44449 results about "Atomic physics" patented technology

The present disclosure provides a charged particle element and relates apparatus and methods. In one arrangement, the element comprises a beam manipulator configured to operate on a plurality of charged particle beams in a beam grid. The beam manipulator comprises a plurality of plates. Each plate has two surfaces and a plurality of apertures. The plates comprises at least one curved-surface plate with a curved surface. The curved surface faces a facing surface of an adjacent plate. Deflections are applied to beams by controlling a potential difference between the curved surface and the facing surface.

The invention relates to the technical field of MOS semiconductors, and discloses a variably doped planar gate silicon carbide VDMOS device and a preparation process thereof, the variably doped planar gate silicon carbide VDMOS device comprises a plurality of MOS cells which are parallel to each other, and each MOS cell comprises a drain electrode, a semiconductor epitaxial layer, a source electrode and a grid electrode; the semiconductor epitaxial layer comprises an N substrate layer, an N drift layer, a P + layer, an N well layer and a P well layer, and a lightly doped N layer is arranged in the middle of the N drift layer of a single MOS cell; lateral symmetric P-layers are arranged in the single MOS cell and located on the left side and the right side of the N drift layer, and the section contours of the corresponding sides of the lateral symmetric P-layers on the two sides are in an arc shape. By arranging the lightly doped N layer in the middle of the N drift layer and introducing the arc-shaped laterally-symmetrical P-layers to the two sides, the electric field distribution of the device is optimized, the local electric field concentration is reduced, the breakdown voltage is remarkably improved, and the charge balance capability is enhanced and the leakage current is reduced through the contact between the laterally-symmetrical P-layers and the N substrate layer.

A coil configuration and method for transcranial magnetic stimulation enabling stimulation of deep regions of the brain without excessively stimulating the cortex is provided. The coil configuration utilizes at least one coil to produce an off-plane magnetic field to enhance the magnetic field from a top TMS coil. In one configuration at least a single variable position coil referred to as the Variable Halo Coil and positionable vertically and / or angularly is used.

A system for administering transcranial magnetic stimulation in which two or more coils are applied to the patient's body. The coils each may emit a magnetic field which when positioned in one or more configurations result in field overlapping. Magnetic field overlap achieves therapeutic effects otherwise difficult, or impossible, to achieve from traditional single coil TMS devices.

A device for deep transcranial magnetic stimulation regulation treatment is provided. The device includes an upper computer control software, configured to send a stimulation instruction to a system main control module according to predetermined parameter data; a system main control module, configured to send a control enable signal to a stimulation coil excitation power module when receiving the stimulation instruction; a stimulation coil excitation power module, configured to provide a current to a deep stimulation coil module according to the control enable signal; and a deep stimulation coil module, configured to generate a superimposed magnetic field and transmit the superimposed magnetic field to a target region. The deep stimulation coil module includes multiple coil groups. Each coil group includes two coils. There is an overlapping part among magnetic fields of the multiple coil groups, and the overlapping part corresponds to a predetermined target region.

A driving method of a transcranial magnetic stimulation 3D coil device is disclosed, which includes: determining first and second signal peaks corresponding to a specified rotating magnetic field direction, in which the first and second signal peaks respectively correspond to first and second coils in multiple coils; providing a first pulse current having the first signal peak to the first coil, in which the first pulse current signal stimulates the first coil to provide a first magnetic field; providing a second pulse current signal having a second signal peak to the second coil, in which the second pulse current signal stimulates the second coil to provide a second magnetic field, in which the first magnetic field and the second magnetic field form a rotating magnetic field having the specified rotating magnetic field direction.

The invention discloses a sparse finite angle CBCT reconstruction method and system based on residual diffusion and a storage medium, and the method comprises the steps: carrying out the CBCT sparse finite angle scanning of a to-be-detected target, and obtaining sparse projection data; fDK reconstruction is carried out on the sparse projection data to obtain an initial CBCT image; generating a first optimized CBCT image from the initial CBCT image through an image pre-training network; through the first optimized CBCT image and the sparse projection data, using the trained residual diffusion model to determine a residual image of the to-be-detected target; summing the first optimized CBCT image of the to-be-detected target and the residual image of the to-be-detected target to obtain a second optimized CBCT image of the to-be-detected target, and the second optimized CBCT image is a final CBCT reconstruction image. According to the method, the problems of stripe artifacts and low-contrast tissue annihilation under limited angle scanning are solved, the large-view CBCT reconstruction resolution is improved, and the radiation dose is reduced.

