245 results about "Microchannel plate detector" patented technology

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 invention discloses a micro-channel plate manufacturing method, which comprises the following steps of: bombarding a processing sample through heavy ions to form a plurality of micro-channels on the processing sample; cleaning the path of the micro-channel, and expanding the aperture of the micro-channel; performing high-impedance treatment on the inner wall of the micro-channel to form a high-impedance inner wall; on the basis of the steps, the high-energy heavy ions generated by the high-energy accelerator are used for bombarding the glass sample with set parameters to manufacture the micro-channel plate, so that the tedious manufacturing processes of manufacturing a capillary glass tube and machining and shaping are omitted; the production efficiency is improved, the manufacturing time is shortened, and the production cost is reduced. The technical problem that much inconvenience is brought to production, processing and use due to the fact that micro-channel plates in the market are prone to deformation and even damage in the production process is solved.

A method for preparing a profiled microchannel plate heat exchanger, and belongs to the technical field of heat exchange. The method based on a combination of a plurality of methods formed by selective laser melting and micro electrical discharge machining can realize a profiled microchannel plate heat exchanger having large aspect ratio flow channels and closed profile section flow channels.

The invention relates to a preparation method of a micro-channel plate, and the method comprises the following steps: 1) processing a transparent material to obtain a micro-channel plate substrate blank; 2) carrying out ultrasonic cleaning on the micro-channel plate substrate blank; 3) performing femtosecond laser induction on the cleaned micro-channel plate substrate blank to modify a glass substrate to form a modified area array; 4) performing ultrasonic chemical etching on the micro-channel plate substrate blank, and corroding the modified area array to form a through hole array; and 5) forming a micro-channel plate glass substrate, and carrying out ultrasonic cleaning on the micro-channel plate glass substrate. The invention has the following beneficial effects: (1) the problem of high manpower and cycle cost caused by various processes such as glass tube drawing, monofilament drawing, multifilament drawing, leveling and the like in the traditional process is solved; and (2) due to the adoption of accurate control and micro-nano manufacturing technologies, the technical problem of high-performance and low-cost preparation of the micro-channel plate is solved, and the yield is improved.

The invention relates to a photomultiplier testing device and a photomultiplier testing method, in particular to a pulse saturation recovery characteristic testing device and a pulse saturation recovery characteristic testing method for a micro-channel plate type photomultiplier, and solves the problem that an existing MCP-PMT pulse saturation recovery characteristic testing device does not meet actual application requirements. And the pulse saturation recovery characteristics under different saturation depths and different recovery degrees cannot be evaluated. According to the invention, a pulse saturation recovery characteristic test is carried out on the MCP-PMT by using a laser diode and an optical attenuation sheet in a camera obscura environment, a pulse signal generator, a power divider, a combiner, a high-voltage source, a digitizer and a data processing unit, and the pulse signal generator successively generates two paths of driving pulse signals with different pulse widths. The method accords with the actual application requirement of the MCP-PMT working in a linear state, the measurement result can reflect the saturation recovery characteristic of the MCP-PMT in the actual application, and the pulse saturation recovery characteristic of the MCP-PMT under different saturation depths and different recovery degrees can be evaluated.

The invention provides a film coating tool and method for film coating operation of a large-size micro-channel plate. The film coating tool comprises a film coating base and a three-jaw gland rotationally matched with the film coating base. The coating base is in a horn mouth shape and is provided with a circular groove, a first conical boss and three U-shaped grooves formed in the outer side of the first conical boss. The three-jaw gland is in a horn mouth shape and is provided with a circular convex groove, a second conical boss and a positioning pin matched with the U-shaped groove. And the positioning pins can be operated to be embedded into the corresponding U-shaped grooves and are rotated and locked, so that the coating base, the micro-channel plate and the three-jaw gland are locked and assembled into the integrated coating clamp for subsequent coating treatment of the micro-channel plate. The tool and the method are suitable for preparation of the large-size microchannel plate with the high surface quality requirement, the tedious operation that a clamp is manually inverted to turn over is not needed in the microchannel plate coating process, surface defects caused by people are effectively avoided, and the production efficiency is improved while the surface quality of the microchannel plate is improved.

