Deflection magnet and magnetic deflection device having the same

Abstract

The present invention discloses a deflection magnet and a magnetic deflection device having the same. The deflection magnet, belonging to the technical field of magnetic deflection devices, comprises a magnet frame, a magnetic pole sheath, and at least one magnet coil. The magnet coil is at least partially mounted between the magnet frame and the magnetic pole sheath to prevent particles from directly impacting the magnet frame and the magnet coil. A sheath cooling medium flowing through a sheath cooling flow path removes heat from the magnetic pole sheath. A coil cooling medium flowing through a coil cooling flow path removes heat from the magnet coil, thereby reducing the temperature of the magnetic pole sheath and the magnet coil. Multiple coil units of the magnet coil each have a coil cooling branch, forming multiple parallel coil cooling branches. This rapidly reduces the temperature of the magnet coil and improves the heat dissipation efficiency of the magnet coil.

Description

Technical Field

[0001] The present invention relates to the field of magnetic deflection devices, in particular to a deflection magnet and a magnetic deflection device having the same. Background Art

[0002] Neutral beam injection (NBI) is an important component of the high-power auxiliary heating and current drive system for controlled nuclear fusion. The magnetic deflection device of the neutral beam injection system can be used to separate charged particles in the beam to obtain pure neutral particles.

[0003] In related technologies, a magnetic deflection device uses a coil of its deflection magnet to generate a magnetic field when energized to deflect charged particles and separate them from neutral particles. This generates a lot of heat, and particles easily collide with the deflection magnet, generating heat. This causes the deflection magnet to be overheated, making stable operation difficult. Summary of the Invention

[0004] The present invention aims to at least partially solve the technical problem of high temperature of deflection magnets in the prior art. To this end, the present invention provides a deflection magnet that can quickly reduce the temperature of the deflection magnet.

[0005] The present invention also provides a magnetic deflection device having the deflection magnet.

[0006] According to an embodiment of the present invention, a deflection magnet includes: a magnet frame, which defines a central channel; a pole sleeve, which is at least partially disposed in the central channel and defines a particle channel in the central channel, the pole sleeve having a sleeve cooling flow path, a first inlet and a first outlet, the first inlet being connected to the first outlet through the sleeve cooling flow path; at least one magnet coil, which is at least partially installed between the magnet frame and the pole sleeve, and deflects charged particles passing through the particle channel when energized, the magnet coil having a coil cooling flow path, a second inlet and a second outlet, the second inlet being connected to the second outlet through the coil cooling flow path; wherein the magnet coil includes: a plurality of coil units, the plurality of coil units forming a series circuit, each of the coil units having a coil cooling branch, and the plurality of coil cooling branches being connected in parallel between the second inlet and the second outlet to form the coil cooling flow path.

[0007] According to the deflection magnet of an embodiment of the present invention, the magnet coil is at least partially installed between the magnet frame and the pole shield. The pole shield can protect the magnet frame and the magnet coil to prevent particles from directly impacting the magnet frame and the magnet coil. The jacket cooling medium can take away the heat of the pole shield when flowing through the jacket cooling flow path. The coil cooling medium can take away the heat of the magnet coil when flowing through the coil cooling flow path to reduce the temperature of the pole shield and the magnet coil. Among them, the multiple coil units of the magnet coil all have coil cooling branches to form multiple parallel coil cooling branches, which can quickly reduce the temperature of the magnet coil and improve the heat dissipation efficiency of the magnet coil, thereby facilitating the stable and reliable operation of the deflection magnet.

[0008] According to some embodiments of the present invention, the coil unit includes: a hollow cable, an inlet connector and an outlet connector, the hollow cable is wound inside the magnet frame, the two ends of the hollow cable are respectively connected to the inlet connector and the outlet connector to form the coil cooling branch, and the inlet connector and the outlet connector are passed through and fixed to the magnet frame.

[0009] According to some embodiments of the present invention, the magnet coil further comprises: a coil mounting box, the coil mounting box being sandwiched between the magnet frame and the pole sheath, and at least a portion of the hollow cable being located within the coil mounting box.

[0010] According to some embodiments of the present invention, the magnet frame includes a top plate, a first side plate, a bottom plate and a second side plate connected end to end in sequence, the top plate, the first side plate, the bottom plate and the second side plate jointly define the middle channel, the first side plate and the second side plate are arranged opposite to and in parallel, and the top plate and the bottom plate are partially opposite to and non-parallel; the first side plate and the second side plate are both installed with the magnet coil on the inner side of the middle channel.

[0011] According to some embodiments of the present invention, the pole shield includes: an inner shield assembly, at least a portion of the inner shield assembly is arranged inside the middle channel, and the inner shield assembly corresponds to the inner side of the top plate, the first side plate, the bottom plate and the second side plate facing the middle channel respectively; an outer shield assembly, at least a portion of the outer shield assembly is arranged outside the middle channel, and on the movement path of the particles, at least a portion of the outer shield assembly is arranged on the front side of the magnet frame, and the outer shield assembly corresponds to the front side of the top plate, the first side plate, the bottom plate, the second side plate and the magnet coil respectively; a cooling medium supply pipe, the cooling medium supply pipe has the first inlet; a cooling medium return pipe, the cooling medium return pipe has the first outlet; wherein, the inner shield assembly and the outer shield assembly each include a plurality of hollow pipes connected side by side, each of the hollow pipes is connected in parallel between the cooling medium supply pipe and the cooling medium return pipe.

[0012] According to some embodiments of the present invention, the outer surface of the hollow pipe has a stepped surface, and in any two hollow pipes connected side by side, the stepped surfaces of the two have a gap in the side-by-side direction, and the stepped surfaces of the two are overlapped and connected perpendicular to the side-by-side direction.

[0013] According to some embodiments of the present invention, the magnetic pole sleeve further includes: a bottom sleeve assembly, the bottom sleeve assembly is arranged on the inner side of the inner sleeve assembly away from the magnet frame, and the bottom sleeve assembly is located on the side of the inner sleeve assembly close to the bottom plate and corresponds to the bottom plate, the bottom sleeve assembly includes: an enhanced heat exchange plate, the enhanced heat exchange plate is provided with a cooling groove, the cooling groove includes a first cooling groove, a second cooling groove and a connecting groove, the first cooling groove and the second cooling groove are arranged side by side, the same end of the first cooling groove and the second cooling groove is connected through the connecting groove, the first cooling groove and the A partition ridge is formed between the second cooling grooves, and the partition ridge is provided with a deformation release groove; a heat exchange cover plate, the heat exchange cover plate covers the slot of the cooling groove, the heat exchange cover plate has a first cover plate inlet, a second cover plate inlet, a first cover plate outlet and a second cover plate outlet, the connecting groove is connected with the cooling medium supply pipe through the first cover plate inlet and the second cover plate inlet, the end of the first cooling groove away from the connecting groove is connected with the cooling medium return pipe through the first cover plate outlet, and the end of the second cooling groove away from the connecting groove is connected with the cooling medium return pipe through the second cover plate outlet.

[0014] According to some embodiments of the present invention, the slot opening of the cooling slot is opposite to the bottom plate, and a plurality of auxiliary heat exchange slots are provided at the bottom of the cooling slot.

