Laser inertial confinement fusion science popularization demonstration device

Abstract

The utility model provides a laser inertial confinement fusion science popularization demonstration device comprising a spherical cavity, and the surface of the spherical cavity is provided with a plurality of observation ports and installation ports; the optical assembly is radially mounted on the spherical cavity and is used for generating a laser light source and simulating and displaying generation of laser, and a light path and multiple paths of laser are focused and gathered; the center positioning device is installed in the spherical cavity in the radial direction, a lighting lamp bead is installed on the vertex of the center positioning device, and the vertex is located in the center of the spherical cavity. The control circuit is used for controlling the optical assembly and lightening the lamp beads. The utility model discloses a science popularization demonstration device for laser inertial confinement fusion, which simulates and demonstrates scientific processes such as a laser inertial confinement fusion environment carrier, laser beam collection, fusion'lightening 'and the like through technologies of light, electricity, related display and the like, and aims to realize scientific demonstration of the laser inertial confinement fusion through visual demonstration and interactive operation. And the audience can more deeply understand laser inertial confinement fusion and photoelectricity and optics related subject knowledge.

Description

Technical Field

[0001] The utility model relates to the technical field of popular science demonstrations, and more specifically, to a popular science demonstration device for laser inertial confinement fusion. Background Art

[0002] Almost all types of energy on Earth come directly or indirectly from the sun, and the solar energy comes from the nuclear fusion of hydrogen atoms inside it. Since the mid-20th century, in order to find a cleaner, more efficient, and sustainable "solar-like" energy source, scientists have been working hard to study various methods, and laser inertial confinement fusion is one of the most cutting-edge solutions.

[0003] With the development of laser technology, in 1963, Soviet scientist N. Basov and in 1964, Chinese scientist Wang Ganchang independently proposed the idea of using lasers to irradiate fusion fuel targets to achieve controlled thermonuclear fusion reactions, opening up a new way to achieve controlled thermonuclear fusion reactions - laser inertial confinement fusion.

[0004] The core principle of laser inertial confinement fusion is precisely to attempt to simulate the high-temperature and high-pressure "fusion" environment of the sun's core on Earth. In a vacuum environment, through powerful high-power lasers, scientists can create extreme conditions similar to the sun within an extremely short transient time range. Hydrogen isotope "deuterium, tritium" fuels are induced to undergo fusion reactions in this environment.

[0005] After more than fifty years of efforts, great progress has been made in the research of laser inertial confinement fusion. Currently, countries such as the United States, Russia, France, and China have made a large amount of investment in this field and built large-scale laser experimental facilities. For example, the National Ignition Facility (NIF) in the United States, the Laser MegaJoule (LMJ) in France, and the Shenguang series in China.

[0006] The research of laser inertial confinement fusion is of great significance. On the one hand, it has opened up a new path for humanity to explore future clean energy. If it can be successfully achieved and applied, it will bring great hope for solving the energy crisis. On the other hand, it also promotes the continuous progress of science and technology, prompting us to make new breakthroughs in multiple fields such as materials science and optics.

[0007] However, in current popular science publicity and education, the popular science corresponding to the most cutting-edge science and technology of laser inertial confinement fusion is extremely scarce. It often relies on professional books and journals and lacks vivid, intuitive, and interactive display means. Students and the public have an abstract understanding of "laser inertial confinement fusion" and it is difficult to form a deep understanding. Content of the Utility Model

[0008] To solve the technical problems existing in the above-mentioned background art, the present utility model provides a popular science demonstration device for laser inertial confinement fusion.

[0009] The present utility model provides a popular science demonstration device for laser inertial confinement fusion, comprising:

[0010] A spherical cavity, on the surface of which there are provided a plurality of observation ports and mounting ports;

[0011] An optical component, radially mounted on the spherical cavity, for generating a laser light source and simulating and demonstrating the generation of laser, the light path, and the focusing and convergence of multiple lasers;

[0012] A central positioning device, radially mounted inside the spherical cavity, on the vertex of which a lighting lamp bead is mounted, and the vertex is located at the center of the spherical cavity;

[0013] A control circuit, for controlling the optical component and the lighting lamp bead.

