107 results about "Anion Pumps" patented technology

The invention discloses a p-type or n-type COF film, the film thickness is 50 nm to 5 m, the aperture is 0.7 nm to 4 nm, and the film has a regular pore channel structure and light response performance. According to the invention, proper monomers are selected, and liquid-solid interface polymerization reaction is carried out, so that COF membranes grow along the tube wall, and p-type and n-type COF membranes are respectively prepared. The growth direction of the film is inconsistent with the transmission direction of the monomer and the catalyst, and the process can effectively promote the dissolution growth and self-repair of the COF film, so that the crystallinity and stacking orientation of the film are improved, and the structural characteristics of the COF film are optimized. The obtained COF film has a remarkable advantage of light-driven ion pump performance. The obtained COF membrane is used for preparing a desalting device.

The invention discloses an ion pump power supply circuit. The circuit comprises a voltage regulation output module, a control module and a current-voltage conversion module, the input end of the voltage regulation output module receives low-voltage direct-current input voltage; the high-voltage output end of the voltage regulation output module is connected with the anode of the ion pump; the ion pump shell is electrically connected with the input end of the current and voltage conversion module through the electron gun shell; the output end of the current-voltage conversion module is electrically connected with the control module; the grounding end of the current-voltage conversion module is connected with the signal ground; the voltage regulation output module converts the low-voltage direct-current input voltage and outputs high-voltage direct-current voltage to the anode of the ion pump, so that working current is generated in the cavity of the ion pump and returns to the current-voltage conversion module through the shell of the ion pump and the shell of the electron gun; the current and voltage conversion module detects working current in the ion pump cavity and converts the working current into a voltage signal; and the control module determines the vacuum degree in the ion pump cavity according to the voltage signal.

The invention discloses a compact accelerator extremely-high vacuum system and an implementation method thereof. The compact accelerator extremely-high vacuum system comprises a dipole iron vacuum chamber, a BUMP iron vacuum chamber, a BPM cavity, a vacuum pump chamber and a quadrupole iron vacuum chamber which are sequentially connected to form a beam main line. A plurality of non-evaporable getter sheets are arranged in the dipole iron vacuum chamber and the quadrupole iron vacuum chamber in an array manner and are used for extracting active gas in a beam main line to obtain extremely high vacuum; a vacuum measuring gauge tube, a sputtering ion pump, a molecular pump and a gate valve are installed on the vacuum pump chamber, the vacuum measuring gauge tube is used for measuring the vacuum degree in the beam main line, the sputtering ion pump is used for extracting argon and methane in the beam main line and conducting baking, and the molecular pump is used for rough extraction of the beam main line and exhaust in the baking process; the gate valve is used for separating the molecular pump from the beam main line. According to the invention, hydrogen, carbon monoxide and other active gases in the system can be extracted under the condition that a titanium sublimation pump cannot be installed due to insufficient space, so that extremely high vacuum can be obtained.

The invention discloses a wide-temperature-range ultrahigh vacuum system gas component testing device and method, the device comprises an inner vacuum cavity, an outer vacuum cavity, a sample supporting plate, a quadrupole mass spectrometer, a vacuum system, a vacuum coupling sample transfer rod and a control device, the outer vacuum cavity is used for loading, unloading and transferring a sample, and the inner vacuum cavity is used for maintaining and testing the ultrahigh vacuum system. The vacuum system adopts a mechanical pump, a molecular pump, an ion pump and other multi-stage vacuum pumps to vacuumize, and adopts multiple groups of vacuum gauges to measure different vacuum degrees. A quadrupole mass spectrometer is adopted to analyze and detect gas components generated by the parts.

The invention relates to the technical field of atomic frequency standards, in particular to a rubidium cold atom gas chamber-based two-photon transition optical frequency standard device, which comprises a two-photon transition clock laser system, a rubidium cold atom gas chamber, a cooling laser system, a sputtering ion pump and a rubidium source, wherein the two-photon transition clock laser system comprises a laser generation modulation light path, a laser power stabilization light path and a laser frequency control light path; the rubidium cold atom gas chamber is arranged behind the Glan-Taylor prism; the cooling laser system comprises a cooling laser, a second isolator, a second polarization beam splitter, a pumping light path, a re-pumping light path and a detection light path; the sputtering ion pump is connected with the rubidium cold atom gas chamber; and the rubidium source is connected with the rubidium cold atom gas chamber. The two lasers are utilized to obtain the two-photon transition signal, so that the rubidium atom two-photon transition light frequency standard with high stability is obtained, and the intensity of the two-photon transition fluorescence signal is improved.

