阅读说明：本技术 一种质子重离子医疗设备超导二极铁快速励磁测试装置 (Fast excitation testing device for superconducting dipolar iron of proton heavy ion medical equipment ) 是由 郑金星 宋云涛 郑书悦 陆坤 黄迪西 朱小亮 程远 刘海洋 于 2020-06-17 设计创作，主要内容包括：一种质子重离子医疗设备超导二极铁快速励磁测试装置,包括低温杜瓦罐、真空系统、制冷机组、外部液氮容器、外部液氦容器、液氦储罐、超导二极铁、温度传感器、电源及失超保护系统、监控系统；所述低温杜瓦罐与真空系统、制冷机组、外部液氮容器相连接,所述液氦储罐安装在低温杜瓦罐内,分别与外部液氮容器、超导二极铁相连接,所述超导二极铁安装在低温杜瓦罐内,分别与电源及失超保护系统、监控系统相连接,所述温度传感器安装在超导二极铁各部分,与监控系统连接,所述监控系统分别与真空系统中真空规、液氦储罐中液位计、电源及失超保护系统中超导磁体电源相连接；本发明提出了完善的装置对超导二极铁励磁进行快速测试,为低温超导技术的应用提供可靠保证。(A fast excitation testing device for a proton heavy ion medical device superconducting dipolar iron comprises a low-temperature dewar tank, a vacuum system, a refrigerating unit, an external liquid nitrogen container, an external liquid helium container, a liquid helium storage tank, a superconducting dipolar iron, a temperature sensor, a power supply and quench protection system and a monitoring system; the low-temperature Dewar flask is connected with a vacuum system, a refrigerating unit and an external liquid nitrogen container, the liquid helium storage tank is installed in the low-temperature Dewar flask and is respectively connected with the external liquid nitrogen container and superconducting dipolar iron, the superconducting dipolar iron is installed in the low-temperature Dewar flask and is respectively connected with a power supply, a quench protection system and a monitoring system, the temperature sensor is installed on each part of the superconducting dipolar iron and is connected with the monitoring system, and the monitoring system is respectively connected with a vacuum gauge in the vacuum system, a liquid level meter in the liquid helium storage tank, the power supply and a superconducting magnet power supply in the quench protection system; the invention provides a perfect device for rapidly testing the excitation of the superconducting dipolar iron, and provides reliable guarantee for the application of the low-temperature superconducting technology.)

1. A proton heavy ion medical equipment superconducting dipolar iron fast excitation testing arrangement which characterized in that includes: the system comprises a low-temperature dewar tank (1), a vacuum system (2), a refrigerating unit (3), an external liquid nitrogen container (4), an external liquid helium container (5), a liquid helium storage tank (6), superconducting dipolar iron (7), a temperature sensor (8), a power supply and quench protection system (9) and a monitoring system (10); the low-temperature Dewar flask (1) is connected with a vacuum system (2), a refrigerating unit (3) and an external liquid nitrogen container (4), the liquid helium storage tank (6) is installed in the low-temperature Dewar flask (1) and is respectively connected with the external liquid nitrogen container (5) and a superconducting dipolar iron (7), the superconducting dipolar iron (7) is installed in the low-temperature Dewar flask (1) and is respectively connected with a power supply, a quench protection system (9) and a monitoring system (10), a plurality of temperature sensors (8) are installed in each part of the superconducting dipolar iron (7) and are connected with the monitoring system (10), and the monitoring system (10) is respectively connected with a vacuum gauge in the vacuum system (2), a liquid level meter in the liquid helium storage tank (6), the power supply and a superconducting magnet power supply in the quench protection system (9).

2. The proton heavy ion medical equipment superconducting dipolar iron fast excitation testing device of claim 1, characterized in that: the vacuum system (2) comprises a composite molecular pump, a mechanical pump and a vacuum gauge, wherein the composite molecular pump and the mechanical pump are hermetically connected with the low-temperature Dewar tank (1), and the vacuum system is equipment for pumping air in the low-temperature Dewar tank (1) to obtain vacuum, wherein the vacuum gauge is installed on a vacuum tube and used for monitoring the vacuum degree in the low-temperature Dewar tank (1), is connected with the monitoring system (10), and uploads vacuum degree data information to the monitoring system (10).

