Window for star simulator and star simulator

Abstract

The utility model provides a star imitator and a window used for the star imitator, the star imitator comprises a vacuum chamber and a Dewar tank, the window is used for being arranged in an annular cavity between the vacuum chamber and the Dewar tank, the window comprises a cylinder and a cooling part, the cylinder is of a single-layer structure, and the cooling part is arranged in the cylinder. Comprising a first part, a second part and a third part which are sequentially and fixedly connected in the length direction, the end, away from the second part, of the first part is fixedly connected with the wall of the vacuum chamber, the end, away from the second part, of the third part is fixedly connected with the wall of the Dewar tank, and the first part and the third part are each of a rigid cylindrical structure. The second part is of a corrugated cylindrical structure; the cooling part is fixed on the inner side of the first part. The window is of a single-layer cylindrical structure, the window can be utilized to the maximum extent, enough space is provided for a follow-up auxiliary machine system, the temperature of the window is reduced in an active cooling mode, and the thermal load on the superconducting magnet is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of stellarator, especially relates to a window for stellarator and stellarator with the window. BACKGROUND

[0002] The window of the stellarator mainly provides a passage for auxiliary systems of the stellarator, such as a diagnostic system and a heating system. One end of the window is connected to a vacuum chamber, and the other end is connected to a dewar. The temperature of the vacuum chamber can reach 200 DEG C during operation and baking, and the temperature of the dewar is normal. A stellarator magnet is located between the vacuum chamber and the dewar. The commonly used window is a double-layer structure like a tokamak. Due to the twisted shape of the stellarator magnet and the vacuum chamber, there are limited positions where the window can be opened. In order to maximize the use of the window space, the window with a double-layer structure cannot be applied to the stellarator. In addition, since the window is connected to the vacuum chamber, the temperature of the window is relatively high, and the window area is directly adjacent to the magnet. The high temperature can cause a lot of heat radiation to the magnet, and the existing window can easily cause the magnet to lose superconductivity and the reaction to stop. SUMMARY

[0003] The utility model discloses a window for stellarator, stellarator includes vacuum chamber and dewar, and the annular cavity is formed between vacuum chamber and dewar, and the window is arranged in the annular cavity, and the window includes: barrel and cooling part, the barrel is single-layer structure, and includes first portion, second portion and third portion fixedly connected in sequence along its length direction, the first portion is fixedly connected with the wall of vacuum chamber at the end away from the second portion, the third portion is fixedly connected with the tank wall of dewar at the end away from the second portion, the first portion and third portion are arranged as rigid cylindrical structure, and the second portion is arranged as corrugated cylindrical structure, and the cooling part is fixed to the inner side of the first portion.

[0004] To solve the above technical problems, the utility model discloses a window for stellarator, stellarator includes vacuum chamber and dewar, and the annular cavity is formed between vacuum chamber and dewar, and the window is arranged in the annular cavity, and the window includes: barrel and cooling part, the barrel is single-layer structure, and includes first portion, second portion and third portion fixedly connected in sequence along its length direction, the first portion is fixedly connected with the wall of vacuum chamber at the end away from the second portion, the third portion is fixedly connected with the tank wall of dewar at the end away from the second portion, the first portion and third portion are arranged as rigid cylindrical structure, and the second portion is arranged as corrugated cylindrical structure, and the cooling part is fixed to the inner side of the first portion.

[0005] The window comprises a cylinder and a cooling part, the cylinder is arranged as a single-layer cylindrical structure, the internal space of the cylinder can be increased, and the window can be maximally utilized to provide sufficient space for subsequent auxiliary systems such as heating and diagnosis systems.

[0006] According to another specific embodiment of the present application, the window for the stellarator disclosed by the present application is characterized in that the cooling part is a cooling bushing, the cooling bushing is sleeved on the inner side of the first part, and the two ends of the cooling bushing along the length direction thereof extend to the two end portions of the first part along the length direction thereof respectively, and the internal wall of the cooling bushing is formed with a cooling channel.