[0014] In some embodiments, a plurality of type-I observation ports and type-II observation ports are provided on the equator line of the spherical cavity, the type-I observation ports are provided at 0 degrees and 180 degrees of the longitude of the spherical cavity, and the type-II observation ports are evenly distributed between the two type-I observation ports; type-III observation ports are respectively provided at the north and south poles of the spherical cavity.

[0015] In some embodiments, 4 optical mounting ports are respectively and evenly provided on the 60-degree north latitude line, 45.5-degree north latitude line, 60-degree south latitude line, and 45.5-degree south latitude line of the spherical cavity, and the optical component is fixed on the spherical cavity through the optical mounting ports.

[0016] In some embodiments, 22 groups of monitoring devices are mounted on the spherical cavity, 2 groups of monitoring devices are symmetrically arranged at the top and bottom of the spherical cavity; 18 groups of monitoring devices are evenly distributed between the optical component and the type-II observation holes, and 10 groups of the 18 groups of monitoring devices are mounted in the northern hemisphere of the spherical cavity, and 8 groups are mounted in the southern hemisphere of the spherical cavity.

[0017] In some embodiments, the optical component comprises a base, inside which there are provided multi-stage through holes and grooves, and inside the base, a protective filter lens, a light source constant current driving board, a light source, an expanding plano-convex lens, a collimating plano-convex lens, a narrow-band filter, and a coated plano-convex lens are sequentially mounted from top to bottom; the bottom of the base is connected to the spherical cavity and forms a light path.

[0018] In some embodiments, the central positioning device comprises a support frame with a hollow structure, a positioning pin is centrally penetrated through the support frame, the inner end of the positioning pin is connected to a conical head, and the outer end of the positioning pin is connected to an adjusting device.

[0019] In some embodiments, both ends of the positioning pin are respectively connected to the conical head and the adjusting device through threads, and two lighting beads are symmetrically installed on the left and right of the conical head.

[0020] In some embodiments, dot lasers are respectively installed on two groups of monitoring devices arranged at the top of the spherical cavity. Two laser beams respectively pass through the central origin of the monitoring device located at the bottom of the spherical cavity, and the intersection point of the two laser beams in the center of the spherical cavity forms an auxiliary trajectory of the center point of the spherical cavity.

[0021] In some embodiments, the central axes of the optical component, the central positioning device, and the monitoring device all pass through the center point of the spherical cavity.

[0022] In some embodiments, the central positioning device is installed on one of the type-II observation ports.

[0023] The beneficial effects of the present utility model are as follows:

[0024] The present utility model discloses a laser inertial confinement fusion popular science demonstration device, which simulates and demonstrates scientific processes such as the carrier of the laser inertial confinement fusion environment, the convergence of laser beams, and the "ignition" of fusion through technologies such as light, electricity, and related displays. The aim is to enable the audience to more deeply understand "laser inertial confinement fusion" and knowledge related to optoelectronics and optics through intuitive demonstrations and interactive operations. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the present utility model;

[0026] Figure 2 is a front view of the present utility model;

[0027] Figure 3 is a schematic structural diagram of the optical component of the present utility model;

[0028] In the figure: 1 - spherical cavity, 2 - optical component, 3 - central positioning device, 4 - type-I observation port, 5 - type-II observation port, 6 - type-III observation port, 7 - monitoring device, 8 - support frame, 9 - positioning pin, 10 - conical head, 11 - adjusting device. Detailed Embodiments

[0029] The following describes exemplary embodiments of the present disclosure, including various details of the embodiments of the present disclosure to facilitate understanding. It should be considered that they are merely exemplary. Therefore, those of ordinary skill in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0030] Please refer to Figures 1-3, an embodiment of the present utility model discloses a laser inertial confinement fusion popular science demonstration device, including: a spherical cavity 1, an optical component 2, a central positioning device 3, and a control circuit.

