20 results about "Vacuum level" patented technology

The invention discloses a method for improving corrosion resistance of a pure aluminum surface in a NaCl solution, and relates to the technical field of high-current pulsed ion beams, an experiment is carried out on a TEMP-6 type HIPIB device, and a polymer anode unipolar pulse mode external magnetic insulation ion diode is adopted to generate 70% C and 30% H ion beams for an irradiation experiment; the ion beam parameters are as follows: the acceleration voltage is 300kV, the pulse width is 70-80ns, the beam density is 100A / cm < 2 >, the irradiation frequency is five times, and the background vacuum degree of a vacuum chamber during irradiation is 10 <-3 > Pa.

This invention provides a MEMS packaging structure, including a first substrate and a second substrate. The second substrate and the first substrate are bonded together at a predetermined distance to seal the bonding area into a closed microvacuum cavity. A microvacuum gauge is disposed inside the closed microvacuum cavity to monitor the vacuum level inside the cavity. By incorporating a microvacuum gauge within the MEMS packaging structure, the vacuum level inside the vacuum cavity where the MEMS sensor is located can be monitored in real time and in situ. This allows for determination of whether the vacuum level inside the cavity is within the range required for normal operation of the MEMS sensor, providing timely early warning and enabling appropriate countermeasures to be taken promptly to ensure the continuous and normal operation of the sensor.

This invention provides a quantum current combined measurement device and method based on high-precision vacuum pressure control. The device includes: a vacuum chamber; a vacuum pump connected to the vacuum chamber; a vacuum pressure control component connected to the vacuum chamber; a high-current measurement component disposed within the high-current chamber; and a low-current measurement component disposed within the vacuum chamber. This invention regulates the vacuum level within the vacuum chamber through the vacuum pressure control component. When measuring extremely weak currents in a single electron stage, the vacuum level is reduced, and the signal is guided and collected by the low-current measurement component, enabling signal ion multiplication detection. When the current increases to the nanoampere level or above, the vacuum level is increased, switching to the high-current measurement component for direct charge collection measurement. This quantum current combined measurement device uses vacuum level as a key control variable, integrating the high sensitivity of the low-current measurement component to weak signals with the high-precision measurement capability of the high-current measurement component to strong signals into a single system.

This invention proposes a gas testing device and method simulating a low-temperature vacuum environment. The device includes a vacuum pump unit, a cold trap test chamber unit, an inlet unit, a testing unit, and a monitoring unit. The vacuum pump unit first evacuates and maintains a low vacuum to remove water vapor from the cold trap test chamber unit. Then, the cold trap is activated to cool the interior of the cold trap test chamber unit. This process ensures good heat transfer, maintaining a uniform temperature throughout the unit and preventing icing, thus improving testing accuracy. Once the internal temperature reaches a specific level (required for gas testing), the vacuum pump unit evacuates to a specific vacuum level (required for gas testing). Finally, the gas to be tested (such as H2S) is introduced, enabling precise measurement of the gas parameters under low-temperature vacuum conditions.

This invention provides a coaxial field emission cathode (FET) based filament additive manufacturing equipment, comprising a coaxial FET electron gun, a three-dimensional motion platform, and a control system disposed in a vacuum chamber. The FET electron gun is positioned above the three-dimensional motion platform, with its outlet facing the forming substrate on the platform. The control system is connected to the vacuum chamber, the FET electron gun, and the three-dimensional motion platform to control the filament feed rate, emission current, and beam size of the FET electron gun, as well as the direction of motion of the three-dimensional motion platform and the vacuum level in the vacuum chamber. The additive manufacturing equipment of this invention has a simple structure, is easy to control, and produces high-quality formed parts.

1. Name of the product in this design: Vacuum Gauge (Pirani Diffused Silicon). 2. Purpose of this design: Primarily used for real-time monitoring of vacuum levels in enclosed spaces. 3. The key design features of this product are the combination of shape and pattern. 4. The image or photograph that best illustrates the design's key features: the front view.