[0015] According to some embodiments of the present invention, the inner sheath assembly includes: a first pipe assembly, the first pipe assembly includes a plurality of the hollow pipes, and the first pipe assembly corresponds to the inner side of the first side panel, a part of the inner side of the top panel, and a part of the inner side of the bottom panel, respectively; a second pipe assembly, the second pipe assembly includes a plurality of the hollow pipes, and the second pipe assembly corresponds to the inner side of the second side panel, another part of the inner side of the top panel, and another part of the inner side of the bottom panel, respectively.

[0016] According to another embodiment of the present invention, a magnetic deflection device includes: a vacuum box having an installation space, a particle outlet and multiple particle inlets, the particle outlet and the multiple particle inlets are both connected to the installation space; a plurality of deflection magnets, the deflection magnets being the deflection magnets described above, each of the deflection magnets being arranged in the installation space, the multiple deflection magnets corresponding one-to-one to the multiple particle inlets, and the particle channel of each deflection magnet being located between the particle outlet and the corresponding particle inlet.

[0017] According to an embodiment of the magnetic deflection device of the present invention, its magnet coil is at least partially installed between the magnet frame and the pole shield. The pole shield can protect the magnet frame and the magnet coil to prevent particles from directly impacting the magnet frame and the magnet coil. When the shield cooling medium flows through the shield cooling flow path, it can remove heat from the pole shield. When the coil cooling medium flows through the coil cooling flow path, it can remove heat from the magnet coil, thereby reducing the temperature of the pole shield and the magnet coil. In particular, the multiple coil units of the magnet coil each have a coil cooling branch to form multiple parallel coil cooling branches. This can quickly reduce the temperature of the magnet coil and improve the heat dissipation efficiency of the magnet coil, thereby facilitating stable and reliable operation of the magnetic deflection device.

[0018] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a neutral beam injection system according to an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of a deflection magnet according to an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of a magnet frame according to an embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of a cooling medium supply pipe and a cooling medium return pipe according to an embodiment of the present invention;

[0023] Figure 5 is a schematic diagram of multiple coil units connected according to an embodiment of the present invention;

[0024] Figure 6 is a schematic diagram of a magnet coil according to an embodiment of the present invention;

[0025] Figure 7 is a schematic diagram of an inner jacket assembly, an outer jacket assembly, a bottom jacket assembly, and a top jacket assembly according to an embodiment of the present invention;

[0026] Figure 8 is an exploded view of an inner jacket assembly, an outer jacket assembly, a bottom jacket assembly, and a top jacket assembly according to an embodiment of the present invention;

[0027] Figure 9 is a cross-sectional view of a hollow pipe according to an embodiment of the present invention;

[0028] Figure 10 is an exploded view of a bottom jacket assembly according to an embodiment of the present invention;

[0029] Figure 11 yes Figure 10 Enlarged view at point A;

[0030] Figure 12 is a schematic diagram of the internal structure of a deflection magnet at a bottom jacket assembly according to an embodiment of the present invention;

[0031] Figure 13 is a schematic diagram of a magnetic deflection device according to an embodiment of the present invention;

[0032] Figure 14 is a schematic diagram of a bottom bracket according to an embodiment of the present invention;

[0033] Figure 15 is a schematic diagram of a top bracket according to an embodiment of the present invention;

[0034] Figure 16 Schematic diagram of a water-cooling busbar, a deflection magnet, a top bracket, and a bottom bracket according to an embodiment of the present invention.

[0035] Reference numerals:

[0036] Magnet frame 1; top plate 11; top plate through hole 111; first side plate 12; lug 121; bottom plate 13; base 131; double pin hole 1311; second side plate 14; magnetic pole 15; middle channel 16;

[0037] Pole jacket 2; inner jacket assembly 21; first pipeline assembly 211; second pipeline assembly 212; outer jacket assembly 22; cooling medium supply pipe 23; first inlet 231; cooling medium return pipe 24; first outlet 241; bottom jacket assembly 25; enhanced heat exchange plate 251; cooling groove 2511; first cooling groove 25111; second cooling groove 25112; connecting groove 25113; auxiliary heat exchange groove 25114; heat exchange cover plate 252; first cover plate inlet 2521; second cover plate inlet 2522; first cover plate outlet 2523; second cover plate outlet 2524; top jacket assembly 26; particle channel 27;

[0038] Magnetic coil 3; coil unit 31; first coil unit 31a; second coil unit 31b; hollow cable 311; inlet connector 312; outlet connector 313; coil mounting box 32; connecting bridge 33; fixing bracket 34;

[0039] Hollow pipe 41; stepped surface 411; separation ridge 42; deformation relief groove 421;

[0040] Deflection magnet 10; vacuum box 20; particle outlet 201; particle inlet 202; installation space 203; water cooling busbar 30; water supply main pipe 301; return water main pipe 302; bracket 40; top bracket 401; top single latch seat 4011; single latch hole 4012; bottom bracket 402; bottom single latch seat 4021; double latch seat 4022; ion eater 50;

[0041] Magnetic deflection device 100; neutral beam injection system 1000. DETAILED DESCRIPTION

[0042] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0043] In the description of the present invention, it should be understood that the terms "length", "up", "down", "front", "back", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0045] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections, or communication; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0046] The deflection magnet 10 and the magnetic deflection device 100 having the same according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0047] Reference Figure 1-Figure 7 As shown, a deflection magnet 10 according to an embodiment of the present invention includes: a magnet frame 1, a pole shield 2, and at least one magnet coil 3. The magnet frame 1 defines a central channel 16. The pole shield 2 is at least partially disposed within the central channel 16. The pole shield 2 defines a particle channel 27 within the central channel 16. The pole shield 2 has a shield cooling flow path, a first inlet 231, and a first outlet 241. The first inlet 231 is connected to the first outlet 241 through the shield cooling flow path. The magnet coil 3 is at least partially installed between the magnet frame 1 and the pole shield 2. When energized, the magnet coil 3 deflects charged particles passing through the particle channel 27. The magnet coil 3 has a coil cooling flow path, a second inlet, and a second outlet. The second inlet is connected to the second outlet through the coil cooling flow path. The magnet coil 3 includes: a plurality of coil units 31. The plurality of coil units 31 form a series circuit. Each coil unit 31 has a coil cooling branch. The plurality of coil cooling branches are connected in parallel between the second inlet and the second outlet to form the coil cooling flow path.

[0048] It should be noted that the deflection magnet 10 can be used in the magnetic deflection device 100 of the neutral beam injection system 1000. The neutral beam injection system 1000 includes: a particle source, a neutralizer and a magnetic deflection device 100. The magnetic deflection device 100 is provided with the deflection magnet 10 and the ion eater 50. The particle source emits a beam toward the neutralizer. After the beam is neutralized by the neutralizer, high-energy neutral particles and unneutralized charged particles are obtained. When the neutral particles and charged particles pass through the magnetic deflection device 100, the paths of the neutral particles are as follows: Figure 1 As shown by arrow A in the figure, the path of the charged particle is as follows Figure 1 As shown by the arrow B in the figure, most neutral particles can pass through the magnetic deflection device 100 normally, and the charged particles are affected by the Lorentz force in the magnetic field of the deflection magnet 10, so that the trajectory of the charged particles is deflected and they are swallowed by the ion eater 50, thereby filtering the charged particles, obtaining pure neutral particles, and ensuring the injection of the neutral beam.