[0031] The central axes of the optical component 2, the central positioning device 3, and the monitoring device 7 all pass through the center point of the spherical cavity 1.

[0032] A plurality of observation ports and installation ports are provided on the surface of the spherical cavity 1; the optical component 2 is radially installed on the spherical cavity 1, and is used to generate a laser light source and simulate and display the generation of laser, the light path, and the focusing and convergence of multiple lasers; the central positioning device 3 is radially installed inside the spherical cavity 1, and a lighting lamp bead is installed on the vertex of the central positioning device 3, and the vertex is located at the center of the spherical cavity 1; the control circuit is used to control the optical component 2 and the lighting lamp bead.

[0033] Among them, a plurality of type-I observation ports 4 and type-II observation ports 5 are provided on the equator line of the spherical cavity 1. The type-I observation ports 4 are provided at 0 degrees and 180 degrees of longitude of the spherical cavity 1, and the type-II observation ports 5 are evenly distributed between the two type-I observation ports 4; type-III observation ports 6 are respectively provided at the north and south poles of the spherical cavity 1. Four optical installation ports are evenly provided on the 60-degree north latitude line, 45.5-degree north latitude line, 60-degree south latitude line, and 45.5-degree south latitude line of the spherical cavity 1, and the optical component 2 is fixed on the spherical cavity 1 through the optical installation ports.

[0034] 22 groups of monitoring devices 7 are installed on the spherical cavity 1, and 2 groups of monitoring devices 7 are symmetrically arranged at the top and bottom of the spherical cavity 1; 18 groups of monitoring devices 7 are evenly distributed between the optical component 2 and the type-II observation holes. Among the 18 groups of monitoring devices 7, 10 groups are installed in the northern hemisphere of the spherical cavity 1, and 8 groups are installed in the southern hemisphere of the spherical cavity 1.

[0035] Dot lasers are respectively installed on the 2 groups of monitoring devices 7 provided at the top of the spherical cavity 1. Two laser beams respectively pass through the central origin of the monitoring device 7 located at the bottom of the spherical cavity 1, and the intersection point of the two laser beams at the center of the spherical cavity 1 forms an auxiliary trajectory of the center point of the spherical cavity 1.

[0036] Specifically, the optical component 2 includes a base. A multi-stage through hole groove is provided inside the base. A protective filter lens, a light source constant current drive board, a light source, an expanding plano-convex lens, a collimating plano-convex lens, a narrowband filter, and a coated plano-convex lens are sequentially installed from top to bottom inside the base; the bottom of the base is connected to the spherical cavity 1 and forms a light path.

[0037] A direction groove with a thickness of 4 mm and a length and width of 20*20 mm is provided at the top of the base for fixing the protective filter lens;

[0038] A round hole with a diameter of 18 mm and a length of 25 mm is opened in the middle section of the base for installing the constant current drive board of the light source; a round hole with a diameter of 8 mm and a length of 6 mm is opened in the middle section of the base for installing the light source component with a power of 20 to 50 mW, 405 nm blue-violet light or 650 nm red light. Considering the demonstration effect, the safety power does not exceed 50 mW;

[0039] A round hole with a diameter of 15.5 mm and a length of 20 mm is opened in the middle section of the base, and a secondary slot is opened at an interval of 8 mm on the round hole. The diameter of the slot is 16 mm and the width is 1.2 mm, which is used for installing an expander plano-convex lens to expand the point light source and installing a collimating convex lens to collimate the light source after expansion;

[0040] A round hole with a diameter of 13.5 mm and a length of 20 mm is opened in the middle section of the base, and a secondary slot is opened at an interval of 2 mm on the round hole. The diameter of the slot is 14 mm and the width is 1.2 mm, which is used for installing a 405 nm narrow-band filter to improve the monochromaticity of the light wave and installing a coated plano-convex lens with a focal length of 187 - 192 mm to focus the collimated light beam at the center point of the spherical cavity 1;

