A processing device and method for reducing dark current of a high-linear photomultiplier tube

Abstract

The present invention relates to a processing device for reducing the dark current of a high-linear photomultiplier tube, which includes an introduction chamber, a cleaning chamber, a vacuum drying and glow discharge chamber, a power supply aging and dark current testing chamber, and an export chamber that are sequentially arranged along the conveying direction of a conveyor belt. Gates are provided between the chambers, and manipulators are installed in each chamber. The present invention also relates to a processing method for reducing the dark current of a high-linear photomultiplier tube, which includes introducing the high-linear photomultiplier tube onto the conveyor belt; the high-linear photomultiplier tube sequentially enters the cleaning chamber to wash away pollutants, the vacuum drying and glow discharge chamber for drying and removing impurities, the power supply aging and dark current testing chamber to stabilize free alkali metal particles and record the dark current, and after the recording is completed, it is conveyed by the conveyor belt to the export chamber. By using the processing device and method for reducing the dark current of a high-linear photomultiplier tube provided by the present invention, the dark current of the high-linear photomultiplier tube is reduced, and the reliability of the product is improved.

Description

Technical Field

[0001] The present invention relates to the field of optoelectronic technologies, and particularly to a processing device and method for reducing dark current of a high-linear photomultiplier tube. Background Art

[0002] A photomultiplier tube is a vacuum photodetector device. It converts photons into photoelectrons through the external photoelectric effect of its own photocathode made of alkali metal semiconductor material, and then outputs an electrical signal that can be detected through the anode after being multiplied and amplified by the multiplication system.

[0003] A high-sensitivity detector made of a high-linear photomultiplier tube can be applied to the measurement of a strong pulsed radiation field. In order to increase the upper limit of the sensitivity of the detector, it is necessary to increase the maximum pulse output of the high-linear photomultiplier tube. Ultimately, a relatively high supply high voltage needs to be applied to the high-linear photomultiplier tube. Under the action of the high voltage, there is contamination on the surface of the pin glass during the transmission process of the high-linear photomultiplier tube, and there are unstable free alkali metals inside the photomultiplier tube. In order to improve the withstand voltage characteristics of the surface of the pin glass and reduce leakage, alcohol is usually used to wipe the glass surface near the pins. However, when the high-linear photomultiplier tube is wiped with alcohol, obvious leakage will occur when a high voltage is applied. At the same time, when the high-linear photomultiplier tube undergoes environmental changes, such as temperature changes or exposure effects, the alkali metal particles inside the tube are ionized again. The contamination on the surface of the pin glass and the ionization of the alkali metal particles lead to an increase in dark current, resulting in a decrease in the sensitivity of the detector.

[0004] Therefore, the prior art has defects and needs to be improved and developed. Summary of the Invention

[0005] Embodiments of the present invention provide a processing device and method for reducing dark current of a high-linear photomultiplier tube, which are used to solve the technical problem that the dark current of the high-linear photomultiplier tube in the prior art increases and the sensitivity decreases when it is applied to a detector.

[0006] To achieve the above object, in the first aspect of the embodiments of the present invention, a processing device for reducing the dark current of a high-linear photomultiplier tube is provided, which includes an introduction chamber, a cleaning chamber, a vacuum drying and glow discharge chamber, a power supply aging and dark current testing chamber, and an export chamber arranged in sequence along the conveying direction of a conveyor belt; gates are provided between each chamber, at the entrance of the introduction chamber, and at the exit of the export chamber, and when the gates are closed, the gates are used to form a sealed space for each chamber; a manipulator is installed in each chamber, and the manipulator is used to pick up and place the high-linear photomultiplier tube; a flushing pipe is installed in the cleaning chamber; an exhaust pipe and an intake pipe are installed in the vacuum drying and glow discharge chamber, the intake pipe is used to fill in gas, the exhaust pipe is used to discharge the air in the vacuum drying and glow discharge chamber, and a glow electrode plate is also fixed in the vacuum drying and glow discharge chamber, and the installation height of the glow electrode plate is lower than the intake ports of the exhaust pipe and the intake pipe. A power supply voltage divider is fixed in the power supply aging and dark current testing chamber, and the power supply voltage divider is electrically connected to a power supply high voltage.