[0007] According to the above technical solution, the temperature of the first part of the window is actively reduced by flowing the cooling medium in the cooling channel, and the thermal load on the superconducting magnet is reduced.

[0008] According to another specific embodiment of the present application, the window for the stellarator disclosed by the present application is characterized in that the cooling channel extends from one end to the other end of the cooling bushing along the length direction thereof and is distributed on the entire internal wall of the cooling bushing in the circumferential direction thereof.

[0009] According to the above technical solution, the cooling channel is distributed on the entire internal wall of the cooling bushing and extends from one end to the other end of the cooling bushing along the length direction thereof, so that the area of the cooling channel can be increased, and the cooling effect on the window can be ensured.

[0010] According to another specific embodiment of the present application, the window for the stellarator disclosed by the present application is characterized in that the cooling channel extends in an S shape in the internal wall of the cooling bushing, the cooling channel has a channel inlet and a channel outlet, the channel inlet is located at the lowermost position in the gravity direction of the cooling bushing, and the channel outlet is located at the uppermost position in the gravity direction of the cooling bushing.

[0011] The technical scheme is adopted, the cooling channel is arranged to extend in an S shape, the length of the cooling channel can be increased, the cooling efficiency is improved, and the cooling medium is more uniformly arranged on the peripheral wall of the cooling liner, and the uniformity of cooling is improved. The channel inlet is arranged at the lowermost position in the gravity direction of the cooling liner, the channel outlet is arranged at the uppermost position in the gravity direction of the cooling liner, a lower-in upper-out structure is formed, the cooling medium flows from the channel inlet at the lowermost position to the channel outlet at the uppermost position in the extension direction of the cooling channel by using external thrust (for example, pump thrust), and the cooling medium can fill the whole cooling channel due to the effect of its own gravity during the flow of the cooling medium, the heat exchange efficiency between the cooling medium and the cooling liner is improved, and the cooling effect is improved.

[0012] According to another specific embodiment of the present application, the embodiment of the present application discloses a window for a star simulator, the cooling channel forms two cooling sub-channels after the channel inlet.

[0013] The technical scheme is adopted, the cooling channel forms two cooling sub-channels after the channel inlet, the flow rate of the cooling medium in the cooling channel is improved by flow splitting, the cooling efficiency is improved, and the redundancy function is provided, the basic cooling can be maintained by the other cooling sub-channel when one cooling sub-channel is blocked, and the reliability is higher.

[0014] According to another specific embodiment of the present application, the embodiment of the present application discloses a window for a star simulator, the cooling liner is detachably fixed to the inner side of the first part through a connecting assembly; the connecting assembly comprises a plurality of connecting parts arranged at intervals in the circumferential direction of the cooling liner and the length direction of the cooling liner, and each connecting part is fixedly connected between the peripheral wall of the cooling liner and the barrel wall of the first part.

[0015] The technical scheme is adopted, the cooling liner is fixed to the inner side of the first part of the barrel through the plurality of connecting parts arranged in the circumferential direction of the cooling liner and the length direction of the cooling liner, and the stability of the connection between the cooling liner and the first part of the barrel can be ensured.

[0016] According to another specific embodiment of the present application, the embodiment of the present application discloses a window for a star simulator, each connecting part comprises: a first pad, a second pad and a threaded connecting piece, the first pad is fixed to the inner wall surface of the barrel wall of the first part, the cooling liner is provided with a threaded hole in the radial direction, the second pad is located on the inner side of the cooling liner, one end of the threaded connecting piece passes through the second pad and the threaded hole in sequence and is inserted into the first pad, the first pad is abutted between the cooling liner and the first part, and the second pad is abutted between the end portion of the other end of the threaded connecting piece and the cooling liner.

[0017] By adopting the above technical solution, by setting the first pad, the second pad, and the threaded connector, not only is a detachable connection between the cooling bushing and the first part achieved, but also localized concentrated stress can be avoided from damaging the cooling bushing and the first part.

