CN217239186U

CN217239186U - Ion trap permanent magnet device and nuclear magnetic resonance system

Info

Publication number: CN217239186U
Application number: CN202221627696.7U
Authority: CN
Inventors: 李晓刚; 李岳; 刘志超; 刘扬扬
Original assignee: Chinainstru and Quantumtech Hefei Co Ltd
Current assignee: Guoyi Quantum Technology Hefei Co ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2022-08-19
Anticipated expiration: 2032-06-28

Abstract

The utility model discloses an ion trap permanent magnet device and nuclear magnetic resonance system that has ion trap permanent magnet device, ion trap permanent magnet device includes: a mounting bracket having a mounting cavity; the permanent magnet is arranged in the mounting cavity and used for forming a magnet loop; heating element, heating element includes the heating member, the heating member is located just be used for adjusting in the installation cavity the temperature in the installation cavity. According to the utility model discloses ion trap permanent magnet device adjusts the temperature in the installation cavity through heating member, utilizes the magnetic induction of permanent magnet to adjust the produced magnetic field intensity of permanent magnet along with the characteristic that temperature variation changed to satisfy the demand of ion trap chip to magnetic field environment, for example can make the magnetic field environment that the ion trap chip is located remain stable, guarantee that the ion trap chip normally works.

Description

Ion trap permanent magnet device and nuclear magnetic resonance system

Technical Field

The utility model relates to a magnetic field compensation arrangement technical field, more specifically relates to an ion trap permanent magnet device and nuclear magnetic resonance system.

Background

The ion trap chip needs to be in a stable magnetic field environment with small intensity fluctuation and strict fluctuation range requirements for normal work. In the related art, a magnetic field environment is provided for the ion trap chip through the permanent magnet, but the permanent magnet is sensitive to temperature change, the magnetic induction intensity generated at the chip position can change along with the temperature change of the permanent magnet, so that the magnetic field environment of the ion trap chip is unstable, and even the system fails when the temperature fluctuation range is larger than 10 mK.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide an ion trap permanent magnet device, ion trap permanent magnet device can adjust the temperature of permanent magnet department environment to satisfy the magnetic field demand.

Another object of the present invention is to provide a nuclear magnetic resonance system having the above ion trap permanent magnet device.

According to the utility model discloses ion trap permanent magnet device, include: a mounting bracket having a mounting cavity; the permanent magnet is arranged in the mounting cavity and used for forming a magnet loop; heating element, heating element includes the heating member, the heating member is located just be used for adjusting in the installation cavity the temperature in the installation cavity.

According to the utility model discloses ion trap permanent magnet device adjusts the temperature in the installation cavity through heating member, utilizes the magnetic induction of permanent magnet to adjust the produced magnetic field intensity of permanent magnet along with the characteristic that temperature variation changed to satisfy the demand of ion trap chip to magnetic field environment, for example can make the magnetic field environment that the ion trap chip is located remain stable, guarantee that the ion trap chip normally works.

In addition, the ion trap permanent magnet device according to the above embodiment of the present invention may further have the following additional technical features:

according to some embodiments of the invention, the installation cavity is a sealed cavity.

According to some embodiments of the invention, the mounting bracket comprises: the bracket comprises a bracket body, wherein the bracket body is provided with a groove, and the groove is provided with an end notch; the sealing cover is detachably arranged on the support body and used for covering the end notch so as to be matched with the support body to limit the mounting cavity.

According to some embodiments of the invention, the mounting bracket is made of a thermally insulating material.

According to the utility model discloses a some embodiments, the permanent magnet with be equipped with high temperature resistant heat-conducting layer between the heating member.

According to some embodiments of the invention, the heating element is a heating coil wound around the permanent magnet.

According to some embodiments of the invention, the heating coil comprises a first wire and a second wire in series, the first wire and the second wire being parallel and in series with each other.

According to some embodiments of the invention, the heating coil comprises a plurality of bending sections, a plurality of the bending sections are connected in sequence along the winding direction.