This invention relates to the field of ion accelerators, and more particularly to an electron cooling vacuum system for ion accelerators and a method for obtaining vacuum. The vacuum system includes two irregularly shaped vacuum chambers, two racetrack-shaped vacuum chambers, two vacuum chamber devices, a vacuum pipeline device, two electrostatic deflection plates, two first vacuum chambers, an electron gun vacuum chamber, and a collector vacuum chamber. The electron cooling vacuum system for ion accelerators provided by this invention, through the cooperation of a pentagonal alloy getter film, a titanium sublimation film, and NEG components, can effectively remove reactive gases and stably maintain a vacuum level of less than 1 × 10⁻⁶ within a vacuum pipeline device up to 8 m long. ‑9 The extremely high vacuum level of Pa significantly improves the beam lifetime. Because the shape of the irregular vacuum chamber is adapted to the shape of the internal space of the magnet, it not only meets the requirements of beam dynamics for magnetic field uniformity, but also realizes the pumping function in an extremely narrow physical space, solving the problem of not being able to install a large pump in a small space.

This utility model relates to a glass vacuum gauge for accurately detecting vacuum levels in an ion implanter, belonging to the field of instrumentation technology. The vacuum gauge includes a housing that is connected to the vacuum chamber of the ion implanter via a sealing assembly. Inside the housing are a base, a tungsten wire, a spiral coil, a probe, and corresponding fixing components. The probe directly senses changes in vacuum levels, while the tungsten wire, acting as a heating element, affects the resistance of the spiral coil. By detecting changes in the spiral coil's resistance, the vacuum level can be accurately calculated. This utility model can accurately and without delay transmit the pressure signal within the vacuum chamber to the monitoring system. Simultaneously, it acts as a physical barrier to isolate the ultra-high vacuum interior from the external atmosphere, preventing gas leakage. It also provides stable electrical insulation and robust mechanical support, making it suitable for vacuum monitoring in critical areas of high-vacuum systems in medium-to-high-energy ion implanters.

The invention discloses a miniaturized vacuum system for an atomic gravity gradiometer, which comprises an upper vacuum cavity, an upper getter I, an upper getter II, an ion pump I, an ion pump II, an upper copper pipe, an upper atomic source, a lower vacuum cavity, a lower getter I, a lower getter II, a lower copper pipe and a lower atomic source, the vacuum system can be divided into an upper atom trapping area, an upper interference area, an upper detection area, a cavity connecting area, a lower atom trapping area, a lower interference area and a lower detection area according to functional area division, and the upper detection area and the lower detection area are each provided with at least one detection window used for detecting the number of atoms. The mode of combining the getter and the ion pump is adopted to replace a large-size combination pump, the size of the vacuum system of the atomic gravity gradiometer is remarkably reduced, meanwhile, by reasonably distributing the positions of the pump sets, the vacuum degree consistency of the upper cavity and the lower cavity is effectively improved, the common-mode rejection effect of the atomic gravity gradiometer is enhanced, and the gravity gradient measurement precision is improved.

This invention relates to the field of metal smelting technology and discloses a method and system for ingot receiving during interrupted EB furnace smelting. The method includes: monitoring the EB furnace smelting process to determine if smelting has been interrupted; increasing the current of the remaining second-part electron guns in response to an interruption in the crystallization zone of the EB furnace; increasing the current of the first-part electron guns based on images captured by a camera in response to troubleshooting the first-part electron guns; monitoring the ingot receiving status in real time; and adjusting the current of the second-part electron guns to the smelting state in response to ingot receiving completion. The solution of this invention monitors the EB furnace smelting process and, when the first-part electron gun is interrupted, increases the current of the second-part electron guns to maintain the ingot temperature and the vacuum level of the EB furnace. After troubleshooting, the current of each electron gun is adjusted to resume the EB furnace smelting process, thereby improving the ingot receiving success rate while ensuring product quality and reducing material waste.

This application relates to a vacuum monitoring structure for monitoring the vacuum level within a vacuum chamber. The vacuum monitoring structure includes: a tube; a flexible sealing membrane connected in a sealed manner to one end of the tube; an observation cover covering the other end of the tube, the observation cover having an extraction port, and the observation cover being partially or entirely made of transparent material, allowing the flexible sealing membrane to be observed from the outside; and a sealing structure for sealing the extraction port. The vacuum chamber includes a chamber wall, the outer surface of the tube is used for a sealed connection with the chamber wall, one end of the tube is disposed within the vacuum chamber, and the observation cover is used for a sealed connection with the chamber wall. This application allows direct observation of the deformation of the flexible sealing membrane through the observation cover, thereby determining the air pressure within the vacuum chamber.