The invention relates to centrifugal bending equipment, a bending type channel micro-channel plate and a preparation method and application of the bending type channel micro-channel plate. The centrifugal bending equipment comprises a high-temperature furnace which is of a cylindrical cavity structure comprising a cavity and a furnace wall and is arranged in the axis vertical direction; a heating body is arranged in the furnace wall; the centrifugal acceleration system comprises a rotating tray; a centrifugal bending fixture is arranged on the rotary tray; the rotary tray and the centrifugal bending fixture can rotate in a horizontal plane around the axis of the high-temperature furnace; the control system is connected with the high-temperature furnace and the centrifugal acceleration system; and the control system sets and controls the temperature in the high-temperature furnace and the rotating speed of the centrifugal bending fixture according to the technological parameters. The technical problem to be solved is how to provide the bending type channel micro-channel plate so as to reduce and eliminate positive ion feedback noise and electron transmission noise of the micro-channel plate. Meanwhile, the preparation process effectively solves the problems of channel aperture deformation and inconsistent bending curvature, and avoids causing non-uniform MCP gain and reduction of imaging resolution.

The invention relates to the field of plate hot pressing, and discloses a plate hot pressing device which comprises at least one set of hot pressing plate assemblies. The phase change heat storage tank is in thermal coupling connection with the hot pressing plate assembly and used for storing waste heat; the plate preheating bin is arranged at the feeding end of the hot pressing plate assembly and is in hot connection with the phase change heat storage tank; the hot pressing plate assembly sequentially comprises a pressing plate base body plate layer used for supporting a load and transmitting pressure to the surface of a plate; the micro-channel plate layer is internally provided with double flow channels, heating fluid and recycling fluid flow in different flow channels respectively, captured waste heat is stored in the phase change heat storage tank, and the micro-channel plate layer is fixedly arranged on the heat transfer surface of the pressing plate base body plate layer; and the heat insulation protection plate layer is fixedly arranged on the non-heat-transfer surface of the micro-channel plate layer. According to the hot press plate waste heat recovery system, in-situ capture and utilization of waste heat in the plate pressing-cooling process are achieved by constructing a micro-channel heat exchange network in the hot press plate, and the waste heat recovery efficiency is remarkably improved.

The present invention provides a micro-channel plate, a preparation method therefor and the use thereof. The micro-channel plate is provided with a plurality of through channels, wherein on the side of an inlet end face of the micro-channel plate, a flared end face of each channel is a hexagonal tapered hole; and in a cross section perpendicular to the axial direction of each channel, the outer edge of the flared end face of the channel is hexagonal, and the inner edge thereof is circular. The present invention provides a micro-channel plate having hexagonal special-shaped flared holes, which micro-channel plate has a micro-hole array presented as hexagonal tapered holes on an end face and cylinders inside; a circular packed array is replaced by a hexagonal close-packed structure, so that the close packing coefficient of a channel array of the micro-channel plate is increased from 0.907 in existing hexagonal arrangements of circular channels to 1 in the hexagonal arrangement of hexagonal channels, and when the channel wall thickness of the channel of the micro-channel plate at the flared end face is greater than or equal to 100 nm, the opening ratio of the micro-channel plate is greater than or equal to 91%. The opening ratio of an input surface of the micro-channel plate is significantly increased, the detection efficiency of the micro-channel plate regarding input signals is improved, and flared tips and tip discharge caused thereby are avoided, such that the micro-channel plate is more suitable for practical application.

Image intensifier systems incorporating a microchannel plate (MCP) and methods for producing the same are disclosed. A device is disclosed that includes a first substrate having a radiation-receiving first surface and an opposed second surface through which electromagnetic radiation is transmitted. A second substrate is coupled to the first substrate to define a vacuum cavity therebetween having electron-emitting photocathode is disposed therein. A microchannel plate (MCP) is disposed within the vacuum cavity and defines microchannels extending from an input end to an output end. Each of the microchannels is configured to generate / amplify electrons in response to the electrons received photocathode. The imaging array can include a plurality of metal plates connected to capacitors and configured to collect electrons from the MCP to produce a digital image responsive to electromagnetic radiation received at the first substrate and converted to electrons by the photocathode and multiplied by the MCP.