The present application relates to a kind of device for accurately adjusting the trajectory of atomic transverse motion, including bellows, first threaded rod, second threaded rod, third threaded rod, first piezoelectric ceramic, second piezoelectric ceramic, third piezoelectric ceramic, piezoelectric ceramic drive, atom source cavity, interference cavity, detection cavity, atom source, upper raman light, first 1 / 4 wave plate, first 0 ° mirror, lower raman light, front raman light, second 1 / 4 wave plate, second 0 ° mirror, rear raman light, upper detection light, third 0 ° mirror, lower detection light, fluorescence collection device, photodetector, ion pump, vacuum pipeline, adapter flange, signal acquisition device and computer.The present application can realize the precise adjustment of the trajectory of atomic motion without affecting the parameters of atom itself.

The present invention discloses a method for preparing a biomimetic photosynthetic membrane and a light-enhanced ion pump effect, belonging to the technical field of biomimetic photosynthetic membranes. The present invention uses a solution immersion method to immerse pyrrole monomers into the pores of a MOF porous material; a chemical oxidation method is used to oxidize the pyrrole monomers to a polypyrrole conductive polymer PPy, thereby constructing a PPy / MOF heterogeneous membrane composite of PPy and a MOF porous material; subsequently, a TiO2 nanolayer is modified on the surface of the PPy / MOF heterogeneous membrane by a spin coating method to construct a PPy / MOF / TiO2 heterogeneous membrane, i.e., a biomimetic photosynthetic membrane. The present invention compounds different light-responsive molecules to promote the transfer of photogenerated electrons, inhibit electron-hole recombination, and achieve the light-enhanced ion pump effect of the biomimetic photosynthetic membrane. The PPy / MIL-101(Cr) / TiO2 heterogeneous membrane of the present invention can be used to manufacture optical components, systems or instruments due to its excellent light response performance, high electron-hole separation efficiency and photoelectric conversion efficiency, and strong ion pump effect.

This invention belongs to the field of ultra-high vacuum ion pumps, specifically a portable high-voltage power supply device and implementation method suitable for a novel ultra-high vacuum ion pump. The device includes: a portable power supply unit, a master control switch unit, a DC-DC converter unit, a high-voltage output unit, a voltage / current processing unit, and a portable high-voltage power supply housing unit. The portable power supply unit supplies power to the entire portable high-voltage power supply device; the master control switch unit controls the start and stop of the high-voltage power output; the DC-DC converter unit boosts the input voltage to provide power for the ion pump; the high-voltage output unit delivers the high-voltage power to the ion pump via a high-voltage cable, ensuring stable operation; the voltage processing unit displays the current voltage / current parameters output by the ion pump; and the portable high-voltage power supply housing unit is used for installation, operation, and fixation of the device.

The invention relates to the field of getter pumps, and discloses a composite getter pump which comprises a getter pump part and an ion pump part which share the same shell. The getter pump part comprises a getter pump core arranged in the air suction cavity of the shell; the ion pump part comprises an anode barrel, a pair of magnets, a pair of cathode plates, a pair of bottom plates and shielding iron; the anode barrel is arranged in the shell and is electrically connected with an electrode arranged on the shell; the pair of magnets, the pair of cathode plates, the pair of bottom plates and the shielding iron are arranged on the periphery of the anode barrel to form an ion pump air exhaust cavity; and the air suction cavity is communicated with the ion pump air exhaust cavity. The structure is compact, the integration degree is high, and the size and the weight are obviously reduced.

This application relates to the field of field emission scanning electron microscopy (FET) technology, and in particular to an electron microscope gun valve. The electron microscope gun valve includes a valve seat and a second control valve disposed on the valve seat. The valve seat is sealed between the gun lens and the objective lens; the valve seat has a gas passage, including a first channel connecting to a molecular pump, a second channel connecting to an ion pump, and a third channel connecting to the gun lens, all three being interconnected. The second control valve can close the first channel to cut off its connection with the other two channels. Therefore, with the electron microscope gun valve of this application, which includes a gas passage and a second control valve, the molecular pump can be used to evacuate the microscope barrel and the ion pump first, allowing the ion pump to quickly reach the starting conditions before starting, thus avoiding forced start-up of the ion pump before the starting conditions are met, which would affect its service life, and effectively improving the efficiency of vacuum establishment in the microscope barrel.