A nuclear fusion reaction device, system and method. The outer wall of a vacuum chamber (301) in the nuclear fusion reaction device (30) comprises an inner ring surface (M1) and an outer ring surface (M2) which are connected to each other; the outer ring surface (M2) surrounds the inner ring surface (M1); the inner ring surface (M1) protrudes toward the central axis of the vacuum chamber (301); the vacuum chamber (301) surrounds a plurality of first coils (302); at least some of the plurality of first coils (302) extend in the circumferential direction of the inner ring surface (M1) and are sequentially arranged in the axial direction of the vacuum chamber (301); a plurality of second coils (303) surround the vacuum chamber (301), extend in the circumferential direction of the outer ring surface (M2), and are sequentially arranged in the axial direction of the vacuum chamber (301); a plurality of third coils (304) all surround the vacuum chamber (301) and are sequentially arranged in the circumferential direction of the vacuum chamber (301); and the plurality of first coils (302), the plurality of second coils (303), and the plurality of third coils (304) are used for generating a magnetic field, such that plasma rings with negative triangular deformation are generated in the vacuum chamber (301), and a fusion reaction occurs.

The invention discloses a method for continuously and efficiently adsorbing and separating hydrogen isotopes. The hydrogen isotopes are separated by adopting a multi-tower variable-temperature variable-pressure device operated in a simulated moving bed operation mode. When the device runs, each adsorption tower needs to sequentially execute the following steps: 1, adsorption; 2, replacement; 3, heating; 4, vacuumizing and desorbing; 5, carrying out vacuum purging; 6, pressurizing and cooling; the operation mode of the simulated moving bed is that an adsorption tower is frequently, sequentially and synchronously moved along the gas flowing direction in the tower through all gas input and output ports, so that an adsorbent phase and a gas flowing phase in the tower form countercurrent flow, and the hydrogen isotope adsorption separation efficiency is enhanced. The invention relates to a technological process of cyclic adsorption, replacement, heating, vacuum desorption, pressurization and cooling, continuous and efficient hydrogen and isotope adsorption separation is realized, multi-tower serial adsorption and replacement are adopted in the process, and separation of hydrogen isotopes (such as H2 / D2) is enhanced; and the desorption efficiency of heavy components is improved by adopting a heating and vacuumizing depressurization coupling mode.

The invention provides a preparation method of a transmission electron microscope ultrathin sample with a cross section of an electron beam sensitive material, which comprises the following steps: selecting a specific region as a to-be-extracted sample region for the electron beam sensitive material by adopting an electron beam imaging technology; depositing a protective layer on the surface of the to-be-extracted sample area by adopting an electron beam and / or an ion beam; bombarding a to-be-extracted sample area by utilizing a high-energy ion beam, extracting an electron beam sensitive material cross section sample from the to-be-extracted sample area, and fixing the extracted sample to a metal bracket; performing pre-thinning treatment on the extracted sample by using a focused ion beam to obtain a first thinned sample of which the thickness is reduced to be less than a first thickness; and transferring the first thinned sample into a micro-beam fixed-point ion thinning system, and carrying out multi-time stepped low-energy ion beam fine thinning treatment on the first thinned sample by using inert gas ion micro-beams to obtain a second thinned sample which is clean in surface and free of a surface ion damage layer and has the thickness reduced to be less than a second thickness, and taking the second thinned sample as a transmission electron microscope ultrathin sample.

The present disclosure provides a display substrate and a method of manufacturing the same, a display panel, and a display apparatus. The display substrate includes a base substrate, pixel units are arranged in an array on the base substrate, each pixel unit includes an anode, a light-emitting functional layer and a cathode, a pixel definition layer is provided, and has a plurality of openings, and each opening exposes a portion of an anode; the light-emitting functional layer is located in the opening; at least a portion of two opposite ends of the anode along a first direction is warped in a direction toward the cathode, an orthographic projection of the warped portion of the anode on the base substrate does not overlap with that of the cathode on the base substrate, and a hollow region is provided at a position of the cathode at least corresponding to the warped portion.

The invention discloses an absolute type planar two-dimensional time grating displacement sensor based on an alternating electric field and a measuring method. Excitation signals are applied to X excitation pairs in sequence, when an induction electrode generates an induction signal, the excitation signals are stopped from being applied to the remaining X excitation pairs, and four paths of electric signals generated by an induction group are processed, so that the absolute type planar two-dimensional time grating displacement sensor based on the alternating electric field is obtained. Obtaining the X excitation antipode of the movable ruler base body and the displacement position of the movable ruler base body in the X excitation antipode so as to obtain the two-dimensional time grating absolute displacement value of the movable ruler base body relative to the fixed ruler base body in the X direction; similarly, a two-dimensional time grating absolute displacement value of the movable ruler base body in the Y direction is obtained; and then taking the two-dimensional time grating absolute displacement values in the XY direction as the coordinates of the movable ruler base body in the XY direction to obtain the absolute displacement of the movable ruler base body. The absolute positions in the X direction and the Y direction are obtained in a scanning mode so as to achieve planar two-dimensional absolute displacement measurement, accumulated errors and random errors can be reduced, the measurement precision can be improved, and wide-range high-precision measurement can be achieved.