[0007] Further, the liquid inlet of the flushing pipe is connected to at least an organic cleaning agent, hot water, and pure water, and the liquid outlet of the flushing pipe is located in the cleaning chamber. When the high-linear photomultiplier tube is in the cleaning chamber, the flushing pipe is used to flush the high-linear photomultiplier tube with the organic cleaning agent, hot water, and pure water in sequence.

[0008] Further, a high-pressure nozzle is installed at the liquid outlet of the flushing pipe, and the spraying angle of the high-pressure nozzle is 360°.

[0009] Further, the gas filled in the intake pipe in the vacuum drying and glow discharge chamber is an inert gas, and the inert gas is at least one of argon and xenon.

[0010] Further, there is at least one glow electrode plate fixed in the vacuum drying and glow discharge chamber. When the number of glow electrode plates is 1, the fixing method of the glow electrode plate is horizontal fixing; when the number of glow electrode plates is greater than 1, the fixing method of the glow electrode plates is horizontal fixing and they are located on the same horizontal line, and the total horizontal fixing length of all the glow electrode plates is less than the length of the vacuum drying and glow discharge chamber.

[0011] Further, it further includes a silo body, the conveyor belt is located at the bottom of the silo body, the inlet chamber, the cleaning chamber, the vacuum drying and glow discharge chamber, the power supply aging and dark current testing chamber, and the outlet chamber are located on the conveyor belt and inside the silo body. Windows are provided at the inlet of the inlet chamber and the outlet of the outlet chamber corresponding to the silo body. When the gate falls, the gate blocks the window and forms a sealed space in the silo body. When the high linear photomultiplier tube is being processed, the window is used for the entry of the high linear photomultiplier tube.

[0012] In the second aspect of the embodiment of the present invention, a processing method including the above-mentioned processing device for reducing the dark current of a high linear photomultiplier tube is provided, including:

[0013] S102: Import the high linear photomultiplier tube onto the conveyor belt;

[0014] S104: Start the device, lower the gate at the inlet of the inlet chamber, and the high linear photomultiplier tube sequentially enters the cleaning chamber to wash away pollutants, enters the vacuum drying and glow discharge chamber to dry and remove impurities, enters the power supply aging and dark current testing chamber to stabilize the free alkali metal particles and record the dark current. After the recording is completed, it is conveyed by the conveyor belt to the outlet chamber. When the high linear photomultiplier tube is being processed in each chamber, the gates of each chamber fall to form a sealed space in each chamber;

[0015] S106: Export the high linear photomultiplier tube from the conveyor belt.

[0016] Further, after the high linear photomultiplier tube is grabbed by the manipulator and enters the cleaning chamber, the gate of the cleaning chamber falls, and the flushing pipe in the cleaning chamber flushes the high linear photomultiplier tube three times in sequence by means of high-pressure flushing at a 360° solid angle with an organic cleaning agent, hot water, and pure water, so as to remove the dust, fibers, and organic pollutants on the high linear photomultiplier tube.

[0017] Further, after the high linear photomultiplier tube is grabbed by the manipulator and enters the vacuum drying and glow discharge chamber, the gate of the vacuum drying and glow discharge chamber falls, the intake pipe of the vacuum drying and glow discharge chamber is closed, and the exhaust pipe of the vacuum drying and glow discharge chamber is used to evacuate the air, vaporize the pure water on the surface of the high linear photomultiplier tube and dry the surface of the high linear photomultiplier tube; then the intake pipe of the vacuum drying and glow discharge chamber is opened and argon is filled to start the glow electrode of the vacuum drying and glow discharge chamber to remove the impurities on the glass surface near the pin of the high linear photomultiplier tube.

[0018] Further, after the high-linear photomultiplier tube is grasped by the manipulator and enters the power supply aging and dark current test chamber, the gate of the power supply aging and dark current test chamber drops, and the manipulator is used to connect the power supply voltage divider in the power supply aging and dark current test chamber. The power supply voltage divider provides high voltage, and the high-linear photomultiplier tube works continuously for 3 hours to stabilize the free alkali metal particles. When the free alkali metal particles are stable, the dark current is tested and recorded.