3. The proton heavy ion medical equipment superconducting dipolar iron fast excitation testing device of claim 1, characterized in that: the external liquid helium container (5) comprises a liquid helium valve and a liquid conveying pipe, liquid helium is filled into the liquid helium storage tank (6) through the liquid conveying pipe, so that the temperature of the superconducting dipolar iron (7) is rapidly reduced, and the temperature of the low-temperature dewar tank (1) and the temperature of the magnet are finally reduced to 4.2K, namely the running temperature of the superconducting dipolar iron (7).

4. The proton heavy ion medical equipment superconducting dipolar iron fast excitation testing device of claim 1, characterized in that: the liquid helium storage tank (6) comprises a storage tank and a liquid level meter, wherein the storage tank is installed in the low-temperature dewar tank (1) through a supporting piece, stable liquid helium is provided for the superconducting dipolar iron (7), the liquid level meter is installed in the storage tank, the liquid level of the liquid helium is monitored, the liquid level helium is connected with the monitoring system (10), and liquid level data information is uploaded to the monitoring system (10).

5. The proton heavy ion medical equipment superconducting dipolar iron fast excitation testing device of claim 1, characterized in that: the superconducting magnet dipolar iron (7) comprises a superconducting magnet coil and a superconducting lead end, wherein the superconducting magnet coil is installed in the low-temperature Dewar tank (1) through a support and connected with the superconducting lead end, the superconducting lead end is hermetically connected with the low-temperature Dewar tank (1) and led out of the low-temperature Dewar tank and connected with a superconducting magnet power supply output end and an energy discharge resistor in a power supply and quench protection system (9), exciting current and quench protection are input for the superconducting magnet dipolar iron (7), the superconducting lead end is connected with a monitoring system (10), the voltage of the superconducting magnet dipolar iron (7) is monitored, terminal voltage data information is uploaded to the monitoring system (10), and after the set voltage is exceeded, the monitoring system (10) displays a quench alarm state and outputs a quench protection signal to the superconducting magnet power supply.

6. The proton heavy ion medical equipment superconducting dipolar iron fast excitation testing device of claim 1, characterized in that: the temperature sensors (8) are arranged on each part of the superconducting dipolar iron (7), monitor the internal temperature of the superconducting magnet coil, are connected with the monitoring system (10), upload temperature data information to the monitoring system (10), and when the temperature exceeds the set temperature, the monitoring system (10) can display a quench alarm state and output a quench protection signal to the superconducting magnet power supply.

7. The proton heavy ion medical equipment superconducting dipolar iron fast excitation testing device of claim 1, characterized in that: the power supply and quench protection system (9) comprises a superconducting magnet power supply and an energy leakage resistor, wherein the superconducting magnet power supply is connected with a monitoring system (10), state information of the superconducting magnet power supply is uploaded, remote control of the monitoring system (10) is received, exciting current is provided for a superconducting magnet (7), a control instruction is received to complete excitation and demagnetization operation, and a superconducting magnet quench instruction sent by the monitoring system (10) is received, wherein the superconducting magnet power supply is connected with a superconducting magnet (7) lead end to provide exciting current for the superconducting magnet, the energy leakage resistor is connected with the superconducting magnet power supply and the superconducting magnet (7) lead end, energy of a coil which is rapidly discharged by the energy leakage resistor in quench protection is used for quench protection together with the superconducting magnet power supply, and the superconducting magnet coil is protected.

8. The proton heavy ion medical equipment superconducting dipolar iron fast excitation testing device of claim 1, characterized in that: the monitoring system (10) receives superconducting magnet power supply state information, vacuum degree in the Dewar tank, liquid helium liquid level in the Dewar tank, superconducting coil temperature signals and superconducting lead terminal voltage respectively, a control unit of the monitoring system (10) sets thresholds of all parameters, the monitoring system (10) displays that the system state is normal when all the parameters are within the threshold ranges, corresponding fault indication signals and current control signals are output and comprise current amplitude and current excitation time, the superconducting magnet (7) excitation test is achieved, the running states of all the parameters are displayed on a monitoring screen to form corresponding data curves, when all the parameters exceed the thresholds, corresponding fault indication signals are output, and the power supply and the quench protection system (9) can automatically execute protection operation and display the states and fault information of all parts of the system on the monitoring screen.

9. The proton heavy ion medical equipment superconducting dipolar iron fast excitation testing device of claim 1, characterized in that: the refrigerating unit comprises a refrigerator and a refrigerator compressor unit, and is equipment for transferring heat in a low-temperature Dewar flask to an environment medium to obtain cold, and the refrigerating temperature range is more than 120K; the low-temperature dewar tank provides a heat-insulating, sealed and 4.2K-resistant ultralow-temperature container for the superconducting dipolar iron.