[0018] According to another specific embodiment of the present invention, the window for a stellarator disclosed in the embodiment of the present invention has a groove on the outer wall surface of the peripheral wall of the cooling bushing that is adapted to a first pad, and the first pad abuts against the groove of the cooling bushing.

[0019] By adopting the above technical solution, by setting a groove and abutting the first pad in the groove of the cooling bushing, rotation of the two can be prevented when the cooling bushing is fixed to the inner side of the first part.

[0020] According to another specific embodiment of the present invention, the window for a stellarator disclosed in this embodiment further includes a flange and a cover plate. The flange is fixed at the end of the third part away from the second part, and the cover plate is fixed on the side of the flange away from the third part. The flange and cover plate are used to be installed on the outside of the Dewar canister. The window also includes an inlet pipe and an outlet pipe. One end of the inlet pipe is connected to the inlet of the cooling channel in the cooling bushing, and one end of the outlet pipe is connected to the outlet of the channel. The other ends of the inlet pipe and the outlet pipe both extend through the flange and the cover plate to the outside of the cover plate.

[0021] By adopting the above technical solution, by setting flanges and covers on the outside of the Dewar tank, it is possible to facilitate the connection between the window and the external auxiliary systems, the tank for storing cooling medium, etc. of the Dewar tank.

[0022] This utility model also discloses a stellarator, including a vacuum chamber, a Dewar jar, and the aforementioned window for stellarator. An annular cavity is formed between the vacuum chamber and the Dewar jar, and the window is disposed in the annular cavity. A first through hole is provided on the wall of the vacuum chamber, and a second through hole is provided on the wall of the Dewar jar. The first part of the window, away from the second part, passes through the first through hole and is fixedly connected to the wall of the vacuum chamber. The third part, away from the second part, passes through the second through hole and is fixedly connected to the wall of the Dewar jar.

[0023] The beneficial effects of this invention are as follows: This invention provides a window for a stellarator and a stellarator. The window includes a cylindrical body and a cooling section. The cylindrical body is configured as a single-layer cylindrical structure, which, compared to a double-layer structure, maximizes the use of the window and provides sufficient space for subsequent auxiliary systems such as heating and diagnostic systems. The window includes a first part, a second part, and a third part that are fixedly connected along its length. The cooling section is located inside the first part and is used to cool the first part of the window, enabling the window to have its own cooling function. This achieves active cooling to reduce the temperature of the window and reduce the thermal load on the superconducting magnet. In addition, the second part of the cylindrical body is configured as a corrugated cylindrical structure, which can expand, contract, and bend within a certain range, accommodating the relative movement between the Dewar jar and the vacuum chamber during operation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the stellarator structure according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the window for a stellarator according to an embodiment of the present invention;

[0026] Figure 3 This is a cross-sectional view of the window for a stellarator according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the cooling bushing for the window of a stellarator according to an embodiment of the present invention;

[0028] Figure 5 This is a perspective structural diagram of the cooling bushing for the window of a stellarator according to an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10. Vacuum chamber; 20. Dewar jar; 30. Annular cavity; 40. Window; 100. Cylinder; 110. First part; 120. Second part; 130. Third part; 200. Cooling bushing; 210. Cooling channel; 211. Channel inlet; 212. Channel outlet; 300. Connecting part; 310. First pad; 320. Second pad; 330. Threaded connector; 340. Groove; 400. Flange; 500. Cover plate. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Example 1

[0032] This invention provides a window for a stellarator, such as... Figure 1As shown, the stellarator includes a vacuum chamber 10 and a Dewar jar 20, with an annular cavity 30 formed between the vacuum chamber 10 and the Dewar jar 20. A window 40 is provided within the annular cavity 30. It should be noted that the stellarator magnet ( Figure 1 (Not shown in the image) is located in the annular cavity 30.