According to the utility model discloses a some embodiments, the installation cavity is the annular chamber, the installing support still is equipped with and encircles the holding tank of annular chamber, be equipped with magnetic field compensation coil in the holding tank.

According to the utility model discloses nuclear magnetic resonance system includes according to the utility model discloses ion trap permanent magnet device of embodiment.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an ion trap permanent magnet arrangement according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another view of an ion trap permanent magnet arrangement according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a schematic structural view of a stent body according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a permanent magnet and a heating coil according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a permanent magnet according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a closure according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a heating coil and a high-temperature-resistant heat-conducting layer according to an embodiment of the present invention.

Reference numerals are as follows:

an ion trap permanent magnet arrangement 100;

a mounting bracket 10; a holder body 11; a recess 110; end notches 1101; a cover 12; a mounting cavity 101; an accommodating groove 112; an elastic clamp 13;

a permanent magnet 20; a heating assembly 30; a heating member 31; a first conductive line 311; a second conductive line 312; a bend section 3110; a high temperature resistant thermally conductive layer 32.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, "a first feature" or "a second feature" may include one or more of the features, and "a plurality" means two or more, and the first feature may be "on" or "under" the second feature, and may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature therebetween, and the first feature being "on", "above" and "above" the second feature may include the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is higher in level than the second feature.

An ion trap permanent magnet arrangement 100 according to an embodiment of the present invention is described below with reference to the drawings.

Referring to fig. 1, 2, 5 and 6, an ion trap permanent magnet arrangement 100 according to an embodiment of the present invention may include: a mounting bracket 10 and a permanent magnet 20.

Specifically, as shown in fig. 1, the mounting bracket 10 has a mounting cavity 101, and the mounting cavity 101 can be used for mounting the permanent magnet 20 to achieve mounting and fixing of the permanent magnet 20. The permanent magnet 20 is installed in the installation cavity 101, and is used for forming a magnet loop and providing a magnetic field environment for the ion trap chip.

It should be noted that the ion trap chip needs a stable magnetic field environment with small intensity fluctuation and strict fluctuation range requirements to ensure that the ion trap chip can work normally. The permanent magnet 20 is sensitive to temperature change, and the magnetic induction intensity generated by the permanent magnet 20 changes along with the temperature change of the permanent magnet, so that the ion trap chip cannot be in a stable magnetic field environment, and more seriously, the system is out of control due to the fluctuation of the magnetic induction intensity along with the temperature.

In the embodiment of the present invention, the ion trap permanent magnet device 100 further includes a heating component 30, the heating component 30 may include a heating component 31, the heating component 31 is disposed in the installation cavity 101, and the heating component 31 may be used to adjust the temperature in the installation cavity 101. The temperature in the installation cavity 101 is adjusted by the heating member 31, and the permanent magnet 20 is installed in the installation cavity 101, and the temperature changes after the permanent magnet 20 absorbs the heat emitted from the heating member 31. Because the magnetic field intensity generated by the permanent magnet 20 has the characteristic of changing along with the temperature, the magnetic field intensity generated by the permanent magnet 20 can be adjusted by controlling the temperature of the heating element 31, so that the requirement of the ion trap chip on the magnetic field environment can be met.

For example, there is the difference in the nature of different permanent magnets 20, and to different ion trap chips, required magnetic field intensity may exist differently, the utility model discloses can cooperate with the permanent magnet 20 of different nature in order to produce the magnetic field of the same intensity through the temperature in adjusting installation cavity 101, avoid leading to the magnetic field environment requirement of ion trap chip not up to standard because of permanent magnet 20 nature difference, perhaps can cooperate with the magnetic field in order to produce different intensity through the permanent magnet 20 of temperature in adjusting installation cavity 101 and the same nature to satisfy the different magnetic field environment demands of different ion trap chips, increased adaptability and the flexibility of ion trap permanent magnet device 100.