10. The proton heavy ion medical equipment superconducting dipolar iron fast excitation testing device of claim 1, characterized in that: the external liquid nitrogen container comprises a liquid nitrogen valve and a liquid conveying pipe, and liquid nitrogen is injected into the low-temperature Dewar flask through the liquid conveying pipe, so that the temperature of the superconducting dipolar iron is rapidly reduced, and the refrigeration temperature range is usually more than 77K.

Technical Field

The invention belongs to the field of particle therapeutic instruments of medical equipment, and particularly relates to a superconducting dipolar iron fast excitation testing device of proton heavy ion medical equipment.

Background

Cancer (malignant tumor) has become one of the leading causes of death of residents of various countries in the world, and new technologies for cancer treatment in various countries are emerging. The traditional radiotherapy in cancer treatment mainly adopts X rays, gamma rays and electron beams, the physical dose distribution and the biological effect of the traditional radiotherapy damage normal cells near the tumor to different degrees, and the effective utilization rate of the dose is low; the biological effects of neutrons and negative pi particles are good, but the physical dose distribution is not good, and the damage to normal tissues is too large, so that the neutron and negative pi particles are not an ideal treatment method.

Protons are elementary tiny particles that constitute the nucleus; heavy ions are the nuclei of atoms of larger atomic weight, commonly used as carbon ions. The protons or carbon ions are accelerated to about 70% of the light velocity by the synchrotron and are extracted and injected into the human body. The energy of the rays is released little before reaching the tumor focus, and the rays can release a large amount of energy instantly after reaching the focus to form an energy release track named as a Bragg peak. The heavy ion proton therapy has the advantages that the peak value of the radiation energy is aligned to the tumor focus, the maximum irradiation dose is applied to the tumor, normal cells before the tumor are generally only subjected to the peak dose of 1/3-1/2, and the normal cells at the back of the tumor are basically not damaged. From the intrinsic physical properties of protons, it can be concluded that it is much superior to conventional radiotherapy methods. Over 10 million cancer patients have been treated with protons for the last several decades, and their superiority has been widely clinically validated.

The treatment centers which have been successfully operated at present have the defects of large volume, high manufacturing cost, long construction period, difficulty in popularization and the like. The mainstream development direction of the heavy ion proton therapeutic apparatus in the future is miniaturization and integration, so that the whole size of the therapeutic apparatus is reduced, the construction period is shortened, and the cost is reduced, thereby facilitating popularization. The superconducting dipolar iron system is the first innovative project for realizing the miniaturization and light weight of the rotating frame of the heavy ion proton treatment device by adopting a superconducting technology in China, can realize the reduction of the size and tonnage index times of the rotating frame under a high-field high-uniformity magnetic field by replacing a conventional deflection electromagnet, and has important significance for the industrialized upgrade of the treatment device.

The low-temperature superconducting magnet is a magnet which is made by utilizing the superconducting phenomenon generated by a superconducting wire at a certain low temperature, and because the superconducting wire is in a zero resistance state, the current bearing capacity is greatly improved, and further, a spiral coil in a superconducting state can generate an extremely high magnetic field. At present, no perfect device for the superconducting dipolar iron testing device can integrally realize superconducting performance testing, system real-time monitoring and superconducting device safety protection.

Disclosure of Invention

The invention aims to provide a fast excitation testing device for a superconducting dipolar iron of proton heavy ion medical equipment, which aims to solve the problem that no complete device is provided in the background technology to test the excitation of the superconducting dipolar iron.

In order to achieve the purpose, the invention provides the following technical scheme: a proton heavy ion medical equipment superconducting dipolar iron fast excitation testing device comprises: the system comprises a low-temperature dewar tank, a vacuum system, a refrigerating unit, an external liquid nitrogen container, an external liquid helium container, a liquid helium storage tank, superconducting dipolar iron, a temperature sensor, a power supply and quench protection system and a monitoring system; the low-temperature Dewar flask is connected with a vacuum system, a refrigerating unit and an external liquid nitrogen container, the liquid helium storage tank is installed in the low-temperature Dewar flask and is respectively connected with the external liquid nitrogen container and the superconducting dipolar iron, the superconducting dipolar iron is installed in the low-temperature Dewar flask and is respectively connected with a power supply, a quench protection system and a monitoring system, a plurality of temperature sensors are installed on each part of the superconducting dipolar iron and are connected with the monitoring system, and the monitoring system is respectively connected with a vacuum gauge in the vacuum system, a liquid level meter in the liquid helium storage tank, the power supply and a superconducting magnet power supply in the quench protection system.

