Atomic oxygen experimental device

Abstract

The utility model discloses an atomic oxygen experiment device which comprises a vertical vacuum tank and a vacuumizing system, the vertical vacuum tank comprises a tank body and a top cover, the top cover is used for opening and closing the top of the tank body, and the vacuumizing system is connected with the tank body and used for vacuumizing the tank body. A plurality of hot cathode discharge filaments are arranged on the inner side of the top cover, a multi-pole magnetic field restraint system is arranged on the outer wall of the tank body and used for forming a multi-pole restraint magnetic field in the tank body, an oxygen access port is formed in the tank body, and a test bed is arranged in the tank body. According to the utility model, the hot cathode discharge filament and the multi-pole magnetic field restraint system are respectively arranged inside the top cover and outside the tank body, so that the filament is convenient to maintain and replace.

Description

Technical Field

[0001] This utility model relates to an atomic oxygen experimental device, belonging to the technical field of aviation environment simulation equipment. Background Technology

[0002] When spacecraft fly in low Earth orbit, the atmosphere is primarily composed of atomic oxygen generated by ultraviolet radiation. This atomic oxygen readily reacts with the surface materials of the spacecraft, affecting their stability. Some ground-based simulation devices can mimic the atomic oxygen state of the space environment to test the corresponding material properties. However, these simulation devices typically integrate irradiation simulation equipment, resulting in complex structures, inconvenient maintenance, and high operating costs. Utility Model Content

[0003] To address the shortcomings of the existing technology, this invention provides an atomic oxygen experimental device that improves the ease of maintenance and reduces operating costs.

[0004] The technical solution of this utility model is as follows: An atomic oxygen experimental device includes a vertical vacuum tank and a vacuum pumping system. The vertical vacuum tank includes a tank body and a top cover. The top cover is used to open and close the top of the tank body. The vacuum pumping system is connected to the tank body to evacuate the tank body. The inner side of the top cover is provided with a plurality of hot cathode discharge filaments. The outer wall of the tank body is provided with a multi-polar magnetic field confinement system to form a multi-polar confinement magnetic field inside the tank body. The tank body is provided with an oxygen inlet port. The tank body is provided with an experimental platform.

[0005] Furthermore, one end of each of the several hot cathode discharge filaments is connected to form a common terminal, and the common terminal and the non-common terminal of the hot cathode discharge filament are respectively led out from the top cover to form a wiring control terminal.

[0006] Furthermore, the non-common ends of the hot cathode discharge filament are evenly distributed along the circumference of the top cover.

[0007] Furthermore, the multi-pole magnetic field confinement system includes several permanent magnets, which are uniformly distributed on the outer wall of the tank.

[0008] Furthermore, the outer wall of the tank is provided with a sandwich layer, and the permanent magnet is disposed within the sandwich layer.

[0009] Furthermore, the bottom of the tank is provided with a vertical threaded cavity, and the bottom surface of the test bench is provided with a screw that mates with the vertical threaded cavity.

[0010] Furthermore, the tank body has several observation windows on its wall surface.

[0011] Compared with the prior art, the advantages of the technical solution provided by this utility model are as follows:

[0012] This invention uses a hot cathode discharge filament to construct a plasma excitation source, and a multi-pole magnetic field confinement system to confine charged particles. Since the hot cathode discharge filament is a consumable component, it is placed inside the openable and closable top cover, while the multi-pole magnetic field confinement system is placed on the outer wall of the tank. The two are set separately, which is simple in structure and can facilitate the maintenance and replacement of the hot cathode discharge filament, thereby reducing the cost of use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of the atomic oxygen experimental apparatus in this embodiment.

[0014] Figure 2 This is a side view of the atomic oxygen experimental apparatus used in this embodiment.

[0015] Figure 3 This is a top view of the top cover. Detailed Implementation

[0016] The present invention will be further described below with reference to the embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading this description, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0017] Please combine Figures 1 to 3 As shown, the atomic oxygen experimental apparatus of this embodiment includes a vertical vacuum chamber and a vacuum system. Both the vertical vacuum chamber and the vacuum system are mounted on the frame worktable 1, with the vertical vacuum chamber mounted on the table surface of the frame worktable 1. The vacuum system is installed inside the frame worktable 1.

[0018] The vertical vacuum chamber is made of stainless steel and has a top-opening structure, comprising a chamber body 2 and a top cover 3. In one specific embodiment, the diameter of the chamber body 2 is 400 mm, and the outer wall thickness of the chamber body 2 is 3 mm. To facilitate observation of the internal conditions, a Dg80 observation window 4 is also installed on the outer wall of the chamber body 2. To facilitate simultaneous irradiation experiments, a DN70 ultraviolet irradiation window 5 is opened at the center of the right side of the chamber body 2.