[0049] It is understandable that the magnetic coil 3 of the deflection magnet 10 generates a magnetic field after being energized, and the magnetic coil 3 generates a large amount of heat after being energized. At the same time, a small number of neutral particles and charged particles easily hit the deflection magnet 10 and generate heat, resulting in a large heat dissipation pressure on the deflection magnet 10.

[0050] Specifically, the deflection magnet 10 includes: a magnet frame 1, a pole sheath 2 and at least one magnet coil 3. The material of the magnet frame 1 can be industrial soft iron. The magnet frame 1 defines a middle channel 16. The pole sheath 2 of the deflection magnet 10 is at least partially arranged in the middle channel 16. That is, a part of the pole sheath 2 can be arranged on the inner side of the magnet frame 1, and another part of the pole sheath 2 can also be arranged on the outer side of the magnet frame 1. The magnet coil 3 is at least partially installed between the magnet frame 1 and the pole sheath 2. When energized, the magnet coil 3 magnetizes the magnet frame 1 and forms a magnetic field. The pole sheath 2 is in the middle channel. A particle channel 27 is defined in the channel 16. After the neutral particles and charged particles enter the particle channel 27, the charged particles are deflected and separated from the neutral particles. Most of the neutral particles and most of the charged particles form different paths after passing through the particle channel 27. The charged particles can be absorbed by the ion eater 50 to achieve the neutralization of the beam. At the same time, a small number of charged particles and a small number of neutral particles will collide with the magnetic pole sheath 2 before passing through the particle channel 27. The magnetic pole sheath 2 can protect the magnet frame 1 and the magnet coil 3 to prevent the particles from directly colliding with the magnet frame 1 and the magnet coil 3.

[0051] The magnetic pole jacket 2 has a jacket cooling flow path, a first inlet 231 and a first outlet 241. The first inlet 231 is connected to the first outlet 241 through the jacket cooling flow path. The jacket cooling medium can flow through the first inlet 231 and the jacket cooling flow path in sequence and then flow out from the first outlet 241 to cool the magnetic pole jacket 2. When particles collide with the magnetic pole jacket 2, heat is generated. The jacket cooling medium flowing through the jacket cooling flow path can take away the heat of the magnetic pole jacket 2 to reduce the temperature of the magnetic pole jacket 2 and prevent the magnetic pole jacket 2 from being overheated and damaged.

[0052] The magnet coil 3 has a coil cooling flow path, a second inlet and a second outlet. The second inlet is connected to the second outlet through the coil cooling flow path. The coil cooling medium can flow through the second inlet, the coil cooling flow path and then flow out from the second outlet in sequence to cool the magnet coil 3. The magnet coil 3 will generate heat when energized. The coil cooling medium flowing through the coil cooling flow path can take away the heat of the magnet coil 3 to reduce the temperature of the magnet coil 3 and prevent the magnet coil 3 from overheating and damage.

[0053] The magnet coil 3 includes: a plurality of coil units 31, the plurality of coil units 31 form a series circuit, each coil unit 31 has a coil cooling branch, and the plurality of coil cooling branches are connected in parallel between the second inlet and the second outlet to form a coil cooling flow path.

[0054] It can be understood that in the circuit of the magnetic coil 3, multiple coil units 31 are electrically connected in sequence to form a series circuit to ensure the total length of the magnetic coil 3 so that the magnetic field strength generated by the magnetic coil 3 after power is applied meets the design requirements.

[0055] In the coil cooling flow path of the magnetic coil 3, the coil cooling branch of each coil unit 31 is connected in parallel between the second inlet and the second outlet, that is, the coil cooling medium will be diverted to the coil cooling branch of each coil unit 31 when flowing from the second inlet to the second outlet, and each coil unit 31 can dissipate heat independently through its corresponding coil cooling branch. When the total length of the coil cooling flow path of the magnetic coil 3 is constant, multiple parallel coil cooling branches can shorten the flow path of the coil cooling medium in the coil cooling flow path, so that the coil cooling medium has a shorter residence time in each coil cooling branch, which can quickly reduce the temperature of the magnetic coil 3 and improve the heat dissipation efficiency of the magnetic coil 3.

[0056] According to the deflection magnet 10 of an embodiment of the present invention, the magnet coil 3 is at least partially installed between the magnet frame 1 and the pole sheath 2. The pole sheath 2 can protect the magnet frame 1 and the magnet coil 3 to prevent particles from directly impacting the magnet frame 1 and the magnet coil 3. The sheath cooling medium can take away the heat of the pole sheath 2 when flowing through the sheath cooling flow path. The coil cooling medium can take away the heat of the magnet coil 3 when flowing through the coil cooling flow path to reduce the temperature of the pole sheath 2 and the magnet coil 3. Among them, the multiple coil units 31 of the magnet coil 3 all have coil cooling branches to form multiple parallel coil cooling branches, which can quickly reduce the temperature of the magnet coil 3 and improve the heat dissipation efficiency of the magnet coil 3, thereby facilitating the stable and reliable operation of the deflection magnet 10.

[0057] In some embodiments of the present invention, the magnet coil 3 may include a connecting bridge 33 , and each coil unit 31 may form a series circuit via the connecting bridge 33 .

[0058] In some embodiments of the present invention, reference Figure 2 、 Figure 3 、 Figure 5 and Figure 6 As shown, the coil unit 31 includes: a hollow cable 311, an inlet connector 312 and an outlet connector 313. The hollow cable 311 is wound in the magnet frame 1. The two ends of the hollow cable 311 are respectively connected to the inlet connector 312 and the outlet connector 313 to form a coil cooling branch. The inlet connector 312 and the outlet connector 313 are passed through and fixed to the magnet frame 1.

[0059] The hollow cable 311 may be a hollow conductive structure with a cross-section of an outer square and an inner circle. The coil cooling medium may flow in the circular flow channel inside the hollow cable 311. The inner side of the magnet frame 1 facing the central channel 16 may be formed with at least one protruding magnetic pole 15. The hollow cable 311 may be arranged around the magnetic pole 15 in the magnet frame 1. The inlet connector 312 and the outlet connector 313 may be L-shaped hollow tubular structures. One end of the hollow cable 311 is connected to one end of the inlet connector 312. The end of the inlet connector 312 facing away from the hollow cable 311 is the inlet for the coil cooling medium to flow into the coil cooling branch and is connected to the second inlet. The other end of the hollow cable 311 is connected to one end of the outlet connector 313. The end of the outlet connector 313 facing away from the hollow cable 311 is the outlet for the coil cooling medium to flow into the coil cooling branch and is connected to the second outlet. In other words, the hollow cable 311 is connected to a corresponding inlet connector 312 and an outlet connector 313 to form a coil cooling branch.

