Tuning Method, Terminal and Medium of Radio Frequency Accelerator

Abstract

The present invention provides a tuning method, a terminal and a medium for a radio frequency accelerator. The method includes: constructing a tuning coefficient based on the ratio between the first electric field influence factor and the second electric field influence factor; synchronously adjusting the insertion depths of the first tuner and the second tuner according to the tuning coefficient based on the frequency adjustment amount of the radio frequency accelerator, so that the radio frequency accelerator frequency reaches the target frequency. The present application can accurately and conveniently implement the tuning process of the tuner, greatly improving the tuning efficiency of the radio frequency accelerator and effectively improving the overall tunability of the accelerator.

Description

Technical Field

[0001] The present invention belongs to the technical field of tuning, and in particular relates to a tuning method, a terminal and a computer storage medium for a radio frequency accelerator. Background Art

[0002] A radio frequency accelerator is a device that accelerates charged particles using a radio frequency electric field. It forms a radio frequency electric field in a specific acceleration structure, enabling charged particles to obtain energy under the action of the electric field, thereby increasing their speed and kinetic energy. For existing radio frequency accelerators, due to errors that often occur during production and assembly, there will be a deviation between the actual value and the theoretical value of the resonant frequency formed during the operation of the accelerator.

[0003] To reduce the above-mentioned deviation existing in the radio frequency accelerator, a tuner is often provided in the existing radio frequency accelerator; by adjusting the insertion depth of the tuner, the tuning of the resonant frequency in the accelerator cavity is achieved; however, for a radio frequency accelerator with a coupled acceleration structure, since the tuners of each resonant cavity in the radio frequency accelerator will affect both the frequency distribution and the electric field distribution of the total cavity; specifically, when adjusting the insertion depth of the tuner of a single resonant cavity, it will not only affect the resonant frequency of the total cavity, but also affect the electric field uniformity, causing the electric field flatness of the total cavity to deviate, making the entire tuning process often require multiple adjustments of the insertion depth of the tuners in each cavity, resulting in the entire tuning process being not only complex but also having a low tuning efficiency, and consuming a large amount of time and manpower.

[0004] Therefore, how to improve the tuning convenience and tuning efficiency of a radio frequency accelerator with a coupled acceleration structure has become a technical problem to be solved in this field. Summary of the Invention

[0005] In view of the above-mentioned disadvantages existing in the prior art, the purpose of the present invention is to provide a tuning method, a terminal and a computer storage medium for a radio frequency accelerator, which are used to solve the problems of inconvenient tuning efficiency and low tuning efficiency of existing accelerators.

[0006] To achieve the above purpose and other related purposes, the present invention provides a tuning method for a radio frequency accelerator in a first aspect. The radio frequency accelerator includes a first resonant cavity and a second resonant cavity that are coupled, and corresponding tuners are respectively provided in each of the resonant cavities; the tuning method of the radio frequency accelerator includes:

[0007] Obtain the first tuning radius corresponding to the first tuner and the second tuning radius corresponding to the second tuner when the unit tuning capabilities are the same; extract the first electric field influence factor of the first tuner at the first tuning radius and the second electric field influence factor of the second tuner at the second tuning radius; construct a tuning coefficient based on the ratio between the first electric field influence factor and the second electric field influence factor; synchronously adjust the insertion depths of the first tuner and the second tuner according to the tuning coefficient so that the radio frequency accelerator frequency reaches the target frequency.

[0008] In one embodiment, the implementation manner of synchronously adjusting the insertion depths of the first tuner and the second tuner according to the tuning coefficient includes:

[0009] Obtain the unit tuning capability; based on the frequency adjustment amount of the radio frequency accelerator and the unit tuning capability, obtain the total depth adjustment amount; based on the tuning coefficient and in combination with the total depth adjustment amount, respectively obtain the depth adjustment amount corresponding to the first tuner and the depth adjustment amount corresponding to the second tuner, which are respectively:

[0010] L1 = Q * a / (a - 1) * W

[0011] L2 = Q * 1 / (a - 1) * W

[0012] Wherein, L1 is the depth adjustment amount corresponding to the first tuner; L2 is the depth adjustment amount corresponding to the second tuner; a is the tuning coefficient; W is the unit tuning capability; Q is the frequency adjustment amount.

[0013] In one embodiment, the implementation manner of extracting the first electric field influence factor of the first tuner at the first tuning radius is the same as the implementation manner of extracting the first electric field influence factor of the first tuner at the first tuning radius, and includes:

[0014] Take one of the first tuner and the second tuner as the current tuner and fix the insertion depth of the other tuner; for the current tuner, respectively obtain the electric field uniformity coefficients corresponding to the total cavity at several different insertion depths; based on the different insertion depths and the corresponding electric field uniformity coefficients, adopt a linear fitting method to construct a relationship curve between the electric field uniformity coefficient and the insertion depth under the current tuner; extract the slope corresponding to this relationship curve as the electric field influence factor corresponding to the current tuner.

