CN113871132A - Non-liquid helium superconducting magnet for animal imaging - Google Patents
Non-liquid helium superconducting magnet for animal imaging Download PDFInfo
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- CN113871132A CN113871132A CN202111128027.5A CN202111128027A CN113871132A CN 113871132 A CN113871132 A CN 113871132A CN 202111128027 A CN202111128027 A CN 202111128027A CN 113871132 A CN113871132 A CN 113871132A
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- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
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Abstract
The invention provides a liquid-helium-free animal imaging superconducting magnet which comprises a superconducting magnet, a liquid-helium-free low-temperature system and a pull rod. The superconducting magnet comprises a main magnet, a shielding magnet and a 4K container, wherein the main magnet is wound in an external wire slot of the main framework to form the main magnet, the shielding coil is wound in the external wire slot of the shielding framework to form the shielding magnet, and the 4K container contains the superconducting magnet; the liquid helium-free low-temperature system comprises a refrigerator, a refrigerator primary cold head, a cold screen, a refrigerator secondary cold head, a cold conduction ring, a cold conduction belt and a Dewar container, wherein the refrigerator primary cold head is directly connected with the cold screen to realize primary refrigeration, the refrigerator secondary cold head is directly connected with the cold conduction ring, the cold conduction ring is connected with a shielding coil and a main coil through the cold conduction belt to realize secondary refrigeration of a superconducting magnet, and the Dewar container is used for forming a low-temperature system vacuum environment; the superconducting magnet and the cold screen are suspended and fixed in the Dewar container through a pull rod to reduce the contact heat leakage of the system; the diameter of the inner hole of the superconducting magnet is suitable for small animal imaging.
Description
Technical Field
The invention belongs to the technical field of superconducting magnets, and relates to a liquid helium-free animal imaging superconducting magnet.
Background
Superconducting magnets are widely applied to development of medical diagnosis and scientific instruments, wherein superconducting MRI equipment becomes one of the most popular clinical diagnosis equipment in the world, but the stable operation of the superconducting MRI equipment needs to be kept in a low-temperature environment, the traditional refrigeration mode is liquid helium refrigeration, a large amount of liquid helium materials are consumed for long-term use, and the cost is high.
With the continuous development of novel materials and low-temperature technology in recent years, the refrigerating power of the refrigerating machine is low, the low energy consumption at the temperature of 4.2K can be realized, and the daily operation and maintenance cost is low. Adopt the refrigerator to cool off the superconducting magnet, can avoid using liquid helium, in general superconducting magnet, the second grade cold head of refrigerator directly cools off magnet both ends through leading the cold drawing, but to the magnet that the volume is slightly bigger, causes the uneven problem of magnet temperature easily to influence the degree of consistency in magnetic field, need optimize the cryogenic temperature distribution of second grade.
CN113035486A discloses a refrigeration system of a cryogenic superconducting magnet. The refrigeration system comprises a cold screen, a lead cooling channel, a cold screen cooling channel, a first liquid helium input port, a first helium output port, a helium tank, a liquid helium input pipe and a helium output pipe, wherein the cold screen is arranged outside a low-temperature superconducting coil, the helium tank is arranged between the cold screen and the low-temperature superconducting coil and is not in contact with the cold screen and the low-temperature superconducting coil, the liquid helium input pipe and the helium output pipe are both connected with the helium tank, liquid helium is injected into the helium tank from the first liquid helium input port through the liquid helium input pipe, helium volatilized from the helium tank is output from the first helium output port through the helium output pipe, the lead cooling channel is connected between the helium output pipe and a superconducting current lead and used for conducting cold to cool the superconducting current lead, and the cold screen cooling channel is connected between the helium output pipe and the cold screen and used for conducting cold to cool the cold screen. Therefore, volatilization of the liquid helium can be effectively reduced, and the risk of quenching of the low-temperature superconducting magnet is reduced.
CN202384127U discloses a low-temperature container system for superconducting magnet with zero liquid helium consumption, which has good heat insulation effect and can effectively improve cold head cold conduction effect. The low temperature container system is including setting up the inner container base at inner container top, install the heat exchanger on the inner container base, cup joint the magnetic screen on the inner container base, the cladding is at the middle cold screen of protecting against radiation in the inner container outside, set up copper flange and the cold head at middle cold screen top of protecting against radiation, the heat exchanger is arranged in the magnetic screen, the copper flange is located the top of magnetic screen, the one end of cold head is passed the copper flange and is connected with the heat exchanger in the magnetic screen, still including the lower bellows that is located the magnetic screen, lower bellows cup joints on the cold head, its one end and copper flange butt joint, the other end is pegged graft in the inner container base.