[0060] Reference Figure 5 As shown, there are two coil units 31, namely the first coil unit 31a and the second coil unit 31b. It can be understood that there are two flow paths of the coil cooling medium in the magnet coil 3. The coil cooling medium can flow into the hollow cable 311 of the first coil unit 31a from the inlet joint 312 of the first coil unit 31a, and flow out from the outlet joint 313 of the first coil unit 31a. Similarly, the coil cooling medium can flow into the hollow cable 311 of the second coil unit 31b from the inlet joint 312 of the second coil unit 31b, and flow out from the outlet joint 313 of the second coil unit 31b. The coil cooling medium flows in two parallel coil cooling branches to quickly reduce the temperature of the magnet coil 3. A series circuit can be formed between the two coil units 31 through the connecting bridge 33, and the tail end of the hollow cable 311 of the first coil unit 31a can be electrically connected to the head end of the hollow cable 311 of the second coil unit 31b through the connecting bridge 33. It can be understood that there is one current path in the coil unit 31, and the inlet connector 312 of the first coil unit 31a and the outlet connector 313 of the second coil unit 31b are both electrically connected to the external power supply system. The current can flow from the inlet connector 312 of the first coil unit 31a into the head end of the hollow cable 311 of the first coil unit 31a. After flowing through the hollow cable 311 of the first coil unit 31a, the current flows from the tail end of the hollow cable 311 of the first coil unit 31a through the connecting bridge 33 into the head end of the hollow cable 311 of the second coil unit 31b. Then, after flowing through the hollow cable 311 of the second coil unit 31b, the current flows out of the magnet coil 3 through the outlet connector 313 of the second coil unit 31b.

[0061] Reference Figure 2 、 Figure 3 and Figure 6As shown, the magnet coil 3 may further include a fixing frame 34, which may be made of an insulating material, such as PEEK (polyetheretherketone). The fixing frame 34 may be provided with a connector hole, and the inlet connector 312 and the outlet connector 313 may be clamped in the connector hole of the fixing frame 34. The inlet connector 312 and the outlet connector 313 are passed through the magnet frame 1 and fixed to the magnet frame 1 through the fixing frame 34. In addition, the middle channel 16 inside the magnet frame 1 may accommodate components such as the pole sheath 2 and the magnet coil 3. The internal structure of the magnet frame 1 is relatively complex. The inlet connector 312 and the outlet connector 313 may both be fixed to the outside of the magnet frame 1 to facilitate the assembly of each inlet connector 312 with the second inlet, the assembly of each outlet connector 313 with the second outlet, and the connection of the magnet coil 3 to electricity through the inlet connector 312 or the outlet connector 313 outside the magnet frame 1.

[0062] It should be noted that the cooling medium in each coil cooling branch can be a non-conductive medium such as oxygen-free water, fluorinated liquid, etc.

[0063] In some embodiments of the present invention, reference Figure 2 、 Figure 3 and Figure 6 As shown, the magnet coil 3 further includes: a coil mounting box 32 , which is sandwiched between the magnet frame 1 and the pole sheath 2 , and at least a portion of the hollow cable 311 is located in the coil mounting box 32 .

[0064] Specifically, the coil mounting box 32 can correspond to the shape of the hollow cable 311, and at least part of the hollow cable 311 is located in the coil mounting box 32 to achieve the fixation and protection of multiple hollow cables 311. The hollow cables 311 of multiple coil units 31 are integrated into a whole through the coil mounting box 32, so that the magnet coil 3 can be assembled into the magnet frame 1. The coil mounting box 32 can be clamped between the magnet frame 1 and the pole sheath 2 through the magnetic pole 15, so that the multiple hollow cables 311 are stably fixed in the magnet frame 1. At the same time, the contact area between the coil mounting box 32 and the pole sheath 2 at the fitting part is large. After the hollow cable 311 is energized, part of the heat generated can be conducted to the pole sheath 2 through the coil mounting box 32, and the magnet coil 3 is cooled through the sheath cooling flow path of the pole sheath 2.

[0065] In some embodiments of the present invention, reference Figure 2 and Figure 3As shown, the magnet frame 1 includes a top plate 11, a first side plate 12, a bottom plate 13 and a second side plate 14 connected end to end in sequence. The top plate 11, the first side plate 12, the bottom plate 13 and the second side plate 14 jointly define a middle channel 16. The first side plate 12 and the second side plate 14 are arranged opposite to and in parallel, and the top plate 11 and the bottom plate 13 are partially opposite to and not parallel. The first side plate 12 and the second side plate 14 are both installed with magnet coils 3 on the inner side of the middle channel 16.

[0066] Among them, the top plate 11, the first side plate 12, the bottom plate 13 and the second side plate 14 of the magnet frame 1 can be connected end to end in sequence by bolts. It can be understood that the size of the magnet frame 1 is relatively large. During processing and manufacturing, the top plate 11, the first side plate 12, the bottom plate 13 and the second side plate 14 can be processed separately. The processing technology is relatively simple, so as to reduce the difficulty of processing the magnet frame 1, thereby reducing the production cost of the magnet frame 1. At the same time, the magnet frame 1 can be proportionally enlarged according to design requirements, and the size enlargement of the top plate 11, the first side plate 12, the bottom plate 13 and the second side plate 14 is relatively simple and convenient.

[0067] The first side plate 12 and the second side plate 14 are arranged opposite and parallel to each other, while the top plate 11 and the bottom plate 13 are partially opposite and non-parallel. The magnet frame 1 is a special-shaped structure with the top plate 11 and the bottom plate 13 at a certain angle. The magnet frame 1 can be tilted in the magnetic deflection device 100, allowing neutral particles to pass through the particle channel 27 in a direction generally parallel to the bottom plate 13. The ion eater 50 in the magnetic deflection device 100 can be tilted to one side of the magnet frame 1 according to the path of the charged particles, avoiding the path of the neutral particles. This can increase the length of the beam passing through the particle channel 27, allowing the charged particles to be fully affected by the magnetic field in the particle channel 27 and separated from the neutral particles. It can also improve the space utilization within the magnetic deflection device 100.

[0068] Magnetic coils 3 are installed on the inner sides of the first side plate 12 and the second side plate 14 facing the middle channel 16. The first side plate 12 and the second side plate 14 have magnetic poles 15. The number of magnetic coils 3 can be two. The two magnetic coils 3 are respectively connected to the corresponding magnetic poles 15 through the corresponding coil mounting boxes 32 to enhance the Lorentz force exerted on the charged particles in the particle channel 27, so that the magnetic field strength generated after the magnetic coils 3 are energized is enhanced and meets the design requirements.

