CN105467423A - Accelerator beam position diagnosis system and accelerator beam position diagnosis method based on eight-octant probe distribution - Google Patents
Accelerator beam position diagnosis system and accelerator beam position diagnosis method based on eight-octant probe distribution Download PDFInfo
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- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
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Abstract
The invention relates to an accelerator beam position diagnosis system and an accelerator beam position diagnosis method based on eight-octant probe distribution. The system comprises a three-dimensional eight-octant interception-type probe distribution mechanism, a multi-range passive filter signal conditioning module, a beam signal amplifying module, a beam signal photoelectric isolation module, a beam signal acquisition module, a beam position automatic diagnosis module and an intelligent configuration decision supporting system. When a particle accelerator operates, the eight-octant probes distributed on the wall of a vacuum pipeline collect beam signals coupled by charges incident to the sensitive ends by the beam, the position automatic diagnosis module in the controller calculates the position information of the beam in real time according to eight-octant voltage signals acquired by the signal acquisition module, the operation result is transmitted to the intelligent configuration decision supporting system of an operation station, a three-dimensional animation is adopted to prompt the operator whether the beam biases and the beam adjustment strategy. Through the intelligent and visual diagnosis strategy, the accuracy, the real-time performance and the usability of the accelerator beam position measurement system are effectively improved.
Description
Technical field
The invention belongs to high energy nuclear physics device particle accelerator survey technical field, be specifically related to a kind of accelerator beam position diagnostic system based on Eight Diagrams limit probe distribution and method.
Background technology
The domestic and international scientific research personnel that develops into of particle accelerator provides new opportunity in the research in high-energy physics field.Along with particle accelerator technology application depth development, scientific research personnel to the operational factor of line, as the parameters such as beam intensity, beam position, beam emittance, beam luminosity are more and more paid attention to.Particle accelerator beam measurement system is that accelerator is debugged and ingredient indispensable in stable operation, bundle examining system is as " eyes " of accelerator, can monitor the various parameters of line, for the development of accelerator, operation and even its performance of upgrading provide important foundation.Line lateral attitude and lengthwise position in accelerator vacuum pipe are the important information bases of research beaminstability, therefore as one of the important diagnostic means of accelerator line, the research of Beam position monitor system is subject to the attention of domestic and international each big experiment room.Traditional mode utilizing probe to monitor beam position is four quadrant layout probes in planimetric coordinates, four probes vertical distribution between two, the method in four orientation, the single cross section of this monitoring line is easily because the sensitivity of probe acute end or electronics are interfered and produce erroneous judgement.Patent " band beam transport network " (CN201220297254.0), measures the electromagnetic field of line by being arranged on strip electrodes in vacuum pipe, utilize electromagnetic field by the position data of modulated information detection line; Patent " a kind of method measuring particle accelerator beam position " (CN201410080631.9), by the electrode signal composition matrix of comprehensive multiple electrode probe, utilize principal component analysis (PCA) to process these electrode signals simultaneously, thus the positional information of detection beam current signal; Patent " neutron beam current position detection instrument " (CN201310495700.8), middle sub-image is changed into the scintillation screen of visible image, be provided with the catoptron for visible ray being refracted to camera on rear side of scintillation screen, the light of catoptron refraction converges to CCD camera through camera lens and comes detected neutron beam position; Patent " a kind of beam position based on totally digitilized technology and phase place are surveyed " (CN201410440504.5), digital signal processing module is concentrated in monolithic FPGA, simplify system architecture, simultaneously suitable sampling rate, make the orthogonal sequence directly obtaining input signal after ADC sampling, obtain accelerator beam position and phase place further; Patent " a kind of ultralow temperature beam position with almag O-ring seal " (CN201420862430.X), after being equipped with ultravacuum almag O-ring seal and supporting flange, can monitor the position of line under ultralow temperature; Patent " carrier wave suppresses radio-frequency front-end and method, Beam position monitor system and method " (CN201410854329.4), by the first passage popped one's head on diagonal line in beam position and the signal phase that second channel exports and amplitude adjusted for consistent, thus can light source normally for light run time effective suppressed carrier signal, echo signal to be detected.
