阅读说明：本技术 一种用于回旋加速器的主径向探针信号标定系统与方法 (main radial probe signal calibration system and method for cyclotron ) 是由 宋云涛 胡乐星 丁开忠 余良清 吴昱城 姚凯 于 2019-10-28 设计创作，主要内容包括：本发明公开了一种用于回旋加速器的主径向探针信号标定系统与方法,包括：主径向探针本体与主径向探针控制柜、射频单元本体与射频单元控制柜、主控计算机；其中,主径向探针单元可将探针传送到回旋加速器的不同半径处,然后利用探针阻挡束流,形成电流信号,再利用主径向探针控制柜对电流信号进行测量；其中,射频单元会产生高频电磁场,从而对束流流强的测量造成干扰；其中,主控计算机用于实现主径向探针单元与射频单元的控制,并运行标定程序,主控计算机提供用户界面、数据处理和保存等功能。(The invention discloses main radial probe signal calibration system and method for a cyclotron, which comprises a main radial probe body and a main radial probe control cabinet, a radio frequency unit body and radio frequency unit control cabinet and a main control computer, wherein the main radial probe unit can transmit probes to different radiuses of the cyclotron, then the probes block beam current to form current signals, and the main radial probe control cabinet is used for measuring the current signals, wherein the radio frequency unit can generate a high-frequency electromagnetic field to interfere the measurement of beam current intensity, the main control computer is used for realizing the control of the main radial probe unit and the radio frequency unit and operating a calibration program, and the main control computer provides functions of a user interface, data processing, storage and the like.)

1, A main radial probe signal calibration system for a cyclotron, which is characterized by comprising a main radial probe unit, a radio frequency unit and a main control computer;

wherein the main radial probe unit comprises a main radial probe body and a main radial probe control cabinet;

the main radial probe body consists of a probe, a transmission mechanism and a supporting mechanism; the transmission mechanism consists of a curve guide rail, a transmission rod, an electric cylinder and a servo motor and is used for transmitting the probe to the position from the outer side of the central area of the cyclotron to the maximum radius of the cyclotron; the support structure consists of a support base, a collimation adjusting mechanism and a workbench and is used for supporting and collimating the transmission mechanism; the probe is used for blocking the beam current and forming current; the main radial probe control cabinet is used for measuring the current formed by the probe; the main radial probe control cabinet is used for realizing the motion control and positioning of the main radial probe body;

the radio frequency unit is used for generating a high-frequency electromagnetic field while accelerating the beam current, so that interference is generated on the measurement of the beam current intensity;

the main control computer is used for realizing the control and monitoring of the main radial probe unit and the radio frequency unit and calibrating, and the calibrating steps are as follows:

, taking the actual power of the radio frequency unit and the real-time position of the probe as independent variables, and taking the current background noise as a dependent variable, and performing two-dimensional surface fitting;

step two: when beam current intensity is measured, inputting the current position of the probe and the actual power of the radio frequency unit into a two-dimensional fitting curved surface, and calculating background noise;

step three: and then subtracting the background noise from the beam current intensity measured value to obtain a calibrated beam current intensity value.

2. The system for calibrating signal of main radial probe for cyclotron of claim 1, wherein, the RF unit is composed of RF unit body and RF unit control cabinet;

the radio frequency unit control cabinet is used for realizing the control and monitoring of the radio frequency unit body; the radio frequency unit control cabinet is used for monitoring, processing and storing key parameters of the radio frequency unit body.

3. The system for calibrating a main radial probe signal for a cyclotron of claim 2, wherein the key parameters of the radio frequency unit include incident power and reflected power.

4. The system for calibration of main radial probe signal for cyclotron of claim 1, wherein the host computer is further used to provide user interface, data processing and saving functions.

5. The system for calibrating a signal of a main radial probe of a cyclotron of claim 1, wherein the actual power of the radio frequency unit is the difference between the incident power and the reflected power.

6, method for calibrating the signal of a main radial probe for a cyclotron, characterized in that it comprises the following steps:

step , connecting the main radial probe unit, the radio frequency unit and the main control computer;

step two: moving the probe to a minimum radius of the cyclotron;

step three, adjusting the incident power of the radio frequency unit according to the step length determined by ;

step four: synchronously recording the position of the probe, the real-time power of the radio frequency unit and background noise;

step five, changing the position of the probe according to the step length determined by , and repeating the step three and the step four until the probe moves to the maximum radius of the cyclotron;

step six: according to the values of the background noise obtained by the measurement in the third step to the fifth step, the power of the radio frequency unit and the position of the probe are used as independent variables, and the background noise is used as a dependent variable to carry out two-dimensional surface fitting;

step seven: through two-dimensional surface fitting, the background noise of the probe at any position and under any radio frequency unit power can be obtained;

step eight: when the beam current intensity of the cyclotron is measured, the position of the probe and the power of the radio frequency unit are measured at the same time, the value of background noise is obtained through fitting a curved surface, and finally the value of the background noise is subtracted from the actual measured value of the beam current intensity, so that the calibration value of the beam current intensity can be obtained.