[0069] In some embodiments of the present invention, reference Figure 4 、 Figure 7-Figure 9As shown, the magnetic pole sheath 2 includes: an inner sheath assembly 21, an outer sheath assembly 22, a cooling medium supply pipe 23 and a cooling medium return pipe 24. At least a portion of the inner sheath assembly 21 is arranged inside the middle channel 16, and the inner sheath assembly 21 corresponds to the top plate 11, the first side plate 12, the bottom plate 13 and the second side plate 14 facing the inner side of the middle channel 16 respectively. At least a portion of the outer sheath assembly 22 is arranged outside the middle channel 16. On the movement path of the particles, at least a portion of the outer sheath assembly 22 It is arranged on the front side of the magnet frame 1, and the outer jacket assembly 22 corresponds to the top plate 11, the first side plate 12, the bottom plate 13, the second side plate 14 and the front side of the magnet coil 3 respectively, the cooling medium supply pipe 23 has a first inlet 231, and the cooling medium return pipe 24 has a first outlet 241, wherein the inner jacket assembly 21 and the outer jacket assembly 22 each include a plurality of hollow pipes 41 connected side by side, and each hollow pipe 41 is connected in parallel between the cooling medium supply pipe 23 and the cooling medium return pipe 24.

[0070] Specifically, at least part of the inner sheath assembly 21 is arranged inside the middle channel 16, and the inner sheath assembly 21 corresponds to the top plate 11, the first side plate 12, the bottom plate 13 and the second side plate 14 facing the inner side of the middle channel 16, so as to prevent the particles from colliding with the magnet coil 3 and the inner side of the magnet frame 1. At least part of the outer sheath assembly 22 is arranged outside the middle channel 16, on the movement path of the particles, that is, Figure 7 In the front-to-back direction, the particles move from front to back and enter the deflection magnet 10. At least a portion of the outer sheath assembly 22 is arranged on the front side of the magnet frame 1, and the outer sheath assembly 22 corresponds to the top plate 11, the first side plate 12, the bottom plate 13, the second side plate 14 and the front side of the magnet coil 3 respectively. When the angle of the particles emitted by the neutralizer to the deflection magnet 10 is relatively deviated, the particles deviating from the deflection magnet 10 will collide with the outer sheath assembly 22 before entering the particle channel 27. The outer sheath assembly 22 can prevent the particles from colliding with the front side of the magnet coil 3 and the front side of the magnet frame 1, thereby achieving a protective effect on the magnet coil 3 and the magnet frame 1.

[0071] The cooling medium supply pipe 23 has a first inlet 231, and the cooling medium return pipe 24 has a first outlet 241. The inner jacket assembly 21 and the outer jacket assembly 22 each include a plurality of hollow pipes 41 connected in parallel. The hollow pipes 41 can be made of chromium-zirconium copper. Each hollow pipe 41 is connected in parallel between the cooling medium supply pipe 23 and the cooling medium return pipe 24. The flow path of the jacket cooling medium is: the first inlet 231, the cooling medium supply pipe 23, the plurality of parallel hollow pipes 41, the cooling medium return pipe 24 and the first outlet 241, that is, Specifically, when the jacket cooling medium enters the cooling medium supply pipe 23 through the first inlet 231, it will be diverted to each hollow pipe 41. Each hollow pipe 41 can dissipate heat independently. When the total length of the hollow pipes 41 of the pole jacket 2 is constant, the flow path of the jacket cooling medium in the jacket cooling flow path can be shortened. Multiple parallel hollow pipes 41 can shorten the flow path of the jacket cooling medium in the jacket cooling flow path, reduce the residence time of the jacket cooling medium in each hollow pipe 41, improve the heat dissipation efficiency of the pole jacket 2, and reduce the temperature of the pole jacket 2.

[0072] In the above embodiment, at least part of the inner jacket assembly 21 is arranged inside the middle channel 16, and at least part of the outer jacket assembly 22 is arranged outside the middle channel 16 to prevent particles from colliding with the magnet frame 1 and the magnet coil 3. The inner jacket assembly 21 and the outer jacket assembly 22 both include a plurality of hollow pipes 41 connected side by side. The length of each hollow pipe 41 is relatively short, and the flow speed of the jacket cooling medium in the hollow pipe 41 is relatively fast and the path is short, so as to improve the heat dissipation efficiency of the pole jacket 2.

[0073] In some embodiments of the present invention, reference Figure 9 As shown, the outer surface of the hollow pipe 41 has a stepped surface 411. In any two hollow pipes 41 connected side by side, there is a gap between the stepped surfaces 411 in the side-by-side direction, and the stepped surfaces 411 of the two are overlapped and connected perpendicular to the side-by-side direction.

[0074] Among them, the two connected step surfaces 411 have a gap in the side-by-side direction, and particles may enter the gap between the step surfaces 411. That is to say, the gap increases the area of ​​the hollow pipe 41 in the particle channel 27 that can withstand particle impact, so as to disperse the heating area of ​​the hollow pipe 41, avoid local overheating of the hollow pipe 41 and difficulty in cooling, thereby helping to improve the heat dissipation effect of the magnetic pole sheath 2. At the same time, there is a gap between the two connected hollow pipes 41, which can accommodate the deformation of the hollow pipe 41 when it expands due to heat, thereby releasing the thermal stress generated by the thermal expansion and contraction of the hollow pipe 41, and reducing the risk of damage to the magnetic pole sheath 2.

[0075] The two connected step surfaces 411 are overlapped and connected perpendicularly to the side-by-side direction. The overlapping step surfaces 411 can prevent particles from continuing to move toward the magnet coil 3 and the magnet frame 1, avoiding particles from passing through the gap and colliding with the magnet coil 3 and the magnet frame 1, thereby achieving a protective effect on the magnet frame 1 and the magnet coil 3.

[0076] In the above embodiment, in any two hollow pipes 41 connected side by side, the stepped surfaces 411 of the two have a gap in the side-by-side direction, which can improve the heat dissipation effect of the pole sheath 2 and reduce the risk of damage to the pole sheath 2. The stepped surfaces 411 of the two are overlapped and connected perpendicular to the side-by-side direction, which can achieve a protective effect on the magnet frame 1 and the magnet coil 3.

[0077] In some embodiments of the present invention, reference Figure 7 、 Figure 8 、 Figure 10-12 As shown, the pole sleeve 2 also includes: a bottom sleeve assembly 25, the bottom sleeve assembly 25 is arranged on the inner side of the inner sleeve assembly 21 away from the magnet frame 1, and the bottom sleeve assembly 25 is located on the side of the inner sleeve assembly 21 close to the bottom plate 13 and corresponds to the bottom plate 13, the bottom sleeve assembly 25 includes: an enhanced heat exchange plate 251 and a heat exchange cover plate 252, the enhanced heat exchange plate 251 is provided with a cooling groove 2511, the cooling groove 2511 includes a first cooling groove 25111, a second cooling groove 25112 and a connecting groove 25113, the first cooling groove 25111 and the second cooling groove 25112 are arranged side by side, the same end of the first cooling groove 25111 and the second cooling groove 25112 are connected through the connecting groove 25113, the first cooling groove 25111 and the second cooling groove 25112 are connected A partition ridge 42 is formed between the grooves 25112, and the partition ridge 42 is provided with a deformation release groove 421. The heat exchange cover plate 252 covers the slot of the cooling groove 2511. The heat exchange cover plate 252 has a first cover plate inlet 2521, a second cover plate inlet 2522, a first cover plate outlet 2523 and a second cover plate outlet 2524. The connecting groove 25113 is connected to the cooling medium supply pipe 23 through the first cover plate inlet 2521 and the second cover plate inlet 2522. The end of the first cooling groove 25111 away from the connecting groove 25113 is connected to the cooling medium return pipe 24 through the first cover plate outlet 2523. The end of the second cooling groove 25112 away from the connecting groove 25113 is connected to the cooling medium return pipe 24 through the second cover plate outlet 2524.

