CN117388777A - Excitation curve conversion system for I/B conversion of pulse power supply with preset value - Google Patents
Excitation curve conversion system for I/B conversion of pulse power supply with preset value Download PDFInfo
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 55
- 230000005284 excitation Effects 0.000 title claims abstract description 40
- 238000000605 extraction Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- 229910052742 iron Inorganic materials 0.000 claims description 12
- 238000012937 correction Methods 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 4
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- 238000004364 calculation method Methods 0.000 description 15
- 238000013461 design Methods 0.000 description 8
- 238000011084 recovery Methods 0.000 description 8
- 239000002245 particle Substances 0.000 description 5
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- 230000004069 differentiation Effects 0.000 description 4
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- 230000003068 static effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1253—Measuring galvano-magnetic properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/0023—Electronic aspects, e.g. circuits for stimulation, evaluation, control; Treating the measured signals; calibration
- G01R33/0029—Treating the measured signals, e.g. removing offset or noise
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Abstract
The invention relates to the technical field of excitation curve conversion, in particular to an excitation curve conversion system for I/B conversion of a pulse power supply with a preset value; the method comprises the following steps: when B- > I is converted, firstly, according to a preset current value setI_Tmp obtained by calculating a preset magnetic field value B-SET, the effective Length BT-Length of magnetic field waveform data and the magnetic field waveform data BT-SET, calculating 20 ten thousand point current waveform data setWaveI_Raw according to an excitation curve fitting coefficient, outputting data in the setWaveI_Raw to the setWaveI according to the effective data Length, and triggering a power supply remote control program WFCreate to issue waveform data; when I- > B is converted, firstly, reading back a real-time current curve extraction value GetWaveI according to a certain period for 5 seconds, and calculating a magnetic field waveform extraction value BT according to an excitation curve fitting coefficient; the system provided by the invention can be applied to a large scientific device, has strong compatibility, is simple to install and use, can perform real-time conversion on a pulse power supply with a preset value, and can generate an EPICS record aiming at the pulse power supply with the preset value and realize the automatic conversion of I and B.
Description
Technical Field
The invention relates to the technical field of excitation curve conversion, in particular to an excitation curve conversion system for I/B conversion of a pulse power supply with a preset value.
Background
In the accelerator field, a magnetic field is generally used to constrain the motion of charged particles in a vacuum tube, and the required magnetic field lines and field strengths are different depending on whether the charged particles are moving in a straight line or a circle and the energy of the particles. The various magnetic fields are generated by supplying the required current to the coil through a direct current, alternating current or pulse power supply, and the excitation curve is obtained through actual magnetic measurement. The power supply system can provide a real-time current value I, and a magnetic field value B is used in the physical beam adjusting software, so that an IOC program is needed to convert the I and the B in real time, and the adjustment and the monitoring of the running track of the charged particles can be realized. The design of the IOC program is most mainly to design the runtime database-EPICS record file. The interconversion logic and calculation formula of I and B are complex, the calculation coefficients needed to be carried into the formula are many, if the EPICS record file is written manually, the workload is huge and error is easy to occur, and if the program logic or calculation data are changed, the EPICS record file needs to be rewritten completely. The pulse power supply with preset value is a common power supply for various accelerators, so that in the technical field of accelerators, especially in a system for converting an excitation curve of an accelerator, it is necessary to design a system and a method capable of generating EPICS records and realizing automatic conversion of the pulse power supplies I and B with preset values.
Disclosure of Invention
Aiming at the technical requirement of an accelerator, the invention aims to provide an excitation curve conversion system for I/B conversion of a pulse power supply with a preset value.
The technical scheme adopted by the invention is as follows: the excitation curve conversion system is used for I/B conversion of a pulse power supply with a preset value, the system converts a physically set magnetic field value into a current value required by the power supply or converts the current value of the power supply into a corresponding magnetic field value, and the whole system comprises an IBConverter program module and an EPICS DBgenerator program module, wherein the IBConverter program is a standard EPICS software IOC and needs to run all the time to realize real-time conversion of I and B; the epics DBGenerator program module is used for generating a DB file required by the IBConverter program, and when the number, the name and the excitation curve fitting coefficient of the power supply change, the program needs to be operated to generate a new DB file; when the system is used for a pulse power supply with a preset value, the I/B conversion method comprises the following steps:
when B- > I is converted, firstly, calculating a preset current value setI_Tmp, a magnetic field waveform data effective Length BT-Length and a magnetic field waveform data BT-SET according to a preset magnetic field value B-SET, calculating 20 ten thousand point current waveform data setWaveI_Raw according to an excitation curve fitting coefficient, setting an effective data Length setWaveI_Out.NUSE which is output to the setWaveI according to the BT-Length, and finally outputting data in the setWaveI_Raw to the setWaveI according to the effective data Length and triggering a power supply remote control program WFCreate to issue waveform data;
when I- > B is converted, firstly, the real-time current curve extraction value GetWaveI is read back according to a certain period for 5 seconds, and the magnetic field waveform extraction value BT is calculated according to the excitation curve fitting coefficient.