In some embodiments, since the temperature of the working environment of the ion trap chip is low and the temperature of the permanent magnet 20 needs to be higher than the temperature of the working environment of the ion trap chip, the temperature of the permanent magnet 20 is easily lost without compensating the temperature of the permanent magnet 20, which results in system failure. The temperature that this embodiment can control in the installation cavity 101 through heating element 30 maintains at required temperature of predetermineeing, form the constant temperature environment, permanent magnet 20 is installed in installation cavity 101, so that the temperature of permanent magnet 20 self is stable, do not receive the influence of the operational environment temperature of ion trap chip, and then make the produced magnetic field of permanent magnet 20 can be in stable state, in order to satisfy the demand of ion trap chip to the stable magnetic field environment, guarantee the normal work of ion trap chip, avoid the system failure.

According to the utility model discloses ion trap permanent magnet device 100 adjusts the temperature in the installation cavity 101 through heating member 31, utilizes permanent magnet 20's magnetic induction intensity to adjust the produced magnetic field intensity of permanent magnet 20 along with the characteristic that temperature variation changed to satisfy the demand of ion trap chip to magnetic field environment, for example can make the magnetic field environment that the ion trap chip was located remain stable, guarantee that the ion trap chip normally works.

In some embodiments, the ion trap permanent magnet device 100 may further be provided with a temperature sensor for detecting the temperature in the installation cavity 101, so as to accurately measure the temperature in the installation cavity 101. And, heating element 30 can adjust operating condition such as heating power, heating time according to temperature sensor's testing result, and the accuracy that makes heating member 31 adjust the temperature in installation cavity 101 is higher to satisfy the operating mode demand.

Furthermore, in the embodiment of the present invention, the permanent magnet 20 should be shaped to provide a required magnetic field environment for the ion trap chip, and the shape of the installation cavity 101 should be shaped to meet the installation requirement of the permanent magnet 20. In some specific embodiments, the permanent magnet 20 is an annular permanent magnet 20, the corresponding installation cavity 101 is annular, the shape of the installation cavity 101 is matched with the shape of the permanent magnet 20, and the size of the space of the installation cavity 101 is reduced as much as possible, so as to improve the sensitivity of temperature adjustment in the installation cavity 101 and ensure that the temperature adjustment and the magnetic field intensity adjustment can respond quickly.

In some embodiments, the outer peripheral surface of the mounting bracket 10 may further include two oppositely disposed elastic bands 13, and each elastic band 13 is provided with a screw hole for matching the mounting bracket 10 with a mounting environment, so as to ensure the stability and convenience of mounting the mounting bracket 10.

According to the utility model discloses a some embodiments, as shown in FIG. 3, installation cavity 101 can be the seal chamber, and the seal chamber can the significantly reduced installation cavity 101 with outside heat exchange, be favorable to improving sensitivity and response speed to temperature regulation in installation cavity 101.

Specifically, when making installation cavity 101 be in a certain temperature state through adjusting heating member 31, the produced magnetic field intensity of permanent magnet 20 is stable, and installation cavity 101 is the sealed chamber, and the temperature in the installation cavity 101 that can significantly reduce runs off, avoids ion trap chip operational environment's temperature to influence the temperature in installation cavity 101, is favorable to improving the stability in the produced magnetic field of permanent magnet 20, makes magnetic field intensity satisfy the demand of the normal work of ion trap chip. Moreover, if the installation cavity 101 is in a state of being capable of communicating with the outside, the heat generated by the heating element 31 is continuously diffused to the outside, the heating element 30 needs to additionally work to compensate the heat loss, and the installation cavity 101 is a sealed cavity, so that the heat loss can be avoided, the energy is saved, and the energy loss is reduced.

In some embodiments, the mounting bracket 10 includes a bracket body 11 and a cover 12, the bracket body 11 is provided with a groove 110, the groove 110 has an end notch 1101, and the end notch 1101 can be used for mounting and dismounting the permanent magnet 20.

In some specific embodiments, as shown in fig. 4 and 7, the bracket body 11 is annular, and one end of the groove 110 along the axial direction of the ring is open to form an end notch 1101, so that an operator can conveniently assemble and disassemble the permanent magnet 20.

