CN-121978599-A - Off-line debugging method for convex rails of multiple impact magnets based on total integrated field residual ratio closed-loop optimization

CN121978599ACN 121978599 ACN121978599 ACN 121978599ACN-121978599-A

Abstract

The invention discloses a method for offline debugging a plurality of impact magnet convex rails based on total integrated field residual ratio closed loop optimization, which relates to the technical field of pulsed magnet magnetic field measurement and debugging and specifically comprises the following steps: according to the invention, long integral coils penetrating through a plurality of impact magnets are arranged along a beam nominal track, total integral field signals are synchronously collected under the same triggering condition, and the ratio of an actually measured total integral field to a reference total integral field is calculated as a residual ratio so as to quantify the quality of a closed track. When the residual ratio exceeds a preset threshold, the system automatically calculates exciting current and trigger delay correction quantity according to the residual ratio, adjusts driving parameters, repeatedly measures to form closed loop optimization, and records the current parameter combination as an offline debugging result until the residual ratio meets the requirement.

Inventors

SHANG LEI
ZHANG JINGYI
SHANG FENGLEI
SONG WENBIN
Request for anonymity
DING XIAO

Assignees

中国科学技术大学

Dates

Publication Date: 20260505
Application Date: 20260408

Claims (10)

1. The off-line debugging method for the convex rails of the plurality of impact magnets based on total integrated field residual ratio closed loop optimization is characterized by comprising the following steps: Arranging a long integral coil along the beam nominal track direction, enabling the long integral coil to sequentially penetrate through the effective magnetic field areas of a plurality of impact magnets, enabling the transverse reference positions of the coil in each magnet to be consistent and located at the corresponding position of a stored beam design track, enabling coil end loops and bending parts to be distributed outside the edge field of the outermost impact magnet, and enabling the effective length of the coil to cover all measurement areas from the first impact magnet to the last impact magnet; step two, connecting a long integral coil with an integrator to finish measurement link calibration, driving a plurality of impact magnets to work simultaneously according to set triggering conditions, collecting total integral field signals through the long integral coil and the integrator, and processing output waveforms of the integrator to calculate an actually measured total integral field; And thirdly, calculating a residual ratio according to a system design closing condition and a reference standard, automatically calculating a debugging parameter correction amount according to the residual ratio and adjusting an impact magnet driving parameter if the residual ratio is larger than a preset threshold value, repeating the second step to form closed loop optimization, and judging that the closing quality of a local convex rail formed by a plurality of impact magnets meets the offline debugging requirement if the residual ratio is not larger than the preset threshold value, and recording the current parameter combination as an offline debugging result.
2. The method for offline debugging of a plurality of impact magnet convex rails based on total integrated field residual ratio closed loop optimization of claim 1, wherein the arrangement rule of the long integrated coil further comprises that when a design track is coincident with a geometric center of a magnet, the coil is arranged at a center position of a magnetic gap, and an effective induction section of the coil keeps the same linear reference in a drift section among the plurality of impact magnets, so that additional area errors caused by transverse offset or torsion are avoided.
3. The method for off-line debugging of the convex rails of the plurality of impact magnets based on the closed loop optimization of the residual ratio of the total integrated field according to claim 1 is characterized in that the long integrated coils arranged in the first step are integrated coil structures with coaxial transmission lines connected in sequence, the effective induction sections are designed continuously without break points, and the number of turns, the effective area and the overall length of the coils are calibrated and recorded according to the effective magnetic field area size and the beam design track parameters of the plurality of impact magnets and are used as basic calibration parameters for conversion of the total integrated field in the follow-up actual measurement.
4. The method for off-line debugging of the convex tracks of the multiple impact magnets based on total integrated field residual ratio closed loop optimization according to claim 1, wherein the integrator is a passive integrator and consists of a series resistor and a capacitor to ground, and the resistance value and the capacitance value of the integrator are selected according to the pulse width of the impact magnets, so that the integration time constant is larger than a preset multiple of the pulse width of the impact magnets, and the linear proportional relation between the output voltage of the integrator and the average magnetic field in the coil is ensured.
5. The method for off-line debugging of a plurality of impact magnet convex rails based on total integrated field residual ratio closed loop optimization according to claim 1, wherein the long integrated coil and the integrator collect total integrated field signals and process output waveforms of the integrator to calculate an actual measured total integrated field, and the method comprises the following steps: and carrying out baseline removal, zero point correction and smoothing filtering processing on the output waveform of the integrator, automatically determining an effective time window according to the arrival time of the pulse, extracting an output characteristic value of the integrator, and converting the characteristic value into an actually measured total integrated field according to a pre-established calibration coefficient, wherein the characteristic value is any one of a peak value, an average value in the time window or a reference time amplitude.
6. The method for off-line debugging of the convex tracks of the plurality of impact magnets based on total integrated field residual ratio closed loop optimization according to claim 1, wherein the debugging parameters comprise trigger delay and pulse current peak value of an impact magnet excitation power supply switching tube, and the debugging parameter correction quantity is calculated according to the product of the residual ratio and a preset debugging proportional coefficient, and the excitation current correction quantity and the trigger delay correction quantity are respectively generated correspondingly.
7. The method for off-line debugging of the convex rails of the plurality of impact magnets based on the closed loop optimization of the total integrated field residual ratio according to claim 1 is characterized in that the residual ratio is calculated according to the system design closing condition and the reference standard, and the specific method is as follows: The reference total integral field is obtained through an actual measurement method or a theoretical calculation method, and the ratio of the actual measurement total integral field obtained in the second step to the reference total integral field is defined as a residual ratio to be used for representing the quality of a closed track formed by the combined actions of the trigger time sequence errors, the installation deviation, the pulse waveform differences, the integrator sampling link errors and the synthetic deflection errors of the plurality of impact magnets in the combined working state.
8. The method for offline debugging of the plurality of impact magnet convex rails based on total integrated field residual ratio closed loop optimization according to claim 1, wherein the preset threshold is determined according to a storage ring local convex rail closing error requirement, and specifically corresponds to a preset allowable value of beam current rail deviation, when the storage ring closed rail requirement error of the convex rail system is smaller than or equal to the preset allowable value, the corresponding residual ratio threshold is determined according to the allowable value, and when the residual ratio is smaller than or equal to the threshold, the local convex rail closing quality in the current combined state of the plurality of impact magnets is considered to meet the offline debugging requirement.
9. The method for offline debugging of the plurality of impact magnet convex rails based on total integrated field residual ratio closed loop optimization according to claim 8 is characterized by comprising the specific steps of determining a maximum deviation value of a beam track deflection angle allowed by a local convex rail closed rail according to a design index of a storage ring, taking the maximum deviation value as the preset deviation value of the beam track deflection angle, combining a linear association relation between the beam deflection angle and an integral field, converting the determined preset deviation value of the beam track deflection angle into a corresponding integral field tolerance deviation value, obtaining the integral field sum generated by the plurality of impact magnets at an actual working point, and taking the ratio of the integral field tolerance deviation value to the integral field sum as the preset threshold of the residual ratio.
10. The method for off-line debugging of the convex rails of the plurality of impact magnets based on the total integrated field residual ratio closed loop optimization according to claim 1 is characterized in that the closed loop optimization in the third step is an adaptive iterative correction process based on the residual ratio, and the debugging parameter correction amount obtained by calculation according to the residual ratio is completed each time until the residual ratio is not more than a preset threshold value.