Furthermore, the vacuum system comprises a composite molecular pump, a mechanical pump and a vacuum gauge, wherein the composite molecular pump and the mechanical pump are hermetically connected with the low-temperature Dewar tank and are devices for pumping air in the low-temperature Dewar tank to obtain vacuum, and the vacuum gauge is installed on the vacuum tube and is used for monitoring the vacuum degree in the low-temperature Dewar tank, is connected with the monitoring system and uploads vacuum degree data information to the monitoring system.

Furthermore, the external liquid helium container comprises a liquid helium valve and a liquid conveying pipe, liquid helium is injected into the liquid helium storage tank through the liquid conveying pipe, so that the temperature of the superconducting dipolar iron is rapidly reduced, and the temperature of the low-temperature dewar tank and the magnet is finally reduced to 4.2K, namely the operating temperature of the superconducting dipolar iron.

Further, liquid helium storage tank, including storage tank and level gauge, wherein the storage tank passes through support piece and installs in low temperature dewar jar, provides stable liquid helium for superconductive dipolar iron, and wherein the level gauge is installed in the storage tank, monitors the liquid level of liquid helium, is connected with monitored control system, uploads liquid level data information to monitored control system.

Furthermore, the superconducting magnet dipole comprises a superconducting magnet coil and a superconducting lead end, wherein the superconducting magnet coil is arranged in the low-temperature Dewar tank through a support and is connected with the superconducting lead end, the superconducting lead end is hermetically connected with the low-temperature Dewar tank and led out of the tank, and is connected with a superconducting magnet power supply output end and an energy discharge resistor in a power supply and quench protection system to input exciting current and quench protection for the superconducting magnet dipole, the superconducting lead end is connected with a monitoring system to monitor the voltage of the superconducting magnet dipole end, and upload terminal voltage data information to the monitoring system, and after the voltage exceeds the set voltage, the monitoring system displays a quench alarm state and outputs a quench protection signal to the superconducting magnet power supply.

Furthermore, the temperature sensors are arranged on each part of the superconducting dipolar iron, monitor the internal temperature of the superconducting magnet coil, are connected with the monitoring system, upload temperature data information to the monitoring system, and display a quench alarm state after the set temperature is exceeded, and output a quench protection signal to the superconducting magnet power supply.

Further, the power supply and quench protection system comprises a superconducting magnet power supply and an energy release resistor, wherein the superconducting magnet power supply is connected with the monitoring system, the superconducting magnet power supply state information is uploaded, the monitoring system is remotely controlled to provide exciting current for superconducting dipolar iron, a control instruction is received to complete excitation and demagnetization operation, and a superconducting magnet quench instruction sent by the monitoring system is received, wherein the superconducting magnet power supply is connected with a superconducting dipolar iron lead end to provide exciting current for the superconducting magnet, the energy release resistor is connected with the superconducting magnet power supply and the superconducting dipolar iron lead end, and the energy release resistor rapidly releases energy of a superconducting coil in quench protection, and the superconducting magnet power supply and the superconducting magnet coil are protected together to complete quench protection.

Further, the monitoring system receives status information of a superconducting magnet power supply, vacuum degree in the dewar, liquid helium level in the dewar, temperature signals of the superconducting coil and voltage of the superconducting lead wire end respectively, a control unit of the monitoring system sets thresholds of all parameters, the monitoring system displays that the system is normal in status and outputs corresponding fault indication signals and current control signals including current amplitude and current excitation time when all the parameters are within the threshold range, superconducting dipolar excitation testing is achieved, running states of all the parameters are displayed on a monitoring screen to form corresponding data curves, when all the parameters exceed the thresholds, corresponding fault indication signals are output, and the power supply and the quench protection system can automatically execute protection operation and display status and fault information of all parts of the system on the monitoring screen.

The low-temperature dewar tank provides a heat-insulating, sealed and ultralow-temperature resistant container for the superconducting dipolar iron.

The refrigerating unit comprises a refrigerator and a refrigerator compressor unit, and is equipment for transferring heat in a low-temperature Dewar flask to an environment medium to obtain cold, and the refrigerating temperature range is usually over 120K.

The external liquid nitrogen container comprises a liquid nitrogen valve and a liquid conveying pipe, and liquid nitrogen is injected into the low-temperature Dewar flask through the liquid conveying pipe, so that the temperature of the superconducting dipolar iron is rapidly reduced, and the refrigeration temperature range is usually more than 77K.