[0078] The bottom sheath assembly 25 is arranged on the inner side of the inner sheath assembly 21 away from the magnet frame 1, and the bottom sheath assembly 25 is located on the side of the inner sheath assembly 21 close to the bottom plate 13 and corresponds to the bottom plate 13. Figure 7 and Figure 12As shown, the bottom jacket assembly 25 is installed above the bottom plate 13, and part of the inner jacket assembly 21 is sandwiched between the bottom jacket assembly 25 and the bottom plate 13. The particles emitted by the neutralizer to the deflection magnet 10 tend to converge to the side close to the bottom plate 13, resulting in a greater heat dissipation pressure of the inner jacket assembly 21 close to the side of the bottom plate 13. The bottom jacket assembly 25 is provided above the inner jacket assembly 21 corresponding to the bottom plate 13. The particles can first collide with the bottom jacket assembly 25 in the particle channel 27, and the heat generated by the collision is dissipated through the bottom jacket assembly 25, thereby avoiding excessive heat accumulation of the inner jacket assembly 21 on the side close to the bottom plate 13, thereby improving the heat dissipation efficiency of the pole jacket 2. Part of the inner jacket assembly 21 and the bottom jacket assembly 25 are provided above the bottom plate 13, which can provide double-layer protection for the bottom plate 13 and avoid damage to the bottom plate 13.

[0079] The bottom jacket assembly 25 includes: an enhanced heat exchange plate 251 and a heat exchange cover plate 252. A flow channel for the jacket cooling medium is provided between the enhanced heat exchange plate 251 and the heat exchange cover plate 252. The jacket cooling medium flowing through the flow channel can take away the heat of the bottom jacket assembly 25.

[0080] Specifically, the enhanced heat exchange plate 251 is provided with a cooling groove 2511, which can be configured as a U-shaped groove. A separating ridge 42 is formed between the first cooling groove 25111 and the second cooling groove 25112. The separating ridge 42 is provided with a deformation relief groove 421, which can be a blind groove structure. The deformation relief groove 421 can relieve the stress on the enhanced heat exchange plate 251, thereby adapting to the deformation of the enhanced heat exchange plate 251 under alternating hot and cold conditions and reducing the risk of damage to the enhanced heat exchange plate 251. The heat exchange cover plate 252 can be a U-shaped flat plate corresponding to the shape of the notch of the cooling groove 2511. The heat exchange cover plate 252 covers the notch of the cooling groove 2511, allowing the jacket cooling medium to flow in the cooling groove 2511. At the same time, the U-shaped flat plate can also relieve the stress under alternating hot and cold conditions.

[0081] The connecting groove 25113 is connected to the cooling medium supply pipe 23 through the first cover plate inlet 2521 and the second cover plate inlet 2522. The end of the first cooling groove 25111 away from the connecting groove 25113 is connected to the cooling medium return pipe 24 through the first cover plate outlet 2523. The end of the second cooling groove 25112 away from the connecting groove 25113 is connected to the cooling medium return pipe 24 through the second cover plate outlet 2524. In other words, the first cover plate inlet 2521 and the first cover plate outlet 2523 are respectively provided at the first cover plate inlet 2521 and the second cover plate outlet 2523. The second cover plate inlet 2522 and the second cover plate outlet 2524 are respectively arranged on the front and rear sides of the second cooling groove 25111. When the jacket cooling medium flows from the cooling medium supply pipe 23 to the cooling medium return pipe 24, the jacket cooling medium is diverted to the first cooling groove 25111 and the second cooling groove 25112 at the connecting groove 25113, so that the jacket cooling medium in the cooling groove 2511 takes away the heat of the bottom jacket assembly 25, thereby achieving the heat dissipation effect of the bottom jacket assembly 25.

[0082] In some embodiments of the present invention, reference Figure 10-12 As shown, the slot opening of the cooling slot 2511 is opposite to the bottom plate 13 , and a plurality of auxiliary heat exchange slots 25114 are provided at the bottom of the cooling slot 2511 .

[0083] Specifically, the notch of the cooling groove 2511 is opposite to the bottom plate 13. In the up and down directions, the particles may collide with the outer portion corresponding to the bottom of the cooling groove 2511 of the enhanced heat exchange plate 251, resulting in more heat at the bottom of the cooling groove 2511. A plurality of auxiliary heat exchange grooves 25114 are provided at the bottom of the cooling groove 2511. The plurality of auxiliary heat exchange grooves 25114 form a serrated structure at the bottom of the cooling groove 2511. The plurality of auxiliary heat exchange grooves 25114 can increase the contact area between the jacket cooling medium and the bottom of the cooling groove 2511. The jacket cooling medium flowing through the cooling groove 2511 can fully take away the heat from the bottom of the cooling groove 2511, thereby improving the heat dissipation effect of the bottom jacket assembly 25.

[0084] In some embodiments of the present invention, reference Figure 2 、 Figure 8 and Figure 9 As shown, the inner sheath assembly 21 includes: a first pipe assembly 211 and a second pipe assembly 212, the first pipe assembly 211 includes a plurality of hollow pipes 41, and the first pipe assembly 211 corresponds to the inner side of the first side plate 12, a part of the inner side of the top plate 11 and a part of the inner side of the bottom plate 13 respectively, the second pipe assembly 212 includes a plurality of hollow pipes 41, and the second pipe assembly 212 corresponds to the inner side of the second side plate 14, another part of the inner side of the top plate 11 and another part of the inner side of the bottom plate 13 respectively.

[0085] Specifically, the first pipeline assembly 211 and the second pipeline assembly 212 can be constructed as a C-shaped structure with openings facing each other. The first pipeline assembly 211 and the second pipeline assembly 212 are connected in parallel in the middle channel 16. Half of the middle channel 16 corresponds to the first pipeline assembly 211, and the other half of the middle channel 16 corresponds to the second pipeline assembly 212. When the total area inside the middle channel 16 is constant, compared with the inner jacket assembly 21 surrounding the entire circle in the middle channel 16, the parallel first pipeline assembly 211 and the second pipeline assembly 212 can shorten the flow path of the jacket cooling medium in the hollow pipe 41, so that the jacket cooling medium has a shorter residence time in each hollow pipe 41, which can quickly reduce the temperature of the inner jacket assembly 21 and improve the heat dissipation efficiency of the inner jacket assembly 21.

[0086] In some embodiments of the present invention, reference Figure 2 and Figure 3 As shown, the top plate 11 of the magnet frame 1 also has a top plate through-hole 111, and the inlet connector 312 and the outlet connector 313 can be passed through the top plate through-hole 111 and fixed to the magnet frame 1, so as to facilitate the assembly of each inlet connector 312 with the second inlet, the assembly of each outlet connector 313 with the second outlet, and the connection of the magnet coil 3 to electricity through the inlet connector 312 or the outlet connector 313 outside the magnet frame 1.

