Teaching demonstration device for spallation neutron source microscopic operation principle

Abstract

The utility model relates to the technical field of spallation neutron sources, in particular to a spallation neutron source microscopic operation principle teaching demonstration device, which comprises a gravity ball, a linear acceleration track, an annular acceleration track, an annular acceleration device, a target shooting transmission track and a target seat, the target shooting transmission track is in lap joint with the annular acceleration track and the target seat, the annular acceleration device is used for accelerating the gravity ball, and the annular acceleration track is provided with a tracking sensor; the rail changing assembly is used for communicating the annular acceleration rail with the target shooting transmission rail, the target seat is provided with a plurality of target shooting simulation lamp strips and a control button, and the target shooting simulation lamp strips are distributed in a bundle shape and are all in control connection with the control button; the gravity ball sequentially enters the linear acceleration track, the annular acceleration track and the targeting transmission track and then abuts against the control button. The method has the effects of presenting complex scientific principles in a simple and easy-to-understand manner and improving the scientific literacy of the teenagers.

Description

Technical Field

[0001] The utility model relates to the technical field of spallation neutron sources, in particular to a teaching demonstration device for the microscopic operation principle of spallation neutron sources. Background Art

[0002] A spallation neutron source is a device that uses high-energy protons to bombard heavy metal targets to produce high-intensity neutron beams. When high-energy protons hit the target atomic nuclei, strong interactions occur, causing the atomic nuclei to be in a highly excited state. The excited atomic nuclei reduce their energy by releasing neutrons and other secondary particles (such as pions, protons, etc.), a process called "spallation."

[0003] In recent years, the Spallation Neutron Source has carried out popular science visits, including online and offline public science day activities and student field visits, but there is a lack of science and technology education courses for young people, and there is also a lack of teaching demonstration devices required for the courses. Therefore, how to design a teaching demonstration device for the microscopic operation principle of the spallation neutron source so that students can understand the operation principle of the spallation neutron source from the macroscopic demonstration and truly implement science popularization in the classroom. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the present application provides a teaching demonstration device for the microscopic operation principle of a spallation neutron source.

[0005] The above invention objectives of the present application are achieved through the following technical solutions:

[0006] A teaching demonstration device for the microscopic operation principle of a spallation neutron source comprises a gravity ball, a linear acceleration track, a circular acceleration track, a circular acceleration device, a target transmission track, a target seat, and a control panel. The linear acceleration track is tilted and connected to the circular acceleration track. The circular acceleration track and the target transmission track are both horizontally arranged. One end of the target transmission track is overlapped with the circular acceleration track and the other end is overlapped with the target seat. The circular acceleration device is arranged on the circular acceleration track and is used to accelerate the gravity ball. A plurality of tracking sensors are arranged on the circular acceleration track. A tracking sensor is used to monitor the speed of the gravity ball passing through, and a track-changing assembly is provided between the circular acceleration track and the target-shooting transmission track. After any of the tracking sensors monitors that the speed of the gravity ball reaches a preset threshold, the track-changing assembly is used to connect the circular acceleration track with the target-shooting transmission track. A plurality of target-shooting simulation light strips are provided at one end of the target seat and a control button is provided at the other end. The plurality of target-shooting simulation light strips are distributed in bundles and are all controlled and connected to the control button. The control panel is control-connected to the circular acceleration device, the tracking sensor and the track-changing assembly.

[0007] The gravity ball sequentially enters the linear acceleration track, the circular acceleration track and the target transmission track and then abuts against the control button.

[0008] By adopting the above technical scheme, the process of proton acceleration to impacting the target material can be intuitively displayed through the physical movement of the gravity ball in the inclined linear acceleration track, the circular acceleration track equipped with a circular acceleration device and the target transmission track, as well as the lighting of the target simulation light strip after the gravity ball abuts the control button. Students can understand the microscopic operation principle of the spallation neutron source from the macroscopic phenomenon, enhance their sense of participation and interest in learning, and the device presents complex scientific principles in a simple and easy-to-understand way, which helps to popularize science in the classroom and improve the scientific literacy of young people.

[0009] In a preferred example, the present application can be further configured as follows: the annular acceleration device includes a plurality of mounting rings, which are arranged and sleeved on the annular acceleration track along the circumference direction of the annular acceleration track, each of the mounting rings is wound with an electromagnetic coil and an infrared sensor, the infrared sensor is used to sense the gravity ball, the infrared sensor is controlled and connected to the electromagnetic coil, the electromagnetic coil is electrically connected to an external power supply, and the gravity ball is made of magnetic material.