[0019] Beneficial effects:

[0020] As can be seen from the above technical solutions, the present invention provides a processing device and method for reducing the dark current of a high-linear photomultiplier tube. By sequentially arranging an introduction chamber, a cleaning chamber, a vacuum drying and glow discharge chamber, a power supply aging and dark current test chamber, and an export chamber along the conveying direction of the conveyor belt, the functions of cleaning, drying, deep cleaning, power supply aging, and dark current testing of the high-linear photomultiplier tube are realized. The entire process is in a closed environment, avoiding secondary pollution. Through the cleaning of the high-linear photomultiplier tube, the cleanliness level of the pin pollutants of the high-linear photomultiplier tube is improved, the high-linear photomultiplier tube is stabilized, the dark current is effectively reduced, and the reliability of the product is improved. And since the present invention realizes the automatic integrated processing of the high-linear photomultiplier tube, it saves labor and increases reliability.

[0021] It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be regarded as part of the inventive subject matter of the present disclosure as long as such concepts do not contradict each other.

[0022] The foregoing and other aspects, embodiments, and features of the teachings of the present invention can be more fully understood from the following description taken in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as features and / or beneficial effects of exemplary embodiments, will be apparent from the following description or will be learned by practice of the specific embodiments according to the teachings of the present invention. Description of the Drawings

[0023] The drawings are not drawn to scale in accordance with real reference objects. In the drawings, each identical or approximately identical component shown in each figure may be denoted by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the present invention will be described by way of example and with reference to the drawings, wherein:

[0024] Figure 1 It is a schematic structural diagram of a processing device for reducing the dark current of a high-linear photomultiplier tube in an embodiment of the present application.

[0025] Description of the reference numerals in the drawings:

[0026] Introduction chamber 1; cleaning chamber 2; rinsing pipe 201; vacuum drying and glow discharge chamber 3; exhaust pipe 301; intake pipe 302; glow electrode plate 303; power supply aging and dark current testing chamber 4; power supply voltage divider 401; export chamber 5; gate 6; manipulator 7; conveyor belt 8; high linear photomultiplier tube 9. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings as understood by those of ordinary skill in the art to which the present invention pertains.

[0028] The "first", "second" and similar terms used in the description and claims of this patent application of the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, unless clearly specified otherwise in the context, the singular forms of "a", "an" or "the" and similar terms do not denote a limitation on quantity, but mean that there is at least one. The terms such as "including" or "comprising" are intended to indicate that the elements or items appearing before "including" or "comprising" cover the features, wholes, steps, operations, elements and / or components listed after "including" or "comprising", and do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0029] The embodiments of the present invention provide a processing device and method for reducing the dark current of a high linear photomultiplier tube, which are used to solve the technical problem that the dark current of the high linear photomultiplier tube increases in the prior art, resulting in a decrease in sensitivity when applied to a detector.

[0030] In view of this, the present invention conceives a processing device for reducing the dark current of the high linear photomultiplier tube 9, with reference to Figure 1, including an introduction chamber 1, a cleaning chamber 2, a vacuum drying and glow discharge chamber 3, a power supply aging and dark current testing chamber 4, and an export chamber 5 arranged in sequence along the conveying direction of the conveyor belt 8; gates 6 are provided between each chamber, at the entrance of the introduction chamber 1 and at the exit of the export chamber 5. When the gate 6 is closed, the gate 6 is used to form a sealed space for each chamber; a manipulator 7 is installed in each chamber, and the manipulator 7 is used to pick and place the high linear photomultiplier tube 9; a flushing pipe 201 is installed in the cleaning chamber 2; an exhaust pipe 301 and an inlet pipe 302 are installed in the vacuum drying and glow discharge chamber 3. The inlet pipe 302 is used to fill in gas, and the exhaust pipe 301 is used to discharge the air in the vacuum drying and glow discharge chamber 3. A glow electrode plate 303 is also fixed in the vacuum drying and glow discharge chamber 3, and the installation height of the glow electrode plate 303 is lower than the air inlet of the exhaust pipe 301 and the air inlet of the inlet pipe 302; a power supply voltage divider 401 is fixed in the power supply aging and dark current testing chamber 4, and the power supply voltage divider 401 is electrically connected to a power supply high voltage.