[0041] A flange ring is provided at the bottom of the base, and the inner diameter opening and outer diameter size match the installation opening of the optical component 2 reserved in the cavity, which is used to connect with the spherical cavity 1 and form an optical path;

[0042] The central positioning device 3 includes a support frame 8 with a hollow structure. A positioning pin 9 is arranged through the center of the support frame 8. The inner end of the positioning pin 9 is connected to a conical head 10, and the outer end of the positioning pin 9 is connected to an adjusting device 11; both ends of the positioning pin 9 are connected to the conical head 10 and the adjusting device 11 through threads respectively, and two lighted lamp beads are symmetrically installed on the left and right of the conical head 10. The central positioning device 3 is installed on one of the type II observation ports 5.

[0043] In this embodiment, the laser inertial confinement fusion popular science demonstration device mainly consists of a spherical cavity 1, an optical component 2, a central positioning device 3, a drive and control circuit.

[0044] The spherical cavity 1 serves as the carrier of laser inertial confinement fusion popular science, simulating and demonstrating the core working environment of laser inertial confinement fusion, and its main structure is the spherical cavity 1 structure.

[0045] The diameter of the spherical cavity 1 forms a constraint relationship with the focus of the laser beam of the optical component 2.

[0046] Taking the "352 - 16 type" cavity as an example, the inner diameter of the spherical cavity 1 is 344 mm, the outer diameter is 352 mm, and the cavity wall thickness is 4 mm; in terms of the casting process of the spherical cavity 1, it is cast with transparent resin and 3D printing;

[0047] There are 2 type-I observation ports 4, 6 type-II observation ports 5, and 2 type-III observation ports 6 distributed on the spherical cavity 1, which are mainly used to observe scientific processes such as laser beam convergence and fusion "ignition".

[0048] The type-I observation port 4 is set on the equator line of the spherical cavity 1, at the symmetric points with longitudes of 0 degrees and 180 degrees, forming a point-plane perpendicularity with the center point of the cavity; it is mainly used to observe the laser beam and the fusion demonstration effect; in addition, it is used for the installation and debugging of the internal equipment and facilities of this popular science device; the diameter of the type-I observation port 43 is 150 mm, the thickness of the interface flange ring is 5 mm, the outer diameter of the flange ring is 160 mm, the connection wall thickness is 5 mm, and the inner diameter of the flange ring is grooved 2 mm * 3 mm; the inner and outer diameters of the large observation cover plate match the connection flange ring of the type-I observation hole, with a thickness of 5 mm, the inner diameter of the flange ring is grooved 2 mm * 3 mm, and a protective glass with a reserved grooved installation diameter of 155 mm and a thickness of 4 mm is provided; it is fixed with 6 M3 * 8 mm socket head cap screws.

[0049] The type-II observation port 5 is set on the equator line of the spherical cavity 1, with 3 type-II observation ports 5 equally distributed at equal intervals between two type-I observation ports 4, forming a point-plane perpendicularity with the center point of the cavity. It is mainly used to observe the laser beam and the fusion demonstration effect; in addition, one of them is used to fix the central positioning device 3; the hole diameter of the type-II observation port 5 is 75 mm, the thickness of the interface flange ring is 5 mm, the outer diameter of the flange ring is 85 mm, the connection wall thickness is 5 mm, and the inner diameter of the flange ring is grooved 2 mm * 3 mm; the inner and outer diameters of the small observation cover plate match the connection flange ring of the type-II observation port 5, with a thickness of 5 mm, the inner diameter of the flange ring is grooved 2 mm * 3 mm, and a protective glass with a reserved grooved installation diameter of 80 mm and a thickness of 4 mm is provided; it is fixed with 4 M3 * 8 mm socket head cap screws.