[0010] By adopting the above technical solution, when the gravity ball enters the circular acceleration track, it starts to pass through the electromagnetic coil on each mounting ring in turn. When the infrared sensor on any mounting ring senses that the gravity ball is close to the electromagnetic coil, it will control the electromagnetic coil to be energized immediately to generate a magnetic field, and provide electromagnetic force to the gravity ball made of magnetic material to push the gravity ball to accelerate. After passing through the corresponding electromagnetic coil, the power is immediately cut off to avoid the gravity ball being decelerated by the magnetic field. The gravity ball continues to move to the next electromagnetic coil under the action of inertia to repeatedly accelerate until the speed reaches the preset threshold, completing the process of simulating the proton circular acceleration. Through the precise control and continuous acceleration of the electromagnetic coil, the gravity ball can obtain a stable and predictable acceleration effect on the circular acceleration track to improve the vividness and intuitiveness of the demonstration process.

[0011] In a preferred example, the present application can be further configured as follows: the track changing assembly includes a steering gear, the steering gear is installed between the annular acceleration track and the target transmission track, the annular acceleration track is provided with a notch corresponding to the position of the steering gear, a supplementary track is installed at the output end of the steering gear, and the steering gear is used to drive the supplementary track to rotate;

[0012] There are a closed position and a connected position on the rotation trajectory of the supplementary track. When the supplementary track rotates to the closed position, the supplementary track overlaps with the notch to form a complete track for the annular acceleration track. When the supplementary track rotates to the connected position, the annular acceleration track is connected to the supplementary track and to the target transmission track.

[0013] By adopting the above technical solution, when the gravity ball accelerates to a preset speed on the circular acceleration track, the tracking sensor sends a signal to the control panel. After receiving the signal, the control system activates the servo to drive the supplementary track to rotate from the closed position to the connected position. In the connected position, the supplementary track is connected to the target transmission track, and the gravity ball is guided to the target transmission track and continues to move toward the target seat to complete the target shooting. When the gravity ball has not reached the preset speed, the servo controls the supplementary track to always be in the closed position, so that the supplementary track overlaps with the gap of the circular acceleration track to form a complete circular track, ensuring that the gravity ball can continue to accelerate along the track. Among them, through the precise control of the servo and the supplementary track, a smooth transition of the gravity ball from the circular acceleration track to the target transmission track is achieved, thereby improving the fluency and viewing experience of the demonstration.

[0014] In a preferred example, the present application can be further configured as follows: the annular acceleration track includes a plurality of metal rings whose sizes gradually decrease from the outside to the inside, and the supplementary track includes a plurality of arc-shaped metal parts whose sizes gradually decrease from the outside to the inside, and when the supplementary track rotates to a closed position, the arc-shaped metal parts correspond one-to-one with the metal rings and form a complete metal ring.

[0015] By adopting the above technical solution, a number of metal rings with decreasing sizes from the outside to the inside are used as a circular acceleration track, which can reduce the energy loss of the gravity ball in the circular acceleration motion, thereby improving the acceleration efficiency, and at the same time facilitate integration with the supplementary track to form a complete circular acceleration track.

[0016] In a preferred example, the present application can be further configured as follows: a spotlight and a focusing plate are provided at the target base, one end of each of the target simulation light strips away from the target base is provided on the focusing plate, the spotlight is provided between a number of the target simulation light strips and the focusing plate and the light is directed toward the focusing plate, and the control button is controlled and connected to the spotlight.

[0017] By adopting the above technical solution, when the gravity ball hits the control button on the target seat, the target shooting simulation light belt is activated, and the spotlight is also lit. The light of the spotlight is focused on the target shooting simulation light belt through the condenser plate, making it emit brighter and more concentrated light. This lighting effect not only enhances the visual effect of the target shooting simulation light belt, but also makes the simulation process of neutron spallation more vivid and intuitive. Students can better understand the working principle of the spallation neutron source by observing the changes in the light.

[0018] In a preferred example, the present application can be further configured as follows: the linear acceleration track and the target shooting transmission track are both tubular conveying channels.

[0019] By adopting the above technical solution and using a tubular conveying channel, the movement range of the gravity ball can be effectively limited to prevent it from deviating from the track.