A device (100) configured as an inline pump, in particular as an inline vacuum pump, further in particular as an inline ion pump, is described, the device (100) comprising: i) a housing (110) defining a central opening (115), in particular a central channel, for in-line operation of the device (100); and ii) a tempering device (120) coupled to the housing (110) and configured to provide tempering with respect to inline operation.

The utility model discloses an ion pump power supply protection structure, and relates to the technical field of power supply protection structures. The power supply box comprises a box body, the top of the box body is detachably connected with a box cover, two movable blocks are arranged in the box body in a relatively sliding mode, a cavity used for installing a power supply body is defined between the two movable blocks, two sets of clamping mechanisms used for driving the two movable blocks to move relatively are oppositely arranged in the box body, and each clamping mechanism comprises a fixing rod. The fixing rod is fixedly connected into the box body, two lantern rings are oppositely arranged on the fixing rod in a sleeving and sliding mode, a first spring is fixedly connected between the two lantern rings, the fixing rod is sleeved with the first spring, the center positions of the two connecting rods are oppositely crossed and rotationally connected, the first ends of the two connecting rods are hinged to the two lantern rings respectively, and the second ends of the two connecting rods are hinged to the two lantern rings respectively. The second ends of the two connecting rods are hinged to the movable block. According to the utility model, the power supply bodies with different sizes can be fixed through the clamping mechanism, so that the universality of the device is improved.

The utility model relates to a cloth material receiving device of anti - collapse, including frame, be located in the output of frame and be located in the receiving frame of the lower part of the discharge roller, be equipped with swing device between the discharge roller and receiving frame, and the output of this swing device is equipped with the discharge port of hollow structure, the inside wall symmetry of both sides of discharge port installs static electricity removal device, the interval between two static electricity removal devices is adjustable, and the interval of cloth surface and static electricity removal device after adjusting is less than or equal to 2cm, static electricity removal device contains the static electricity stick of length more than cloth width and the ion pump of power supply for it, the utility model solves the problem that the cloth of traditional material receiving device is easy to stack and collapse, and can remove the static electricity on the cloth surface at the same time.

The invention discloses a circuit and a method for high-precision sampling of nanoamp-level micro-current. The circuit comprises a diode sampling unit, a parallel resistance-capacitance unit, an impedance matching unit, a differential amplification unit and a micro-current display unit, the sampling unit is composed of two diodes which are reversely connected in parallel, one end of the sampling unit is connected with a micro-current signal source to be sampled, and the other end of the sampling unit is grounded; the parallel resistance-capacitance unit is connected to two ends of the diode sampling unit in parallel; the impedance matching unit comprises two voltage followers, the input ends of the voltage followers are respectively connected to the two ends of the sampling unit, and the output ends of the two voltage followers are respectively connected to the input end of the differential amplification unit; the differential amplification unit adopts a differential amplification circuit based on a symmetric equal-length wiring principle as a secondary amplification processing unit; the output end of the differential amplification unit is connected to the display unit. According to the invention, full-range high-precision coverage from nA to mA is realized, and the technical problem of wide-range current sampling in the ion pump power supply controller is solved.

The invention discloses an ion pump power supply circuit. The circuit comprises a battery pack, a voltage adjusting module, a beam detection module, a switching control module and a battery mode switching module, the output end of the battery pack is electrically connected with the input end of the voltage adjusting module; the high-voltage output end of the voltage adjusting module is connected with the cathode of the ion pump; the output return end of the voltage adjusting module is electrically connected with the first input end of the beam detection module. The anode of the ion pump is electrically connected with the second input end of the beam detection module; the output end of the beam detection module is electrically connected with the input end of the switching control module; the output end of the switching control module is electrically connected with the input end of the battery pack through the battery mode switching module; the beam current detection module detects the working current in the ion pump cavity; the switching control module is used for outputting a control signal to the battery mode switching module according to the size so as to switch the battery pack to a corresponding mode and output a corresponding voltage; the voltage adjusting module boosts and adjusts the voltage and outputs the voltage to the ion pump.