[0033] like Figure 2 As shown, window 40 includes: a cylinder 100 and a cooling section. The cylinder 100 is a single-layer structure and includes sections along its length ( Figure 2 The first part 110, the second part 120, and the third part 130 are sequentially fixedly connected in direction A in the diagram, meaning that the first part 110, the second part 120, and the third part 130 are all cylindrical structures. The end of the first part 110 furthest from the second part 120 (i.e.,...) Figure 2 The left end of the first part 110 is used for fixed connection with the wall of the vacuum chamber, and the end of the third part 130 away from the second part 120 (i.e. Figure 2 The right end of the third part 130 is used to fix it to the wall of the Dewar can. Both the first part 110 and the third part 130 are set as rigid cylindrical structures, that is, both the first part 110 and the third part 130 are rigid tubes with high strength, low deformation and impact resistance. The second part 120 is set as a corrugated cylindrical structure, that is, the second part 120 is a corrugated tube, which can expand and bend within a certain range. The cooling part is fixed to the inside of the first part 110.

[0034] It should be noted that the fixed connection methods include, but are not limited to, welding, bonding, and threaded connections. During installation, the first part 110 and the third part 130 can be fixedly connected to the walls of the vacuum chamber and the Dewar jar, respectively, before the second part 120 is connected to the first part 110 and the third part 130. The cooling section is used to cool the first part 110 of the cylinder 100. The cooling section can be a cooling pipe fixed inside the first part 110, with the entire cavity of the cooling pipe used for the flow of cooling medium; the cooling section can also be a sleeve fixed inside the first part 110, with a channel provided in the sleeve wall for the flow of cooling medium; the cooling section can also be other structures that can be used to cool the first part 110. The cooling medium can be liquids such as cooling water and liquid nitrogen.

[0035] Specifically, the cylindrical body 100 of window 40 is configured as a single-layer cylindrical structure. Compared to a double-layer structure, this increases the internal space of the cylindrical body 100, maximizing the utilization of window 40 and providing sufficient space for subsequent auxiliary systems such as heating and diagnostic systems. The cylindrical body 100 includes a first part 110, a second part 120, and a third part 130 sequentially fixedly connected along its length. A cooling section is provided inside the first part 110 to cool window 40, achieving active cooling to reduce the temperature of window 40 and decrease the thermal load on the superconducting magnet. Furthermore, the second part 120 of the cylindrical body 100 is configured as a corrugated cylindrical structure, capable of expansion, contraction, and bending within a certain range, accommodating the relative movement between the Dewar jar and the vacuum chamber during operation.

[0036] In one embodiment of this utility model, such as Figure 2 and Figure 3 As shown, the cooling section is a cooling bushing 200, which is sleeved on the inner side of the first part 110. That is, the cooling bushing 200 has a cylindrical structure. The two ends of the cooling bushing 200 extend to the two ends of the first part 110 along its length direction. A cooling channel 210 is formed inside the peripheral wall of the cooling bushing 200, which is used for the flow of cooling medium.

[0037] Specifically, the length direction of the cooling bushing 200, the length direction of the first portion 110, and the length direction of the cylinder 100 are parallel. A cooling channel 210 is formed inside the peripheral wall of the cooling bushing 200, and the temperature of the first portion 110 of the window 40 is actively reduced by circulating a cooling medium in the cooling channel 210, thereby reducing the thermal load on the superconducting magnet.

[0038] In one embodiment of this utility model, such as Figure 4 and Figure 5 As shown, the cooling channel 210 extends in an S-shape within the peripheral wall of the cooling bushing 200. This not only increases the length of the cooling channel 210 and improves cooling efficiency, but also allows the cooling medium to be distributed more evenly across the peripheral wall of the cooling bushing 200, improving cooling uniformity. The cooling channel 210 has a channel inlet 211 and a channel outlet 212. The channel inlet 211 is located at the lowest point in the direction of gravity of the cooling bushing 200, and the channel outlet 212 is located at the highest point in the direction of gravity of the cooling bushing 200. This forms a bottom-in, top-out structure. The cooling medium, propelled by external force (e.g., pump thrust), flows from the lowest channel inlet 211 along the extension direction of the cooling channel 210 and exits from the highest channel outlet 212. During the flow of the cooling medium, its own gravity allows it to fill the entire cooling channel 210, increasing the heat exchange efficiency between the cooling medium and the cooling bushing 200 and improving the cooling effect.