[0020] In a preferred example, the present application can be further configured as follows: the teaching demonstration device for the microscopic operation principle of the spallation neutron source also includes a path simulation light belt, and the path simulation light belt is respectively arranged on the linear acceleration track, the circular acceleration track and the target transmission track along the length direction of the linear acceleration track, the length direction of the circular acceleration track and the length direction of the target transmission track.

[0021] By adopting the above technical solution and setting a movement simulation light strip, the movement route of the gravity ball can be simulated and reproduced by means of additional lighting to enhance the interest of the demonstration device.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. Through the physical movement of the gravity ball in the inclined linear acceleration track, the circular acceleration track with a circular acceleration device and the target transmission track, as well as the lighting of the target simulation light strip after the gravity ball touches the control button, the process of protons from acceleration to hitting the target can be intuitively displayed, so that students can understand the microscopic operation principle of the spallation neutron source from the macroscopic phenomenon, enhance the sense of participation and interest in learning, and the device presents complex scientific principles in a simple and easy-to-understand way, which helps to popularize science in the classroom and improve the scientific literacy of young people.

[0024] 2. Through the precise control and continuous acceleration of the electromagnetic coil, the gravity ball can obtain a stable and predictable acceleration effect on the circular acceleration track to improve the vividness and intuitiveness of the demonstration process.

[0025] 3. Through the precise control of the servo and the supplementary track, the gravity ball can smoothly transition from the circular acceleration track to the target transmission track, which improves the fluency and viewing experience of the demonstration. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of a teaching demonstration device for the microscopic operation principle of a spallation neutron source in one embodiment of the present application;

[0027] Figure 2 yes Figure 1 A partial enlarged schematic diagram of part A;

[0028] Figure 3 yes Figure 1 A partial enlarged schematic diagram of part B.

[0029] Figure numerals: 1. Gravity ball; 2. Linear acceleration track; 3. Circular acceleration track; 4. Circular acceleration device; 41. Mounting ring; 42. Electromagnetic coil; 43. Infrared sensor; 5. Target transmission track; 6. Target stand; 7. Tracking sensor; 8. Track change assembly; 81. Servo; 82. Notch; 83. Supplementary track; 9. Target simulation light strip; 10. Control button; 11. Spotlight; 12. Spotlight panel; 13. Behavior simulation light strip. DETAILED DESCRIPTION

[0030] The following is a description of exemplary embodiments of the present application in conjunction with the accompanying drawings, including various details of the embodiments of the present application to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0031] It should be noted that the terms "first", "second", etc. in the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure.

[0032] In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally means that the associated objects before and after are in an "or" relationship.

[0033] A device for teaching and demonstrating the microscopic operation principle of a spallation neutron source of the present application will be described below with reference to the accompanying drawings.

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, the teaching demonstration device of the microscopic operation principle of the spallation neutron source includes a gravity ball 1, a linear acceleration track 2, a circular acceleration track 3, a circular acceleration device 4, a target transmission track 5, a target seat 6, and a control panel (not shown in the figure). The linear acceleration track 2 is tilted and connected to the circular acceleration track 3. The circular acceleration track 3 and the target transmission track 5 are both horizontally arranged. One end of the target transmission track 5 is overlapped with the circular acceleration track 3 and the other end is overlapped with the target seat 6. The circular acceleration device 4 is arranged on the circular acceleration track 3 and is used to accelerate the gravity ball 1. A plurality of tracking sensors 7 are arranged on the circular acceleration track 3. The tracking sensors 7 are used to monitor the speed of the gravity ball 1 passing through. A track changing assembly 8 is arranged between the circular acceleration track 3 and the target transmission track 5. After any tracking sensor 7 monitors that the speed of the gravity ball 1 reaches a preset threshold, the track changing assembly 8 is used to connect the circular acceleration track 3 with the target transmission track 5. A plurality of target simulation lights are arranged at one end of the target seat 6. The belt 9 is provided with a control button 10 at the other end, and several target shooting simulation light belts 9 are distributed in a bundle shape and are all controlled and connected to the control button 10. The control panel is controlled and connected to the circular acceleration device 4, the tracking sensor 7 and the track changing assembly 8. During operation, the gravity ball 1 enters the linear acceleration track 2, the circular acceleration track 3 and the target shooting transmission track 5 in sequence and then abuts against the control button 10. Among them, through the physical movement of the gravity ball 1 in the inclined linear acceleration track 2, the circular acceleration track 3 provided with the circular acceleration device 4 and the target shooting transmission track 5, and the lighting of the target shooting simulation light belt 9 after the gravity ball 1 abuts against the control button 10, the process of protons from acceleration to impacting the target material can be intuitively displayed, so that students can understand the microscopic operation principle of the spallation neutron source from the macroscopic phenomenon, enhance the sense of participation and interest in learning, and the device presents complex scientific principles in a simple and easy-to-understand way, which is helpful to popularize science in the classroom and improve the scientific literacy of young people.

