阅读说明：本技术 一种回旋加速器扇形二极铁磁场测量系统及测量方法 (Measuring system and measuring method for sector diode ferromagnetic field of cyclotron ) 是由 韩曼芬 宋云涛 郑金星 沈俊松 朱小亮 刘海洋 于 2020-06-18 设计创作，主要内容包括：本发明公开了一种回旋加速器扇形二极铁磁场测量系统,该系统主要包括三维测量装置,该装置设有运动位移单元,探头单元,控制单元及数据采集单元,可接收控制指令实现在磁场区域进行空间运动,测量并记录该点磁场强度；电源装置,为扇形二极铁提供不同的电流以产生相应的磁场强度；去离子水循环装置,用于扇形二极铁线圈及电源装置的降温处理,保证测量系统正常运行。本发明还公开了一种采用上述测量系统的磁场测量方法,用于扇形二极铁励磁、积分场均匀性及横向场均匀性相关性能参数的测量。本发明能够获得更加精确且全面的磁场强度分布,验证扇形二极铁磁场分布特性,在加速器领域的应用十分广泛。(The invention discloses a measuring system of a sector dipolar ferromagnetic field of a cyclotron, which mainly comprises a three-dimensional measuring device, wherein the measuring device is provided with a motion displacement unit, a probe unit, a control unit and a data acquisition unit, can receive a control command to realize space motion in a magnetic field area, and measure and record the magnetic field intensity of the point; the power supply device is used for providing different currents for the fan-shaped dipolar iron to generate corresponding magnetic field intensity; and the deionized water circulating device is used for cooling the fan-shaped dipolar iron coil and the power supply device, so that the normal operation of the measuring system is ensured. The invention also discloses a magnetic field measurement method adopting the measurement system, which is used for measuring the performance parameters related to the excitation of the fan-shaped dipolar iron, the uniformity of the integral field and the uniformity of the transverse field. The invention can obtain more accurate and comprehensive magnetic field intensity distribution, verify the distribution characteristics of the fan-shaped dipolar ferromagnetic field and has wide application in the field of accelerators.)

1. A measuring system for a sector diode ferromagnetic field of a cyclotron is characterized in that: comprises a three-dimensional measuring device, a deionized water circulating device and a power supply device;

the three-dimensional measuring device comprises a motion displacement unit, a probe unit, a control unit and a data acquisition unit, wherein the power supply device is connected with the fan-shaped dipolar coil and provides different current intensities to generate corresponding magnetic field intensity; the deionized water circulating device is connected with the fan-shaped dipolar iron and an internal cooling water pipeline of the power supply device and used for reducing the temperature rise of the coil inside the magnet and the power supply and ensuring that the measuring system is in a normal working state.

2. The cyclotron fan diode ferromagnetic field measurement system of claim 1, wherein: the motion displacement unit can realize X, Y, Z-direction simultaneous motion, scanning tasks of different angles and different shapes in a magnetic field region are realized, and a high-flatness marble base is arranged at the bottom of the motion displacement unit.

3. The cyclotron fan diode ferromagnetic field measurement system of claim 1, wherein: the probe unit has linear characteristics and a temperature compensation technology, and reduces the influence on the measurement precision caused by temperature change and stray fields; the device is fixedly arranged on the motion displacement unit through a clamp, measures Hall voltage in real time, converts the Hall voltage into magnetic field intensity and uploads the magnetic field intensity to the data acquisition unit.

4. The cyclotron fan diode ferromagnetic field measurement system of claim 1, wherein: the control unit is used for closed-loop control of detection, comparison and feedback compensation of the motion displacement unit.

5. A method of measuring the cyclotron sector diode ferromagnetic field according to claims 1 to 4, comprising the steps of:

the method comprises the following steps: the fan-shaped dipolar iron and a cooling water pipeline of the power supply device are respectively connected through a water way joint, the deionized water circulating device is opened, proper water pressure is selected, and water cooling circulation of the power supply and the magnet is established;

step two: connecting the fan-shaped dipolar iron and a power supply connector, starting a power supply device for preheating, adjusting the current to a required value and waiting for the current waveform to be stable;

step three: starting the three-dimensional measuring device, the initialized motion displacement unit and the data acquisition unit, keeping the probe coordinate system in the same direction with the magnet coordinate system, and adjusting the position of the probe to ensure that the probe is completely vertical to the direction of the fan-shaped dipolar ferromagnetic field on the xy plane, and the height in the z direction is consistent with the height of the plane in the air gap of the fan-shaped dipolar iron;

step four: the mechanical boundary center of the end face of the fan-shaped dipolar iron is set as a point A, the intersection point of the center track of the fan-shaped dipolar iron and the tangent is set as a point B of the physical boundary, the point B is set as a scanning starting point, the scanning step length and the scanning track are set in a control system, and the scanning track can be a straight line segment, an arc segment or a superposition component according to the actual measurement requirement, so that the measurement of the uniformity of the dipolar iron integral field and the uniformity of the transverse field is realized;

step five: when the sector dipolar iron excitation measurement is carried out, the probe is moved to a point P0 at the center of a plane in the air gap of the sector dipolar iron, the step length of the rising and falling of the current is set, and the magnetic field intensity of a point P0 under different currents is measured and recorded.