CN102436898A discloses a system for implementing a cooling method for a low-temperature superconducting magnet, which includes a liquid nitrogen filling valve, a liquid helium filling valve, a liquid nitrogen level gauge, a liquid nitrogen valve, a central hole, a helium exhaust valve, a vacuum chamber, a liquid nitrogen pipe, a liquid helium filling pipe, a helium exhaust pipe, a liquid nitrogen storage chamber and a liquid helium storage chamber; a liquid helium storage cavity is arranged at the center part in one closed space, a liquid nitrogen storage cavity is arranged outside the liquid helium storage cavity, and a vacuum cavity is arranged at the outermost periphery of the liquid helium storage cavity; an end cover is arranged at the upper end of the closed space, a center hole is formed in the center of the end cover, a liquid nitrogen pipe and a high-temperature superconducting wire connected with the lower end of the liquid nitrogen level gauge are inserted into the liquid helium storage cavity through the center hole, and a liquid nitrogen valve is arranged on the liquid nitrogen pipe; the end cover part of the liquid helium storage cavity is provided with a liquid helium filling valve, a liquid helium filling pipe inserted into the liquid helium storage cavity, a helium exhaust valve and a helium exhaust pipe inserted into the liquid helium storage cavity; a liquid nitrogen charging valve is arranged at the end cover part of the liquid nitrogen storage cavity, and a vacuum valve is arranged at the end cover part of the vacuum cavity; the middle part of the liquid helium storage cavity is an annular groove extending towards the liquid nitrogen storage cavity.
Therefore, how to provide a magnet which does not need to consume liquid nitrogen, can provide a low-temperature environment required by a superconducting magnet by adopting a refrigerator, ensures uniform temperature distribution of a magnetic field and small heat leakage, is suitable for animal imaging, and becomes a problem to be solved urgently at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a liquid-helium-free animal imaging superconducting magnet, which adopts a refrigerating machine refrigeration and internal cold conduction structure to provide a low-temperature environment required by the superconducting magnet, and ensures the uniformity of a temperature field in the superconducting magnet by arranging a cold conduction ring and a cold conduction band, thereby ensuring the good uniformity of the magnetic field.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a liquid-helium-free animal imaging superconducting magnet, which comprises a superconducting magnet, a liquid-helium-free cryogenic system and a pull rod, wherein the superconducting magnet, the liquid-helium-free cryogenic system and the pull rod are all in a vacuum environment.
The liquid helium-free cryogenic system comprises a refrigerator, a refrigerator primary cold head, a cold shield, a refrigerator secondary cold head, a cold conduction structure and a Dewar container, wherein the cold shield is sleeved in the Dewar container, the superconducting magnet is arranged in the cold shield, the cold conduction structure comprises a cold conduction ring and a cold conduction belt, and the cold conduction ring is arranged around the superconducting magnet and is fixedly connected with the superconducting magnet through a support rod; the primary cold head of the refrigerator is directly connected with the cold screen to realize primary refrigeration, the secondary cold head of the refrigerator is directly connected with the cold guide ring, and the cold guide ring is connected with the coil of the superconducting magnet through the cold guide belt to realize secondary refrigeration.
The superconducting magnet and the cold shield are suspended inside the Dewar container through the pull rod.
The primary refrigeration is realized by directly connecting the primary cold head of the refrigerator with the cold screen, and further, the secondary refrigeration is realized by arranging the cold conduction ring and connecting a plurality of cold conduction belts arranged along the circumferential direction of the cold conduction ring with the coil of the superconducting magnet for heat transfer, so that the synchronous conduction cooling of the circumferential direction of the superconducting magnet is realized, the cooling rate is increased, the temperature field uniformity inside the superconducting magnet is improved, and the good magnetic field uniformity is further ensured. In addition, the superconducting magnet and the cold screen are suspended in the Dewar container through the pull rod, so that the direct contact with the Dewar container is avoided, and the heat leakage of the magnet is reduced. The invention is cooled by the refrigerator without consuming liquid helium, and has the characteristics of simple structure, low cost, uniform temperature field and uniform magnetic field.