[0031] A photomultiplier tube is a vacuum photodetector device. It converts photons into photoelectrons through the external photoelectric effect of the photocathode made of alkali metal semiconductor material, and then the multiplied system multiplies and amplifies it and outputs an electrical signal that can be detected through the anode. Among them, a high-sensitivity detector made of the high linear photomultiplier tube 9 is applied to the measurement application of a strong pulsed radiation field. In order to increase the upper limit of the detector's sensitivity, it is necessary to increase the maximum pulse output of the high linear photomultiplier tube 9. Ultimately, a relatively high power supply high voltage needs to be applied to the high linear photomultiplier tube 9. Under the action of high voltage, the contamination of the pin glass surface during the transmission process of the high linear photomultiplier tube 9 and the unstable free alkali metal inside the photomultiplier tube will cause an increase in the dark current. Therefore, finding ways to improve the cleanliness of the glass surface near the pins and stabilizing the free alkali metal inside the tube becomes an important means to reduce the dark current of the high linear photomultiplier tube 9.

[0032] The high linear photomultiplier tube 9 passes through the cleaning chamber 2, the vacuum drying and inert gas glow discharge chamber 3, and the power supply aging and dark current testing chamber 4 in sequence. Gates 6 are provided between each chamber. The introduction chamber 1 and the export chamber 5 of the high linear photomultiplier tube 9 are connected through the gate 6 and the conveyor belt, and the high linear photomultiplier tube 9 is picked and placed by the manipulator 7. The whole process realizes a fully enclosed operation of the process, avoiding the possibility of secondary pollution. In some embodiments, the gate 6 is selected as a metal gate, and a plate is laid on the conveyor belt to further realize the sealing of the high linear photomultiplier tube 9 in each chamber, improving the cleanliness of the high linear photomultiplier tube 9.

[0033] The inlet of the flushing pipe 201 is connected to at least an organic cleaning agent, hot water, and pure water. The outlet of the flushing pipe 201 is located in the cleaning chamber 2. When the high linear photomultiplier tube 9 is in the cleaning chamber 2, the flushing pipe 201 is used to flush the high linear photomultiplier tube 9 with the organic cleaning agent, hot water, and pure water in sequence.

[0034] The advantage of cleaning the high linear photomultiplier 9 with the flushing pipe 201 is that it can increase the light transmittance, improve the performance (upper limit of sensitivity) of the high linear photomultiplier 9, and at the same time is a pre-step for the next glow discharge cleaning.

[0035] The organic cleaning agent is a cleaning agent specifically used to clean dirt and oil stains. It is usually composed of surfactants, auxiliaries and other additives. The main components of the high-pressure cleaning liquid include the following: Surfactant: The surfactant is one of the main components of the high-pressure cleaning liquid, which can reduce the surface tension of water and improve the cleaning effect. Auxiliary: The auxiliary is an auxiliary component in the high-pressure cleaning liquid, which can enhance the cleaning effect and improve the cleaning speed. Other additives: The high-pressure cleaning liquid may also include other additives, such as preservatives, bactericides, etc., to ensure the cleaning effect and the quality of the items after cleaning.

[0036] A high-pressure nozzle is installed at the liquid outlet of the flushing pipe 201, and the spraying angle of the high-pressure nozzle is 360°.

[0037] The gas filled into the intake pipe 302 in the vacuum drying and glow discharge chamber 3 is an inert gas, and the inert gas is at least one of argon and xenon.

[0038] There is at least one glow discharge electrode plate 303 fixed in the vacuum drying and glow discharge chamber 3. When the number of glow discharge electrode plates 303 is 1, the fixing method of the glow discharge electrode plate 303 is horizontal fixing; when the number of glow discharge electrode plates 303 is greater than 1, the fixing method of the glow discharge electrode plates 303 is horizontal fixing and they are located on the same horizontal line, and the horizontal fixing length of all glow discharge electrode plates 303 is less than the length of the vacuum drying and glow discharge chamber 3.