Above-mentioned 6 patents, what all do not possess described in this patent is a kind of based on Eight Diagrams limit accelerator beam position diagnostic system of probe distribution and the feature of method.The present invention obtains line information by Eight Diagrams limit probe structure, and carries out bundle bit decisions by intelligent diagnostics strategy, improves the robustness of beam position diagnostic system.
Summary of the invention
The technical problem to be solved in the present invention is: for this kind of high-energy physics device of particle accelerator, under strong electromagnetic and x radiation x environment, the Beam position monitor system of accelerator is easily interfered and produces erroneous judgement.The invention provides a kind of based on Eight Diagrams limit accelerator beam position diagnostic system of probe distribution and method, by intelligent accuracy, real-time and the availability of effectively improving accelerator Beam position monitor system with visual Diagnostic Strategy.
The technical scheme that the present invention solves its technical matters is: a kind of accelerator beam position diagnostic system based on Eight Diagrams limit probe distribution; it is characterized in that comprising three-dimensional Eight Diagrams limit intercept type probe distribution mechanism, multirange passive filtering Signal-regulated kinase; beam current signal amplification module; beam current signal photoelectric isolation module; beam current signal acquisition module; the autonomous diagnostic module in beam position, interlock protection module and intelligent position shape decision support system (DSS), wherein:
Described three-dimensional Eight Diagrams limit intercept type probe distribution mechanism adopts four pairs of probes mutual layout in angle of 45 degrees on the vertical plane, institute sets up space coordinates make yz plane turn clockwise 22.5 degree, eight probes with the cross section of vacuum pipe for reference to adopting upper and lower, left and right, upper left, lower-left, upper right, eight, bottom right azimuth distribution in eight octants of space coordinates.
Wherein, described Eight Diagrams limit probe distribution mechanism is when particle accelerator system works, the electric charge that line incides its responsive end on two cross sections collected by Eight Diagrams limit probe be distributed on vacuum pipe wall simultaneously, goes out the signal of line eight octants by the electronics return circuit coupling of eight low perceptual milliohm levels; Electronics loop adopts coaxial resistance, and has good ground connection with external system, reduces interference further.
Wherein, described multirange passive filtering Signal-regulated kinase is positioned at the front end of beam position diagnostic system, integrated eight signal transmission passages, the integrated transient suppressor TVS in RC filtering circuit front end, can prevent the electronics damaging rear end in system in high voltage arc situation due to surge; Adopt passive conditioning to reduce outside amplify source noise to the interference of probe signals and improve signal to noise ratio (S/N ratio); The matching value of filter capacitor can adjust according to the neighbourhood noise frequency of accelerator operation; The range of conditioning module can adjust the actual conditions of bundle to zoom in or out according to accelerator, has widened the electronics dynamic range of module; Eight Diagrams limit beam current signal to nurse one's health into the voltage signal of low ripple by conditioning module;
Described beam current signal amplification module utilizes operational amplification circuit that the voltage signal that conditioning module exports is transformed into the acceptable voltage range of signal acquisition module; Beam current signal photoelectric isolation module utilizes light-electric coupling principle, and amplification module and signal acquisition module are carried out electrical isolation, prevents front-end equipment from damaging when causing circuit overvoltage and damages signal acquisition module and controller;
The voltage signal that isolation module exports by described beam current signal acquisition module is converted to the digital quantity needed when controller carries out programmed logic computing in real time, be stored in the input block of controller, controller according to routine processes process constantly refresh data buffer area.