The pulse power supply with the preset value comprises a dipolar iron, a quadrupole iron, a hexapole iron and a correction iron pulse power supply on the synchronous ring.
The invention has the beneficial effects that: the system provided by the invention can be applied to a large scientific device, has strong compatibility, is simple to install and use, can perform real-time conversion on a pulse power supply with a preset value, and can generate an EPICS record aiming at the pulse power supply with the preset value and realize the automatic conversion of I and B.
Drawings
Fig. 1 is a schematic diagram of the overall logic connection structure of the excitation curve conversion system in the present invention.
Fig. 2 is a logic diagram of switching the excitation curve of the dc power supply in the first embodiment.
Fig. 3 is a logic diagram of converting pulse waveform data according to the second embodiment.
FIG. 4 is a schematic diagram showing the conversion logic of the excitation curve of the floating power supply according to the fourth embodiment
Detailed Description
As shown in fig. 1-4, a system for converting an excitation curve of an accelerator is used for converting a physically set magnetic field value into a current value required by a power supply or converting the current value of the power supply into a corresponding magnetic field value in the accelerator, and the whole system comprises an IBConvert program module and an epics dbgenerator program module. The IBConverter program is a standard EPICS soft IOC and needs to run all the time to realize real-time conversion of I (current) and B (magnetic field); the epics dbgenerator module adopts a Java application program for generating DB (database in runtime) files required by the IBConvert program, and when the number of power sources, the name, and the excitation curve fitting coefficient change, the program needs to be run to generate new DB files.
The ibovert program module in the present invention is designed according to the EPICS specification, and mainly includes the design of EPICS (EPICS, i.e. "experimental physics and industry control system" (Experimental Physics and Industrial Control System), and two basic mechanisms in the EPICS software system are channel access and distributed dynamic database.) recorded design and function design of processing waveform data. Among them, EPICS recording is the core for realizing I and B conversion. According to the conversion requirements in the technical protocol and the type of the magnet power supply, four types of power supplies can be classified: the power supply comprises a direct current power supply, a pulse power supply with a preset value, a convex rail pulse power supply without a preset value and a pulse power supply with a floating power supply. The design of EPICS records is also performed according to the classification of power sources, and the DB file of the design includes: the DC.db file is used for realizing the I/B conversion of a direct current power supply except a floating power supply; the pulsewith dc.db file is a pulse power source I/B conversion with a preset value, except for a quadrupole magnet pulse power source; the InjectionBump.db file is the I/B conversion of the pulse power supply of the convex rail magnet without a preset value; the quadrupole file is the I/B conversion of a quadrupole magnet pulse power supply and a floating power supply thereof; the energy factor file is used for realizing the related calculation and parameter setting of the energy factors; the iocdominsoft. Db file is derived from the software package devIocStats for monitoring the IOC operating state.
Embodiment one: I/B conversion for DC power supply
The dc power supply in this embodiment includes an MEBT (medium energy beam transmission line), an HEBT (high energy beam transmission line) and a ring dc power supply, except for the floating power supply, because the calculation method of the floating power supply is different. The magnetic fields of the MEBT and the HEBT need to consider energy correction, the MEBT needs to use the static energy of negative hydrogen ions, the HEBT needs to use the static energy of protons, and in order to enable the JAVA program for generating the EPICS DB to be convenient to develop, the magnetic field on the ring also introduces an energy factor, but the value of the magnetic field is always 1, and the calculation result is not influenced.
Taking a direct current power supply M, MG, HC01-PS as an example, the I/B conversion logic is as shown in figure 1:
when B- > I is converted, a theoretical magnetic field value B-SET is firstly SET, an Actual magnetic field SET value B-SET_actual is obtained through calculation according to an Energy Factor energy_factor, a current SET value SetI is obtained through calculation according to an excitation curve fitting coefficient, and the current SET value SetI is sent to a power supply remote control program.