[0039] Glow discharge cleaning is an efficient and environmentally friendly cleaning technology. It uses the glow discharge phenomenon generated by a high-voltage electric field to excite gas molecules into plasma, thereby producing strong chemical reactions and physical effects to achieve the purpose of cleaning the surface. The principle of glow discharge cleaning is to use active substances such as electrons, ions, and free radicals generated by a high-voltage electric field to react chemically with the surface of pollutants, decompose, oxidize, or reduce them, thereby achieving the purpose of cleaning. During the glow discharge process, the energy of electrons and ions is very high, which can decompose molecules and atoms into ions and free radicals. At the same time, it can also excite the vibration, rotation, and electronic transition of molecules and atoms, thereby producing strong chemical reactions and physical effects. The advantages of glow discharge cleaning are high cleaning efficiency, good cleaning quality, no pollution during the cleaning process, and no need to use chemical agents, etc. It can clean the surfaces of various materials, including metals, ceramics, glass, plastics, etc., can remove surface oil stains, oxide layers, rust, stains, etc., and can also improve surface roughness, increase surface energy, and improve coating adhesion, etc. Therefore, using a glow electrode plate 303 for glow discharge cleaning of the high-linear photomultiplier tube 9 can completely remove impurities on the glass surface near the pins of the high-linear photomultiplier tube 9.

[0040] The processing equipment for reducing the dark current of the high-linear photomultiplier tube 9 provided by the embodiment of the present invention further includes a chamber body. The conveyor belt 8 is located at the bottom of the chamber body. The introduction chamber 1, the cleaning chamber 2, the vacuum drying and glow discharge chamber 3, the power supply aging and dark current testing chamber 4, and the export chamber 5 are located on the conveyor belt 8 and inside the chamber body. Windows are provided at the entrance of the chamber body corresponding to the introduction chamber 1 and the exit of the export chamber 5. When the gate 6 drops, the gate 6 blocks the window and forms a sealed space for the chamber body. When the high-linear photomultiplier tube 9 is being processed, the window is used for the entry of the high-linear photomultiplier tube 9.

[0041] By using the chamber body, further sealing is achieved to prevent the high-linear photomultiplier tube 9 from being contaminated.

[0042] A processing method for a processing equipment for reducing the dark current of a high-linear photomultiplier tube 9 includes:

[0043] S102: Introduce the high-linear photomultiplier tube 9 onto the conveyor belt 8;

[0044] S104: Start the device, lower the gate 6 at the entrance of the introduction chamber 1, and the high-linear photomultiplier tube 9 sequentially enters the cleaning chamber 2 to flush away pollutants, enters the vacuum drying and glow discharge chamber 3 to dry and remove impurities, enters the power supply aging and dark current testing chamber 4 to stabilize free alkali metal particles and record the dark current. After the recording is completed, it is conveyed to the export chamber 5 by the conveyor belt 8. When the high-linear photomultiplier tube 9 is being processed in each chamber, the gate 6 of each chamber drops to make each chamber form a sealed space;

[0045] S106: Export the high linear photomultiplier tube 9 from the conveyor belt 8.

[0046] After the high linear photomultiplier tube 9 is grasped by the manipulator 7 and enters the cleaning chamber 2, the gate 6 of the cleaning chamber 2 drops, and the flushing pipe 201 in the cleaning chamber 2 flushes the high linear photomultiplier tube 9 three times in sequence by high-pressure flushing in a 360° solid angle manner, namely, flushing with organic cleaning agent, hot water flushing, and pure water flushing, to remove dust, fibers, and organic pollutants on the high linear photomultiplier tube 9.

[0047] After the high linear photomultiplier tube 9 is grasped by the manipulator 7 and enters the vacuum drying and glow discharge chamber 3, the gate 6 of the vacuum drying and glow discharge chamber 3 drops, the intake pipe 302 of the vacuum drying and glow discharge chamber 3 is closed, and the exhaust pipe 301 of the vacuum drying and glow discharge chamber 3 is used to evacuate the air, vaporize the pure water on the surface of the high linear photomultiplier tube 9 and dry the surface of the high linear photomultiplier tube 9; then the intake pipe 302 of the vacuum drying and glow discharge chamber 3 is opened and filled with argon to start the glow electrode of the vacuum drying and glow discharge chamber 3 to remove impurities on the glass surface near the pins of the high linear photomultiplier tube 9.