[0019] The outer wall of the tank body 2 is also equipped with a multi-pole magnetic field confinement system. Specifically, a detachable stainless steel cylinder 6 is installed on the outside of the tank body 2. The inner wall of the stainless steel cylinder 6 is equipped with φ10X6mm neodymium iron boron permanent magnet discs 7 arranged in a matrix. When the stainless steel cylinder 6 is fitted into the tank body 2, it forms an interlayer with the outer wall of the tank body 2. These neodymium iron boron permanent magnet discs 7 are located in the interlayer close to the outer wall of the tank body 2 to construct a multi-pole magnetic field confinement.

[0020] The bottom flange of the vertical vacuum vessel has a Dg200 main extraction port 8 for installing an ultra-high vacuum slide gate valve 9. A support frame 10 is installed on the upper side of the main extraction port 8. The support frame 10 has a vertical threaded cavity 11, within which a matching screw 12 is installed. A test platform 13 for placing the test workpiece is fixedly installed on the top of the screw 12. The height of the test platform 13 within the vertical vacuum vessel can be adjusted by rotating it, thereby adjusting the position of the test workpiece. The bottom cover of the vertical vacuum vessel also has an oxygen inlet port 14 for introducing reaction gases.

[0021] The vacuum system can utilize mature equipment from existing technologies, such as a mechanical pump 15 with an oil-absorbing trap as a pre-pump and backing pump, combined with a turbomolecular pump 16 as the main pump. It is connected to an ultra-high vacuum gate valve 9 for evacuating the vertical vacuum tank. In this embodiment, the vacuum system can reduce the pressure inside the vertical vacuum tank to 5 × 10⁻⁶. -4 Pa.

[0022] The top cover 3 of the vertical vacuum tank is connected to the tank body 2 via a stainless steel hinge, forming a flip-top structure. The flanges of the top cover and the tank body are sealed with O-rings. Six hot cathode discharge filaments 17 are installed inside the top cover 3, arranged in groups of three. One end of each group of filaments 17 is connected to form a common terminal 17a, and the other end is a non-common terminal 17b. Both the common terminal 17a and the non-common terminal 17b are led out from the top cover 3 to form wiring control terminals for power connection. The two groups of hot cathode discharge filaments 17 are arranged symmetrically, and the non-common terminals 17b of the six filaments 17 are evenly distributed along the circumference of the top cover 3. The discharge voltage of the hot cathode discharge filaments 17 is 0-150 volts, and the discharge current is 0-200 mA. The heating voltage of the hot cathode discharge filaments is 7.5-10 volts, and the heating current is 3-5 A.

Claims

1. An atomic oxygen exposure apparatus, characterized by comprising: The invention includes a vertical vacuum tank and a vacuum system. The vertical vacuum tank includes a tank body and a top cover. The top cover is used to open and close the top of the tank body. The vacuum system is connected to the tank body to evacuate the tank body. The inner side of the top cover is provided with several thermionic discharge filaments. The outer wall of the tank body is provided with a multi-pole magnetic field confinement system to form a multi-pole confinement magnetic field inside the tank body. The tank body is provided with an oxygen inlet port. The tank body is provided with a test bench.

2. The atomic oxygen exposure apparatus according to claim 1, wherein One end of each of the several hot cathode discharge filaments is connected to form a common terminal, and the common terminal and the non-common terminal of the hot cathode discharge filament are respectively led out from the top cover to form a wiring control terminal.

3. The atomic oxygen exposure apparatus according to claim 2, wherein The non-common ends of the hot cathode discharge filament are evenly distributed along the circumference of the top cover.

4. The atomic oxygen experimental apparatus according to claim 1, characterized in that, The multi-pole magnetic field confinement system includes several permanent magnets, which are uniformly distributed on the outer wall of the tank.

5. The atomic oxygen experimental apparatus according to claim 4, characterized in that, The outer wall of the tank is provided with a sandwich layer, and the permanent magnet is disposed in the sandwich layer.

6. The atomic oxygen experimental apparatus according to claim 1, characterized in that, The bottom of the tank is provided with a vertical threaded cavity, and the bottom surface of the test bench is provided with a screw that mates with the vertical threaded cavity.

7. The atomic oxygen experimental apparatus according to claim 1, characterized in that, The tank body has several observation windows on its wall.

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