The present disclosure discloses a circularly polarized satellite antenna based on a magnetoelectric dipole. A floor is slotted, and an equivalent magnetoelectric dipole is excited using a grounded right-angle folded dipole, while two square parasitic patches are loaded to enhance a radiation performance, thus exciting a broadband high-gain circularly polarized radiation beam. The present disclosure utilizes the L-shaped right-angle folded dipole to simultaneously realize an ingenious combination of an electric dipole and a magnetic dipole, realizing a good circularly polarized radiation performance. At the same time, the present disclosure realizes circularly polarized radiation using a form of the magnetic dipole, which results in a stable pattern and a high gain.

One variation of a system includes a pressure vessel: including a wall; defining a primary working fluid circuit extending vertically within the wall; defining a secondary working fluid circuit extending vertically within the wall and fluidly isolated from the primary working fluid circuit; and configured to store a nuclear fuel, a primary working fluid, and a secondary working fluid. The wall of the pressure vessel: defines a heat exchanger configured to transfer thermal energy from the primary working fluid flowing through the primary working fluid circuit into the secondary working fluid flowing through the secondary working fluid circuit; and defines a radiation shield configured to attenuate radiation emitted by the nuclear fuel.

The invention relates to an optically controllable switching device having a first and second line section, between which an optically controllable switch (T2) is inserted, and having a sensor element (SE). The optically controllable switch (T2) disconnects or connects depending on an optical switching signal (SB), whether the switch is "on" or "off". The sensor element (SE) comprises a carrier material (TM) with crystals comprising one or more paramagnetic centers (NV). When irradiated with pump radiation (LB), the sensor element (SE) emits fluorescent radiation (FL) which depends on the magnetic flux density B at the location of the sensor element (SE). A line current (I LTG) in the first line section of the line (LTG) generates a magnetic field with a flux density B which, with sufficient current strength, influences the fluorescent radiation (FL) from one or more paramagnetic centers (NV). The optically controllable switching device has first means (LWL1, PL1, LIV) for irradiating the one or more paramagnetic centers (NV) with pump radiation (LB) and second means (LWL2, F1, PD, LIV) for detecting and separating the fluorescent radiation (FL) and for detecting a measured value signal which depends on the intensity of the fluorescent radiation (FL) and / or on the phase shift of the modulation signal of the temporal profile of the intensity of the fluorescent radiation (FL). The optically controllable switching device has third means (LIV) for generating an optical switching signal (SB) and for controlling the state of the optically controllable switch (T2) using this optical switching signal (SB).The optical switching signal (SB) depends on the intensity of the fluorescence radiation (FL) and / or on the phase shift of the modulation signal of the temporal course of the intensity of the fluorescence radiation (FL).

An X-ray inspection device according to one embodiment of the present disclosure includes: an X-ray output portion irradiating X-rays to a battery including a cathode, a separator, and an anode in a stacking direction of the cathode and the anode; an X-ray detection portion acquiring a plurality of gray values based the X-rays that have transmitted through the battery; a signal processing portion acquiring an X-ray image including the plurality of gray values; and an inspection portion determining whether the battery is defective based on a distance between a first edge of an anode area including gray values representing the anode layer and a second edge of a cathode area including gray values representing the cathode layer in the X-ray image.

The invention discloses a SiC MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) device with a high-mobility gate oxide layer and a preparation process of the SiC MOSFET device, and belongs to the technical field of semiconductors. Comprising a drain electrode, a semiconductor epitaxial layer, a source electrode and a grid electrode; the semiconductor epitaxial layer comprises an N substrate layer, an N drift layer, a P + layer, an N well layer and a P well layer, and a lightly doped N layer is arranged in the middle of the N drift layer of each MOS cell; by optimizing the gate oxide layer preparation process and combining the design of the T-shaped P-layer, the semi-elliptical lightly doped N-type half layer and the like in the device, the interface quality of the gate oxide layer and a semiconductor material is effectively improved, the scattering of a carrier by an interface state is reduced, and meanwhile, due to the synergistic effect of the structures such as the quarter-circle-shaped side symmetric P-layer and the square heavily doped N layer, the performance of the device is improved. The internal electric field distribution and the carrier transmission path of the device are optimized, and the channel carrier mobility is remarkably improved.