6. The method of claim 5, wherein the integrated field uniformity and the transverse field uniformity of the fan-shaped dipole are measured in the fourth step according to the following method:

k1: the integrated field uniformity measuring tracks are tracks S1, S2, S3 and S4 … … Sn which are different in the middle plane of the fan-shaped dipolar iron air gap and parallel to each other, each track is composed of a straight line segment and an arc segment, and integration is carried out according to the magnetic field intensity of each point on each track to obtain an integrated field on each track;

k2: the measuring track of the transverse field uniformity is calculated by the magnetic field intensity at different positions P0, P1, P2, P3, P4, … … and Pn on the y coordinate axis of the plane in the air gap of the fan-shaped dipolar iron.

7. The system and method for measuring the magnetic field of a circular accelerator fan-shaped diode according to claims 1-6, wherein the system and method are applicable to fields including but not limited to the uniform magnetic field generated by the fan-shaped diode.

Technical Field

The invention belongs to the technical field of magnetic field measurement, and particularly relates to a measuring system and a measuring method for a sector diode ferromagnetic field of a cyclotron.

Background

With the breakthrough development of key core technologies such as nuclear physics, magnetic confinement and the like, the cyclotron is widely applied to the fields of industry, physics and biology as a fusion device of high-tech engineering such as nucleus, magnetism and the like. The cyclotron device mainly comprises an accelerator body and a transmission line, and in order to realize safe and reliable directional transmission of high-energy particles, the fan-shaped dipolar iron provides a deflection magnetic field with high uniformity and high precision for the particles, and is an important component of the transmission line. Therefore, the magnetic field distribution characteristics of the fan-shaped dipolar iron directly affect the transmission efficiency of the cyclotron device, and the quality of the magnet must be comprehensively and accurately measured.

In the existing magnetic field measurement technology, different measurement modes are adopted in each accelerator laboratory based on the type of a magnet and the test requirement, the measurement modes mainly comprise harmonic measurement and integral measurement, the measurement speed and the measurement precision are high, but the problems of complex operation, poor anti-interference capability and the like exist, and the coil processing technology has high requirement and long period. Aiming at the problems in the prior art, the invention provides a measuring system and a measuring method which are high in measuring precision, automatic in measuring and short in period.

Disclosure of Invention

The invention aims to provide a measuring system and a measuring method for a fan-shaped dipolar ferromagnetic field of a cyclotron, which solve the problems that the measuring method in the prior art is complex and is not beneficial to the miniaturization and automatic measurement of the device by opening a deionized water circulating device, selecting proper water pressure, starting a power supply device, adjusting current, starting a three-dimensional measuring device, initializing a motion displacement unit and a data acquisition unit, adjusting the position of a probe, setting scanning step length and scanning track in a control system, carrying out fan-shaped dipolar excitation measurement, and measuring and recording the magnetic field intensity of P0 points under different currents, realize the measurement of the homogeneity of an dipolar integrating field and the homogeneity of a transverse field, have the advantages of simple operation, high precision, miniaturization integration, measurement automation and the like, and are widely applied in the field of the cyclotron.

The technical problem to be solved by the invention is;

the purpose of the invention can be realized by the following technical scheme: a measuring system of a sector diode ferromagnetic field of a cyclotron comprises a three-dimensional measuring device, a deionized water circulating device and a power supply device;

the three-dimensional measuring device comprises a motion displacement unit, a probe unit, a control unit and a data acquisition unit, and is used for finishing the measurement and recording work of the space motion of the probe and the magnetic field intensity; the power supply device is connected with the fan-shaped dipolar iron coil and generates corresponding magnetic field intensity by providing different current intensities; the deionized water circulating device is connected with the fan-shaped dipolar iron and an internal cooling water pipeline of the power supply device and used for reducing the temperature rise of the coil inside the magnet and the power supply and ensuring that the measuring system is in a normal working state.

As a further improvement of the invention: the motion displacement unit can realize X, Y, Z orientation simultaneous movement, realizes the scanning task of different angles, different shapes in the magnetic field region, motion displacement unit bottom is equipped with high plane degree marble base, avoids because of the displacement error that environmental factor such as humiture or ground vibrations caused.