It should be noted that the invention is suitable for small animal in vivo imaging, the diameter of the central through hole of the magnet is smaller than that of a human body whole body imaging system, a person skilled in the art can reasonably select the diameter of the inner hole according to the size of an animal to be detected, the diameter of the inner hole of the existing animal imaging magnet is 200-400 mm, and the inner hole diameter of the magnet corresponding to the invention covers the existing range but is not limited to the range.
The dewar vessel is a double-walled vessel. The vacuum refrigeration environment of the superconducting magnet is formed by utilizing the Dewar container, wherein the refrigerator is arranged at the top end of the outer wall of the Dewar container.
It should be noted that, in the present invention, the material of the cold conducting ring and the material of the cold conducting strip should preferably be selected from materials with high thermal conductivity, and those skilled in the art can reasonably select the material of the cold conducting ring and the material of the cold conducting strip according to the cold conducting requirement, for example, the material of the cold conducting ring and the material of the cold conducting strip are both copper, wherein the cold conducting ring is optionally a large circular ring structure and is coaxially arranged with the superconducting magnet and the cold shield.
As a preferred embodiment of the present invention, the superconducting magnet includes a main magnet, two shielding magnets, and a 4K container.
As is well known to those skilled in the art, a 4K vessel is a vessel that maintains a 4K temperature environment within the vessel.
Preferably, the main magnet is wound in an external wire slot of the main framework by the main coil, the shielding magnets are wound in an external wire slot of the shielding framework by the shielding coil, the two shielding magnets are symmetrically distributed at two ends of the main magnet and are coaxial with the main magnet, and the main magnet and the two shielding magnets are enclosed by the 4K container.
It should be noted that the 4K container of the present invention is optionally disposed coaxially with both the main magnet and the two shielding magnets.
Preferably, the support rod is fixedly connected with a main skeleton of the superconducting magnet.
As a preferable technical scheme of the invention, the main framework is in a symmetrical hollow cylindrical structure.
Preferably, the outer ring of the main frame is provided with at least two first wire slots, and the first wire slots are used for winding the main coil and form a main magnet with the main frame.
As a preferred technical solution of the present invention, the shielding magnet includes a shielding skeleton, and the outer ring of the shielding skeleton is provided with a second wire slot, and the second wire slot is used for winding the shielding coil and forms the shielding magnet with the shielding skeleton.
Preferably, the shielding framework is of a double-layer hollow cylindrical structure.
It should be noted that, as those skilled in the art can understand, the shielding framework is disposed at two ends of the main magnet.
As a preferred embodiment of the present invention, the main coil and the shield coil are coils wound by a superconducting wire.
Preferably, the 4K container is a 4K ultralow temperature environment.
As a preferable technical scheme of the invention, the cold shield is of a closed thin-wall double-cylinder structure.
Preferably, the superconducting magnet and the cold conducting ring are both located inside the closed cylinder of the cold shield.
As a preferred embodiment of the present invention, the cold conducting ring is disposed between the two shielding magnets.
As a preferred technical solution of the present invention, the two ends of the cold conducting strip are provided with connecting fins, one end of the cold conducting strip is connected to the cold conducting ring, the other end of the cold conducting strip is divided into two parts, one part is connected to the shielding coil in the superconducting magnet, and the other part is connected to the main coil in the main magnet.
As a preferred embodiment of the present invention, the main bobbin and the shielding bobbin have an axis coincident with each other.
Preferably, the main framework is connected with the shielding framework in a welding mode.
Preferably, the 4K container is fixed to the main magnet and the two shielding magnets by welding.
As a preferable technical scheme of the invention, one end of the pull rod is connected with the inner wall of the Dewar type container, and the other end of the pull rod is connected with a 4K container in the superconducting magnet.
Preferably, the pull rod is provided with a connecting block, and the connecting block is used for connecting the pull rod with the cold shield.
Preferably, the pull rods are distributed around the end faces of the two sides of the superconducting magnet.
Compared with the prior art, the invention has the beneficial effects that:
the primary refrigeration is realized by directly connecting the primary cold head of the refrigerator with the cold screen, and further, the secondary refrigeration is realized by arranging the cold conduction ring and connecting a plurality of cold conduction belts arranged along the circumferential direction of the cold conduction ring with the coil of the superconducting magnet for heat transfer, so that the synchronous conduction cooling of the circumferential direction of the superconducting magnet is realized, the cooling rate is increased, the temperature field uniformity inside the superconducting magnet is improved, and the good magnetic field uniformity is further ensured. In addition, the superconducting magnet and the cold screen are suspended in the Dewar container through the pull rod, so that the direct contact with the Dewar container is avoided, and the heat leakage of the magnet is reduced. The invention is cooled by the refrigerator without consuming liquid helium, has the characteristics of simple structure, low cost, uniform temperature field and uniform magnetic field, and is suitable for animal imaging.