[0015] In one embodiment, the obtaining manner of the electric field uniformity coefficient includes:

[0016] Obtain the voltage distribution corresponding to each of the resonant cavities; based on the voltage distributions of the resonant cavities, construct a coefficient characterizing the difference in voltage distributions between the resonant cavities as the electric field uniformity coefficient.

[0017] In one embodiment, the method for obtaining the first tuning radius and the second tuning radius includes:

[0018] Obtain the unit tuning capabilities corresponding to the first tuner and the second tuner respectively at the same reference radius; when it is detected that the unit tuning capabilities of the two are different, adjust the tuning radius of the tuner to make the unit tuning capabilities corresponding to the first tuner and the second tuner the same; wherein, the reference radius is a preset tuner radius.

[0019] In one embodiment, the method for adjusting the tuning radius of the tuner includes:

[0020] Take one of the first tuner and the second tuner as the current tuner; obtain the unit tuning capability of the other tuner at the current radius; based on this unit tuning capability, combined with the mapping relationship between the unit tuning capability and the tuning radius corresponding to the current tuner, extract the radius corresponding to the current tuner when it reaches this unit tuning capability as the tuning radius of the current tuner; wherein, the mapping relationship is used to characterize the variation characteristics of the unit tuning capability of the tuner with the change of the tuning radius.

[0021] In one embodiment, the method for obtaining the mapping relationship includes:

[0022] Obtain the unit tuning capabilities respectively corresponding to the current tuner at a plurality of different tuning radii; based on the different tuning radii and the unit tuning capabilities corresponding to the tuning radii, use the method of linear fitting to construct a fitting curve between the tuning radius and the unit tuning capability as the mapping relationship.

[0023] In one embodiment, the method for obtaining the reference radius includes:

[0024] Set a number of different tuning radii; at different tuning radii, obtain a sixth relationship curve between the total cavity frequency and the tuner insertion depth, and obtain a seventh relationship curve between the total cavity Q value and the tuner insertion depth; from the sixth relationship curve and the seventh relationship curve, extract the reference frequency and the reference Q value corresponding to different tuning radii at the same reference depth; wherein, the reference depth is any depth value not greater than the maximum insertion depth; for the same tuning radius, synthesize the reference frequency and the reference Q value corresponding to this tuning radius to obtain a synthesized value corresponding to this tuning radius; extract the maximum value among the synthesized values corresponding to each tuning radius, and use the tuning radius corresponding to this maximum value as the reference radius.

[0025] In one embodiment, the method for obtaining the maximum insertion depth includes:

[0026] Obtain the sixth relationship curve between the insertion depth of the tuner and the frequency; from each of the sixth relationship curves, extract the change turning point of the curve slope, and use the insertion depth corresponding to the change turning point as the maximum insertion depth corresponding to the sixth relationship curve; wherein, the change turning point is the curve point corresponding to the curve slope when the curve slope first becomes less than the slope threshold during the process of the curve slope changing from large to small.

[0027] In one embodiment, the method for obtaining the unit tuning ability includes:

[0028] Take one tuner as the current tuner and fix the insertion depth of the other tuner; for the current tuner, respectively obtain the frequencies corresponding to the total cavity at a number of different insertion depths; based on the different insertion depths and the corresponding frequencies, use the method of linear fitting to construct a relationship curve between the frequency and the insertion depth; extract the slope corresponding to this relationship curve as the unit tuning ability corresponding to the current tuner.

[0029] The present invention provides a terminal in a second aspect, including a processor and a memory, and the memory is communicatively connected to the processor; the memory is used for storing a computer program, and the processor is used for executing the computer program stored in the memory so that the terminal executes the tuning method of the radio frequency accelerator as described above arbitrarily.

[0030] The present invention provides a computer storage medium in a third aspect, on which a computer program is stored, and it is characterized in that when this program is executed by a processor, it implements the tuning method of the radio frequency accelerator as described above arbitrarily.

[0031] As described above, for the tuning method, terminal, and computer storage medium of the radio frequency accelerator provided by the present invention, when the unit tuning capabilities corresponding to the first tuner and the second tuner are the same, the first electric field influence factor corresponding to the first tuner is extracted, and the second electric field influence factor corresponding to the second tuner is extracted, so as to construct a tuning coefficient based on the first electric field influence factor and the second electric field influence factor; and, based on this tuning coefficient, synchronous depth adjustment is performed on the two tuners to achieve the frequency of the radio frequency accelerator reaching the target frequency, thereby accurately and conveniently realizing the tuning process of the tuner, greatly improving the tuning efficiency of the radio frequency accelerator, and effectively improving the overall tuning performance of the accelerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It shows a schematic structural diagram of the transverse cross-section of the accelerator in an embodiment of the present invention;

[0033] Figure 2 It shows a schematic structural diagram of the longitudinal cross-section of the accelerator in an embodiment of the present invention;

[0034] Figure 3 It shows a schematic flowchart of the tuning method of the radio frequency accelerator in the present invention in an embodiment;

[0035] Figure 4 It shows a schematic flowchart of the obtaining method of the first tuning radius and the second tuning radius in the present invention in an embodiment;