When I- > B is converted, firstly, the real-time current extraction value GetI is read back according to a certain period, such as 1 second (the period can be modified in st.cmd), the Actual magnetic field extraction value B_actual is obtained through calculation according to the excitation curve fitting coefficient, and then the theoretical magnetic field extraction value B is obtained through calculation according to the Energy Factor energy_factor. For a separately powered magnet, the calculated theoretical magnetic field recovery values include PID: B and MID: B, which values are exactly equal. For the case that one power supply supplies power to a plurality of magnets, the PID (proportion integration differentiation) B and the MID (proportion integration differentiation) B are calculated by using the real-time recovery current value GetI, except that the PID (proportion integration differentiation) B is calculated by using the average excitation curve fitting coefficient, and the MID (proportion integration differentiation) B is calculated by using the respective excitation curve fitting coefficient.
In this embodiment, during the I/B conversion, theoretical kinetic energy, actual kinetic energy and static energy parameters of the particles of the MEBT and HEBT need to be set, and no special requirements are required for the setting sequence and timing.
Embodiment two: I/B conversion for pulsed power supply with preset value
The pulse power supply with the preset value comprises a pulse power supply of dipolar iron, quadrupolar iron, hexapole iron and correction iron on the synchronous ring. Such power supplies need to convert the magnetic field preset value and the total magnetic field waveform data.
Taking the pulse power supply R, MG and VC01 as examples, the conversion of the preset value is identical to the conversion logic of the direct current power supply I/B in the embodiment, and is not described here again, and the conversion of the pulse waveform data is shown in fig. 2.
When B- > I is converted, firstly, according to a preset current value setI_Tmp obtained by calculating a preset magnetic field value B-SET, the effective Length BT-Length of magnetic field waveform data and the magnetic field waveform data BT-SET, 20 ten thousand point current waveform data setWaveI_Raw are obtained by calculating an excitation curve fitting coefficient, then according to BT-Length, the effective data Length setWaveI_Out.NUSE which is output to the setWaveI is SET, and finally, data in the setWaveI_Raw is output to the setWaveI according to the effective data Length and a power remote control program WFCreate is triggered to issue waveform data.
When I- > B is converted, firstly, the real-time current curve extraction value GetWaveI is read back according to a certain period, such as 5 seconds (the period can be modified in st.cmd), and the magnetic field waveform extraction value BT is obtained through calculation according to the excitation curve fitting coefficient. For a separately powered magnet, the calculated magnetic field waveform recovery values include PID, BT and MID, BT, which are exactly equal. For the case that one power supply supplies power to a plurality of magnets, the PID (potential difference) BT and MID (potential difference) BT are calculated by using the real-time stopcurrent value GetWaveI, and the difference is that the PID (potential difference) BT is calculated by using the average excitation curve fitting coefficient, and the MID (potential difference) BT is calculated by using the respective excitation curve fitting coefficient.
In this embodiment, when converting magnetic field waveform data into current waveform data, it is necessary to SET a magnetic field preset value B-SET first, then SET a waveform effective Length BT-Length, and finally SET magnetic field waveform data BT-SET again, wherein the setting sequence is determined by the calculation and programming logic of SetI and BT-Length. No matter which setting is modified, the magnetic field waveform data BT-SET will eventually need to be reset to be effective.
Embodiment III: I/B conversion for track pulse power supply without preset value
The two track pulse power supplies on the synchronous ring have no preset value, and the conversion of pulse waveform data is the same as the conversion method described in the second embodiment, and will not be described here.
In this embodiment, when converting the magnetic field waveform data into the current waveform data, the effective waveform Length BT-Length needs to be SET first, and then the magnetic field waveform data BT-SET needs to be SET in the order determined by the BT-Length needed to participate in the calculation and the programming logic. No matter which setting is modified, the magnetic field waveform data BT-SET will eventually need to be reset to be effective.
Embodiment four: I/B conversion for quadrupole magnet pulse power source and floating power source thereof
The four-pole magnet pulse power supply is identical to the pulse power supply conversion method with the preset value described in the second embodiment, and the floating power supply is related to the corresponding main magnet power supply.
Taking floating power supplies R: MG: QD01-FPS01 and R: MG: QD01-FPS02 as examples, the I/B conversion logic is shown in FIG. 3.