As a further improvement of the invention: the probe unit has linear characteristics and a temperature compensation technology, and reduces the influence on the measurement precision caused by temperature change and stray fields; the device is fixedly arranged on the motion displacement unit through a clamp, measures Hall voltage in real time, converts the Hall voltage into magnetic field intensity and uploads the magnetic field intensity to the data acquisition unit.

As a further improvement of the invention: the control unit has closed-loop control functions of detection, comparison and feedback compensation of the motion displacement unit.

A method for measuring a ferromagnetic field of a sector diode of a cyclotron, the method comprising the steps of:

the method comprises the following steps: the fan-shaped dipolar iron and a cooling water pipeline of the power supply device are respectively connected through a water way joint, the deionized water circulating device is opened, proper water pressure is selected, and water cooling circulation of the power supply and the magnet is established;

step two: connecting the fan-shaped dipolar iron and a power supply connector, starting a power supply device for preheating, adjusting the current to a required value and waiting for the current waveform to be stable;

step three: starting the three-dimensional measuring device, the initialized motion displacement unit and the data acquisition unit, keeping the probe coordinate system in the same direction with the magnet coordinate system, and adjusting the position of the probe to ensure that the probe is completely vertical to the direction of the fan-shaped dipolar ferromagnetic field on the xy plane, and the height in the z direction is consistent with the height of the plane in the air gap of the fan-shaped dipolar iron;

step four: the center of the mechanical boundary of the end face of the fan-shaped dipolar iron is set as point A, and the intersection point of the central track of the fan-shaped dipolar iron and the tangent is set as point B of the physical boundary. Setting the point B as a scanning starting point; setting scanning step length and scanning track in a control system, wherein the scanning track can be a straight line segment, an arc segment or a superposition component according to actual measurement requirements, so as to realize the measurement of the uniformity of the dipolar iron integrating field and the uniformity of the transverse field;

step five: when the sector dipolar iron excitation measurement is carried out, the probe is moved to a point P0 at the center of a plane in the air gap of the sector dipolar iron, the step length of the rising and falling of the current is set, and the magnetic field intensity of a point P0 under different currents is measured and recorded.

As a further improvement of the invention: in the fourth step, the uniformity of the fan-shaped dipolar iron integral field and the uniformity of the transverse field are measured according to the following methods:

k1: the integrated field uniformity measuring tracks are tracks S1, S2, S3, S4, … … and Sn which are different in the middle plane of the fan-shaped dipolar iron air gap and parallel to each other, and are composed of straight line segments and circular arc segments, and integration is carried out according to the magnetic field intensity of each point on the tracks to obtain an integrated field on each track;

k2: the measuring track of the transverse field uniformity is calculated by the magnetic field intensity at different positions P0, P1, P2, P3, P4, … … and Pn on the y coordinate axis of the plane in the air gap of the fan-shaped dipolar iron.

As a further improvement of the invention: the measuring system and the measuring method are applicable to the range including but not limited to the uniform magnetic field generated by the fan-shaped dipolar iron.

The invention has the beneficial effects that:

the water cooling circulation of the power supply and the magnet is established by opening the deionized water circulating device and selecting proper water pressure; starting a power supply device for preheating, adjusting the current to a required value and waiting for the current waveform to be stable; starting the three-dimensional measuring device, the initialized motion displacement unit and the data acquisition unit, and adjusting the position of the probe to ensure that the probe is completely vertical to the direction of the fan-shaped dipolar ferromagnetic field on the xy plane, and the height of the probe in the z direction is consistent with the height of the plane in the air gap of the fan-shaped dipolar iron; the invention provides a fan-shaped dipolar iron magnetic field measuring system and a measuring method, which can realize the measurement of dipolar iron integral field uniformity and transverse field uniformity, have the advantages of simple operation, high precision, miniaturized integration, measurement automation and the like, and have wide application in the field of accelerators.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a flow chart of a method for measuring a sector dipolar ferromagnetic field according to the present invention;

FIG. 2 is a schematic structural diagram of a sector dipolar ferromagnetic field measurement system constructed according to the present invention;

FIG. 3 is a schematic diagram of points in a midplane of a fan-shaped dipolar ferromagnetic field measurement method constructed in accordance with the present invention;

fig. 4 is a schematic diagram of scanning tracks in the fan-shaped two-pole ferromagnetic field measurement method constructed by the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the present invention is a system for measuring a sector diode ferromagnetic field of a cyclotron, which is characterized in that: comprises a three-dimensional measuring device, a deionized water circulating device and a power supply device.

The three-dimensional measuring device comprises a motion displacement unit, a probe unit, a control unit and a data acquisition unit, and is used for finishing the measurement and recording work of the space motion of the probe and the magnetic field intensity; the power supply device is connected with the fan-shaped dipolar iron coil and generates corresponding magnetic field intensity by providing different current intensities; the deionized water circulating device is connected with the fan-shaped dipolar iron and an internal cooling water pipeline of the power supply device and used for reducing the temperature rise of the coil inside the magnet and the power supply and ensuring that the measuring system is in a normal working state.