Drawings
Fig. 1 is a schematic general cross-sectional view of a liquid-helium-free animal imaging superconducting magnet provided in an embodiment of the invention;
fig. 2 is an internal structural view of the superconducting magnet for liquid-helium-free animal imaging according to an embodiment of the present invention.
Wherein, 1-refrigerating machine; 2-primary cold head of refrigerator; 3-secondary cold head of refrigerator; 4-a cold conducting structure; 41-a support bar; 42-a cold conducting ring; 43-cold conduction band; 5-a dewar vessel; 6-cold shielding; 7-a superconducting magnet; 71-main skeleton; 72-a main coil; 73-shielding framework; 74-a shield coil; a 75-4K container; 8-a pull rod.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solution of the present invention is further explained by the following embodiments.
In one embodiment, the present invention provides a liquid-helium-free animal imaging superconducting magnet, as shown in fig. 1 and 2, including a superconducting magnet 7, a liquid-helium-free cryogenic system and a pull rod 8, where the superconducting magnet 7, the liquid-helium-free cryogenic system and the pull rod 8 are all in a vacuum environment.
The liquid-helium-free cryogenic system comprises a refrigerator 1, a refrigerator primary cold head 2, a cold shield 6, a refrigerator secondary cold head 3, a cold conduction structure 4 and a Dewar container 5, wherein the cold shield 6 is sleeved in the Dewar container 5, the superconducting magnet 7 is arranged in the cold shield 6, the cold conduction structure 4 comprises a cold conduction ring 42 and a cold conduction band 43, and the cold conduction ring 42 is arranged around the superconducting magnet 7 and is fixedly connected with the superconducting magnet 7 through a support rod 41; the primary cold head 2 of the refrigerator is directly connected with the cold screen 6 to realize primary refrigeration, the secondary cold head 3 of the refrigerator is directly connected with the cold guide ring 42, and the cold guide ring 42 is connected with a coil of the superconducting magnet 7 through the cold guide belt 43 to realize secondary refrigeration.
The superconducting magnet 7 and the cold shield 6 are suspended inside the Dewar vessel 5 through the pull rod 8.
Optionally, the magnet is suitable for small animal living body imaging, the diameter of an inner hole of the existing animal imaging magnet is 200-400 mm, the diameter of the inner hole of the magnet corresponding to the magnet covers the existing range, and the aperture can be reasonably selected according to the size of an animal to be measured for design.
Specifically, the refrigerator 1 is arranged at the top end of the outer wall of the Dewar container 5; the material of the cold conduction ring 42 and the material of the cold conduction band 43 are both copper, and the cold conduction ring 42 is of a large circular ring structure and is arranged coaxially with the superconducting magnet 7 and the cold shield 6.
Specifically, the superconducting magnet 7 includes a main magnet, two shield magnets, and a 4K vessel 75. Further, the main magnet is wound in an external wire slot of the main frame 71 by the main coil 72, the shielding magnet is wound in an external wire slot of the shielding frame 73 by the shielding coil 74, the two shielding magnets are symmetrically distributed at two ends of the main magnet and are coaxial with the main magnet, the main magnet and the two shielding magnets are enclosed by the 4K container 75, and optionally, the 4K container 75 is coaxial with both the main magnet and the two shielding magnets.
Specifically, the support rod 41 is fixedly connected to the main skeleton 71 of the superconducting magnet 7.
Specifically, the main frame 71 is a symmetrical hollow cylindrical structure. Further, at least two first wire slots are arranged on the outer ring of the main framework 71, and the first wire slots are used for winding the main coil 72 and form a main magnet with the main framework 71.
Specifically, the shield magnet includes a shield bobbin 73, an outer ring of the shield bobbin 73 is provided with a second wire groove for winding the shield coil 74, forming a shield magnet with the shield bobbin 73. Further, the shielding framework 73 has a double-layer hollow cylindrical structure.
Specifically, the main coil 72 and the shield coil 74 are coils wound with superconducting wires. The 4K container 75 is a 4K ultra low temperature environment.