And, a cover 12 is detachably mounted to the holder body 11, the cover 12 being configured to cover the end notch 1101 to define the mounting cavity 101 in cooperation with the holder body 11. Specifically, when the cover 12 covers the end notch 1101, a sealed installation cavity 101 can be formed, and heat loss in the installation cavity 101 is avoided; when the cover 12 is removed from the end notch 1101, the permanent magnet 20 can be replaced for ease of operation.

In some embodiments, as shown in fig. 4 and 6, the bracket body 11, the groove 110 and the permanent magnet 20 are all ring-shaped structures, and the three may be coaxially disposed, and the shape of the permanent magnet 20 is adapted to the groove 110, so as to reduce the space size of the groove 110. When the cover 12 covers the end part notch 1101 to form the sealed installation cavity 101, the space in the installation cavity 101 is reduced, so that the sensitivity of temperature adjustment in the installation cavity 101 can be improved, and the quick response of temperature adjustment and magnetic field intensity adjustment is ensured.

In some embodiments, the mounting bracket 10 may be made of a thermally insulating material that may be used to prevent loss of thermal energy generated by the heating element 31 within the mounting cavity 101.

In some specific embodiments, the installation cavity 101 is a sealed cavity, and the installation cavity 101 uses a heat insulating material, the sealed cavity has an effect of preventing heat loss caused by circulation of air between the inside and the outside, and the heat insulating material can also prevent heat loss caused by heat conduction. Therefore, when the heating element 31 adjusts the temperature in the installation cavity 101 to reach the preset temperature, the temperature in the installation cavity 101 can be kept stable without being influenced by the temperature of the working environment of the ion trap chip, and the magnetic field intensity generated by the permanent magnet 20 in the installation cavity 101 is stable.

The kind of the heat insulating material according to the present invention is not limited, and the heat insulating material may be tetrafluoroethylene, ABS (terpolymer of three monomers of acrylonitrile (a), butadiene (B), and styrene (S)), PEEK (poly-ether-ketone), or the like. In some embodiments, the better thermal insulation and heat preservation effects can be achieved by using tetrafluoroethylene as the mounting bracket 10.

In some embodiments of the present invention, a teflon integrated adiabatic fast mount mounting bracket 10 may be used, which on the one hand has an adiabatic support effect for the heating assembly 30 and the permanent magnet 20; on the other hand, the integrated mounting bracket 10 has a simple structure and a small size, and can reduce the processing difficulty and the manufacturing cost.

According to some embodiments of the present invention, as shown in fig. 5 and 8, a high temperature heat conductive layer 32 is provided between the permanent magnet 20 and the heating member 31. Specifically, the heating member 31 radiates heat and conducts the heat to the high-temperature-resistant heat conduction layer 32, and the high-temperature-resistant heat conduction layer 32 transfers heat energy to the permanent magnet 20, so that the permanent magnet 20 is uniformly heated as a whole, and the condition that the magnetic field intensity is uneven due to uneven heating is avoided. In addition, the contact area between the laminated structure of the high-temperature heat-resistant heat-conducting layer 32 and the permanent magnet 20 is large, and the heat-conducting efficiency is improved.

The embodiment of the utility model provides a do not do special restriction to high temperature resistant heat-conducting layer 32's material, for example high temperature resistant heat-conducting layer 32 can adopt PI (Polyimide ) material, and Polyimide has good heat resistance, and thermal oxidation resistance is ageing, can not influence life because of contact high temperature at the heat conduction in-process. And has good thermal conductivity, and can effectively conduct the heat energy generated by the heating member 31.

And, PI (Polyimide) has good flexibility. In some embodiments, as shown in fig. 5, the high temperature heat conductive layer 32 may be wrapped around the permanent magnet 20, increasing the contact area between the high temperature heat conductive layer 32 and the permanent magnet 20, and facilitating the contact fit of the high temperature heat conductive layer 32 with the entire outer surface of the permanent magnet 20, which facilitates uniform heating of the permanent magnet 20.