The invention discloses an axial asymmetric micro-channel plate structure based on an amorphous silicon material and a preparation method of the axial asymmetric micro-channel plate structure. The axial asymmetric micro-channel plate structure comprises a plurality of micro-channels arranged in a penetrating mode in the thickness direction of a device; each micro-channel is provided with an inlet section and an outlet section along the axial direction of the micro-channel plate; the channel geometric parameters of the micro-channels are different on the inlet section and the outlet section; or the equivalent electric fields of the micro-channels are distributed on the inlet section and the outlet section in a different manner; the inlet section of each micro-channel is used for regulating and controlling the initial incidence condition of electrons and the first effective interaction between the inlet section and the inner wall of the channel; collaborative design is carried out on geometrical morphology, electrical characteristics and material characteristics of the microchannels in the axial direction according to different physical stages of the electronic multiplication process corresponding to the structural level of the microchannels. According to the structure, higher controllability and consistency are obtained in the multiplication and transmission process of electrons in the channel on the structural level, and the structural rationality and design flexibility of the micro-channel plate serving as an electron multiplier are improved.

A gain-free microchannel plate two-dimensional framing imaging system, comprising a vacuum drift tube, combined-type long and short magnetic lenses, a gain-free electron beam time amplifier, a gated microchannel plate detector, and a pulse generator, wherein the combined-type long and short magnetic lenses surround the outer side of the vacuum drift tube, the gain-free electron beam time amplifier is located at the incident end of the vacuum drift tube, the gated microchannel plate detector is located at the emergent end of the vacuum drift tube, and the area in the vacuum drift tube between the incident end thereof and the emergent end thereof is an electron drift region.

The utility model provides an anti-blocking micro-channel reactor, relates to the technical field of micro-channel reactors, and solves the technical problem that the stability and the accuracy of the micro-channel reactor are easily influenced by adopting mechanical vibration ultrasound in the existing micro-channel reactor. The plate comprises a plate body, the plate body comprises a micro-channel plate serving as a reaction place and a sealing plate used for sealing the micro-channel plate, the micro-channel plate is provided with a plurality of groups of micro-channel grooves, and the adjacent micro-channel grooves are communicated through a filtering and pressurizing mechanism used for filtering solid impurities and pressurizing. According to the utility model, the filtering and pressurizing mechanism is used for filtering a small amount of solids generated by materials and pressurizing and discharging liquid materials into adjacent micro-channel grooves, so that micro-channels can be effectively prevented from being blocked.

The invention relates to a micro-channel plate surface shape automatic detection system and detection method, and the detection system is characterized in that a lead screw is arranged above a bearing platform, a quartz boat is nested on the lead screw, and the lead screw is connected with a motor; the quartz boat is provided with a clamping groove position for clamping a to-be-measured micro-channel plate, the rotary strip lamp is arranged on one side of the quartz boat and is used for irradiating the to-be-measured micro-channel plate to form projection, and the length of the rotary strip lamp is greater than the maximum size of the appearance of the to-be-measured micro-channel plate; the image acquisition and processing system is arranged on the other side of the quartz boat and is used for acquiring a projection image of the rotary strip-shaped lamp on the to-be-detected micro-channel plate and transmitting the image to the image processing system in real time; the image processing system realizes detection of deformation at different positions through color space transformation, binary analysis, contour analysis, line segment detection, gradient fitting-based accurate edge detection and projection deformation quantity deviation calculation. According to the invention, the detection efficiency and the detection precision are improved, and the micro deformation of the edges of various special-shaped micro-channel plates can be discriminated.

The invention relates to the technical field of neutron imaging and detection, in particular to a data processing method for a neutron imaging detector based on a micro channel plate (MCP), and more particularly relates to a waveform analysis and example reconstruction algorithm for white light neutron resonance imaging. Comprising a waveform analysis step and a case reconstruction step, in the waveform analysis step, an advanced waveform recognition technology is adopted, off-line analysis is carried out on signal waveforms on an anode plate of the neutron imaging detector, and the signal waveform of each electron group is accurately recognized; in the case reconstruction step, the signals are grouped and paired based on a waveform analysis result, and an accurate position reconstruction model is constructed to obtain an accurate coordinate of an electron group hit position; the method not only improves the imaging precision and the counting rate, but also optimizes the data processing flow, adapts to the condition of high counting rate, improves the overall performance of the system, expands the application field, and provides powerful support for the development and application of the neutron imaging technology.