[0050] The type-III observation port 6 is set at the north and south poles of the spherical cavity 1, forming a point-plane perpendicularity with the center point of the cavity. The north pole observation port is mainly used to observe the focusing situation of the laser beam center point and the fusion demonstration effect from top to bottom; the south pole observation port is mainly used for the installation and debugging of the internal equipment and facilities of this popular science device and equipment fixation; the hole diameter of the type-III observation port 6 is 90 mm, the thickness of the interface flange ring is 5 mm, the outer diameter of the flange ring is 100 mm, the connection wall thickness is 5 mm, and the inner diameter of the flange ring is grooved 2 mm * 3 mm; the inner and outer diameters of the cover plate of the type-III observation port 6 match the connection flange ring, with a thickness of 5 mm, the inner diameter of the flange ring is grooved 2 mm * 3 mm, and a protective glass with a reserved grooved installation diameter of 95 mm and a thickness of 4 mm is provided; it is fixed with 6 M3 * 8 mm socket head cap screws.

[0051] There are 16 optical component 2 installation ports distributed on the spherical cavity 1 for connecting the optical component 2 and passing the laser beam; there are 22 monitoring device 7 installation ports distributed on the spherical cavity 1 for the central positioning device 3 to trace and the cavity to be towed, etc.

[0052] Among them, on the spherical cavity 1, there are 4 installation ports for the optical components 2 evenly distributed on the 60-degree line and the 45.5-degree line of the north latitude (N), forming a point-plane perpendicularity with the center point of the cavity; on the spherical cavity 1, there are 4 installation ports for the optical components 2 evenly distributed on the 60-degree line and the 45.5-degree line of the south latitude (S), forming a point-plane perpendicularity with the center point of the cavity. The hole diameter of the installation port of the optical component 2 is 18 mm, the thickness of the interface flange ring is 4 mm, and the outer diameter of the flange ring is 40 mm, which is used to connect the optical component 2, and the optical component 2 is fixed with 4 M3*8 mm hexagon socket head cap screws;

[0053] The optical component 2 serves as a popular science laser light source for laser inertial confinement fusion, simulating and demonstrating scientific knowledge such as the generation of laser, the optical path, and the focusing and convergence of multiple lasers. Its base is of a symmetrical structure, with multiple levels of through-hole grooves inside, and is fastened and combined into a whole through screws. For the specific distribution, detailed structure diagrams and descriptions;

[0054] The top section of the base is grooved for fixing the protective filter lens and subsequent extended connection; the middle section of the base is grooved for installing the constant current drive board of the light source, which is used to drive the light source to generate low-power demonstration laser. There is a through-hole for the power cord of the drive board on the upper base for power supply and TTL adjustment; the middle section of the base is grooved for installing the light source component, with a power of 20 to 50 mW, 405 nm blue-violet light or 650 nm red light. Considering the demonstration effect, the safe power does not exceed 50 mW; the middle section of the base is grooved for installing plano-convex lenses and convex lenses. The outer diameter size of the lens matches the inner diameter size of the through-hole groove, which is used for the beam expansion and collimation of the laser point light source; the middle section of the base is grooved for installing narrow-band filter lenses and plano-convex lenses. The outer diameter sizes of the narrow-band filter lens and the lens match the inner diameter size of the through-hole groove, which is used for the narrow-channel filtering of collimated light and the focusing and convergence of the center point of the cavity; the bottom of the base is provided with a flange ring, and the inner diameter opening and the outer diameter size match the reserved installation port of the optical component 2 in the cavity, which is used to connect with the spherical cavity 1 to form an optical path;

[0055] The upper and lower bases of the optical component 2 are of a symmetrical structure, with multiple levels of through-hole grooves inside, and are fastened and combined into a whole through 4 M3*16 mm screws;

[0056] The central positioning device 3 serves as the carrier for the "ignition" of popular science fusion of laser inertial confinement fusion. Its vertex is located at the center of the spherical cavity 1, carrying the "ignition" lamp beads. Its main body is connected to a type-II observation hole and is perpendicular to the spherical cavity 1;

[0057] The support frame 8 is of a hollow structure, with a central positioning pin 9 of the spherical cavity 1 passing through it. The positioning pin 9 has a threaded structure at both ends, one end connected to the weight adjustment device 11 and the other end connected to the conical head 10;

[0058] On the conical head 10 of the central positioning device 3, two high-brightness LED lamp beads (color temperature 6500K) are symmetrically installed on the left and right, which are used to display the "lighting" effect of the fusion. At the same time, rotate the thread of the conical head 10 to extend or shorten the net length of the central positioning device 3, which is used to change the front and back position of the vertex of the conical head 10 of the central positioning device 3 at the center point of the spherical cavity 1 to ensure that it is consistent with the radius of the spherical cavity 1.