The invention discloses a method and a system for detecting weak signals and harmonic waves based on stochastic resonance of compression enhancement. The system comprises a vacuum system, an imprisoned field, a laser system, a fluorescence acquisition system and an external signal, the vacuum system comprises a vacuum cavity, an ion pump and a getter pump, and a calcium atom furnace and a surface electrode ion trap for trapping calcium ions are placed in the vacuum cavity; the trapping field comprises a radio frequency trapping field and a direct current trapping field, and the radio frequency trapping field is composed of a radio frequency signal source, a power amplifier and a spiral resonant cavity; the direct-current trapping field comprises a direct-current high-voltage power supply, a 6733 board card and an amplification chip. The fluorescence acquisition system comprises an imaging mirror, a CCD (Charge Coupled Device) camera and a photomultiplier; the external signal comprises a driving signal, a compression signal and a to-be-tested signal. According to the method, the compressed signal is used for replacing external random noise, ions are triggered to generate periodic phase change along with the to-be-detected signal, the to-be-detected signal is optimally matched with the bistable system by changing the strength of the compressed signal, and the signal-to-noise ratio and harmonic detection are improved to the maximum extent.

The invention discloses a semiconductor high-precision detection system capable of reducing vibration. The system comprises a closed chamber; the sample preparation chamber is connected with the side wall of the closed chamber, the sample preparation chamber is connected with a molecular pump, and a vacuum valve is arranged at the joint of the closed chamber and the sample preparation chamber; the ion pump is connected with the closed chamber; the electron microscope detection system is arranged at the top in the closed cavity; and the magnetic shielding shield is arranged in the closed cavity and is arranged on the ion pump side. A high-vacuum air extractor of the main cavity is replaced by the ion pump without a moving part from a mechanical rotary molecular pump, the molecular pump is used for enabling the system to reach the specified vacuum degree, and the ion pump is used for independently extracting air, so that the vacuum degree of the main cavity can be improved while a mechanical vibration source is fundamentally eliminated.

The invention discloses an integrated cold atom gravity measurement system based on a grating magneto-optical trap chip. The system mainly comprises an ion pump, a metal vacuum cavity, a transparent ultrahigh vacuum cavity, the grating magneto-optical trap chip, a chip fixing frame, an atom source and a matched light path assembly. In order to solve the problems that an existing three-dimensional magneto-optical trap system is complex in structure and low in integration level, a plane grating magneto-optical trap chip is introduced, the system configuration is effectively simplified, the space utilization rate is improved, and the atom capturing efficiency and purity are remarkably improved. The system has obvious advantages in atomic control performance and integration degree, specifically, efficient cooling and capturing, low power consumption, low noise and good detection performance, and an advanced solution is provided for realizing high-precision and miniaturized gravity measurement.

The application relates to the technical field of accelerator control, in particular to a focusing coil control system of an accelerator, which comprises a front-end ion pump acquisition module, a tail-end ion pump acquisition module and a processing module. The front-end ion pump acquisition module is used for acquiring a first ion pump current value of the front-end ion pump; the tail-end ion pump acquisition module is used for acquiring a second ion pump current value of the tail-end ion pump; the processing module is used for generating a group of coil control parameters according to the first ion pump current value and the second ion pump current value; and a plurality of coil control modules are used for respectively adjusting the coil current of each focusing coil according to the coil control parameters, so that the first ion pump current value and the second ion pump current value are minimized. The beneficial effect is that the coil control parameters of the focusing coil are automatically changed according to the running current by the processing device, so that the running current of the ion pump is minimized, the rapid debugging of the focusing coil of the accelerator is realized based on the above process, and the optimal beam distribution is realized.

The partitioned storage device comprises a box body, a heat preservation layer, a dryer, a vacuum ion pump, a plurality of cooling openings, a lighting lamp and a plurality of storage mechanisms, the heat preservation layer is arranged in the box body, and the storage mechanisms are oppositely arranged at the left end and the right end in the box body; the vacuum ion pump is arranged in the middle of the multiple storage mechanisms, the dryer is arranged above the vacuum ion pump, each cooling opening is formed above the corresponding storage mechanism, and the illuminating lamp is arranged above the dryer. According to the scheme, the storage capacity is greatly improved, and meanwhile all gas can be pumped away more thoroughly during vacuum treatment.