[0039] It should be noted that "channel inlet 211 is located at the lowest point in the direction of gravity of cooling bushing 200" means that after window 40 is installed between vacuum chamber and Dewar jar, channel inlet 211 is located at the lowest point of the entire cooling channel 210 along the direction of gravity of cooling bushing 200. Similarly, "channel outlet 212 is located at the highest point in the direction of gravity of cooling bushing 200" means that after window 40 is installed between vacuum chamber and Dewar jar, channel outlet 212 is located at the highest point of the entire cooling channel 210 along the direction of gravity of cooling bushing 200. Figure 5 As shown, if the axial direction of the cooling bushing 200 after installation (i.e., the length direction of the cooling bushing 200), Figure 5 The direction A in the figure is parallel to the horizontal direction, and the direction of gravity of the cooling bushing 200 is the vertical direction. Figure 5 (in the C direction).

[0040] In one embodiment of this utility model, such as Figure 5 As shown, the cooling channel 210 forms two cooling sub-channels after the channel inlet 211, and the two cooling sub-channels converge at the channel outlet 212. In this way, the cooling medium flows in from the channel inlet 211 and is divided into two paths, which can increase the flow rate of the cooling medium in the cooling channel 210, improve the cooling efficiency, and provide redundancy. If one cooling sub-channel is blocked, the other cooling sub-channel can still maintain basic cooling, thus improving reliability.

[0041] It should be noted that in this embodiment, more cooling sub-channels can be formed after the channel inlet 211, such as 3 or 4.

[0042] In one embodiment of this utility model, such as Figure 3 As shown, the cooling bushing 200 is detachably secured to the inside of the first part 110 by a connecting assembly; the connecting assembly includes components in the circumferential direction of the cooling bushing 200. Figure 3 Multiple connecting portions 300 are spaced apart in the B direction of the cooling bushing 200 and the length direction of the cooling bushing 200. Each connecting portion 300 is fixedly connected between the peripheral wall of the cooling bushing 200 and the cylinder wall of the first part 110, which can ensure the stability of the connection between the cooling bushing 200 and the first part 110 of the cylinder 100, and at the same time facilitate the disassembly of the cooling bushing 200 and the first part 110.

[0043] Specifically, each connecting part 300 can be a matching bolt or screw structure, or a screw structure, or a matching slot and protrusion structure, or other structures that enable a detachable connection between the cooling bushing 200 and the first part 110. For example, each connecting part 300 can be a screw structure, where the screw passes through the sleeve wall of the cooling bushing 200 along its thickness direction from its inside and is inserted into the cylinder wall of the first part 110 to achieve a detachable connection (i.e., threaded connection) between the cooling bushing 200 and the first part 110. Another example is that each connecting part 300 can be a matching slot and protrusion structure, where the slot and protrusion are respectively fixed to the inner wall surface of the cylinder wall of the first part 110 and the outer wall surface of the sleeve wall of the cooling bushing 200, achieving a detachable connection (i.e., snap-fit) between the cooling bushing 200 and the first part 110 through the snap-fit ​​of the slot and protrusion.

[0044] It should be noted that the spacing and number of the multiple connecting parts 300 in the circumferential and longitudinal directions of the cooling bushing 200 are not specifically limited in this embodiment. They can be set according to actual needs, as long as they are sufficient to ensure the stability of the connection between the cooling bushing 200 and the first part 110 of the cylinder 100.

[0045] In one embodiment of this utility model, such as Figure 3 As shown, each connecting part 300 includes: a first pad 310, a second pad 320, and a threaded connector 330. The first pad 310 is fixed to the inner wall surface of the cylinder wall of the first part 110. The cooling bushing 200 has a threaded hole along its radial direction (i.e., the thickness direction of the cooling bushing 200). The second pad 320 is located inside the cooling bushing 200. One end of the threaded connector 330 passes through the second pad 320 and the threaded hole in sequence, and then is inserted into the first pad 310. The first pad 310 abuts between the cooling bushing 200 and the first part 110. The second pad 320 abuts between the other end of the threaded connector 330 and the cooling bushing 200. This not only achieves a detachable connection between the cooling bushing 200 and the first part 110, but also avoids damage to the cooling bushing 200 and the first part 110 caused by localized concentrated stress.

