to an energy storage capacitor; the energy storage capacitor is used for storing the low-voltage electrostatic field energy, setting a target electric field energy according to the working requirement of a rear-end load, and discharging after the target electric field energy is reached; and a switch voltage stabilizing circuit used for adjusting the discharging output voltage of the energy storage capacitor, realizing constant voltage power supply for the rear-end load. The application can reduce the charging and discharging fault risk of the surface of the satellite by collecting the particles radiated to the satellite and controllably transferring and utilizing the particles.

1. The name of the design product: sleep machine. 2. The use of the design product: to improve human sleep by generating charged particle waves. 3. The design points of the design product: in the combination of shape and pattern. 4. The picture or photo that best indicates the design points: perspective view 1.

Hydrogenation reactions are catalyzed by driving charged particles (e.g., an electric current or particle beam) into and / or through a catalytic material so as to deliver energy for hydrogenation of one or more compounds chemisorbed by the catalytic material. The energy provided by the charged particles may be adjusted (e.g., based on a measured temperature and / or pressure associated with the reaction) to maintain a desired reaction temperature and / or prevent overheating of the reaction. In one example, hydrogen loading of the catalytic material (e.g., via electrolysis) enhances reaction rates. A wide variety of organic and inorganic reactants are contemplated for applications in food, energy production and storage (e.g., fossil-fuels, bio-fuels, petrochemicals, fuel cells), pharmaceuticals and other chemicals, as well as environmental applications (e.g., wastewater treatment, emissions reduction, carbon capture and sequestration).

The present disclosure relates to a module of a trap for charged particles (e.g. ions), to manufacturing such module, to a trap including the module and a manufacturing of such modular trap . The module comprises a monolithic body made of a non-conductive substrate and an electrode arranged on a portion of a surface of the monolithic body. A part of the monolithic body forms a spring element. An electrically conductive area is arranged on and covers a portion of a surface of the spring element and is conductively connected with the electrode. The spring element is adapted to compress upon pressure applied on the electrically conductive area.

The invention relates to a cyclotron which enables the production of α- or β-emitting radionuclides. The cyclotron, with a magnetic periodicity of 3, comprises three accelerating cavities connected to the centre, thus not requiring phase control between the cavities, forming a single high-frequency resonator. The six accelerating gaps per turn enable rapid acceleration (the angle ϕ between the accelerating gaps of each cavity being approximately 30°) which is essential for acceleration at the third and sixth harmonics. This cyclotron preferably has an injection system (31) supplied by different types of ion sources, making it possible to efficiently accelerate charged particles having Z / A ratios equal to 1 / 2 and to 1 / 4. The cyclotron may also have stripping extraction means positioned in the cyclotron so as to extract the charged particles and double their state of charge. These particles enable a set of nuclear reactions for producing α-emitting radionuclides.

The application relates to the technical field of plasma, in particular to a processing device for coaxial pulse trapezoidal magnetic field regulated plasma jet, which comprises a gas-liquid control module, a plasma generation module, a pulse trapezoidal magnetic field generation module, a power excitation module, a synchronous controller and a plasma processing module; the pulse trapezoidal magnetic field generation module is connected with the plasma generation module and is used for generating a coaxial pulse trapezoidal magnetic field with adjustable parameters; the radial component of the coaxial pulse trapezoidal magnetic field is perpendicular to the movement direction of charged particles in the plasma jet, the plasma jet is provided with a radial expansion or contraction Lorentz force, and the processing area of the plasma jet is adjusted. The device provided by the application generates a stable, dispersed, gas-temperature-near-room-temperature and adjustable-action-area plasma jet, realizes efficient, accurate and low-energy-consumption processing of a target object, and achieves good processing effect.

A method for simulating the transport of charged particles in an external magnetic field B is provided, in which the unit direction vector of the charged particle, according to Newton's second law u′(t) = F(u(t), η(t)), includes a force term F, which depends on the unit direction vector u(t) and further nonlinearly depends on the particle's motion variable η(t). According to this method, Newton's second law is solved using an implicit finite difference method, where, over the duration of a time step, the force term is approximated by interpolated values ​​of the unit direction vector and the motion variable, where the interpolation of each quantity is a combination of the values ​​of that quantity at the endpoints t and t+Δt of the time step. This method can be used to calculate the dose when a radiation delivery system 300 delivers a treatment plan P to a patient 310.

The application discloses a capsule unit for display, a display structure, a display device and a manufacturing method, and belongs to the technical field of display. The capsule unit comprises a shell, a closed cavity is formed in the shell, and electrophoretic liquid is filled in the cavity; a partition plate is rotationally connected in the cavity, and at least two containing cavities are defined in the cavity, charged particles of the same color are arranged in each containing cavity, the charged particles in each containing cavity are different in color, the charged particles of each color can be driven by a corresponding electric field to approach a display side of the capsule unit relative to charged particles of other colors, and the electric fields corresponding to the charged particles of different colors are different in electric field direction and / or field strength. According to the capsule unit, mutual collision between the charged particles of different colors is avoided, the response time is shortened, the non-displayed charged particles are separated, the influence on display is reduced, and the contrast is improved.

Systems and methods for simultaneous phase-contrast imaging and electron energy loss spectroscopy. The method and system for imaging a sample with charged particles include guiding charged particles toward the sample along a principal axis, and simultaneously detecting a first portion and a second portion of the charged particles transmitted through the sample using a first detector and a second detector, respectively. The second detector is positioned downstream of the first detector. Each of the transmitted charged particles exits the sample at an exit angle between the direction of the transmitted charged particle and the principal axis. The exit angle of the first portion of the transmitted charged particle overlaps with the exit angle of the second portion of the transmitted charged particle. In this way, complementary information, such as structural and compositional information, can be obtained simultaneously.