The utility model discloses over-temperature protection equipment for a power supply of an ion pump, and relates to the technical field of power supply protection equipment. The power supply box comprises a box body, the top of the box body is detachably connected with a box cover, a mounting groove used for mounting a power supply body is formed in the box body through heat conducting plates and fixing plates which are oppositely arranged in pairs, a plurality of partition plates which are oppositely arranged in a staggered mode are fixedly connected between the fixing plates and the box body, and a serpentine channel is formed between the box body and the fixing plates through the partition plates. Through holes communicating with the mounting grooves are formed in the fixing plate between the adjacent partition plates in a penetrating mode, the cooling fan is fixedly connected into the box body, an air outlet of the cooling fan faces a serpentine channel formed between the partition plates and the fixing plate, and first cooling holes are formed in the two ends of the box body in a penetrating mode. According to the utility model, air is accelerated to flow in the serpentine channel through the cooling fan, and heat flow generated by the power supply body is taken away through the through holes, so that heat dissipation is realized, the temperature of the power supply body is prevented from being too high, and the heat dissipation efficiency of the power supply body is greatly improved.

The invention relates to an optimization method of a proton accelerator vacuum system based on a local large model, and relates to the technical field of accelerator vacuum systems. The method comprises the following steps: deploying a large model on a local server; a vacuum system is established, the vacuum system comprises multiple sets of ion pumps and multiple vacuum gauges, and the vacuum gauges are arranged between the ion pumps; after the vacuum system is stable, vacuum degree parameters of the multiple ion pumps and vacuum degree parameters of the vacuum gauge are collected and stored locally; training the large model based on the collected data so as to establish a mapping relation between the operation parameters of the ion pump and the readings of the vacuum gauge, and presetting a performance threshold value; and when the error between the vacuum degree reading of the ion pump output by the large model and the vacuum degree reading of the vacuum gauge is smaller than a preset performance threshold value, reducing the number of the vacuum gauges in the vacuum system. The method has the effect of effectively reducing the hardware cost of the vacuum system of the proton treatment accelerator on the premise of ensuring the data security and the system reliability.

The application discloses a method and system for detecting weak signals and harmonics based on compression-enhanced stochastic resonance, comprising a vacuum system, a trapped field, a laser system, a fluorescence collection system and an external signal; the vacuum system comprises a vacuum cavity, an ion pump and a suction pump, a calcium atom furnace and a surface electrode ion trap for trapping calcium ions are arranged in the vacuum cavity; the trapped field comprises a radio frequency trapped field and a direct current trapped field, the radio frequency trapped field is composed of a radio frequency signal source, a power amplifier and a spiral resonant cavity; the direct current trapped field comprises a direct current high-voltage power supply, a 6733 board card and an amplification chip; the fluorescence collection system comprises an imaging mirror, a CCD camera and a photomultiplier tube; the external signal comprises a driving signal, a compression signal and a signal to be detected. The application uses the compression signal to replace the external random noise, triggers the ion to have periodic phase change with the signal to be detected, changes the intensity of the compression signal, makes the signal to be detected and the bistable system reach the best matching, and maximizes the signal-to-noise ratio and the detection of harmonics.

The invention discloses an ion pump suitable for a weightlessness condition and a baking regeneration method of the ion pump, and belongs to the technical field of vacuum obtaining equipment. The ion pump creatively adopts a modular design and is composed of an independent air exhaust module and an independent magnetic steel module. The magnetic steel module sleeves the air exhaust module, and the magnetic steel module and the air exhaust module are quickly assembled and disassembled through simple mechanical connection. And an anti-floating filter screen is additionally arranged at a connecting flange of the air exhaust module. According to the invention, two major problems in application in a weightless environment are solved: firstly, particulate matters such as a titanium film and the like which are easy to float in the weightless environment are effectively intercepted through the anti-floating filter screen, so that the safety of a test system is guaranteed; and 2, through the modular design, the magnetic steel module with a large occupied area can be repeatedly used, and only the light-weight air exhaust module needs to be replaced, so that expensive transportation resources are greatly saved, and meanwhile, the air exhaust module can be independently baked at a high temperature without influencing the performance of the magnetic steel.

The utility model discloses a waterproof ion pump power supply protection housing, and relates to the technical field of power supply protection devices. The device comprises a shell which is of a hollow structure with openings formed in the two ends in a penetrating mode, two fixing plates are oppositely and fixedly connected to the top of the shell, baffles are rotationally connected to the two fixing plates, positioning plates are fixedly connected to the two baffles, limiting holes are formed in the positioning plates in a penetrating mode, and a groove body is formed in the bottom of the shell; the top of the tank body is detachably connected with a screen, water-absorbent resin is fixedly connected in the tank body at the bottom of the screen, and two groups of limiting mechanisms for limiting the limiting holes are arranged in the tank body relative to the water-absorbent resin. According to the utility model, the water-absorbent resin absorbs water and expands, so that the limiting mechanism loosens the positioning plate, and the baffle plate shields the opening of the shell, thereby avoiding the phenomenon that the baffle plate cannot completely shield the opening of the shell.