[0046] Specifically, the first pad 310 can be made of stainless steel, and as... Figure 3 As shown, the cross-section of the first pad 310 (the cross-section perpendicular to the length direction of the first portion 110) is wedge-shaped. The threaded connector 330 refers to a connector with external threads, such as a screw. When the threaded connector 330 is a screw, the second pad 320 is adapted to the shape of the screw head and can abut between the screw head and the cooling bushing 200.

[0047] In one embodiment of this utility model, such as Figure 3 andFigure 4 As shown, the outer wall surface of the peripheral wall of the cooling bushing 200 is provided with a groove 340 that matches the first pad 310, and the first pad 310 abuts against the groove 340 of the cooling bushing 200. When the cooling bushing 200 is fixed to the inner side of the first part 110, rotation between the two can be prevented, and the length of the threaded connector 330 inserted into the first pad 310 can be increased to ensure the stability of the connection between the cooling bushing 200 and the first part 110. Specifically, as Figure 3 As shown, the cross-section of the groove 340 (the cross-section perpendicular to the length direction of the cooling bushing 200) is also wedge-shaped.

[0048] In one embodiment of this utility model, such as Figure 2 As shown, window 40 also includes flange 400 and cover plate 500, flange 400 being fixed to the end of third part 130 away from second part 120 (i.e. Figure 2 (right end), cover plate 500 is fixed to the side of flange 400 away from the third part 130 (i.e. Figure 2 (On the right side of the image), flange 400 and cover plate 500 are used for mounting on the exterior of the Dewar flask. Specifically, the flange 400 and cover plate 500 can be fixed in the following ways: Figure 1 The bolt and nut connection shown can also be another type of fixed connection, such as welding or snap-fit. Window 40 also includes an inlet pipe and an outlet pipe (not shown in the figure). One end of the inlet pipe is connected to the channel inlet 211 of the cooling channel 210 in the cooling bushing 200, and one end of the outlet pipe is connected to the channel outlet 212. The other ends of the inlet pipe and the outlet pipe extend through the flange 400 and the cover plate 500 to the outside of the cover plate 500 for connection to the tank (not shown in the figure) storing the cooling medium.

[0049] By providing flange 400 and cover plate 500 on the outside of the Dewar tank, it is possible to facilitate the connection of window 40 with external auxiliary systems, storage tanks for cooling media, etc. Example 2

[0050] This utility model also provides a stellarator, such as Figure 1 As shown, the device includes a vacuum chamber 10, a Dewar jar 20, and a window 40 for a stellarator as described in Embodiment 1. An annular cavity 30 is formed between the vacuum chamber 10 and the Dewar jar 20, and the window 40 is disposed in the annular cavity 30. A first through hole is provided on the wall of the vacuum chamber 10, and a second through hole is provided on the wall of the Dewar jar 20. The first part of the window 40, with one end away from the second part, passes through the first through hole and is fixedly connected to the wall of the vacuum chamber 10. The third part, with one end away from the second part, passes through the second through hole and is fixedly connected to the wall of the Dewar jar 20.

[0051] Specifically, the vacuum chamber 10 and the Dewar jar 20 are connected through window 40. Window 40 is a single-layer cylindrical structure, which, compared to a double-layer structure, maximizes the utilization of window 40 and provides sufficient space for subsequent auxiliary systems such as heating and diagnostic systems. A cooling unit is located inside the first part to cool the first section of window 40, enabling window 40 to have its own cooling function. This active cooling method reduces the temperature of window 40 and decreases the thermal load on the superconducting magnet. Furthermore, window 40 incorporates a corrugated cylindrical structure, allowing it to expand, contract, and bend within a certain range, accommodating the relative movement between the Dewar jar 20 and the vacuum chamber 10 during operation.