Wherein, the autonomous diagnostic module in described beam position runs in the form of software in the controller, the information of eight sensing points that signal acquisition module obtains by diagnostic module is calculated in real time by position diagnosis algorithm, restraints biased moving between zone of alarm and is made up of tune bundle decision-making interval and interlock protection interval;
The probe data that four, each cross section octant is symmetrical is mutually subtracted each other by described position diagnosis algorithm between two, result after subtracting each other automatically enters bundle and biasedly moves warning interval judgement, and loop computation result is divided into two groups of data to be stored in different data blocks respectively according to the difference dropping on different interval range by diagnostic module; The data of bundle decision-making group are adjusted to be sent in the intelligent position shape decision support system (DSS) run at active station by communications protocol; the safety interlock system that the data of interlock protection group directly trigger accelerator as signal source performs corresponding machine upkeep action, and sends alarm in intelligent position shape decision support system (DSS) to operator with the form of False alarms lamp.
Wherein, described intelligent position shape decision support system (DSS) operates on active station industrial computer, drives layer to form by monitoring interface, variable administrative unit and communication; Monitoring interface adopts three-dimensional visualization control configuration, realize man-machine conversation visual in imagely, comprise Eight Diagrams limit the large decimal fractions of line and trend viewing area, alarm notice area, Interlock Status viewing area, alarm logging district, shape viewing area, intelligent position, decision support district, system directorial area;
Whether the bundle position discriminative information that described intelligent position shape decision support system (DSS) transmits according to position diagnostic system departs from vacuum pipe center and next step bundle strategy by monitoring interface prompting operator line.
The present invention also provides a kind of accelerator beam position diagnostic method based on Eight Diagrams limit probe distribution, it is characterized in that performing step is as follows:
Step S1: when particle accelerator runs, Eight Diagrams limit probe coupling be distributed on vacuum pipe wall goes out the beam current signal of line eight octants;
Step S2: the line information of eight octants is nursed one's health and is input to controller data memory block by signal amplification module, isolation module and acquisition module;
Step S3: the information of eight sensing points obtained is calculated by position diagnosis algorithm by beam position autonomous diagnostic module in real time, and result is put into biased the moving between zone of alarm of bundle and adjudicate; If four of the first cross section octants rule out line skew, then diagnostic routine at once according to off-set value in which interval, carry out corresponding alarm or interlock protection action; Perform step S5;
Step S4: if four of the first cross section octants rule out line without skew, then whether diagnostic routine rules out line according to four octants in the second cross section at once and offsets in other four orientation, and diagnostic routine carries out corresponding alarm or interlock protection action according to court verdict at once;
Step S5: whether what monitoring interface pointed out operator's line intuitively by three-dimensional animation departs from vacuum pipe center and next step bundle strategy;
Step S6: terminate.
The present invention's advantage is compared with prior art: Charged Couple that Eight Diagrams limit probe collection line be distributed on vacuum pipe wall incides its responsive end goes out beam current signal, the autonomous diagnostic module in position in controller calculates the positional information of line in real time according to Eight Diagrams voltage limit signal that signal acquisition module obtains, and operation result is sent to the intelligent position shape decision support system (DSS) of active station, adopt three-dimensional animation to point out operator's line whether off normal and adjust bundle strategy intuitively.Meanwhile, this diagnostic system can produce according to bundle position alarm threshold value the action that interlock protection signal triggering secure interlocking system performs protection personnel and machine.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of the accelerator beam position diagnostic system that the present invention is based on Eight Diagrams limit probe distribution;
Fig. 2 is the three-dimensional probe distribution mechanism of the accelerator beam position diagnostic system that the present invention is based on Eight Diagrams limit probe distribution;
Fig. 3 is the probe distribution mechanism front view of the accelerator beam position diagnostic system that the present invention is based on Eight Diagrams limit probe distribution;
Fig. 4 is the operation interface schematic diagram of the accelerator beam position diagnostic system that the present invention is based on Eight Diagrams limit probe distribution;
Fig. 5 is the workflow diagram of the accelerator beam position diagnostic system that the present invention is based on Eight Diagrams limit probe distribution.
Embodiment
The understanding the present invention changed to make those skilled in the art, carries out clear, complete description below in conjunction with the accompanying drawing in the present invention to the technical scheme in the embodiment of the present invention.