This invention discloses a compact accelerator ultra-high vacuum system and its implementation method, comprising a diode iron vacuum chamber, a BUMP iron vacuum chamber, a BPM cavity, a vacuum pump chamber, and a quadrupole iron vacuum chamber connected sequentially to form a beam mainline. Multiple non-evaporable getter plates are arrayed within both the diode and quadrupole iron vacuum chambers to remove reactive gases from the beam mainline to achieve ultra-high vacuum. The vacuum pump chamber is equipped with a vacuum gauge, a sputtering ion pump, a molecular pump, and a gate valve. The vacuum gauge measures the vacuum level within the beam mainline, the sputtering ion pump removes argon and methane from the beam mainline and performs baking, the molecular pump performs rough evacuation of the beam mainline and exhausts gas during the baking process, and the gate valve isolates the molecular pump from the beam mainline. This invention can replace the method used when space constraints prevent the installation of a titanium sublimation pump to extract reactive gases such as hydrogen and carbon monoxide from the system, thereby achieving ultra-high vacuum.

The present invention relates to the technical field of energy spectrometers and provides an energy spectrometer for automatic analysis and detection of biological material samples, comprising a metal shielding shell, an analysis chamber, an injection mechanism, an energy analyzer, an ion pump, an ion gauge, a molecular pump, a control display and an injection port. The injection mechanism comprises a telescopic assembly, a sealing tube, a drive module, a rotating frame and a sample placement portion. The telescopic assembly comprises an arc-shaped shell, a first bevel gear, a fixed cover and a first electric telescopic rod. The drive module comprises a drive portion, a second central tube, a third bevel gear, a first key bar, a second key bar, a second electric telescopic rod, a sleeve plate, a nitrogen tank, a micro air pump and a flexible tube. The two ends of the rotating frame are respectively fixedly connected to the third central tube and the fourth central tube. On the one hand, the sealing tube can be automatically controlled to seal the biological material sample to be tested after the sample is placed, and the purpose of exhausting oxygen is achieved by discharging nitrogen between the sealing tube and the arc-shaped shell. The rotating frame has the characteristics of easy adjustment and improved accuracy of detection results.

The utility model discloses a supporting structure and semiconductor detection equipment, and the supporting structure comprises a support which is used for bearing a supported member; the limiting component is detachably installed on the support, and a limiting space is defined by the limiting component and the support, so that the position of the supported piece is allowed to be adjusted relative to the limiting component; and the positioning piece is movably connected with the limiting component, and one part of the positioning piece can extend into the limiting space to position the supported piece. According to the supporting structure and the semiconductor detection equipment provided by the invention, fine adjustment of the position of the ion pump can be realized in the installation process of the supported part, the stress of the ion pump is optimized, and the problem of stress concentration in the operation process of the ion pump is reduced.

A sputter ion pump cathode (106) comprising: a sheet of material (200) having an aperture (202) therethrough; and a protrusion (204) extending along an axis (206) from an edge (208) of the aperture (202) inwards towards a central portion (210) of the aperture (202); wherein the protrusion (204) is twisted about the axis (206), for example, by approximate 90°.

The present invention discloses a method for evaluating the vacuum life of a two-point variable-temperature Dewar with a low coverage model. First, the desorption rate equation under low coverage is used as the Dewar outgassing rate model, and the overall outgassing rate change trend of the Dewar is obtained through the pumping speed of the ion pump and the vacuum in the exhaust system. Then, the method of two-point variable temperature at the end of exhaust is used to eliminate the influence of coverage, and the overall outgassing activation energy of the Dewar is obtained. Finally, the initial outgassing rate and the relationship between the outgassing rate and time at the storage temperature are obtained using the outgassing activation energy. The vacuum life of the Dewar is evaluated according to the Dewar volume and the cut-off vacuum. The present invention is a non-destructive testing and evaluation method, which will not damage the performance of the detector, is convenient to implement, and provides a non-destructive testing and evaluation method for the vacuum life of small-batch and diversified Dewars.