[0035] Specifically, the annular acceleration device 4 includes a plurality of mounting rings 41, which are arranged along the circumference direction of the annular acceleration track 3 and sleeved on the annular acceleration track 3. Each mounting ring 41 is wound with an electromagnetic coil 42 and an infrared sensor 43. The infrared sensor 43 is used to sense the gravity ball 1. The infrared sensor 43 is controlled and connected to the electromagnetic coil 42. The electromagnetic coil 42 is electrically connected to an external power supply. The gravity ball 1 is made of magnetic material. When the gravity ball 1 enters the annular acceleration track 3, it begins to pass through the electromagnetic coil 42 on each mounting ring 41 in turn. When the infrared sensor 43 on any mounting ring 41 senses that the gravity ball 1 is close to the electromagnetic coil 42, the infrared sensor 43 on any mounting ring 41 senses that the gravity ball 1 is close to the electromagnetic coil 42. When the electromagnetic coil 42 is passed, the electromagnetic coil 42 will be controlled to be energized immediately to generate a magnetic field, and an electromagnetic force will be provided to the gravity ball 1 made of magnetic material to push the gravity ball 1 to accelerate, and the power will be cut off immediately after passing through the corresponding electromagnetic coil 42 to prevent the gravity ball 1 from being decelerated by the magnetic field. The gravity ball 1 continues to move to the next electromagnetic coil 42 under the action of inertia to repeatedly accelerate until the speed reaches a preset threshold, thereby completing the process of simulating the circular acceleration of the proton, wherein, through the precise control and continuous acceleration of the electromagnetic coil 42, the gravity ball 1 can obtain a stable and predictable acceleration effect on the circular acceleration track 3, so as to improve the vividness and intuitiveness of the demonstration process.

[0036] Preferably, the track-changing assembly 8 comprises a steering gear 81, which is installed between the annular acceleration track 3 and the target-shooting transmission track 5. A notch 82 is provided at a position of the annular acceleration track 3 corresponding to the steering gear 81. A supplementary track 83 is installed at the output end of the steering gear 81. The steering gear 81 is used to drive the supplementary track 83 to rotate, wherein there is a closed position and a connected position on the rotation track of the supplementary track 83. When the supplementary track 83 rotates to the closed position, the supplementary track 83 overlaps with the notch 82 to form a complete track of the annular acceleration track 3. When the supplementary track 83 rotates to the connected position, the annular acceleration track 3 is connected to the supplementary track 83 and to the target-shooting transmission track 5. When the gravity ball 1 accelerates to a preset speed on the annular acceleration track 3, the tracking sensor 7 sends a signal. The control system activates the servo 81 after receiving the signal, so that it drives the supplementary track 83 to rotate from the closed position to the connected position. In the connected position, the supplementary track 83 is connected to the target transmission track 5, and the gravity ball 1 is guided to the target transmission track 5 and continues to move toward the target seat 6 to complete the target shooting. When the gravity ball 1 has not reached the preset speed, the servo 81 controls the supplementary track 83 to always be in the closed position, so that the supplementary track 83 overlaps with the notch 82 of the annular acceleration track 3 to form a complete annular track, ensuring that the gravity ball 1 can continue to accelerate along the track. Among them, through the precise control of the servo 81 and the supplementary track 83, a smooth transition of the gravity ball 1 from the annular acceleration track 3 to the target transmission track 5 is achieved, thereby improving the fluency and viewing experience of the demonstration.