[0087] In some embodiments of the present invention, reference Figure 2 、 Figure 7-Figure 9 As shown, the pole shield 2 further includes a top shield assembly 26, which includes a plurality of hollow pipes 41 connected side by side, each hollow pipe 41 being connected in parallel between the cooling medium supply pipe 23 and the cooling medium return pipe 24, and the top shield assembly 26 being arranged on the inner side of the inner shield assembly 21 away from the magnet frame 1, and a portion of the top shield assembly 26 is located on a side of the inner shield assembly 21 close to the top plate 11 and corresponding to the top plate 11, and the other portion corresponds to the front side of the top plate 11, and the top plate 11. A top sheath assembly 26 is provided below the corresponding inner sheath assembly 21. Particles may first collide with the top sheath assembly 26 in the particle channel 27, and the heat generated by the collision is dissipated through the top sheath assembly 26, thereby preventing excessive heat from gathering on the side of the inner sheath assembly 21 close to the top plate 11, thereby improving the heat dissipation efficiency of the magnetic pole sheath 2. Part of the inner sheath assembly 21 and the top sheath assembly 26 are provided below the top plate 11, which can provide double-layer protection for the top plate 11 and prevent damage to the top plate 11.

[0088] Reference Figure 1 and Figure 13As shown, a magnetic deflection device 100 according to another embodiment of the present invention includes: a vacuum box 20 and a plurality of deflection magnets 10 of the above embodiment. The vacuum box 20 has an installation space 203, a particle outlet 201 and a plurality of particle inlets 202. The particle outlet 201 and the plurality of particle inlets 202 are both connected to the installation space 203. Each deflection magnet 10 is disposed in the installation space 203. The plurality of deflection magnets 10 correspond one-to-one to the plurality of particle inlets 202. The particle channel 27 of each deflection magnet 10 is located between the particle outlet 201 and the corresponding particle inlet 202.

[0089] Among them, the vacuum box 20 has an installation space 203, a particle outlet 201 and multiple particle inlets 202. The vacuum box 20 can provide a vacuum environment and support for the deflection magnet 10. The installation space 203 can accommodate multiple deflection magnets 10. The particle outlet 201 and the multiple particle inlets 202 are both connected to the installation space 203. In the front-to-back direction, the multiple particle inlets 202 are located in front of the particle outlet 201. The multiple deflection magnets 10 correspond one-to-one to the multiple particle inlets 202, and the particle channel 27 of each deflection magnet 10 is located between the particle outlet 201 and the corresponding particle inlet 202. Particles enter the deflection magnet 10 from the particle inlet 202. Neutral particles passing through the particle channel 27 can converge at the particle outlet 201 and flow out of the vacuum box 20 through the particle outlet 201.

[0090] According to the magnetic deflection device 100 of the embodiment of the present invention, its magnet coil 3 is at least partially installed between the magnet frame 1 and the pole sheath 2 to prevent particles from directly impacting the magnet frame 1 and the magnet coil 3. When the sheath cooling medium flows through the sheath cooling flow path, it can remove heat from the pole sheath 2. When the coil cooling medium flows through the coil cooling flow path, it can remove heat from the magnet coil 3, thereby reducing the temperature of the pole sheath 2 and the magnet coil 3. The multiple coil units 31 of the magnet coil 3 each have a coil cooling branch, forming multiple parallel coil cooling branches. This can quickly reduce the temperature of the magnet coil 3 and improve the heat dissipation efficiency of the magnet coil 3, thereby facilitating stable and reliable operation of the magnetic deflection device 100.

[0091] In some embodiments of the present invention, reference Figure 2 and Figure 13 As shown, the magnetic deflection device 100 includes a water-cooling busbar 30, which includes a water supply main pipe 301 and a return water main pipe 302. The water-cooling busbar 30 can be connected to an external water supply system. The water supply main pipe 301 can be connected to the first inlet 231 of each deflection magnet 10 and provide the jacket cooling medium to the first inlet 231. The return water main pipe 302 can be connected to the first outlet 241 of each deflection magnet 10, and the jacket cooling medium can flow into the return water main pipe 302 through the first outlet 241.

[0092] In some embodiments of the present invention, reference Figure 2 and Figure 13-16 As shown, the magnetic deflection device 100 includes a bracket 40, which includes a bottom bracket 402 and a top bracket 401. The bottom bracket 402 has a bottom single pin seat 4021 and a double pin seat 4022, and the top bracket 401 has a top single pin seat 4011 and a single pin hole 4012. Multiple deflection magnets 10 can be layered and installed in the installation space 203 through the bottom bracket 402 and the top bracket 401, so that the bracket 40 can support and fix the multiple deflection magnets 10.

[0093] Specifically, refer to Figure 2 As shown, the first side plate 12 and the second side plate 14 may be formed with a support ear 121 on the side away from the central channel 16, and the bottom plate 13 may be formed with a base 131 on the side away from the central channel 16, and the base 131 has a double pin hole 1311, Figure 13 As shown, the six deflection magnets 10 are evenly divided into two rows, one above the other. The bottom plates 13 of the deflection magnets 10 in the upper row are opposite to the bottom plates 13 of the deflection magnets 10 in the corresponding lower row, and the deflection magnets 10 in the upper and lower rows are symmetrical. The single latch seat 4021 at the bottom can be connected to the lug 121 and the single latch hole 4012 of the deflection magnets in the lower row. The double latch seat 4022 can be connected to the double latch holes 1311 of the deflection magnets 10 in the upper row and the lower row. The single latch seat 4011 at the top can be connected to the lug 121 of the deflection magnets 10 in the upper row. After assembly, the deflection magnet 10, the bottom bracket 402 and the top bracket 401 can be fixed in the installation space 203 by the bottom bracket 402 and the top bracket 401, so as to facilitate the installation and removal of the deflection magnet 10. At the same time, the bottom bracket 402 and the top bracket 401 can adjust the inclination angle of the magnet frame 1 according to the angle of the particles emitted by the neutralizer to the deflection magnet 10, and adjust the combination mode of the magnet frame 1 according to the particle inlet 202 to meet the needs of different particle sources.

[0094] Reference Figure 1 As shown, a neutral beam injection system 1000 according to another embodiment of the present invention includes the magnetic deflection device 100 described above.

[0095] The neutral beam injection system 1000 includes: a particle source, a neutralizer and a magnetic deflection device 100. The magnetic deflection device 100 is equipped with a deflection magnet 10 and an ion eater 50. The particle source emits a beam toward the neutralizer. After the beam is neutralized by the neutralizer, high-energy neutral particles and unneutralized charged particles are obtained. When the neutral particles and charged particles pass through the magnetic deflection device 100, most of the neutral particles can pass through the magnetic deflection device 100 normally. The charged particles are subjected to the Lorentz force in the magnetic field of the deflection magnet 10, so that the trajectory of the charged particles is deflected and they are eaten by the ion eater 50, thereby filtering the charged particles, obtaining pure neutral particles, and ensuring the injection of the neutral beam. The neutral beam injection system 1000 provides neutral particles for controlled nuclear fusion research in large scientific facilities such as fusion reactors. The neutral particles can enter the interior of the tokamak host and be heated.