[0059] By adjusting the counterweight adjusting device 11, the up and down position of the vertex of the conical head 10 of the central positioning device 3 at the center point of the spherical cavity 1 can be changed, and the left and right position of the vertex of the conical head 10 of the central positioning device 3 at the center point of the spherical cavity 1 can also be changed; through adjustment, to ensure that the vertex of the conical head 10 of the central positioning device 3 is at the center point of the spherical cavity 1.

[0060] On the top and bottom of the spherical cavity 1, two groups of monitoring device 7 mounting ports are symmetrically distributed, which are perpendicular to the center point of the cavity in a point-plane manner, mainly used for the point-assisted positioning of the central positioning device 3 of the spherical cavity 1; between the mounting ports of the optical component 2 and the type I observation port 4 and the type II observation port 5, 18 monitoring device 7 mounting ports are symmetrically distributed, which are used for equipment reinforcement, etc.;

[0061] The hole diameter of the monitoring device 7 mounting port is 12mm, the thickness of the interface flange ring is 3mm, the outer diameter of the flange ring is 22mm, and the connection wall thickness is 3mm; the outer diameter of the flange ring of the cover of the monitoring device 7 mounting port is 22.5mm, the thickness is 3mm, and the cover plate is fixed with 4 M3*8mm socket head cap screws;

[0062] On the two groups of monitoring device 7 mounting ports located in the upper part of the spherical cavity 1, 5mW, 650nm dot lasers are respectively installed. The two laser beams respectively pass through the center origin of the monitoring device 7 interface in the lower part of the spherical cavity 1 (symmetrical with the upper part on-site). The intersection point of the two laser beams at the center of the spherical cavity 1 forms an auxiliary trajectory of the center point of the spherical cavity 1.

[0063] The constant current drive and control circuit is composed of an embedded processor and a controller. Models such as STC8F2K64S2 / 8F2K32S2 can be used for the MCU selection;

[0064] The MCU reserves more than 18 I / O output interfaces. Among them, 16 are used for the control of the constant current drive board of the optical component 2; 1 is used for the control of the LED lamp beads of the central positioning device 3, etc.; 1 is used for the control of the cavity reflection medium (such as smoke); the 405nm laser light source is driven by a constant current drive composed of LM358S and D882 field effect transistors, and the output power of the light source is controlled by the TTL method.

[0065] The negative pole of the constant current drive board is connected to the corresponding interfaces of the 1-16 channels of the control board, and the positive pole of the constant current drive board and the positive pole of the TTL control signal terminal are jointly connected to the positive 5V interface of the power supply. At the same time, the negative pole of the power supply of the constant current drive board is connected to the negative pole of the power supply control board, and the positive pole is correspondingly connected to the positive pole of the power supply control board.

[0066] The control board writes a program to control the optical path to achieve the effect of gradually lighting up the 1-16 channels; in the programming environment adopted by the board, the control pins corresponding to the 1-16 channel optical paths are clearly defined and initialized. Construct a loop structure with the starting value set to 1, incrementing by 1 as the step size until reaching 16. In each round of loop execution, first set the pin level corresponding to the optical path lit in the previous round to low level to ensure that the optical path is extinguished. Set the pin level corresponding to the optical path in the current loop to high level to achieve the lighting operation of this optical path. For a clearly distinguishable gradually lighting effect, after successfully lighting a new optical path pin each time, introduce a reasonable delay function. The duration of this delay needs to be precisely adjusted according to the actual application scenario and the expected visual presentation effect.