[0037] Furthermore, the circular acceleration track 3 includes a plurality of metal rings whose sizes gradually decrease from the outside to the inside, and the supplementary track 83 includes a plurality of arc-shaped metal parts whose sizes gradually decrease from the outside to the inside. When the supplementary track 83 rotates to a closed position, the arc-shaped metal parts correspond to the metal rings one by one and form a complete metal ring. By using a plurality of metal rings whose sizes gradually decrease from the outside to the inside as the circular acceleration track 3, the energy loss of the gravity ball 1 in the circular acceleration motion can be reduced, and the non-closed track can reduce the interference with the magnetic field acceleration and improve the acceleration efficiency. At the same time, it is easy to integrate with the supplementary track 83 to form a complete circular acceleration track 3, and using metal material as the base material of the circular acceleration track 3 can improve the strength and stability of the circular acceleration track 3.

[0038] In addition, in this embodiment, the linear acceleration track 2 and the target transmission track 5 are both tubular conveying channels. By adopting the tubular conveying channels, the movement range of the gravity ball 1 can be effectively limited to prevent it from deviating from the track.

[0039] Preferably, a spotlight 11 and a focusing plate 12 are provided at the target seat 6, and one end of each target simulation light belt 9 away from the target seat 6 is provided on the focusing plate 12, and the spotlight 11 is provided between the target simulation light belts 9 and the focusing plate 12, and the light is directed toward the focusing plate 12, and the control button 10 is connected to the spotlight 11, wherein, when the gravity ball 1 hits the control button 10 on the target seat 6, the target simulation light belt 9 is activated, and the spotlight 11 is also lit, and the light of the spotlight 11 is focused on the target simulation light belt 9 through the focusing plate 12, so that it emits brighter and more concentrated light, and this lighting effect not only enhances the visual effect of the target simulation light belt 9, but also makes the simulation process of neutron spallation more vivid and intuitive. Students can better understand the working principle of the spallation neutron source by observing the changes in the light.

[0040] In addition, the teaching demonstration device of the microscopic operation principle of the spallation neutron source also includes a behavior simulation light strip 13, and the behavior simulation light strip 13 is respectively arranged on the linear acceleration track 2, the circular acceleration track 3 and the target transmission track 5 along the length direction of the linear acceleration track 2, the length direction of the circular acceleration track 3 and the length direction of the target transmission track 5. By setting the behavior simulation light strip 13, the movement route of the gravity ball 1 can be simulated and reproduced by means of lights to enhance the fun of the demonstration device.

[0041] It should be noted that the flashing modes of the above-mentioned target shooting simulation light strip 9 and the behavior simulation light strip 13 can be controlled by the control panel. In actual operation, starting from the behavior simulation light strip 13 at the linear acceleration track 2, the lights on the behavior simulation light strip 13 flash one by one to cooperate with the gravity ball 1 to simulate the process of proton linear acceleration, proton circular acceleration and high-energy proton targeting in turn. The specific control procedures of the target shooting simulation light strip 9, the behavior simulation light strip 13 and the control panel are common knowledge of technicians in this field and will not be elaborated here.

[0042] The implementation principle of the teaching demonstration device of the microscopic operation principle of a spallation neutron source of the present application is as follows: at the beginning of the demonstration, a gravity ball 1 for simulating protons is placed at the starting position of a linear acceleration track 2. Due to the inclined setting of the linear acceleration track 2, the gravity ball 1 begins to slide down along the track under the action of gravity and enters a linear acceleration process to obtain a certain initial speed to prepare for subsequent circular acceleration. After entering the circular acceleration track 3, the gravity ball 1 is continuously accelerated under the action of the circular acceleration device 4. When the tracking sensor 7 on the circular acceleration track 3 monitors that the speed of the gravity ball 1 reaches a preset value, the gravity ball 1 is accelerated to a certain speed. When the gravity ball 1 reaches the threshold, it indicates that the gravity ball 1 has enough energy for the next step of "target shooting". At this time, the track changing assembly 8 is started to connect the annular acceleration track 3 with the target shooting transmission track 5. The gravity ball 1 is then transmitted to the target shooting transmission track 5 and finally abuts against the control button 10 on the target stand 6. When the gravity ball 1 presses the control button 10, a number of beam-shaped target shooting simulation light strips 9 on the target stand 6 are activated to simulate the generation and spallation process of the neutron beam. The lighting of the target shooting simulation light strips 9 symbolizes the neutrons and other secondary particles released after the high-energy protons hit the target material, thereby completing the demonstration process of the spallation neutron source.