The utility model provides a range-adjustable vacuum gauge, which relates to the field of vacuum gauges and comprises a protective shell, the top of the protective shell is provided with a shell cover, and the inner wall of the protective shell is fixedly connected with a first electromagnetic shielding sheet; the electromagnetic valve is controlled by the microcontroller, the through pipe can be switched on and off, the vacuum degree of the environment can be monitored in cooperation with the vacuum sensor, external electromagnetic interference is effectively shielded through the contact design of the first electromagnetic shielding sheet and the second electromagnetic shielding sheet, the accuracy and stability of vacuum measurement are improved, and the working efficiency is improved. Furthermore, the temperature in the protective shell can be monitored in real time through the temperature sensor, and the work of the electric heating tube is controlled through the microcontroller, so that the temperature in the protective shell is adjusted, the vacuum sensor is ensured to operate at the optimal working temperature, and the service life of the vacuum sensor is prolonged. Therefore, while the measurement precision and reliability are improved, the equipment can be suitable for being used in a low-temperature environment, and the application range of the equipment is effectively widened.

This utility model discloses a cavity high vacuum maintaining device, belonging to the technical field of helium leak detection testing equipment. It includes an outer frame, a sealing plate, a first cylinder, a sealing assembly, a connecting frame, and a sealed cavity. The outer frame is located at one end of the connecting frame, and the sealing plate is slidably connected to the outer frame. A sealing assembly is installed on the sealing plate. The first cylinder is installed on the outer wall of the outer frame, with its bottom extending through the upper end of the connecting frame and connecting to the upper part of the sealing plate. The sealed cavity is installed within the connecting frame. This invention solves the problem in existing technologies where the single-layer seal leads to a decrease in vacuum level, interference with helium signals, and affects detection accuracy and reliability. It significantly improves the vacuum cavity's ability to maintain a high vacuum level, providing a performance foundation for high-precision detection technologies such as helium detection that are extremely sensitive to vacuum environments.

The utility model belongs to the technical field of solar energy, and particularly relates to an improved heat pipe type vacuum heat collecting pipe which comprises a transparent shell, a shell supporting frame, a heat collecting outer pipe, a heat collecting inner pipe and a turbulent flow pipe. A vacuum layer is arranged between the heat collection outer pipe and the heat collection inner pipe. And a selective absorbing coating is arranged on the outer wall of the heat collecting inner tube. And a getter is arranged in the vacuum layer. And a medium outlet is formed in the other end of the heat collection inner pipe. According to the improved heat pipe type vacuum heat collecting pipe, by arranging the turbulent flow pipe, disturbance of a heat transfer medium in the pipe is enhanced, the heat exchange efficiency is improved, solar radiation energy can be more sufficiently absorbed through the high-performance selective absorption coating, heat loss is reduced, the high vacuum degree of the vacuum layer is effectively maintained through the arrangement of the getter, and the service life of the vacuum layer is prolonged. And the overall structural design is reasonable, the heat exchange effect of the vacuum heat collecting pipe can be remarkably improved, and the utilization efficiency of solar energy is improved.

This invention discloses a NiTi shape memory alloy with strong crystallographic texture and its preparation method, belonging to the field of NiTi shape memory alloys. The method includes: mounting nearly atomically equal NiTi polycrystalline rods in an electron beam levitation zone melting furnace, evacuating to a target vacuum level; increasing the filament current to a set current, and increasing the electron gun power until a molten zone appears and stabilizes; performing zone melting from bottom to top with the electron gun at a set zone melting rate; and cooling to room temperature after melting to obtain a polycrystalline NiTi shape memory alloy with a [001] orientation texture. This invention employs electron beam levitation zone melting technology, which is simple to operate, has high material utilization, and produces a NiTi alloy with high purity, strong texture, and excellent superelastic recovery performance.