[0048] After the high linear photomultiplier tube 9 is grasped by the manipulator 7 and enters the power supply aging and dark current test chamber 4, the gate 6 of the power supply aging and dark current test chamber 4 drops, the manipulator 7 is used to connect the power supply voltage divider 401 in the power supply aging and dark current test chamber 4, the power supply voltage divider 401 provides high voltage, and the high linear photomultiplier tube 9 works continuously for 3 h to stabilize the free alkali metal particles. When the free alkali metal particles are stable, the dark current is tested and recorded.

[0049] The power supply aging and dark current test chamber 4 is used to stabilize the performance of the high linear photomultiplier tube 9. Because in the vacuum drying and glow discharge chamber 3, cleaning is carried out through glow discharge in a high-voltage electric field, which will cause the surface of the high linear photomultiplier tube 9 to carry charges and affect the performance. Therefore, a power supply aging step is set to remove the charges. Power supply aging means placing the high linear photomultiplier tube 9 in a dark room, normally powering it on in a light-shielded environment, testing the magnitude of the current generated at this time (i.e., the dark current), and recording it as a reference performance index parameter for the subsequent use of the device.

[0050] In summary, by using a processing device and method for reducing the dark current of a high linear photomultiplier tube provided by the present invention, the functions of cleaning, drying, deep cleaning, power supply aging, and dark current testing of the high linear photomultiplier tube are realized. Through the cleaning of the high linear photomultiplier tube, the cleanliness level of the pollutants on the pins of the high linear photomultiplier tube is improved, the high linear photomultiplier tube is stabilized, the dark current is effectively reduced, and the reliability of the product is improved. And because the present invention realizes the automatic integrated processing of the high linear photomultiplier tube, it saves labor and increases reliability.

[0051] Although the present invention has been disclosed above in the preferred embodiments, it is not intended to limit the present invention. Those of ordinary skill in the art to which the present invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A processing device for reducing dark current of a high-linear photomultiplier tube, characterized in that It includes an introduction chamber, a cleaning chamber, a vacuum drying and glow discharge chamber, a power supply aging and dark current testing chamber, and an export chamber that are arranged in sequence along the conveying direction of the conveyor belt; gates are provided between each chamber, at the entrance of the introduction chamber, and at the exit of the export chamber. When the gates are closed, the gates are used to form a sealed space for each chamber; a manipulator is installed in each chamber, and the manipulator is used to pick and place a high linear photomultiplier tube; a flushing pipe is installed in the cleaning chamber, and the liquid inlet of the flushing pipe is connected to at least an organic cleaning agent, hot water, and pure water. The liquid outlet of the flushing pipe is located in the cleaning chamber. When the high linear photomultiplier tube is in the cleaning chamber, the flushing pipe is used to flush the high linear photomultiplier tube with the organic cleaning agent, hot water, and pure water in sequence; an exhaust pipe and an intake pipe are installed in the vacuum drying and glow discharge chamber. The intake pipe is used to fill in gas, and the exhaust pipe is used to discharge the air in the vacuum drying and glow discharge chamber. A glow electrode plate is also fixed in the vacuum drying and glow discharge chamber. The installation height of the glow electrode plate is lower than the intake ports of the exhaust pipe and the intake pipe in the vacuum drying and glow discharge chamber. After using the exhaust pipe of the vacuum drying and glow discharge chamber to evacuate and vaporize the pure water on the surface of the high linear photomultiplier tube and dry the surface of the high linear photomultiplier tube, it is used to open the intake pipe of the vacuum drying and glow discharge chamber to fill in argon gas and start the glow electrode of the vacuum drying and glow discharge chamber to remove impurities on the glass surface near the pins of the high linear photomultiplier tube; a power supply voltage divider is fixed in the power supply aging and dark current testing chamber, and the power supply voltage divider is electrically connected to a power supply high voltage. After the high linear photomultiplier tube continuously works under the power supply high voltage for 3 hours, it is used to stabilize the free alkali metal particles.

2. A processing device for reducing dark current of a high-linear photomultiplier tube according to claim 1, characterized in that, A high-pressure nozzle is installed on the liquid outlet of the flushing pipe, and the spraying angle of the high-pressure nozzle is 360°.