Technical Field

The invention relates to signal calibration systems and methods, in particular to main radial probe signal calibration systems and methods for a cyclotron.

Background

The beam current intensity is an important performance parameter of the cyclotron. The accurate measurement of the beam current intensity has important significance for debugging of the performance of the cyclotron, optimization of key parameters, detection of running states and the like.

For the measurement of the beam current intensity of the cyclotron, the noise sources mainly include: high-frequency electromagnetic field interference introduced by the radio frequency unit, environmental noise introduced by a transmission line, power supply system interference, temperature fluctuation, noise introduced by vibration and the like. The interference of the high-frequency electromagnetic field introduced by the radio frequency unit is far greater than the influence of other interference, and is difficult to eliminate by measures such as grounding, shielding and the like. It can be found through experiments that the electromagnetic field interference introduced by the radio frequency unit is mainly related to the actual power of the radio frequency unit and the position of the probe. Therefore, in the calibration experiment, the actual power of the radio frequency unit and the position of the probe are used as independent variables, and the measured background noise is used as a dependent variable to perform fitting.

, the measurement precision of the beam current intensity of the cyclotron is required to reach the level of nanoampere or even sub-nanoampere, so the calibration of the main radial probe unit is very important.

Disclosure of Invention

The purpose of the invention can be realized by the following technical scheme:

the method is suitable for calibrating the beam current intensity obtained by measuring the main radial probe unit of the cyclotron so as to improve the measurement precision of the beam current intensity.

main radial probe signal calibration system for cyclotron, including main radial probe unit, radio frequency unit and main control computer;

wherein the main radial probe unit comprises a main radial probe body and a main radial probe control cabinet;

the main radial probe body consists of a probe, a transmission mechanism and a supporting mechanism; the transmission mechanism consists of a curve guide rail, a transmission rod, an electric cylinder and a servo motor and is used for transmitting the probe to the position from the outer side of the central area of the cyclotron to the maximum radius of the cyclotron; the support structure consists of a support base, a collimation adjusting mechanism and a workbench and is used for supporting and collimating the transmission mechanism; the probe is used for blocking the beam current and forming current; the main radial probe control cabinet is used for measuring the current formed by the probe; the main radial probe control cabinet is used for realizing the motion control and positioning of the main radial probe body;

the radio frequency unit is used for generating a high-frequency electromagnetic field while accelerating the beam current, so that interference is generated on the measurement of the beam current intensity;

the main control computer is used for realizing the control and monitoring of the main radial probe unit and the radio frequency unit, carrying out calibration analysis and calibrating the beam current intensity measurement result so as to improve the measurement precision of the beam current intensity; the calibration analysis specifically comprises the following steps:

, taking the actual power of the radio frequency unit and the real-time position of the probe as independent variables, and taking the current background noise as a dependent variable, and performing two-dimensional surface fitting;

step two: when beam current intensity is measured, inputting the current position of the probe and the actual power of the radio frequency unit into a two-dimensional fitting curved surface, and calculating background noise;

step three: and then subtracting the background noise from the beam current intensity measured value to obtain a calibrated beam current intensity value.

, the radio frequency unit is composed of a radio frequency unit body and a radio frequency unit control cabinet;

the radio frequency unit control cabinet is used for monitoring, processing and storing key parameters of the radio frequency unit body.

Further , the key parameters of the RF unit include incident power and reflected power.

Further , the host computer is also used to provide user interface, data processing, and storage functions.

Further , the actual power of the RF unit is the difference between the incident power and the reflected power.

A method for calibrating a signal of a main radial probe of a cyclotron, the method comprising the steps of:

step , connecting the main radial probe unit, the radio frequency unit and the main control computer;

step two: moving the probe to a minimum radius of the cyclotron;

step three, adjusting the incident power of the radio frequency unit according to the step length determined by ;

step four: synchronously recording the position of the probe, the real-time power of the radio frequency unit and background noise;

step five, changing the position of the probe according to the step length determined by , and repeating the step three and the step four until the probe moves to the maximum radius of the cyclotron;

step six: according to the value of the background noise obtained by the measurement in the third step to the fifth step, the power of the radio frequency unit and the position of the probe are used as independent variables, and the background noise is used as a dependent variable, so that two-dimensional surface fitting is carried out;

step seven: through two-dimensional surface fitting, the background noise of the probe at any position and under any radio frequency unit power can be obtained;

step eight: when the beam current intensity of the cyclotron is measured, the position of the probe and the power of the radio frequency unit are measured at the same time, the value of background noise is obtained through fitting a curved surface, and finally the value of the background noise is subtracted from the actual measured value of the beam current intensity, so that the calibration value of the beam current intensity can be obtained.