Has the advantages that:

the invention provides a perfect device for rapidly testing the excitation of the superconducting dipolar iron, and provides reliable guarantee for the application of the low-temperature superconducting technology. Compared with the traditional scheme, the application environment of the invention can monitor the state of the whole system, feed back the state to the master control operation interface in real time and perform linkage operation, protect the superconducting device and ensure the stable operation of the whole system. The test device has the advantages of scientific structure, easy realization, and good economy and safety. Through multi-wheel technical attack and field experiments, the superconducting dipolar iron can continuously carry out power-on excitation and stable operation at the low temperature of 4.2K, and the current excitation change rate is more than 20A/min.

Drawings

FIG. 1 is a schematic view of a superconducting dipolar fast excitation testing device for proton heavy ion medical equipment provided by the invention;

description of reference numerals: the system comprises a low-temperature Dewar tank 1, a vacuum system 2, a refrigerating unit 3, an external liquid nitrogen container 4, an external liquid helium container 5, a liquid helium storage tank 6, a superconductive dipolar iron 7, a temperature sensor 8, a power supply and quench protection system 9 and a monitoring system 10.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person skilled in the art based on the embodiments of the present invention belong to the protection scope of the present invention without creative efforts.

As shown in fig. 1, a schematic diagram of a superconducting dipolar iron fast excitation testing device for proton heavy ion medical equipment includes a low-temperature dewar tank (1), a vacuum system (2), a refrigerating unit (3), an external liquid nitrogen container (4), an external liquid helium container (5), a liquid helium storage tank (6), superconducting dipolar iron (7), a temperature sensor (8), a power supply and quench protection system (9), and a monitoring system (10).

The low-temperature Dewar flask (1) is connected with a vacuum system (2), a refrigerating unit (3) and an external liquid nitrogen container (4), the liquid helium storage tank (6) is installed in the low-temperature Dewar flask (1) and is respectively connected with the external liquid nitrogen container (5) and a superconducting dipolar iron (7), the superconducting dipolar iron (7) is installed in the low-temperature Dewar flask (1) and is respectively connected with a power supply, a quench protection system (9) and a monitoring system (10), the temperature sensor (8) is installed at each part of the superconducting dipolar iron (7) and is connected with the monitoring system (10), and the monitoring system (10) is respectively connected with a vacuum gauge in the vacuum system (2), a liquid level meter in the liquid helium storage tank (6), the power supply and a superconducting magnet power supply in the quench protection system (9).

The low-temperature dewar tank (1) provides a heat-insulating, sealed and ultralow-temperature-resistant container for the superconducting dipolar iron (7).

The vacuum system (2) comprises a composite molecular pump, a mechanical pump and a vacuum gauge, wherein the composite molecular pump and the mechanical pump are hermetically connected with the low-temperature Dewar tank (1), the interior of the low-temperature Dewar tank (1) is pumped to obtain vacuum, the vacuum gauge is installed on a vacuum tube and used for monitoring the vacuum degree of the interior of the low-temperature Dewar tank (1), the vacuum gauge is connected with the monitoring system (10), and vacuum degree data information is uploaded to the monitoring system (10).

The refrigerating unit (3) comprises a refrigerator and a refrigerator compressor unit, and transfers heat in the low-temperature dewar tank (1) to an environment medium to obtain cold, wherein the refrigerating temperature range is usually more than 120K.

The external liquid nitrogen container (4) comprises a liquid nitrogen valve and a liquid conveying pipe, and liquid nitrogen is injected into the low-temperature dewar tank (1) through the liquid conveying pipe, so that the temperature of the superconducting dipolar iron (7) is rapidly reduced, and the refrigeration temperature range is usually more than 77K.

The external liquid helium container (5) comprises a liquid helium valve and a liquid conveying pipe, liquid helium is filled into the liquid helium storage tank (6) through the liquid conveying pipe, so that the temperature of the superconducting dipolar iron (7) is rapidly reduced, and the temperature of the low-temperature dewar tank (1) and the temperature of the magnet are finally reduced to 4.2K, namely the running temperature of the superconducting dipolar iron (7).

The liquid helium storage tank (6) comprises a storage tank and a liquid level meter, wherein the storage tank is installed in the low-temperature dewar tank (1) through a supporting piece, stable liquid helium is provided for the superconducting dipolar iron (7), the liquid level meter is installed in the storage tank, the liquid level of the liquid helium is monitored, the liquid level helium is connected with the monitoring system (10), and liquid level data information is uploaded to the monitoring system (10).