[0043] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A teaching demonstration device for the microscopic operation principle of a spallation neutron source, characterized in that: include: A gravity ball (1), a linear acceleration track (2), an annular acceleration track (3), an annular acceleration device (4), a target shooting transmission track (5), a target seat (6), and a control panel. The linear acceleration track (2) is arranged obliquely and connected to the annular acceleration track (3). The annular acceleration track (3) and the target shooting transmission track (5) are both arranged horizontally. One end of the target shooting transmission track (5) is overlapped with the annular acceleration track (3) and the other end is overlapped with the target seat (6). The annular acceleration device (4) is arranged on the annular acceleration track (3) and is used to accelerate the gravity ball (1). A plurality of tracking sensors (7) are arranged on the annular acceleration track (3). The tracking sensors (7) are used to monitor The speed of the gravity ball (1) passing through, a track changing assembly (8) is arranged between the circular acceleration track (3) and the target shooting transmission track (5), after any of the tracking sensors (7) monitors that the speed of the gravity ball (1) reaches a preset threshold, the track changing assembly (8) is used to connect the circular acceleration track (3) with the target shooting transmission track (5), one end of the target seat (6) is provided with a plurality of target shooting simulation light strips (9) and the other end is provided with a control button (10), the plurality of target shooting simulation light strips (9) are distributed in a bundle shape and are all controlled and connected to the control button (10), and the control panel is control-connected to the circular acceleration device (4), the tracking sensor (7) and the track changing assembly (8); The gravity ball (1) sequentially enters the linear acceleration track (2), the annular acceleration track (3) and the target shooting transmission track (5) and then abuts against the control button (10).

2. A spallation neutron source microscopic operation principle teaching demonstration device as claimed in claim 1, characterized in that: The annular acceleration device (4) comprises a plurality of mounting rings (41), which are arranged along the circumference direction of the annular acceleration track (3) and sleeved on the annular acceleration track (3). Each of the mounting rings (41) is wound with an electromagnetic coil (42) and an infrared sensor (43). The infrared sensor (43) is used to sense the gravity ball (1). The infrared sensor (43) is control-connected to the electromagnetic coil (42). The electromagnetic coil (42) is electrically connected to an external power supply. The gravity ball (1) is made of magnetic material.

3. A spallation neutron source microscopic operation principle teaching demonstration device as claimed in claim 1, characterized in that: The track changing assembly (8) comprises a steering gear (81), the steering gear (81) being installed between the annular acceleration track (3) and the target practice transmission track (5), the annular acceleration track (3) being provided with a notch (82) at a position corresponding to the steering gear (81), a supplementary track (83) being installed at an output end of the steering gear (81), and the steering gear (81) being used to drive the supplementary track (83) to rotate; The rotation track of the supplementary track (83) has a closed position and a connected position. When the supplementary track (83) rotates to the closed position, the supplementary track (83) overlaps and cooperates with the notch (82) so that the annular acceleration track (3) forms a complete track. When the supplementary track (83) rotates to the connected position, the annular acceleration track (3) is connected to the supplementary track (83) and to the target shooting transmission track (5).

4. A spallation neutron source micro-operation principle teaching demonstration device as claimed in claim 3, characterized in that: The annular acceleration track (3) comprises a plurality of metal rings whose sizes gradually decrease from the outside to the inside, and the supplementary track (83) comprises a plurality of arc-shaped metal pieces whose sizes gradually decrease from the outside to the inside. When the supplementary track (83) rotates to a closed position, the arc-shaped metal pieces correspond one-to-one with the metal rings to form a complete metal ring.

5. A spallation neutron source micro-operation principle teaching demonstration device as claimed in claim 1, characterized in that: A spotlight (11) and a focusing plate (12) are arranged at the target base (6); one end of each of the target simulation light strips (9) away from the target base (6) is arranged on the focusing plate (12); the spotlight (11) is arranged between a plurality of the target simulation light strips (9) and the focusing plate (12) and the light is directed toward the focusing plate (12); and the control button (10) is connected to the spotlight (11) for control.

6. A spallation neutron source micro-operation principle teaching demonstration device as claimed in claim 1, characterized in that: The linear acceleration track (2) and the target shooting transmission track (5) are both tubular transmission channels.

7. A spallation neutron source micro-operation principle teaching demonstration device as claimed in claim 1, characterized in that: The invention also comprises a path simulation light strip (13), wherein the path simulation light strip (13) is respectively arranged on the linear acceleration track (2), the circular acceleration track (3) and the target shooting transmission track (5) along the length direction of the linear acceleration track (2), the length direction of the circular acceleration track (3) and the length direction of the target shooting transmission track (5).

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