The invention discloses a micro-channel plate cooler for a Stirling engine and a cooling method, and the micro-channel plate cooler for the Stirling engine comprises a cooling shell and a heat exchange core body; the whole heat exchange core body is of an annular columnar structure and is formed by stacking a plurality of gas guide plates and a plurality of heat dissipation plates and then conducting vacuum diffusion welding. Hot fluid enters the hot runner of the air guide plate through the flow guide groove, and cold fluid enters the cold runner of the heat dissipation plate through the water inlet; the hot fluid and the cold fluid exchange heat in the plurality of air guide plates and the plurality of heat dissipation plates; and the hot fluid is discharged from the heat exchange core body through the second airflow groove. According to the micro-channel plate type Stirling engine cooler, the design concept of the micro-channel plate type Stirling engine cooler is adopted, the air guide plates and the heat dissipation plates in the heat exchange core are alternately stacked, the heat exchange area of unit volume can be remarkably increased, the compactness of the cooler structure can be improved, the heat exchange power is improved, and the heat exchange efficiency is improved. And a technical method is provided for stable operation of a next-generation megawatt underwater platform efficient Stirling cycle power system.

The invention relates to the technical field of detection, and discloses an MCP image enhancement high-sensitivity detection system, which comprises a photoelectric cathode, which adopts a multi-quantum well structure and a surface plasma enhancement technology, is used for converting incident photons into primary electrons, and comprises a quantum well formed by gallium arsenide and gallium aluminum arsenide; a microchannel plate for amplifying primary electrons generated from the photocathode; the microchannel plate is coated with a superconducting thin film so as to reduce noise and improve electronic gain; various types of sensors include optical sensors, thermal imaging sensors, acoustic sensors, and chemical sensors. By adopting a multi-quantum well structure and a surface plasma enhanced photoelectric cathode, the spectral response and photoelectric conversion efficiency are remarkably improved, and the sensitivity and response speed of the system to non-specific wavelengths are enhanced. Meanwhile, the microchannel plate coated with the superconducting thin film effectively reduces the noise level, improves the signal definition and the image quality, and solves the high-gain limitation of a traditional system.

Embodiments provide for an ion mass spectrometer. An example ion mass spectrometer includes a laminated collimator, a laminated electrostatic analyzer (ESA) positioned downstream from the laminated collimator, a magnetic sensor analyzer positioned downstream from the laminated ESA, and a position sensitive cross-delay anode (XDL) assembly having a micro-channel plate (MCP) and a cross delay-line (XDL) anode.

A detection apparatus and method for detecting charged particles. The device relies on a detection assembly comprising microchannel plates. The useful surface of the microchannel plate device is maximized in time through the use of beam deflection means upstream of the detection front.

The invention relates to the technical field of heat exchangers, and discloses a corrosion-resistant micro-channel heat exchanger which comprises a water inlet channel, a water outlet channel and a water changing channel, a motor is fixedly connected to the outer wall of the water inlet channel, a water inlet pipe is arranged in the water inlet channel, and a transmission shaft is fixedly arranged at the output end of the motor; the outer wall of the transmission shaft is rotationally connected into the water inlet channel and the water outlet channel, a first spiral piece and a second spiral piece are arranged on the outer wall of the transmission shaft, the first spiral piece is located in the water inlet channel, the second spiral piece is located in the water outlet channel, and the screw pitch of the first spiral piece and the screw pitch of the second spiral piece are gradually increased from top to bottom. Through cooperation of the motor, the transmission shaft, the first spiral piece, the second spiral piece, the first bevel gear, the second bevel gear, the rotating shaft, the water inlet spiral piece and the arc-shaped block, inlet and outlet water can be guided, water flow circulates in different micro-channel plates, local heat nonuniformity is avoided, and the service life of the micro-channel heat exchanger is prolonged.

The present disclosure relates to a flow channel plate, a preparation method thereof and a primary and secondary hydrogen converter, wherein Fe2O3 and / or Fe3O4 are deposited in the first micro-channel of the heat exchange plate by magnetron sputtering, the prepared flow channel plate has a catalyst layer with uniform thickness, and the catalyst layer has strong bonding force with the micro-channel plate material, which can avoid the problems of large heat fluid channel resistance and large hydrogen flow pressure drop caused by uneven catalyst filling thickness, and is conducive to improving the heat exchange efficiency of cold and hot fluids and the primary and secondary hydrogen conversion efficiency, while reducing space occupation.