3. A processing device for reducing dark current of a high-linear photomultiplier tube according to claim 1, characterized in that, The gas filled in the intake pipe in the vacuum drying and glow discharge chamber is an inert gas, and the inert gas is at least one of argon gas and xenon gas.

4. A processing device for reducing dark current of a high-linear photomultiplier tube according to claim 1, characterized in that There is at least one glow electrode plate fixed in the vacuum drying and glow discharge chamber. When the number of glow electrode plates is 1, the fixing method of the glow electrode plate is horizontal fixing; when the number of glow electrode plates is greater than 1, the fixing method of the glow electrode plates is horizontal fixing and they are located on the same horizontal line. The total horizontal fixing length of all the glow electrode plates is less than the length of the vacuum drying and glow discharge chamber.

5. A processing device for reducing dark current of a high-linear photomultiplier tube according to claim 1, characterized in that, It also includes a housing. The conveyor belt is located at the bottom of the housing. The introduction chamber, the cleaning chamber, the vacuum drying and glow discharge chamber, the power supply aging and dark current testing chamber, and the export chamber are located on the conveyor belt and inside the housing. Windows are provided at the entrance of the introduction chamber and the exit of the export chamber corresponding to the housing. When the gates fall, the gates block the windows and form a sealed space for the housing. When the high linear photomultiplier tube is being processed, the windows are used for the entry of the high linear photomultiplier tube.

6. A processing method including the processing device for reducing dark current of a high-linear photomultiplier tube described in claim 1, characterized in that, It includes: S102: Introduce the high linear photomultiplier tube onto the conveyor belt; S104: Start the device, lower the gate at the entrance of the introduction chamber, and the high linear photomultiplier tube sequentially enters the cleaning chamber to wash away pollutants, enters the vacuum drying and glow discharge chamber for drying and impurity removal, enters the power supply aging and dark current test chamber to stabilize the free alkali metal particles and record the dark current. After the recording is completed, it is conveyed to the export chamber by a conveyor belt. When the high linear photomultiplier tube is being processed in each chamber, the gates of each chamber are lowered to form a sealed space for each chamber; S106: Export the high linear photomultiplier tube from the conveyor belt.

7. The processing method of a processing device for reducing dark current of a high-linear photomultiplier tube according to claim 6, characterized in that After the high linear photomultiplier tube is grabbed by the manipulator and enters the cleaning chamber, the gate of the cleaning chamber is lowered. The flushing pipe in the cleaning chamber flushes the high linear photomultiplier tube three times in sequence by high-pressure flushing at a 360° solid angle, namely, flushing with organic cleaning agent, hot water flushing, and pure water flushing, to remove the dust, fibers, and organic pollutants on the high linear photomultiplier tube.

8. The processing method of a processing device for reducing dark current of a high-linear photomultiplier tube according to claim 6, characterized in that, After the high linear photomultiplier tube is grabbed by the manipulator and enters the vacuum drying and glow discharge chamber, the gate of the vacuum drying and glow discharge chamber is lowered, and the intake pipe of the vacuum drying and glow discharge chamber is closed. The exhaust pipe of the vacuum drying and glow discharge chamber is used to evacuate the air, vaporize the pure water on the surface of the high linear photomultiplier tube, and dry the surface of the high linear photomultiplier tube; then the intake pipe of the vacuum drying and glow discharge chamber is opened and filled with argon to start the glow electrode of the vacuum drying and glow discharge chamber, and remove the impurities on the glass surface near the pin of the high linear photomultiplier tube.

9. The processing method of a processing device for reducing dark current of a high-linear photomultiplier tube according to claim 6, characterized in that, After the high linear photomultiplier tube is grabbed by the manipulator and enters the power supply aging and dark current test chamber, the gate of the power supply aging and dark current test chamber is lowered. The manipulator is used to connect the power supply voltage divider in the power supply aging and dark current test chamber. The power supply voltage divider provides high voltage. The high linear photomultiplier tube works continuously for 3 h to stabilize the free alkali metal particles. When the free alkali metal particles are stable, the dark current is tested and recorded.

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