Embodiment 1:
Use based on Eight Diagrams limit probe distribution accelerator beam position diagnostic system, complete bundle position normal time, the processing procedure of position diagnostic system.
As shown in Figure 1, the present invention includes three-dimensional Eight Diagrams limit intercept type probe distribution mechanism, multirange passive filtering Signal-regulated kinase, beam current signal amplification module, beam current signal photoelectric isolation module, beam current signal acquisition module, the autonomous diagnostic module in beam position, intelligent position shape decision support system (DSS);
Particle accelerator is started shooting and is run out bundle under the condition meeting safety interlocking, and Charged Couple that Eight Diagrams limit probe collection line be distributed on vacuum pipe wall incides its responsive end goes out beam current signal, as shown in Figure 2 and Figure 3;
Operator logs in monitoring interface, and monitoring interface layout as shown in Figure 4;
The beam current signal of eight octants is showed operator from trend viewing area by the formal intuition ground that numeral is different with history curve two kinds by the large decimal fractions of Eight Diagrams limit line;
Interlock Status viewing area is for showing bundle position court verdict whether triggering secure interlocking system;
Under the condition not meeting triggering secure interlocking, operator is pointed out with False alarms lamp when alarm notice area is for pointing out operator to restraint biased moving;
Alarm logging district is for recording the alarm times in the diagnostic system work of beam position, the information such as moment of reporting to the police;
Intelligence shape viewing area, position is by the operating mode of three-dimensional visualization control simulates real vacant duct, and display line in visual pattern ground is in the position of vacuum pipe;
Decision support district, according to position court verdict, by the operating mode of three-dimensional visualization control simulates real vacant duct, and moves bundle with the arrow prompting operator of flicker to the orientation of correspondence;
Beam current signal is sent to the data storage area of controller through passive filtering Signal-regulated kinase, signal amplification module, signal isolation module and signal acquisition module;
Beam position diagnostic module is subtracted each other between two by the probe data that diagnosis algorithm is symmetrical mutually to four, each cross section octant, result after subtracting each other automatically enters bundle and biasedly moves warning interval judgement, and loop computation result is divided into two groups of data to be stored in different data blocks respectively according to the difference dropping on different interval range by diagnostic module;
If the first bundle position, cross section is normal after judgement, then diagnostic module starts the bundle position information judgement in the second cross section, if the second bundle position, cross section information judgement is normal, as shown in Figure 5, the bundle result of decision is adjusted to be sent in the intelligent position shape decision support system (DSS) run at active station by communications protocol, it is normal that prompting operator restraints position
Embodiment 2:
Use the accelerator beam position diagnostic system based on Eight Diagrams limit probe distribution, when beam excursion amount enters tune bundle decision-making interval, position diagnostic system will perform the following course of work.
Particle accelerator is started shooting and is run out bundle under the condition meeting safety interlocking, and operator logs in monitoring interface;
Beam current signal is sent to the data storage area of controller through passive filtering Signal-regulated kinase, signal amplification module, signal isolation module and signal acquisition module;
Beam position diagnostic module is subtracted each other between two by the probe data that diagnosis algorithm is mutually symmetrical to four, each cross section octant, and the result after subtracting each other enters that bundle is biased moves warning interval judgement automatically;
Move if the first cross section bundle is biased after judgement, then operation result is adjudicated stored in biased the moving between zone of alarm of bundle by diagnostic module, as shown in Figure 5, if discontented Football Association lock protective condition, then intelligent position shape decision support system (DSS) produces at operation interface and adjusts bundle strategy prompting operator;
If the first bundle position, cross section is normal after judgement; then diagnostic module starts the bundle position information judgement in the second cross section; if the second bundle position, cross section information court verdict is skew; then operation result is adjudicated stored in biased the moving between zone of alarm of bundle by diagnostic module; if discontented Football Association lock protective condition, then intelligent position shape decision support system (DSS) produces at operation interface and adjusts bundle strategy prompting operator.