The motion displacement unit can realize X, Y, Z orientation simultaneous movement, realizes the scanning task of different angles, different shapes in the magnetic field region, the motion displacement unit bottom is installed on high plane degree marble base, avoids the displacement error because of environmental factors such as humiture or ground vibrations cause.

The probe unit has linear characteristics and a temperature compensation technology, and reduces the influence on the measurement precision caused by temperature change and stray fields; the device is fixedly arranged on the motion displacement unit through a clamp, measures Hall voltage in real time, converts the Hall voltage into magnetic field intensity and uploads the magnetic field intensity to the data acquisition unit.

The control unit has closed-loop control functions of detection, comparison and feedback compensation of the motion displacement unit.

As shown in fig. 2 and fig. 3, a method for measuring a ferromagnetic field of a sector diode of a cyclotron includes the following steps:

the method comprises the following steps: the fan-shaped dipolar iron and a cooling water pipeline of the power supply device are respectively connected through a water way joint, the deionized water circulating device is opened, proper water pressure is selected, and water cooling circulation of the power supply and the magnet is established;

step two: connecting the fan-shaped dipolar iron and a power supply connector, starting a power supply device for preheating, adjusting the current to a required value and waiting for the current waveform to be stable;

step three: starting the three-dimensional measuring device, the initial motion displacement unit and the data acquisition unit, keeping the probe coordinate system in the same direction with the magnet coordinate system, and adjusting the position of the probe to ensure that the probe is completely vertical to the direction of the dipolar ferromagnetic field on the xy plane and the height in the z direction is consistent with the height of the plane in the dipolar iron air gap;

step four: the center of the mechanical boundary of the end face of the fan-shaped dipolar iron is set as point A, and the intersection point of the central track of the fan-shaped dipolar iron and the tangent is set as point B of the physical boundary. Setting the point B as a scanning starting point; setting scanning step length and scanning track in a control system, wherein the scanning track can be a straight line segment, an arc segment or a superposition component according to actual measurement requirements, so as to realize the measurement of the uniformity of the dipolar iron integrating field and the uniformity of the transverse field;

step five: when the sector dipolar iron excitation measurement is carried out, the probe is moved to a point P0 at the center of a plane in an dipolar iron air gap, the current rising and falling step length is set, and the magnetic field intensity of a point P0 under different currents is measured and recorded.

As shown in fig. 4, in step four, the fan-shaped dipole integrated field uniformity and the lateral field uniformity are preferably measured according to the following methods:

k1: the integrated field uniformity measuring tracks are tracks S1, S2, S3, S4, … … and Sn which are different in the middle plane of the fan-shaped dipolar iron air gap and parallel to each other, and are composed of straight line segments and circular arc segments, and integration is carried out according to the magnetic field intensity of each point on the tracks to obtain an integrated field on each track;

k2: the measuring track of the transverse field uniformity is calculated by the magnetic field intensity at different positions P0, P1, P2, P3, P4, … … and Pn on the y coordinate axis of the plane in the air gap of the fan-shaped dipolar iron.

Further, the measuring system and the measuring method are applicable to the range including but not limited to the uniform magnetic field generated by the fan-shaped dipolar iron.

When the water-cooling water circulation device works, the fan-shaped dipolar iron and a cooling water pipeline of a power supply device are respectively connected through the water way joint, the deionized water circulation device is opened, proper water pressure is selected, and water-cooling circulation of the power supply and the magnet is established; connecting the fan-shaped dipolar iron and a power supply connector, starting a power supply device for preheating, adjusting the current to a required value and waiting for the current waveform to be stable; starting the three-dimensional measuring device, the initialized motion displacement unit and the data acquisition unit, keeping the probe coordinate system in the same direction with the magnet coordinate system, and adjusting the position of the probe to ensure that the probe is completely vertical to the direction of the fan-shaped dipolar ferromagnetic field on the xy plane, and the height in the z direction is consistent with the height of the plane in the air gap of the fan-shaped dipolar iron; the mechanical boundary center of the end face of the fan-shaped dipolar iron is set as a point A, the intersection point of the center track of the fan-shaped dipolar iron and the tangent is set as a point B of the physical boundary, the point B is set as a scanning starting point, the scanning step length and the scanning track are set in a control system, and the scanning track can be a straight line segment, an arc segment or a superposition component according to the actual measurement requirement, so that the measurement of the uniformity of the dipolar iron integral field and the uniformity of the transverse field is realized; when the sector dipolar iron excitation measurement is carried out, the probe is moved to a point P0 at the center of a plane in the air gap of the sector dipolar iron, the step length of the rising and falling of the current is set, and the magnetic field intensity of a point P0 under different currents is measured and recorded.

The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.