The present invention discloses an electrophysiological catheter having a distal microelectrode assembly, the distal microelectrode assembly having a covered ridge carrying a plurality of microelectrodes. The microelectrode assembly includes a first ridge radiating away from the longitudinal axis and a second ridge adjacent to the first ridge and radiating away from the longitudinal axis, the first ridge having a plurality of first microelectrodes disposed thereon. The second ridge has a plurality of second microelectrodes disposed thereon such that a first virtual circle intersecting one of the plurality of first microelectrodes does not intersect any of the second microelectrodes.

The invention relates to the field of medical equipment, and provides a compact multi-chamber proton treatment system based on a shared beam line, and the system comprises a fixed beam transmission line which is used for guiding the movement direction of a proton beam into a vertical direction; the rotating beam transmission line is used for guiding the movement direction of the proton beam into the horizontal direction; one end of the fixed beam transmission line is connected with the proton cyclotron, the other end of the fixed beam transmission line is connected with one end of the rotary beam transmission line, and the other end of the rotary beam transmission line is in butt joint with a plurality of treatment rooms; the rotating beam transmission line rotates around a central axis extending in the vertical direction. According to the invention, the proton beam can be safely, efficiently and accurately transmitted to each treatment room, and a fixed beam transmission system and a rotating rack do not need to be independently arranged for each treatment room, so that the beam control assembly and the system occupied area of the multi-room particle treatment device are minimized, and the number of treated patients can be remarkably increased.

The embodiment of the invention provides a solar cell and a preparation method thereof, and a photovoltaic module. In the embodiment of the invention, a first internal expansion layer with the same conduction type as a first doping layer and / or a second internal expansion layer with the same conduction type as a second doping layer are / is arranged in an interval region used for forming an isolation region on the back surface of a silicon substrate; and the first internal expansion layer and the second internal expansion layer are electrically connected, so that the field passivation effect can be realized, the recombination of minority carriers in the isolation region can be effectively reduced, reverse conduction can be realized when the battery piece is shielded, the breakdown can be avoided, and the hot spot prevention effect can be effectively realized.

The invention relates to a micro-display device based on multilayer stacking and a preparation method thereof, the micro-display device comprises a driving backboard and a plurality of pixel layers, and the driving backboard is provided with a first type of electrode contacts; the multiple pixel layers are sequentially stacked in the Z direction, sub-pixels are arranged in each pixel layer, the bottom end of each sub-pixel is electrically connected to the corresponding first type of electrode contact, and the top end of each sub-pixel is electrically connected to the corresponding first conductive layer; in two adjacent pixel layers in the multiple pixel layers, the first conductive layer of one sub-pixel in the upper pixel layer is in direct contact with the first conductive layer of one sub-pixel in the lower adjacent pixel layer. The invention also discloses a preparation method of the micro display device. According to the invention, the processing technology and the cathode interconnection structure are simplified; and meanwhile, the current conduction capability is enhanced, the power consumption of the device is reduced, and the reliability and stability of the display device are improved.

The technology relates to enhancing performance of quantum sensor operation in a noisy environment. Quantum neural networks are used to pre- and post-process analog signals to which qubits of a quantum sensor are exposed. Intra-processing using additional quantum neural networks may also be employed. This approach filters out noise from both the input analog signal and the system itself to achieve a very high signal to noise ratio. This permits the system to detect induced dynamics associated during exposure of the qubits to the analog signals. This enables the quantum sensor to sense a change in a state of a system under test, which can be beneficial for areas such as imaging, magnetometry, sensing electric fields, optomechanical sensors, quantum radar and other areas where enhanced signal to noise ratios are desired.

The invention relates to a compact polarization rotation beam splitter, which comprises an input waveguide, a mode conversion region, a mode coupling region and an output waveguide, a TM0 mode optical signal in the optical signals is converted into a TE mode high-order optical signal in the mode conversion area; the mode coupling region is used for coupling the TE mode high-order optical signal into a TE0 mode optical signal with the first adiabatic coupling waveguide; and the output waveguide is used for outputting a TE0 mode optical signal which is not subjected to mode conversion in the optical signals, and outputting a TE0 mode optical signal obtained after mode conversion of the mode conversion area and the second adiabatic coupling waveguide. According to the invention, the polarization rotation path can be shortened through high-order mode conversion in the mode conversion area, efficient beam splitting is realized by using the asymmetric adiabatic coupling waveguide in the mode coupling area, the size reduction of a redundant structure is avoided through function integration, the performance of the beam splitter is ensured, and the problems of large size and low cost of the existing polarization rotation beam splitter are solved. And the performance is not good.