[0052] It should be noted that, in addition to the specific embodiments described above, those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to that embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived from the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0053] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0054] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0055] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0056] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0057] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A window for a stellarator, the stellarator comprising a vacuum chamber and a Dewar jar, wherein an annular cavity is formed between the vacuum chamber and the Dewar jar, and the window is disposed within the annular cavity, characterized in that, The window includes: The cylindrical body is a single-layer structure and includes a first part, a second part and a third part that are fixedly connected in sequence along its length. The end of the first part away from the second part is fixedly connected to the wall of the vacuum chamber, and the end of the third part away from the second part is fixedly connected to the wall of the Dewar jar. The first part and the third part are both set as rigid cylindrical structures, and the second part is set as a corrugated cylindrical structure. A cooling section is fixed to the inside of the first part.

2. The window for a stellarator as described in claim 1, characterized in that, The cooling section is a cooling bushing, which is fitted inside the first part. The cooling bushing extends from both ends along its length to the two ends along its length of the first part. A cooling channel is formed inside the peripheral wall of the cooling bushing, which is used for the flow of cooling medium.

3. The window for a stellarator as described in claim 2, characterized in that, The cooling channels extend from one end of the cooling bushing along its length to the other end and are distributed circumferentially across the entire circumferential wall of the cooling bushing.

4. The window for a stellarator as described in claim 3, characterized in that, The cooling channel extends in an S-shape within the peripheral wall of the cooling bushing; The cooling channel has a channel inlet and a channel outlet. The channel inlet is located at the lowest point in the direction of gravity of the cooling bushing, and the channel outlet is located at the highest point in the direction of gravity of the cooling bushing.

5. The window for a stellarator as described in claim 4, characterized in that, The cooling channel forms two sub-channels after the channel inlet, and the two sub-channels converge at the channel outlet.

6. The window for a stellarator as described in claim 2, characterized in that, The cooling bushing is detachably secured to the inside of the first part via a connecting assembly; The connecting assembly includes a plurality of connecting portions spaced apart in the circumferential and longitudinal directions of the cooling bushing, each connecting portion being fixedly connected between the circumferential wall of the cooling bushing and the cylindrical wall of the first part.

7. The window for a stellarator as described in claim 6, characterized in that, Each of the connecting parts includes: a first pad, a second pad, and a threaded connector. The first pad is fixed to the inner wall surface of the cylinder wall of the first part. The cooling bushing has a threaded hole along its radial direction. The second pad is located inside the cooling bushing. One end of the threaded connector passes through the second pad and the threaded hole in sequence and is inserted into the first pad. The first pad abuts between the cooling bushing and the first part. The second pad abuts between the other end of the threaded connector and the cooling bushing.

8. The window for a stellarator as described in claim 7, characterized in that, The outer wall surface of the peripheral wall of the cooling bushing is provided with a groove that matches the first pad, and the first pad abuts against the groove of the cooling bushing.

9. The window for a stellarator as described in any one of claims 1-8, characterized in that, The window also includes a flange and a cover plate, the flange being fixed to the end of the third part away from the second part, and the cover plate being fixed to the side of the flange away from the third part, the flange and the cover plate being used to be disposed on the outside of the Dewar jar; The window also includes an inlet pipe and an outlet pipe. One end of the inlet pipe is connected to the inlet of the cooling channel in the cooling bushing, and one end of the outlet pipe is connected to the outlet of the channel. The other ends of the inlet pipe and the outlet pipe both extend through the flange and the cover plate to the outside of the cover plate.

10. A stellarator, characterized in that, Includes a vacuum chamber, a Dewar jar, and a window for a stellarator as described in any one of claims 1-9; The vacuum chamber has a first through hole in its wall, and the Dewar jar has a second through hole in its wall. The end of the first part of the window that is away from the second part passes through the first through hole and is fixedly connected to the wall of the vacuum chamber. The end of the third part that is away from the second part passes through the second through hole and is fixedly connected to the wall of the Dewar jar.

Images