The invention provides a packaging device and method for packaging a plurality of microchannel plates. The packaging device comprises a base and an upper cover, wherein the base is used for bearing the microchannel plates, and the upper cover is used for pressing the base and sealing a microchannel plate containing area. The base is provided with a plurality of circular grooves which are used for placing the micro-channel plate and supporting the bottom of the micro-channel plate. A plurality of lug grooves are formed in the circular grooves in the circumferential direction and communicate with the circular grooves, and the lug grooves of any two adjacent circular grooves in the transverse direction and / or the longitudinal direction communicate with each other to form a pressing and embedding space when the upper cover is closed. The upper cover is provided with an embedding part which is pressed into the pressing embedding space to press the micro-channel plate. According to the packaging box, the damping effect during impact and vibration in the packaging and transporting process is guaranteed through double complementary type embedded matching, shaking is reduced, and meanwhile the situation that dust in the environment and pollutants generated in the packaging box enter the micro-channel plate containing area, the micro-channel plate is polluted, and consequently the surface cleanliness is reduced is effectively avoided.

The application belongs to the technical field of photon imaging detection, and particularly relates to a photon counting imaging detection system based on a mixed anode. The system comprises a vacuum sealed tube detector composed of a window coated with a photocathode, a microchannel plate stack and a mixed anode, and a signal processing circuit. The photocathode is used for converting photons incident through the window into photoelectrons. The microchannel plate stack is used for converting the photoelectrons into electron clouds. The mixed anode comprises a strip anode and a delay line anode arranged orthogonally, and the mixed anode transmits the collected charge short pulses of each channel to the signal processing circuit. The signal processing circuit calculates the two-dimensional coordinates of the photons based on the collected charge short pulses of each channel, and then transmits the two-dimensional coordinates of the photons to a terminal for imaging display. The application provides a photon counting imaging detection system based on a cross strip-delay line mixed anode, and solves the problem that the existing position sensitive anode detector cannot simultaneously have high spatial resolution and high temporal resolution.

The application provides an X-ray communication device and method based on a laser-driven matrix photocathode. The device is applied to the technical field of X-ray tubes and comprises a laser control circuit, a matrix transmission photocathode array, a collimating microchannel plate, a matrix transmission anode target array, a vacuum tube shell and a beryllium window. The method comprises: generating a dynamic pattern, loading data information to be input into an optical signal; and exciting photoelectron emission with spatial resolution characteristics at a corresponding photocathode pixel area; each channel cluster is aligned with a single photocathode pixel at the front end; after the electrons enter the microchannel, continuous secondary electron emission occurs under the action of the electric field on the inner wall of the channel, and an avalanche effect is generated; and through mechanisms such as bremsstrahlung radiation, a bundle of microfocus X-rays is generated at each target point. In this way, the technical problems of the X-ray source in the prior art, such as the limitation in spatial coding capability, response speed, integration degree and communication dimension, can be solved.

The invention discloses a vacuum and solid integrated lightweight digital solar blind ultraviolet device, which comprises a glass input window, an ultraviolet photocathode, a microchannel plate, a digital readout circuit chip and a ceramic tube shell, the ultraviolet photocathode is attached to the front surface of the glass input window; the ultraviolet photocathode, the micro-channel plate and the digital readout circuit chip are arranged in a vacuum chamber of the ceramic tube shell; the micro-channel plate is positioned right below the ultraviolet photocathode; the digital readout circuit chip is located right below the micro-channel plate, and the device adopts a proximity packaging structure. The device is a high-resolution, integrated and lightweight vacuum digital solar blind device, does not need coupling, is integrated, realizes image digital output, is convenient to use and signal transmission, and is safe and reliable to use.

The invention provides an X-ray communication device and method based on a laser driving matrix type photocathode. The device is applied to the technical field of X-ray tubes and comprises a laser control circuit, a matrix transmission type photocathode array, a collimation type structure micro-channel plate, a matrix transmission type anode target array, a vacuum tube shell and a beryllium window. The method comprises the following steps: generating a dynamic pattern, and loading data information to be input into an optical signal; photoelectron emission with spatial resolution characteristics is excited in a corresponding photocathode pixel area; each channel cluster is aligned with a single photocathode pixel at the front end; after the electrons enter the micro-channel, continuous secondary electron emission occurs under the action of an electric field on the inner wall of the channel, and an avalanche effect is generated; a beam of micro-focus X-rays is generated at each target spot through mechanisms such as tough-induced radiation. In this way, the technical problem that in the prior art, an X-ray source is limited in space coding capacity, response speed, integration degree and communication dimension can be solved.