The superconducting magnet dipolar iron (7) comprises a superconducting magnet coil and a superconducting lead end, wherein the superconducting magnet coil is installed in the low-temperature Dewar tank (1) through a support and connected with the superconducting lead end, the superconducting lead end is hermetically connected with the low-temperature Dewar tank (1) and led out of the low-temperature Dewar tank and connected with a superconducting magnet power supply output end and an energy discharge resistor in a power supply and quench protection system (9), exciting current and quench protection are input for the superconducting magnet dipolar iron (7), the superconducting lead end is connected with a monitoring system (10), the voltage of the superconducting magnet dipolar iron (7) is monitored, terminal voltage data information is uploaded to the monitoring system (10), and after the set voltage is exceeded, the monitoring system (10) displays a quench alarm state and outputs a quench protection signal to the superconducting magnet power supply.

The temperature sensors (8) are arranged on each part of the superconducting dipolar iron (7), monitor the internal temperature of the superconducting magnet coil, are connected with the monitoring system (10), upload temperature data information to the monitoring system (10), and when the temperature exceeds the set temperature, the monitoring system (10) can display a quench alarm state and output a quench protection signal to the superconducting magnet power supply.

The power supply and quench protection system (9) comprises a superconducting magnet power supply and an energy leakage resistor, wherein the superconducting magnet power supply is connected with a monitoring system (10), state information of the superconducting magnet power supply is uploaded, remote control of the monitoring system (10) is received, exciting current is provided for a superconducting magnet (7), a control instruction is received to complete excitation and demagnetization operation, and a superconducting magnet quench instruction sent by the monitoring system (10) is received, wherein the superconducting magnet power supply is connected with a superconducting magnet (7) lead end to provide exciting current for the superconducting magnet, the energy leakage resistor is connected with the superconducting magnet power supply and the superconducting magnet (7) lead end, energy of a coil which is rapidly discharged by the energy leakage resistor in quench protection is used for quench protection together with the superconducting magnet power supply, and the superconducting magnet coil is protected.

The monitoring system (10) receives superconducting magnet power supply state information, vacuum degree in the Dewar tank, liquid helium liquid level in the Dewar tank, superconducting coil temperature signals and superconducting lead terminal voltage respectively, a control unit of the monitoring system (10) sets thresholds of all parameters, the monitoring system (10) displays that the system state is normal when all the parameters are within the threshold ranges, corresponding fault indication signals and current control signals are output and comprise current amplitude and current excitation time, the superconducting magnet (7) excitation test is achieved, the running states of all the parameters are displayed on a monitoring screen to form corresponding data curves, when all the parameters exceed the thresholds, corresponding fault indication signals are output, and the power supply and the quench protection system (9) can automatically execute protection operation and display the states and fault information of all parts of the system on the monitoring screen.

The test working process of the whole device comprises the following steps: vacuumizing, cooling, testing, returning temperature and the like, and specifically comprises the following steps: firstly, a low-temperature dewar tank is vacuumized to 10 ℃ by a vacuum molecular pump through a vacuum valve^-3Pa; and slowly raising the liquid helium from the refrigerator to the maximum pressure and flow of the valve to be tested. Starting a refrigerating unit, and starting to cool the low-temperature Dewar tank; when the temperature is reduced to 120K, opening a liquid nitrogen filling valve, and conveying a liquid nitrogen storage tank to a low-temperature dewar tank; when the temperature is reduced to 77K, closing the liquid nitrogen filling valve, opening the liquid helium filling valve after liquid nitrogen in the low-temperature Dewar flask is completely drained, and conveying the liquid helium storage tank to a liquid helium storage tank in the low-temperature Dewar flask to reduce the temperature to 4.2K; each part of the monitoring device of the monitoring system meets the testing requirement, the monitoring system sends current and current change rate signals to the superconducting magnet power supply, the superconducting magnet power supply outputs exciting current to the superconducting magnet and feeds operation information back to the monitoring system, and the whole device operates normally to realize the excitation test of the superconducting magnet; and after the test is finished, closing the infusion valve and the refrigerating unit, and opening the bypass valve to naturally return the temperature of the whole low-temperature Dewar tank.

Although illustrative embodiments of the present invention have been described above to facilitate the understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the embodiments, but various changes may be apparent to those skilled in the art, and it is intended that all inventive concepts utilizing the inventive concepts set forth herein be protected without departing from the spirit and scope of the present invention as defined and limited by the appended claims.