According to some embodiments of the present invention, as shown in fig. 5, the heating member 31 may be a heating coil, which has a fast reaction speed and can respond to the temperature control requirement quickly.

Further, the heating coil is easy to deform and can be wound on the permanent magnet 20 to increase the area for heating the permanent magnet 20, and the heating coil can directly heat the permanent magnet 20 without indirectly heating the permanent magnet 20 completely through the hot air in the installation cavity 101, so that the heating coil can more efficiently and accurately control the temperature of the permanent magnet 20, and the heating efficiency is improved.

In some embodiments, the heating coil is uniformly wound around the permanent magnet 20, so that the permanent magnet 20 is uniformly heated, and the uniformity of the magnetic field generated by the permanent magnet 20 is improved.

In some embodiments including the heat-resistant heat-conducting layer 32, during the production process, the heat-resistant heat-conducting layer 32 may be wound on the surface of the permanent magnet 20, and then the heating coil may be wound outside the heat-resistant heat-conducting layer 32, so that the heat-resistant heat-conducting layer 32 is located between the permanent magnet 20 and the heating coil, thereby avoiding the local over-temperature of the permanent magnet 20 caused by the direct contact between the heating coil and the permanent magnet 20. Of course, according to actual needs, the high temperature resistant heat conduction layer 32 may be wrapped by the heating coil, and then the wrapped heating coil is wound on the permanent magnet 20, so as to improve the uniformity of heating of the permanent magnet 20.

In some embodiments, as shown in fig. 8, the heating coil includes a first conductive wire 311 and a second conductive wire 312, the first conductive wire 311 and the second conductive wire 312 are parallel to each other and the current direction is opposite, ensuring that the magnetic field generated by the heating coil does not cause new interference with the magnetic field generated by the permanent magnet 20.

Specifically, after the heating coil is energized, magnetic fields are respectively generated on the first conducting wire 311 and the second conducting wire 312, and since the current directions of the first conducting wire 311 and the second conducting wire 312 are opposite and are arranged in parallel, the magnetic fields generated by the first conducting wire 311 and the second conducting wire 312 are opposite and offset with each other, so that magnetic interference on the magnetic field generated by the permanent magnet 20 is avoided, and the influence on the grabbing of ions in the ion trap permanent magnet device 100 is avoided.

It should be noted that, the first conductive line 311 and the second conductive line 312 may be disposed in parallel or disposed in series, which is within the protection scope of the present invention. As shown in fig. 8, a single wire is folded in half to form a first wire 311 and a second wire 312 which are parallel to each other, the current directions of the first wire 311 and the second wire 312 are opposite, and only one end of the whole heating coil is provided with a terminal, so that the structure is simplified, and the wire winding operation of the heating coil is simplified.

In some embodiments, the heating coil may be meandered to increase an area for heating the permanent magnet 20, thereby improving sensitivity and response speed to temperature control, and improving uniformity of heating of the permanent magnet 20.

Specifically, as shown in fig. 8, the heating coil may include a plurality of bent sections 3110, and the plurality of bent sections 3110 are sequentially connected in a winding direction, which is a direction in which the heating coil is wound on the permanent magnet 20. The bending structure of bending section 3110 can increase the whole length of winding heating coil on permanent magnet 20 to promote the efficiency that heating coil adjusted the temperature, ability quick response temperature control demand.

It should be noted that the shape of the bending section 3110 is not limited in the embodiments of the invention, for example, the bending section 3110 may be regular geometric shapes, arcs, triangles, or other irregular shapes. In some embodiments, as shown in fig. 8, the bent section 3110 has a zigzag shape, which can effectively increase the length of the heating coil and is easy to process.

In some embodiments in which the heating coil includes the first conductive wire 311 and the second conductive wire 312, as shown in fig. 8, each bent section 3110 may be formed of a portion in which the first conductive wire 311 and the second conductive wire 312 are parallel to each other. In other words, the first conductive line 311 and the second conductive line 312 are bent and extended along the same shape to form a plurality of bent segments 3110.