The invention relates to a three-dimensional uniform-temperature liquid cooling plate, a manufacturing method thereof and a server heat dissipation system. The three-dimensional uniform-temperature type liquid cooling plate comprises a housing, which is internally provided with a sealed cavity and is provided with a cooling liquid inlet and a cooling liquid outlet; the three-dimensional uniform temperature plate is arranged in the sealed cavity of the shell, the three-dimensional uniform temperature plate comprises a bottom plate used for making contact with a heat source and a micro-channel plate which is connected with the bottom plate and extends towards the top face and the at least two side faces of the shell, and therefore a steam cavity internally containing a working medium is defined by the three-dimensional uniform temperature plate and the micro-channel plate; a micro-channel flow channel is formed in the outer side wall of the micro-channel plate; and a flow channel space for cooling liquid to flow is formed between the inner wall of the shell and the outer side wall of the micro-channel plate of the three-dimensional uniform-temperature plate, so that the cooling liquid flowing in from the cooling liquid inlet can flow through the area where the micro-channel flow channel is located, and heat is brought out from the cooling liquid outlet.

This invention discloses a two-phase liquid cooling system combining a drawer-type integrated structure with a flexible cold plate, relating to the fields of thermal management and two-phase liquid cooling technology. It includes a microchannel plate module, in which an internal microchannel network is etched into the flexible cold plate, followed by microchannel processing and surface treatment to generate a microchannel flexible cold plate; a liquid path connection module, which connects the assembled cold plate assembly to the inlet and outlet pipes of the two-phase coolant and includes a liquid path monitor to obtain a liquid path cold plate assembly; and a flow rate balancing module, which, based on the liquid path monitoring data, adjusts the flow rate and local pressure of the two-phase coolant in each microchannel in real time to obtain a balanced cold plate assembly. By embedding the microchannel flexible cold plate into the drawer-type support structure and pressing it tightly together, the system achieves both efficient heat conduction and close contact while maintaining the flexibility of being removable and replaceable, significantly improving assembly reliability and heat exchange efficiency.

The invention discloses a silicon-based micro-channel plate (MCP) structure and a manufacturing method thereof, relates to the technical field of semiconductor device manufacturing, and aims to solve the problems of poor high temperature resistance, insufficient etching precision, film layer quality defect and process synergy deficiency of a traditional glass-based / organic-based MCP. An 8-inch N-type monocrystalline silicon wafer is adopted in the structure, the thickness of the N-type monocrystalline silicon wafer is (250-350) + / -25 microns, micropores of 3-10 microns are evenly distributed, the hole pitch is 7-22 microns, the inclination angle is 6-12 degrees, the side wall roughness is smaller than or equal to 50 nm, the perpendicularity deviation is smaller than or equal to + / -0.5 degrees, an AlO or AlO / HfO / AlO electron multiplication layer with the thickness of 10-30 nm is prepared on the inner wall of a channel through ALD, and a Cr / Ni electrode with the thickness of 50-80 nm is plated on the surface. According to the method, the OES is used for monitoring SiFs in real time. According to the invention, the double targets of < = 30% of 1kg impact fracture rate and stable electron multiplication gain are achieved, the tolerable temperature reaches 800 DEG C, the secondary electron emission efficiency is improved by 25%, the production efficiency is improved by 20%, the cost is reduced by 15%, and the method is suitable for the high-sensitivity detection fields of night vision imaging, particle detection and the like.

The invention discloses a laser speed measuring device. According to the laser speed measurement device, a photoelectric cathode is connected with a micro-channel plate through a vacuum bonding technology, and the photoelectric cathode is used for converting a laser signal into a photoelectronic signal and transmitting the photoelectronic signal to the micro-channel plate; the micro-channel plate is connected with the fluorescent screen through a vacuum bonding technology, and the micro-channel plate is used for carrying out electron multiplication processing on the photoelectron signals and transmitting enhanced electronic signals to the fluorescent screen; the fluorescent screen is connected with the nano optical fiber taper coupling structure through a vacuum bonding technology, and the fluorescent screen is used for sending a visible light signal to the nano optical fiber taper coupling structure; the nano optical fiber taper coupling structure is connected with the CCD chip, and the nano optical fiber taper coupling structure is used for transmitting the visible light signal to the CCD chip; the CCD chip is used for receiving the visible light signal, converting the visible light signal into a digital signal and transmitting the digital signal to the control module so as to determine speed data of the laser signal according to the digital signal. According to the invention, the transmission efficiency of the laser signal is improved, and the determination precision of the speed data of the laser signal is improved.