When B- > I is converted, firstly, setting a Total magnetic field value QD-PS of a main pulse power supply to B-SET, calculating to obtain a Total current SET value QD-PS according to an average excitation curve fitting coefficient, reversely calculating a magnetic field value SET value QD01-FPS01 of each main quadrupole magnet according to the current and the fitting coefficient of each main quadrupole magnet to B-SET_all, superposing the magnetic field SET values of a floating power supply to obtain a new magnetic field value QD01-FPS01 to B-SET_total, calculating to obtain a Total current value according to the fitting coefficient of each floating power supply, subtracting the current value QD-PS of the main magnet power supply to SetI to obtain a floating power supply current SET value QD01-FPS01 to SetI, and issuing the floating power supply current SET value to a power supply remote control program, wherein the current value of QD01-FPS02 is obtained from QD01-FPS01 and always keeps consistent.
When I- > B is converted, firstly, the real-time current recovery values R of the main magnet power supply and the floating power supply are read back according to a certain period, such as 1 second (the period can be modified in st.cmd), wherein the MG is QD-PS is GetI and the QD01-FPS01 is GetI, the Total current recovery values QD01-FPS01 are obtained after superposition, the Total magnetic field recovery values are obtained through calculation according to respective excitation curve fitting coefficients, and the magnetic field recovery values QD01-FPS02 of the floating power supply are obtained after subtracting the respective main magnetic field recovery values QD 01-B.
In this embodiment, the notice of the excitation curve conversion of the main quadrupole magnet pulse power source is the same as that described in the second embodiment, and the floating power source needs to be careful to set the preset value of the main magnetic field and then set the magnetic field set value of the floating power source when performing the excitation curve conversion. Since the MID of the floating power supply is the same as the MID of the main quadrupole magnet pulse power supply, the MID of the floating power supply is not converted any more.
In the invention, waveform data need to be processed when the pulse magnet power supply carries out excitation curve conversion, namely, each magnetic field waveform data or current waveform data need to be calculated according to an excitation curve fitting coefficient, and the calculation methods of the pulse power supply with a preset value and the pulse power supply without the preset value during I/B conversion are different. To achieve this function, it is necessary to use an Array sub record of EPICS, through which a different C program can be called, and conversion of waveform data is completed in the C program.
In the invention, when the IBConverter program module is installed, the computer is required to be as follows: the physical PC, the workstation or the virtual machine can be used; at least 4G of memory; the Linux operating system is preferably Redhat or Centos, and the version is 6.0 or more; software version requirements: EPICS base version 3.14 or 3.15; the synApps version was 5.6 and above.
The IBConverter program module is installed by the following steps:
s1, decompressing the IBConvert program package to any user directory according to the requirement.
S2, modifying IBConverter/configuration/RELEASE files, and designating absolute installation paths of EPICS_ BASE, AUTOSAVE, IOCADMIN and CALC.
And S3, executing make clean & & make under the IBConvert catalog.
When the IBConverter program module is normally operated, the invention can be matched with graphics software of a third party, such as Control System Studio (CSS), openXAL software and the like, which contain EPICS channel access protocol (channel access support), and the OpenXAL software is recommended to be used, and the software is an Open-source and cross-platform pure Java program, can provide rich upper-layer application programs for physical beam adjustment of an accelerator, and is widely applied to national and international large scientific devices at present.
According to the application method of the EPICS DBGenerator program module, the EPICS DBGenerator program module is used for reading the excitation curve coefficients stored in Excel and automatically generating an EPICS DB file for I and B conversion. The epics dbgenerator uses java language development, the compiling and running environment is required to be more than JKD7, and jxl packages are used for reading Excel tables. Therefore, the Excel file needs to be converted into a file with a suffix xls.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. A excitation curve conversion system for taking pulse power I/B conversion of default, its characterized in that: the system converts a physically set magnetic field value into a current value required by a power supply or converts the current value of the power supply into a corresponding magnetic field value in an accelerator, and the whole system comprises an IBConverter program module and an EpicsDBgenerator program module, wherein the IBConverter program is a standard EPICS software IOC and needs to run all the time to realize real-time conversion of I and B; the epics DBGenerator program module is used for generating a DB file required by the IBConverter program, and when the number, the name and the excitation curve fitting coefficient of the power supply change, the program needs to be operated to generate a new DB file; when the system is used for a pulse power supply with a preset value, the I/B conversion method comprises the following steps:
when B- > I is converted, firstly, calculating a preset current value setI_Tmp, a magnetic field waveform data effective Length BT-Length and a magnetic field waveform data BT-SET according to a preset magnetic field value B-SET, calculating 20 ten thousand point current waveform data setWaveI_Raw according to an excitation curve fitting coefficient, setting an effective data Length setWaveI_Out.NUSE which is output to the setWaveI according to the BT-Length, and finally outputting data in the setWaveI_Raw to the setWaveI according to the effective data Length and triggering a power supply remote control program WFCreate to issue waveform data;
when I- > B is converted, firstly, the real-time current curve extraction value GetWaveI is read back according to a certain period for 5 seconds, and the magnetic field waveform extraction value BT is calculated according to the excitation curve fitting coefficient.