Embodiment 3:
Use the accelerator beam position diagnostic system based on Eight Diagrams limit probe distribution, when beam excursion amount enters interlock protection interval, position diagnostic system will perform the following course of work.
Particle accelerator is started shooting and is run out bundle under the condition meeting safety interlocking, and operator logs in monitoring interface;
Beam current signal is sent to the data storage area of controller through passive filtering Signal-regulated kinase, signal amplification module, signal isolation module and signal acquisition module;
Beam position diagnostic module is subtracted each other between two by the probe data that diagnosis algorithm is mutually symmetrical to four, each cross section octant, and the result after subtracting each other enters that bundle is biased moves warning interval judgement automatically;
Move if the first cross section bundle is biased after judgement, then operation result is adjudicated stored in biased the moving between zone of alarm of bundle by diagnostic module, as shown in Figure 5, if meet interlock protection condition, the safety interlock system that position diagnostic system provides a signal to trigger accelerator performs corresponding machine upkeep action, and sends alarm in intelligent position shape decision support system (DSS) to operator with the form of False alarms lamp;
If the first bundle position, cross section is normal after judgement; then diagnostic module starts the bundle position information judgement in the second cross section; move if the second cross section bundle is biased; then operation result is adjudicated stored in biased the moving between zone of alarm of bundle by diagnostic module; if meet interlock protection condition; the safety interlock system that position diagnostic system provides a signal to trigger accelerator performs corresponding machine upkeep action, and sends alarm in intelligent position shape decision support system (DSS) to operator with the form of False alarms lamp.
Claims (6)
1. the accelerator beam position diagnostic system based on Eight Diagrams limit probe distribution; it is characterized in that: comprise three-dimensional Eight Diagrams limit intercept type probe distribution mechanism, multirange passive filtering Signal-regulated kinase; beam current signal amplification module; beam current signal photoelectric isolation module; beam current signal acquisition module; the autonomous diagnostic module in beam position, interlock protection module and intelligent position shape decision support system (DSS), wherein:
Described three-dimensional Eight Diagrams limit intercept type probe distribution mechanism adopts four pairs of probes mutual layout in angle of 45 degrees on the vertical plane, institute sets up space coordinates make yz plane turn clockwise 22.5 degree, eight probes with the cross section of vacuum pipe for reference to adopting upper and lower, left and right, upper left, lower-left, upper right, eight, bottom right azimuth distribution in eight octants of space coordinates; During particle accelerator system works, the electric charge that line incides its responsive end on two cross sections collected by Eight Diagrams limit probe be distributed on vacuum pipe wall simultaneously, the signal of line eight octants is gone out by the return circuit coupling of eight low perceptual milliohm levels, electronics loop adopts coaxial resistance, and there is good ground connection with external system, reduce interference further.
2. a kind of accelerator beam position diagnostic system based on Eight Diagrams limit probe distribution according to claim 1, it is characterized in that: described multirange passive filtering Signal-regulated kinase is positioned at the front end of beam position diagnostic system, integrated eight signal transmission passages, the integrated transient suppressor TVS in RC filtering circuit front end, can prevent the electronics damaging rear end in system in high voltage arc situation due to surge; Adopt passive conditioning to reduce outside amplify source noise to the interference of probe signals and improve signal to noise ratio (S/N ratio); The matching value of filter capacitor can adjust according to the neighbourhood noise frequency of accelerator operation; The range of conditioning module can adjust the actual conditions of bundle to zoom in or out according to accelerator, has widened the electronics dynamic range of module; Eight Diagrams limit beam current signal to nurse one's health into the voltage signal of low ripple by conditioning module.