In some embodiments of the utility model, as shown in fig. 5, heating coil evenly twines along the outer peripheral face of annular permanent magnet 20, and a plurality of bent sections 3110 evenly connect in proper order along the winding direction as shown in fig. 5, both satisfied the demand of annular permanent magnet 20 thermally equivalent, increased heating coil's length again, improved the speed of control by temperature change response.

According to some embodiments of the utility model, as shown in fig. 1, fig. 2 and fig. 6, installation cavity 101 can be the annular chamber, and installing support 10 still is equipped with the holding tank 112 that encircles the annular chamber, can be equipped with magnetic field compensation coil in the holding tank 112, and the circular telegram of magnetic field compensation coil can produce the compensation magnetic field to form the required magnetic field environment of ion trap chip with the magnetic field cooperation that permanent magnet 20 produced. And, magnetic field compensation coil can cooperate with heating element 30, adjusts the magnetic field intensity that ion trap permanent magnet device 100 produced jointly, is favorable to making magnetic field intensity adjust more sensitively swiftly.

In the embodiment that the mounting bracket 10 is made of a heat insulating material, the magnetic field compensation coil may be separated from the mounting cavity 101 by the mounting bracket 10, so as to prevent heat generated by the operation of the magnetic field compensation coil from interfering with the temperature of the permanent magnet 20 in the mounting cavity 101, which is beneficial to improving the temperature stability of the permanent magnet 20 and the stability of the generated magnetic field.

According to the utility model discloses a nuclear magnetic resonance system includes according to the utility model discloses an ion trap permanent magnet device 100, because according to the utility model discloses ion trap permanent magnet device 100 has above-mentioned profitable technological effect, consequently according to the utility model discloses a nuclear magnetic resonance system adjusts the temperature in the installation cavity 101 through heating member 31, utilizes permanent magnet 20's magnetic induction intensity along with the characteristic that the temperature variation changes, adjusts the produced magnetic field intensity of permanent magnet 20 to satisfy the demand of ion trap chip to magnetic field environment, for example can make the magnetic field environment that the ion trap chip locates maintain stably, guarantee that the ion trap chip normally works.

Other configurations and operations of nuclear magnetic resonance systems according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "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 in specific cases to those skilled in the art.

In the description herein, references to the description of the terms "embodiment," "specific embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An ion trap permanent magnet arrangement, comprising:

a mounting bracket having a mounting cavity;

the permanent magnet is arranged in the mounting cavity and used for forming a magnet loop;

heating element, heating element includes the heating member, the heating member is located just be used for adjusting in the installation cavity the temperature in the installation cavity.

2. The ion trap permanent magnet arrangement of claim 1, wherein the mounting cavity is a sealed cavity.

3. The ion trap permanent magnet apparatus of claim 2, wherein the mounting bracket comprises:

the bracket comprises a bracket body, wherein the bracket body is provided with a groove, and the groove is provided with an end notch;

the sealing cover is detachably arranged on the support body and used for covering the end notch so as to be matched with the support body to limit the mounting cavity.

4. The ion trap permanent magnet arrangement of claim 1, wherein the mounting bracket is a thermally insulating material.

5. The ion trap permanent magnet assembly of claim 1 wherein a high temperature heat conductive layer is disposed between the permanent magnet and the heating element.

6. The ion trap permanent magnet assembly of claim 1 wherein the heating element is a heating coil wound around the permanent magnet.

7. The ion trap permanent magnet arrangement of claim 6, wherein the heating coil comprises a first wire and a second wire, the first wire and the second wire being parallel and in series with each other.

8. The ion trap permanent magnet arrangement of claim 6, wherein the heating coil comprises a plurality of meander sections, the meander sections being connected in series along a winding direction.

9. The ion trap permanent magnet assembly of any one of claims 1-8, wherein the mounting cavity is an annular cavity, the mounting bracket further comprising a receiving slot surrounding the annular cavity, the receiving slot having a magnetic field compensation coil disposed therein.

10. A nuclear magnetic resonance system comprising an ion trap permanent magnet arrangement according to any one of claims 1 to 9.