This invention discloses a magnetic liquid level measurement and calibration device and method. The device includes a slide table, a sealed housing, a camera, and a laser displacement sensor. Two sealed housings are arranged opposite each other, each with a magnetic ring at one end. A magnetic liquid ring is placed between the two magnetic rings. The slide table is mounted on a base plate, and both sealed housings are connected to the slide table to allow for adjustable distance between the magnetic rings. The camera is tangentially aligned with the outer surface of the magnetic liquid ring in a certain direction, and the laser displacement sensor is radially aligned with the outer surface of the magnetic liquid ring in the same direction. A vacuum component is connected to the sealed housing to change the vacuum level within it. This invention can correct the liquid level contour line acquired by the laser displacement sensor based on the outer contour boundary image acquired by the camera, and establish a correspondence between the liquid level contour lines acquired by the laser displacement sensor under different curvatures and inclinations and the actual liquid level contour lines of the magnetic liquid.

This invention discloses a space-simulated environment variable-temperature photothermal performance testing device based on steady-state calorimetry: the outer layer of the experimental chamber is a vacuum chamber, and the inner layer is a cryogenic chamber, with gas communication between the vacuum chamber and the cryogenic chamber; before testing, the cryogenic chamber is cooled by a cooling device, and the interior of the experimental chamber is evacuated to a vacuum state by a suction device, so that the interior of the experimental chamber meets the testing environment. A sample installation and adjustment unit is used to install and fix the sample to be tested in the cryogenic chamber. A temperature control unit is used to change the temperature of the sample to be tested. A solar radiation simulation unit is used to simulate sunlight irradiation. When the sample to be tested reaches the preset temperature, the data processing unit records the corresponding vacuum level and the output power of the temperature control unit, and calculates the emissivity of the sample to be tested by combining parameters such as the temperature inside the cryogenic chamber and the radiative area of ​​the sample. This invention achieves continuous and simultaneous measurement of full-spectrum hemispherical infrared emissivity and solar absorptivity from 150K to 450K, with a large temperature range and high measurement accuracy.

This invention discloses a bypass wire feeding additive manufacturing system based on a field emission cathode, comprising an electron gun employing a field emission bulk cathode disposed in a vacuum chamber, a forming substrate disposed at the electron beam exit direction of the electron gun, a wire feeder disposed between the electron gun and the forming substrate, the wire feeder being fixed to the side wall of the vacuum chamber, the electron gun being connected to an electron gun control system for controlling the electron gun's opening and closing, beam current adjustment, electron beam focusing, deflection, and astigmatism correction functions, the wire feeder being connected to the wire feeding control system for bypassing and feeding metal wire onto the forming substrate, the forming substrate being connected to a motion control system for controlling the movement direction of the forming substrate, and the vacuum chamber being connected to a vacuum control system for controlling the vacuum level of the vacuum chamber. This invention uses a field emission cathode to avoid changes in the magnetic field around the electron gun caused by cathode heating, thus avoiding the need for additional heating and cooling equipment and helping to reduce the complexity of the equipment structure and control system.

Provided are a leakage inspection method and a leakage inspection device which are capable of automatically inspecting air leakage in a plurality of objects to be inspected. The leakage inspection method for inspecting air leakage in an object to be inspected that has an internal space decompressed to a predetermined vacuum level and hermetically sealed includes: a moving step for moving, to a predetermined measurement position, an optical measurement unit which projects excitation light from the outside of the internal space to a pressure-sensitive paint, provided in the internal space and having a light emission intensity that changes with the oxygen concentration in the internal space, and detects light from the pressure-sensitive paint to which the light is projected; a light projection step for projecting the excitation light to the pressure-sensitive paint; a search step for finding a detection position at which the light from the pressure-sensitive paint is brightest; a measurement step for measuring the attenuation rate of the light emission intensity at the detection position; and a determination step for determining the presence or absence of air leakage in the object to be inspected on the basis of the attenuation rate.

To provide a method for electrochemical treatment of electrodes that can be carried out simply and effectively. [Solution] The vacuum level detection method of the present invention detects the vacuum level of a vacuum interrupter (11) having a fixed electrode (22) and a movable electrode (23) inside the vacuum container (21). The method includes an arc generation step S0, S1 in which a DC voltage is applied to the vacuum interrupter from a DC power supply and an arc (A) is generated by opening the electrodes to separate them; a measurement step S2 in which an arc maintenance voltage is measured while maintaining the arc generation from the arc generation step; and a detection step S3 in which the vacuum level is detected based on the arc maintenance voltage measured in the measurement step and master data of the vacuum level.