The invention has the beneficial effects that:

1. the noise reduction algorithm provided by the invention has the advantages that: the invention not only considers the actual power of the radio frequency unit, but also considers the real-time position of the probe, thereby obviously improving the calibration precision.

2. Another important advantages of the invention are that the invention can realize the real-time high-precision calibration of the beam current intensity because the invention carries out the comprehensive measurement and fitting to the background noise of different powers of the radio frequency unit and different positions of the probe.

3. The invention can realize the synchronization of beam current intensity measurement, radio frequency unit power monitoring and probe positioning in millisecond level, which has important significance for improving the calibration precision of beam current intensity.

Drawings

The invention is further described in conjunction with the following figures.

FIG. 1 is a schematic diagram of a primary radial probe signal calibration system;

figure 2 is a top plan view of the cyclotron;

FIG. 3 is a software system user interface for the host computer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only partial embodiments of of the present invention, rather than all embodiments.

As shown in fig. 1-3, main radial probe signal calibration systems for cyclotrons comprise a main radial probe unit, a radio frequency unit and a main control computer;

wherein the main radial probe unit comprises a main radial probe body and a main radial probe control cabinet;

the main radial probe body consists of a probe, a transmission mechanism and a supporting mechanism; the transmission mechanism consists of a curve guide rail, a transmission rod, an electric cylinder and a servo motor and is used for transmitting the probe to the position of the maximum radius of the cyclotron from the outer side of the central area of the cyclotron; the support structure consists of a support base, a collimation adjusting mechanism and a workbench and is used for supporting and collimating the transmission mechanism; the probe is used for blocking the beam current and forming current; the main radial probe control cabinet is used for measuring the current formed by the probe; the main radial probe control cabinet is used for realizing the motion control and positioning of the main radial probe body;

the radio frequency unit is used for generating a high-frequency electromagnetic field while accelerating the beam current, so that interference is generated on the measurement of the beam current intensity;

the main control computer is used for realizing the control and monitoring of the main radial probe unit and the radio frequency unit, carrying out calibration analysis and calibrating the beam current intensity measurement result so as to improve the measurement precision of the beam current intensity; the calibration analysis specifically comprises the following steps:

, taking the actual power of the radio frequency unit and the real-time position of the probe as independent variables, and taking the current background noise as a dependent variable, and performing two-dimensional surface fitting;

step two: when beam current intensity is measured, inputting the current position of the probe and the actual power of the radio frequency unit into a two-dimensional fitting curved surface, and calculating background noise;

step three: and then subtracting the background noise from the beam current intensity measured value to obtain a calibrated beam current intensity value.

The radio frequency unit consists of a radio frequency unit body and a radio frequency unit control cabinet;

the radio frequency unit control cabinet is used for realizing the control and monitoring of the radio frequency unit body; the radio frequency unit control cabinet is used for monitoring, processing and storing key parameters of the radio frequency unit body.

The key parameters of the radio frequency unit include incident power and reflected power.

Further , the host computer is also used to provide user interface, data processing, and storage functions.

Wherein, the actual power of the RF unit is the difference between the incident power and the reflected power.

A method for calibrating a signal of a main radial probe of a cyclotron, the method comprising the steps of:

step , connecting the main radial probe unit, the radio frequency unit and the main control computer;

step two: moving the probe to a minimum radius of the cyclotron;

step three, adjusting the incident power of the radio frequency unit according to the step length determined by ;

step four: synchronously recording the position of the probe, the real-time power of the radio frequency unit and background noise;

step five, changing the position of the probe according to the step length determined by , and repeating the step three and the step four until the probe moves to the maximum radius of the cyclotron;

step six: according to the value of the background noise obtained by the measurement in the third step to the fifth step, the power of the radio frequency unit and the position of the probe are used as independent variables, and the background noise is used as a dependent variable, so that two-dimensional surface fitting is carried out;

step seven: through two-dimensional surface fitting, the background noise of the probe at any position and under any radio frequency unit power can be obtained;

step eight: when the beam current intensity of the cyclotron is measured, the position of the probe and the power of the radio frequency unit are measured at the same time, the value of background noise is obtained through fitting a curved surface, and finally the value of the background noise is subtracted from the actual measured value of the beam current intensity, so that the calibration value of the beam current intensity can be obtained.

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.