Description

Off-line debugging method for convex rails of multiple impact magnets based on total integrated field residual ratio closed-loop optimization Technical Field The invention belongs to the technical field of pulsed magnet magnetic field measurement and debugging, and particularly relates to a method for offline debugging of convex rails of a plurality of impact magnets based on total integrated field residual ratio closed loop optimization. Background The beam injection can be realized in the storage ring by the convex rail injection method, the basic principle of the convex rail injection is that electrons to be injected enter the convex rail formed by the impact magnet through deflection of the cutting magnet, meanwhile, the impact magnet gradually reduces according to a certain time rule, so that the convex rail is close to the balance rail, the incident particles return to the initial injection point position again after passing a plurality of circles, the shrinkage of the convex rail is enough, and the injected particles can be captured by the storage ring while avoiding the cutting plate, thereby realizing the beam injection. If the deviation of the closed track formed by the impact magnets is large, the beam cannot return to the storage ring track, so that the beam oscillation and even the beam loss are caused, and therefore, the quality of the closed track formed by the impact magnets is particularly important. At present, the quality of a closed track formed by a plurality of impact magnets is evaluated by measuring pulse magnetic fields formed by single impact magnets respectively, and analyzing indexes such as time jitter, amplitude stability and the like of an excitation pulse power supply. The method has the following defects that firstly, single integrated field information is obtained by measuring single magnets respectively, the synthetic effect of three impact magnets in real work is difficult to directly represent, secondly, trigger time sequence errors, installation deviation, pulse waveform differences and integrator/sampling link errors among the impact magnets can jointly act in a synthetic state, theoretical superposition is carried out after the measurement respectively, the coupling errors cannot be truly reflected, thirdly, whether a local convex rail meets the closing requirement is basically determined by the residual quantity of the total deflection effect on a beam current rail, and the system combination can be ensured to meet the requirement instead of the fact that the single magnets meet indexes respectively. Therefore, this method is relatively error-intensive and cannot fully evaluate the closed-track quality condition. Therefore, a method for offline debugging of multiple impact magnet convex rails based on total integrated field residual ratio closed loop optimization is needed to solve the above problems. Disclosure of Invention The invention aims to provide a method for offline debugging of convex rails of a plurality of impact magnets based on total integrated field residual ratio closed loop optimization, which is used for solving the technical problems that in the prior art, the quality evaluation of closed rails formed by a plurality of impact magnets is not direct enough and the combination error cannot be fully reflected. In order to achieve the above purpose, the present invention adopts the following technical scheme: A method for offline debugging of convex rails of a plurality of impact magnets based on total integrated field residual ratio closed loop optimization comprises the following steps: Arranging a long integral coil along the beam nominal track direction, enabling the long integral coil to sequentially penetrate through the effective magnetic field areas of a plurality of impact magnets, enabling the transverse reference positions of the coil in each magnet to be consistent and located at the corresponding position of a stored beam design track, enabling coil end loops and bending parts to be distributed outside the edge field of the outermost impact magnet, and enabling the effective length of the coil to cover all measurement areas from the first impact magnet to the last impact magnet; step two, connecting a long integral coil with an integrator to finish measurement link calibration, driving a plurality of impact magnets to work simultaneously according to set triggering conditions, collecting total integral field signals through the long integral coil and the integrator, and processing output waveforms of the integrator to calculate an actually measured total integral field; And thirdly, calculating a residual ratio according to a system design closing condition and a reference standard, comparing the residual ratio with a preset threshold value, automatically calculating a debugging parameter correction amount according to the residual ratio and adjusting an impact magnet driving parameter to form closed loop optimization if the residual ratio