[0067] The utility model discloses a laser inertial confinement fusion popular science demonstration device, which simulates and demonstrates scientific processes such as the carrier of the laser inertial confinement fusion environment, the convergence of laser beams, and the "ignition" of fusion through technologies such as light, electricity, and related displays, aiming to enable the audience to more deeply understand "laser inertial confinement fusion" and knowledge related to optoelectronics and optics through intuitive demonstrations and interactive operations.

[0068] The above specific implementation manners do not constitute a limitation on the protection scope of the present disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A laser inertial confinement fusion science demonstration device, characterized in that: include: A spherical cavity, wherein a plurality of observation ports and installation ports are provided on the surface of the spherical cavity; Optical components, radially mounted on the spherical cavity, are used to generate laser light sources and simulate the generation of lasers, light paths, and multi-path laser focusing and collection; A center positioning device is radially installed in the spherical cavity, a lighting lamp bead is installed on the vertex of the center positioning device, and the vertex is located at the center of the spherical cavity; The control circuit is used to control the optical components and light up the lamp beads.

2. The laser inertial confinement fusion science demonstration device according to claim 1, characterized in that: A plurality of type I observation ports and type II observation ports are provided on the equator of the spherical cavity, wherein the type I observation ports are provided at longitudes of 0 and 180 degrees of the spherical cavity, and the type II observation ports are evenly distributed between two type I observation ports; type III observation ports are provided at the north and south poles of the spherical cavity, respectively.

3. The laser inertial confinement fusion science demonstration device according to claim 1, characterized in that: The spherical cavity is evenly provided with four optical mounting openings on the 60 degree north latitude line, the 45.5 degree north latitude line, the 60 degree south latitude line and the 45.5 degree south latitude line, respectively, and the optical assembly is fixed on the spherical cavity through the optical mounting openings.

4. The laser inertial confinement fusion science demonstration device according to claim 1, characterized in that: There are 22 groups of monitoring equipment installed on the spherical cavity, and 2 groups of monitoring equipment are symmetrically arranged on the top and bottom of the spherical cavity; 18 groups of monitoring equipment are evenly distributed between the optical component and the type II observation hole, and 10 of the 18 groups of monitoring equipment are installed in the northern hemisphere of the spherical cavity, and 8 are installed in the southern hemisphere of the spherical cavity.

5. The laser inertial confinement fusion science demonstration device according to claim 1, characterized in that: The optical component includes a base, in which multiple levels of through-hole grooves are provided, and a protective filter lens, a light source constant current driving board, a light source, a beam expanding plano-convex lens, a collimating convex lens, a narrow-band filter and a coated plano-convex lens are installed in the base from top to bottom; the bottom of the base is connected to the spherical cavity to form a light path.

6. The laser inertial confinement fusion science demonstration device according to claim 1, characterized in that: The center positioning device comprises a support frame with a hollow structure, a positioning needle is arranged through the center of the support frame, the inner end of the positioning needle is connected to a conical head, and the outer end of the positioning needle is connected to an adjustment device.

7. The laser inertial confinement fusion science demonstration device according to claim 6, characterized in that: The two ends of the positioning needle are connected to the conical head and the adjusting device through threads, and two lighting lamp beads are symmetrically installed on the conical head.

8. The laser inertial confinement fusion science demonstration device according to claim 4, characterized in that: Point lasers are respectively installed on the two groups of monitoring devices arranged on the top of the spherical cavity. The two laser beams respectively pass through the central origin of the monitoring device located at the bottom of the spherical cavity, and the intersection of the two laser beams at the center of the spherical cavity forms an auxiliary trajectory of the center point of the spherical cavity.

9. The laser inertial confinement fusion science demonstration device according to claim 4, characterized in that: The central axes of the optical component, the center positioning device and the monitoring equipment all pass through the center point of the spherical cavity.

10. The laser inertial confinement fusion science demonstration device according to claim 2, characterized in that: The center positioning device is installed on one of the type II observation ports.

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