[0096] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0097] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A deflection magnet, characterized in that: include: A magnet frame (1), wherein the magnet frame (1) defines a central channel (16); A magnetic pole sheath (2), the magnetic pole sheath (2) being at least partially disposed in the middle channel (16), the magnetic pole sheath (2) defining a particle channel (27) in the middle channel (16), the magnetic pole sheath (2) having a sheath cooling flow path, a first inlet (231) and a first outlet (241), the first inlet (231) being in communication with the first outlet (241) via the sheath cooling flow path; at least one magnet coil (3), the magnet coil (3) being at least partially mounted between the magnet frame (1) and the pole shield (2), the magnet coil (3) deflecting charged particles passing through the particle channel (27) when energized, the magnet coil (3) having a coil cooling flow path, a second inlet, and a second outlet, the second inlet being connected to the second outlet via the coil cooling flow path; The magnetic coil (3) comprises: a plurality of coil units (31), the plurality of coil units (31) forming a series circuit, each of the coil units (31) having a coil cooling branch, and the plurality of coil cooling branches being connected in parallel between the second inlet and the second outlet to form the coil cooling flow path; The magnet frame (1) comprises a top plate (11), a first side plate (12), a bottom plate (13) and a second side plate (14) connected end to end in sequence, wherein the top plate (11), the first side plate (12), the bottom plate (13) and the second side plate (14) jointly define the middle channel (16), the first side plate (12) and the second side plate (14) are arranged opposite to and in parallel, and the top plate (11) and the bottom plate (13) are partially opposite to and not parallel to each other; The magnetic coil (3) is mounted on the inner sides of the first side plate (12) and the second side plate (14) facing the middle channel (16).

2. The deflection magnet according to claim 1, wherein The coil unit (31) comprises: a hollow cable (311), an inlet connector (312) and an outlet connector (313); the hollow cable (311) is wound inside the magnet frame (1); two ends of the hollow cable (311) are respectively connected to the inlet connector (312) and the outlet connector (313) to form the coil cooling branch; the inlet connector (312) and the outlet connector (313) are passed through and fixed to the magnet frame (1).

3. The deflection magnet according to claim 2, wherein The magnet coil (3) further comprises: a coil mounting box (32), wherein the coil mounting box (32) is sandwiched between the magnet frame (1) and the pole sheath (2), and at least a portion of the hollow cable (311) is located within the coil mounting box (32).

4. The deflection magnet according to claim 1, wherein The magnetic pole sheath (2) comprises: an inner sheath assembly (21), at least a portion of the inner sheath assembly (21) being disposed inside the middle channel (16), and the inner sheath assembly (21) corresponding to the inner sides of the top plate (11), the first side plate (12), the bottom plate (13), and the second side plate (14) facing the middle channel (16); an outer sheath assembly (22), at least a portion of the outer sheath assembly (22) being disposed outside the middle channel (16); and on the movement path of the particles, at least a portion of the outer sheath assembly (22) being disposed on the front side of the magnet frame (1), and the outer sheath assembly (22) corresponding to the top plate (11), the first side plate (12), the bottom plate (13), the second side plate (14), and the front side of the magnet coil (3), respectively; a cooling medium supply pipe (23), the cooling medium supply pipe (23) having the first inlet (231); a cooling medium return pipe (24), the cooling medium return pipe (24) having the first outlet (241); The inner jacket assembly (21) and the outer jacket assembly (22) each include a plurality of hollow pipes (41) connected in parallel, and each of the hollow pipes (41) is connected in parallel between the cooling medium supply pipe (23) and the cooling medium return pipe (24).

5. The deflection magnet according to claim 4, wherein The outer surface of the hollow pipe (41) has a stepped surface (411), and in any two hollow pipes (41) connected side by side, the stepped surfaces (411) of the two have a gap in the side-by-side direction, and the stepped surfaces (411) of the two are overlapped and connected perpendicular to the side-by-side direction.

6. The deflection magnet according to claim 4, wherein The magnetic pole shield (2) further comprises: a bottom shield assembly (25), the bottom shield assembly (25) being arranged on the inner side of the inner shield assembly (21) away from the magnet frame (1), and the bottom shield assembly (25) being located on a side of the inner shield assembly (21) close to the bottom plate (13) and corresponding to the bottom plate (13), the bottom shield assembly (25) comprising: An enhanced heat exchange plate (251), wherein the enhanced heat exchange plate (251) is provided with a cooling groove (2511), wherein the cooling groove (2511) comprises a first cooling groove (25111), a second cooling groove (25112) and a connecting groove (25113), wherein the first cooling groove (25111) and the second cooling groove (25112) are arranged side by side, and the same end of the first cooling groove (25111) and the second cooling groove (25112) are connected through the connecting groove (25113), and a separation ridge (42) is formed between the first cooling groove (25111) and the second cooling groove (25112), and the separation ridge (42) is provided with a deformation release groove (421); A heat exchange cover plate (252), the heat exchange cover plate (252) covers the notch of the cooling groove (2511), the heat exchange cover plate (252) has a first cover plate inlet (2521), a second cover plate inlet (2522), a first cover plate outlet (2523) and a second cover plate outlet (2524), the connecting groove (25113) is connected to the cooling medium supply pipe (23) through the first cover plate inlet (2521) and the second cover plate inlet (2522), the end of the first cooling groove (25111) away from the connecting groove (25113) is connected to the cooling medium return pipe (24) through the first cover plate outlet (2523), and the end of the second cooling groove (25112) away from the connecting groove (25113) is connected to the cooling medium return pipe (24) through the second cover plate outlet (2524).

7. The deflection magnet according to claim 6, wherein The notch of the cooling groove (2511) is opposite to the bottom plate (13), and a plurality of auxiliary heat exchange grooves (25114) are provided at the bottom of the cooling groove (2511).

8. The deflection magnet according to any one of claims 4 to 7, characterized in that: The inner sheath assembly (21) comprises: a first pipe assembly (211), the first pipe assembly (211) comprising a plurality of the hollow pipes (41), and the first pipe assembly (211) respectively corresponding to the inner side of the first side plate (12), a portion of the inner side of the top plate (11), and a portion of the inner side of the bottom plate (13); A second pipe assembly (212), the second pipe assembly (212) includes a plurality of the hollow pipes (41), and the second pipe assembly (212) corresponds to the inner side of the second side plate (14), another portion of the inner side of the top plate (11), and another portion of the inner side of the bottom plate (13), respectively.

9. A magnetic deflection device, characterized in that: include: A vacuum box (20), the vacuum box (20) having an installation space (203), a particle outlet (201), and a plurality of particle inlets (202), the particle outlet (201) and the plurality of particle inlets (202) both being in communication with the installation space (203); A plurality of deflection magnets (10), wherein the deflection magnets (10) are the deflection magnets (10) according to any one of claims 1 to 8, each of the deflection magnets (10) is arranged in the installation space (203), the plurality of deflection magnets (10) correspond one-to-one to the plurality of particle inlets (202), and the particle channel (27) of each deflection magnet (10) is located between the particle outlet (201) and the corresponding particle inlet (202).

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