3. a kind of accelerator beam position diagnostic system based on Eight Diagrams limit probe distribution according to claim 1, is characterized in that: described beam current signal amplification module utilizes operational amplification circuit that the voltage signal that conditioning module exports is transformed into the acceptable voltage range of signal acquisition module; Beam current signal photoelectric isolation module utilizes light-electric coupling principle, and amplification module and signal acquisition module are carried out electrical isolation, prevents front-end equipment from damaging when causing circuit overvoltage and damages signal acquisition module and controller;
The voltage signal that isolation module exports by described beam current signal acquisition module is converted to the digital quantity needed when controller carries out programmed logic computing in real time, be stored in the input block of controller, controller according to routine processes process constantly refresh data buffer area.
4. a kind of accelerator beam position diagnostic system based on Eight Diagrams limit probe distribution according to claim 1, it is characterized in that: the autonomous diagnostic module in described beam position runs in the form of software in the controller, the information of eight sensing points that signal acquisition module obtains by diagnostic module is calculated in real time by position diagnosis algorithm, restraints biased moving between zone of alarm and is made up of tune bundle decision-making interval and interlock protection interval;
The probe data that four, each cross section octant is symmetrical is mutually subtracted each other by described position diagnosis algorithm between two, result after subtracting each other automatically enters bundle and biasedly moves warning interval judgement, and loop computation result is divided into two groups of data to be stored in different data blocks respectively according to the difference dropping on different interval range by diagnostic module; The data of bundle decision-making group are adjusted to be sent in the intelligent position shape decision support system (DSS) run at active station by communications protocol; the safety interlock system that the data of interlock protection group directly trigger accelerator as signal source performs corresponding machine upkeep action, and sends alarm in intelligent position shape decision support system (DSS) to operator with the form of False alarms lamp.
5. a kind of accelerator beam position diagnostic system based on Eight Diagrams limit probe distribution according to claim 1, it is characterized in that: described intelligent position shape decision support system (DSS) operates on active station industrial computer, drives layer to form by monitoring interface, variable administrative unit and communication; Monitoring interface adopts three-dimensional visualization control configuration, realize man-machine conversation visual in imagely, comprise Eight Diagrams limit the large decimal fractions of line and trend viewing area, alarm notice area, Interlock Status viewing area, alarm logging district, shape viewing area, intelligent position, decision support district, system directorial area;
Whether the bundle position discriminative information that described intelligent position shape decision support system (DSS) transmits according to position diagnostic system departs from vacuum pipe center and next step bundle strategy by monitoring interface prompting operator line.
6., based on an accelerator beam position diagnostic method for Eight Diagrams limit probe distribution, it is characterized in that performing step is as follows:
Step S1: when particle accelerator runs, Eight Diagrams limit probe coupling be distributed on vacuum pipe wall goes out the beam current signal of line eight octants;
Step S2: the line information of eight octants is nursed one's health and is input to controller data memory block by signal amplification module, isolation module and acquisition module;
Step S3: the information of eight sensing points obtained is calculated by position diagnosis algorithm by beam position autonomous diagnostic module in real time, and result is put into biased the moving between zone of alarm of bundle and adjudicate; If four of the first cross section octants rule out line skew, then diagnostic routine at once according to off-set value in which interval, carry out corresponding alarm or interlock protection action; Perform step S5;
Step S4: if four of the first cross section octants rule out line without skew, then whether diagnostic routine rules out line according to four octants in the second cross section at once and offsets in other four orientation, and diagnostic routine carries out corresponding alarm or interlock protection action according to court verdict at once;
Step S5: whether what monitoring interface pointed out operator's line intuitively by three-dimensional animation departs from vacuum pipe center and next step bundle strategy;
Step S6: terminate.
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| CN113093261A (en) * | 2021-04-02 | 2021-07-09 | 中国科学院近代物理研究所 | Beam diagnosis interlocking system for beam terminal of heavy ion treatment device |
| CN114423141A (en) * | 2022-01-19 | 2022-04-29 | 中国科学院近代物理研究所 | Machine protection method and system for high-current superconducting accelerator |
| CN114423141B (en) * | 2022-01-19 | 2023-08-04 | 中国科学院近代物理研究所 | Machine protection method and system for high-current superconducting accelerator |
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