2. The excitation curve conversion system for I/B conversion of a pulse power source with a preset value according to claim 1, characterized in that: the pulse power supply with the preset value comprises a dipolar iron, a quadrupole iron, a hexapole iron and a correction iron pulse power supply on the synchronous ring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310672209.1A CN117388777A (en) | 2021-07-02 | 2021-07-02 | Excitation curve conversion system for I/B conversion of pulse power supply with preset value |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310672209.1A CN117388777A (en) | 2021-07-02 | 2021-07-02 | Excitation curve conversion system for I/B conversion of pulse power supply with preset value |
| CN202110753262.5A CN113466762B (en) | 2021-07-02 | 2021-07-02 | System for accelerator excitation curve conversion |
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| CN202110753262.5A Division CN113466762B (en) | 2021-07-02 | 2021-07-02 | System for accelerator excitation curve conversion |
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| CN202310672376.6A Pending CN116699486A (en) | 2021-07-02 | 2021-07-02 | Excitation curve conversion system for I/B conversion of floating power supply |
| CN202310672209.1A Pending CN117388777A (en) | 2021-07-02 | 2021-07-02 | Excitation curve conversion system for I/B conversion of pulse power supply with preset value |
| CN202310672295.6A Pending CN116520211A (en) | 2021-07-02 | 2021-07-02 | Epicenter DBGenerator program module for accelerator excitation curve conversion system |
| CN202110753262.5A Active CN113466762B (en) | 2021-07-02 | 2021-07-02 | System for accelerator excitation curve conversion |
| CN202310672225.0A Pending CN116609713A (en) | 2021-07-02 | 2021-07-02 | IBConverter program module for accelerator excitation curve conversion system |
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| CN202110753262.5A Active CN113466762B (en) | 2021-07-02 | 2021-07-02 | System for accelerator excitation curve conversion |
| CN202310672225.0A Pending CN116609713A (en) | 2021-07-02 | 2021-07-02 | IBConverter program module for accelerator excitation curve conversion system |
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| CN102548182A (en) * | 2012-01-14 | 2012-07-04 | 中国科学院近代物理研究所 | Operation method for eliminating hysteresis effect influence of synchronous accelerator |
| CN102982963B (en) * | 2012-11-14 | 2015-06-24 | 中国科学院高能物理研究所 | Electromagnet power source and control method and digital controller thereof |
| JP2016007456A (en) * | 2014-06-26 | 2016-01-18 | 株式会社日立製作所 | Particle beam therapy system and method of initializing electromagnet |
| CN105813367B (en) * | 2016-03-10 | 2018-06-19 | 东莞中子科学中心 | A kind of method and apparatus that high-precision time-varying magnetic field is obtained on a.c. magnet |
| JP2019195408A (en) * | 2018-05-08 | 2019-11-14 | 株式会社日立製作所 | Scanning irradiation device and particle beam therapy system, and adjustment method of scanning irradiation device |
| CN110234196B (en) * | 2019-06-04 | 2021-11-30 | 中国科学院近代物理研究所 | Digital low-level system for synchrotron |
| CN110856336B (en) * | 2019-11-27 | 2024-07-02 | 中国原子能科学研究院 | Real-time adjustment equipment and method for magnet power supply of cyclotron |
| CN111462975B (en) * | 2020-03-31 | 2021-05-18 | 清华大学 | Magnetic field generation method, synchrotron, storage medium and equipment |
| CN111556643B (en) * | 2020-05-09 | 2021-10-22 | 清华大学 | Magnetic field generation method and synchrotron |
| CN112996214B (en) * | 2021-02-19 | 2023-07-21 | 中国科学院近代物理研究所 | Magnetic field stability control system and method |
| CN116699486A (en) * | 2021-07-02 | 2023-09-05 | 散裂中子源科学中心 | Excitation curve conversion system for I/B conversion of floating power supply |
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| WO2023273577A1 (en) | 2023-01-05 |
| CN113466762A (en) | 2021-10-01 |
| CN113466762B (en) | 2023-06-27 |
| CN116609713A (en) | 2023-08-18 |
| CN116520211A (en) | 2023-08-01 |
| CN116699486A (en) | 2023-09-05 |
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