Specifically, the cold shield 6 is of a closed thin-wall double-cylinder structure. The superconducting magnet 7 and the cold conducting ring 42 are both located inside the closed cylinder of the cold shield 6.
Specifically, the cold conducting ring 42 is disposed centrally between the two shield magnets.
Specifically, the cold conducting strip 43 has connecting fins at two ends, one end of the cold conducting strip 43 is connected to the cold conducting ring 42, the other end is divided into two parts, one part is connected to the shielding coil 74 in the superconducting magnet 7, and the other part is connected to the main coil 72 in the main magnet.
Specifically, the main bobbin 71 coincides with the axis of the shielding bobbin 73.
Specifically, the main frame 71 and the shielding frame 73 are connected by welding. The 4K container 75 is fixed to the main magnet and the two shield magnets by welding.
Specifically, one end of the pull rod 8 is connected with the inner wall of the dewar vessel 5, and the other end is connected with a 4K vessel 75 in the superconducting magnet 7.
Specifically, the pull rod 8 is provided with a connecting block, and the connecting block is used for connecting the pull rod 8 with the cold shield 6. Furthermore, the pull rods 8 are distributed around the end surfaces of the two sides of the superconducting magnet 7.
According to a specific embodiment, the primary refrigeration is realized by directly connecting the primary cold head 2 of the refrigerator with the cold screen 6, and further, the secondary refrigeration is realized by arranging the cold guide ring 42 and connecting the plurality of cold guide belts 43 arranged along the circumferential direction of the cold guide ring 42 with the coil of the superconducting magnet 7 for heat transfer, so that the synchronous conduction cooling of the circumferential direction of the superconducting magnet 7 is realized, the cooling rate is increased, the uniformity of the temperature field inside the superconducting magnet 7 is improved, and the good uniformity of the magnetic field is further ensured. In addition, the superconducting magnet 7 and the cold shield 6 are suspended in the Dewar container 5 through the pull rod 8, so that the direct contact with the Dewar container 5 is avoided, and the heat leakage of the magnet is reduced. The invention is cooled by the refrigerator 1 without consuming liquid helium, and has the characteristics of simple structure, low cost, uniform temperature field and uniform magnetic field.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The liquid-helium-free animal imaging superconducting magnet is characterized by comprising a superconducting magnet, a liquid-helium-free cryogenic system and a pull rod, wherein the superconducting magnet, the liquid-helium-free cryogenic system and the pull rod are all in a vacuum environment;
the liquid helium-free cryogenic system comprises a refrigerator, a refrigerator primary cold head, a cold shield, a refrigerator secondary cold head, a cold conduction structure and a Dewar container, wherein the cold shield is sleeved in the Dewar container, the superconducting magnet is arranged in the cold shield, the cold conduction structure comprises a cold conduction ring and a cold conduction belt, and the cold conduction ring is arranged around the superconducting magnet and is fixedly connected with the superconducting magnet through a support rod; a primary cold head of the refrigerator is directly connected with the cold screen to realize primary refrigeration, a secondary cold head of the refrigerator is directly connected with a cold guide ring, and the cold guide ring is connected with a coil of the superconducting magnet through a cold guide belt to realize secondary refrigeration;
the superconducting magnet and the cold shield are suspended inside the Dewar container through the pull rod.
2. The liquid-free helium animal imaging superconducting magnet of claim 1, wherein the superconducting magnet comprises a main magnet, two shield magnets, and a 4K vessel;
preferably, the main magnet is wound in an external wire slot of the main framework by the main coil, the shielding magnets are wound in the external wire slot of the shielding framework by the shielding coil, the two shielding magnets are symmetrically distributed at two ends of the main magnet and are coaxial with the main magnet, and the main magnet and the two shielding magnets are enclosed by the 4K container;
preferably, the support rod is fixedly connected with a main skeleton of the superconducting magnet.
3. The liquid-helium-free animal imaging superconducting magnet of claim 2, wherein the main former is a symmetrical hollow cylindrical structure;
preferably, the outer ring of the main frame is provided with at least two first wire slots, and the first wire slots are used for winding the main coil and form a main magnet with the main frame.
4. The liquid-helium-free animal imaging superconducting magnet according to any one of claims 1-3, wherein the shielding magnet comprises a shielding skeleton, the outer ring of the shielding skeleton is provided with a second wire groove, and the second wire groove is used for winding a shielding coil to form a shielding magnet with the shielding skeleton;
preferably, the shielding framework is of a double-layer hollow cylindrical structure.