An apparatus includes an x-ray source configured to generate x-rays, at least some of which impinge a sample and at least one diffractor configured to concurrently diffract at least some of the x-rays from the sample in a first direction and in a second direction substantially orthogonal to the first direction. The apparatus further includes at least one two-dimensional (2D) position-sensitive x-ray detector configured to receive at least some of the diffracted x-rays and to concurrently generate first spectral information of the x-rays diffracted in the first direction and second spectral information of the x-rays diffracted in the second direction. The apparatus further includes circuitry configured to receive the first and second spectral information and to generate a single x-ray absorption spectroscopy (XAS) spectrum using the first and second spectral information.

The present application relates to the field of nuclear reactor simulation. Disclosed are a fast simulation method and system for multi-physical field coupling and a storage medium. The method comprises: at intervals of a first preset interval time, collecting state information of each physical field of a nuclear reactor in a transient process, so as to obtain physical field snapshots of a plurality of physical fields, the transient process being simulated by a reactor simulation model corresponding to the nuclear reactor; stitching the physical field snapshots of the plurality of physical fields, so as to obtain a fully-concatenated physical field; constructing a matrix on the basis of the fully-concatenated physical field; performing order reduction processing on the matrix, so as to construct a timing model corresponding to the fully-concatenated physical field; and decomposing the timing model corresponding to the fully-concatenated physical field, so as to obtain timing models corresponding to the plurality of physical fields. The fast simulation method for multi-physical field coupling of the present application can reduce the inconsistency between different physical fields while increasing the computation speed.

The invention discloses a single-coil winding type four-eight-pole composite iron system for beam homogenization. The composite iron system comprises a composite magnet current control device, a composite magnet main power supply and four-pole / eight-pole composite iron, the quadrupole / octupole composite iron has eight pole heads, and only one type of excitation coil is wound on each pole head; the current value of the A-type excitation coil is an absolute value of a quadrupole magnetic field excitation current value plus an octupole magnetic field excitation current value; the current value of the B-type excitation coil is an absolute value obtained by subtracting an octupole magnetic field excitation current value from a quadrupole magnetic field excitation current value; the quadrupole / octupole composite iron is used for simultaneously generating a dominant quadrupole magnetic field and an octupole magnetic field, so that the effects of quadrupole iron and octupole iron can be simultaneously realized by only installing one transmission element; the excitation coil structure of the quadrupole / octupole composite iron composite magnet is improved, and only one excitation coil is wound on each pole head, so that the size of the coil structure can be reduced, and the construction cost is reduced.

The invention discloses a high-speed multi-photon detection system and method. The system comprises a detector and a signal processing circuit, wherein the detector is composed of a window plated with a photoelectric cathode, a micro-channel plate stack and an anode; a plurality of incident photons are converted into a plurality of photoelectrons by the photoelectric cathode, and the photoelectrons are converted into electron cloud by the micro-channel plate stack; the incident electron cloud is divided into multiple paths by three layers of staggered metal strip electrodes of the anode, and charge collection is carried out to obtain charge short pulses of each layer of electrode; the signal processing circuit converts the charge short pulses transmitted by the three layers of electrodes into digital pulse signals, obtains the centroid coordinates of the electron cloud from the digital pulse signals as the abscissa value, the ordinate value and the verification value of the incident photon position, combines the abscissa value, the ordinate value and the verification value based on the screening condition to obtain the target two-dimensional coordinates, and finally obtains the target two-dimensional coordinates. And transmitting to a terminal for imaging display. According to the invention, a plurality of synchronous photons can be detected, the overall counting rate of the detector is greatly improved, and the detection efficiency is improved.

The embodiment of the invention provides a display panel, a display device and a preparation method of the display panel, the display panel comprises a substrate, a first flat layer, a pixel definition layer, an isolation structure, a light emitting device layer, a packaging layer and an isolation piece, the first flat layer is arranged on one side of the substrate; the pixel definition layer is arranged on the side, away from the substrate, of the first flat layer, and the pixel definition layer comprises a pixel opening located in the display area and a first opening located in the non-display area; the isolation structure is located on the side, away from the substrate, of the pixel definition layer and provided with a plurality of isolation openings; the light-emitting device layer comprises a plurality of light-emitting units located in the display area. The packaging layer is located on the side, away from the substrate, of the isolation structure; the separator is located in the non-display area, and the separator is arranged between the first flat layer and the packaging layer. According to the invention, the separator reduces or prevents water vapor from flowing between the first flat layer and the packaging layer, and the service life of the light-emitting unit is prolonged.