5. The liquid helium free animal imaging superconducting magnet of any one of claims 1-4, wherein the main coil and the shielding coil are coils wound of superconducting wire;
preferably, the 4K container is a 4K ultralow temperature environment.
6. The liquid helium-free animal imaging superconducting magnet according to any one of claims 1-5, wherein the cold shield is a closed thin-walled double-cylinder structure;
preferably, the superconducting magnet and the cold conducting ring are both located inside the closed cylinder of the cold shield.
7. The liquid helium-free animal imaging superconducting magnet of any of claims 1-6, wherein the cold conducting ring is centrally disposed between two of the shielding magnets.
8. The liquid-helium-free animal imaging superconducting magnet according to any one of claims 1-7, wherein the cold conducting strip is provided with connecting fins at two ends, one end of the cold conducting strip is connected with a cold conducting ring, the other end of the cold conducting strip is divided into two parts, one part is connected with a shielding coil in the superconducting magnet, and the other part is connected with a main coil in the main magnet.
9. The liquid helium-free animal imaging superconducting magnet of any one of claims 1-8, wherein the main former and the shielding former have axes that coincide;
preferably, the main framework is connected with the shielding framework in a welding mode;
preferably, the 4K container is fixed to the main magnet and the two shielding magnets by welding.
10. The liquid-helium-free animal imaging superconducting magnet according to any one of claims 1-9, wherein one end of the pull rod is connected with the inner wall of a dewar vessel, and the other end is connected with a 4K vessel in the superconducting magnet;
preferably, the pull rod is provided with a connecting block, and the connecting block is used for connecting the pull rod with the cold shield;
preferably, the pull rods are distributed around the end faces of the two sides of the superconducting magnet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111128027.5A CN113871132A (en) | 2021-09-26 | 2021-09-26 | Non-liquid helium superconducting magnet for animal imaging |
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| CN202111128027.5A CN113871132A (en) | 2021-09-26 | 2021-09-26 | Non-liquid helium superconducting magnet for animal imaging |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114512295A (en) * | 2022-01-27 | 2022-05-17 | 中国科学院电工研究所 | High-uniform magnetic field conduction cooling superconducting magnet system |
| CN114724796A (en) * | 2022-06-09 | 2022-07-08 | 山东奥新医疗科技有限公司 | Magnetic resonance superconducting magnet with novel structure |
| CN115910516A (en) * | 2022-11-28 | 2023-04-04 | 先进能源科学与技术广东省实验室 | Open gradient low-temperature superconducting magnet system based on multi-pole coil and magnetic separation device |
| CN117269865A (en) * | 2023-11-20 | 2023-12-22 | 中国科学院电工研究所 | High-field animal magnetic resonance imaging conduction cooling superconducting magnet structure |
-
2021
- 2021-09-26 CN CN202111128027.5A patent/CN113871132A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114512295A (en) * | 2022-01-27 | 2022-05-17 | 中国科学院电工研究所 | High-uniform magnetic field conduction cooling superconducting magnet system |
| CN114724796A (en) * | 2022-06-09 | 2022-07-08 | 山东奥新医疗科技有限公司 | Magnetic resonance superconducting magnet with novel structure |
| CN115910516A (en) * | 2022-11-28 | 2023-04-04 | 先进能源科学与技术广东省实验室 | Open gradient low-temperature superconducting magnet system based on multi-pole coil and magnetic separation device |
| CN115910516B (en) * | 2022-11-28 | 2023-11-03 | 先进能源科学与技术广东省实验室 | Open gradient low-temperature superconducting magnet system based on multipolar coil and magnetic separation device |
| CN117269865A (en) * | 2023-11-20 | 2023-12-22 | 中国科学院电工研究所 | High-field animal magnetic resonance imaging conduction cooling superconducting magnet structure |
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Address after: 341000 No. 1, chutanwei Academy of Sciences Road, Chutan Town, Ganxian District, Ganzhou City, Jiangxi Province Applicant after: Jiangxi Rare Earth Research Institute Chinese Academy of Sciences Address before: 341003 No.36, Huangjin Avenue, Ganzhou economic and Technological Development Zone, Ganzhou City, Jiangxi Province Applicant before: Jiangxi Rare Earth Research Institute Chinese Academy of Sciences |
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