[0036] Figure 5 It shows a schematic flowchart of the obtaining method of the first tuning radius and the second tuning radius in the present invention in another embodiment;

[0037] Figure 6 It shows an example diagram of the unit tuning capabilities of the first tuner and the second tuner in the present invention at the same tuning radius (45 mm);

[0038] Figure 7 It shows an example diagram of the first relationship curve between the first tuning radius and the unit tuning capability of the first tuner in the present invention;

[0039] Figure 8 It shows a schematic flowchart of the execution manner of step S200 in the present invention in an embodiment;

[0040] Figure 9 It shows a schematic diagram of the fourth relationship curve and the fifth relationship curve in the present invention in an embodiment;

[0041] Figure 10 It shows a schematic flowchart of the execution manner of step S300 in the present invention in an embodiment;

[0042] Figure 11 It shows a schematic flow chart of the acquisition method of the reference radius described in the present invention in an embodiment;

[0043] Figure 12 It shows a schematic diagram of the sixth relationship curve described in the present invention in an embodiment;

[0044] Figure 13 It shows a schematic diagram of the seventh relationship curve described in the present invention in an embodiment;

[0045] Figure 14 It shows a schematic flow chart of the acquisition method of the maximum insertion depth described in the present invention in an embodiment;

[0046] Figure 15 It shows a schematic flow chart of the extraction method of the change turning point described in the present invention in an embodiment;

[0047] Figure 16 It shows a schematic structural diagram of the terminal described in the present invention in an embodiment.

[0048] Explanation of reference numerals

[0049] 10 - First resonant cavity; 20 - Second resonant cavity; 30 - Coupling unit; 40 - Tuning channel; 50 - Electronic terminal; 51 - Processor; 52 - Memory; 53 - Network interface; 54 - User interface; 55 - Bus system; 521 - Operating system; 522 - Application program. Detailed implementation manners

[0050] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0051] It should be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of the present invention. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The types, quantities, and proportions of the components in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0052] The Q value, that is, the quality factor of the accelerator (Quality Factor), is a dimensionless parameter used to measure the loss of the resonant circuit.

[0053] For a radio frequency accelerator with a non-coupled acceleration structure, the change in the insertion depth of the tuner will not cause an obvious change in the electric field distribution in the total cavity; however, for a radio frequency accelerator with a coupled acceleration structure, when the insertion depth of the tuner changes, the local frequency changes in the front and rear cavities in the coupled structure will cause changes in the electric field distributions in the front and rear partial cavities, thereby distorting the field flatness; therefore, when performing frequency tuning processing using the existing radio frequency accelerator tuning method, it is necessary to adjust the insertion depth of the tuner in the radio frequency accelerator multiple times, resulting in problems such as a complex and inefficient tuning process. The tuning method, terminal, and computer storage medium of the radio frequency accelerator provided in this application construct a tuning coefficient for characterizing the difference in the influence intensity of the first tuner and the second tuner on the electric field distribution in the total cavity, and based on this tuning coefficient, perform synchronous depth adjustment on the two tuners to achieve the target frequency of the radio frequency accelerator, thereby accurately and conveniently realizing the tuning process of the tuner and greatly improving the tuning efficiency of the accelerator.

[0054] Among them, the radio frequency accelerator (hereinafter referred to as "accelerator" for short) is an accelerator using a coupled acceleration structure. The radio frequency accelerator includes a first resonator and a second resonator that are coupled, and corresponding tuners are provided in each of the resonators.

[0055] For the convenience of understanding the technical solution, the structure of the accelerator will be described below. Please refer to Figure 1 and 2 , which shows the structural schematic diagram of the accelerator in the embodiment of the present application; among them, Figure 1 is the structural schematic diagram of the transverse cross-section (parallel to the beam direction) of the accelerator; Figure 2 is the structural schematic diagram of the longitudinal cross-section (perpendicular to the beam direction) of the accelerator.

[0056] As Figure 1 and Figure 2 shown, the accelerator includes: a first resonator (hereinafter referred to as "first cavity") 10, a second resonator (hereinafter referred to as "second cavity") 20, and a coupling unit 30; the coupling unit 30 is arranged between the first cavity 10 and the second cavity 20, and the two ends are respectively correspondingly coupled to the first cavity 10 and the second cavity 20 to form a total acceleration cavity (hereinafter referred to as "total cavity").

[0057] The coupling unit 30 and the first cavity 10 and the second cavity 20 are coaxially arranged to form a total cavity for accelerating the particle beam.

[0058] In the shells of the first cavity 10 and the second cavity 20, an even number of tuning channels 40 are provided in the circumferential direction; each tuning channel 40 extends radially, and two of the tuning channels 40 arranged facing each other form a tuning channel group to achieve balanced adjustment of the frequency distribution in the cavity; a tuner (not labeled) is arranged in each tuning channel 40, that is, a first tuner is inserted into each tuning channel of the first cavity 10, and a second tuner is inserted into each tuning channel of the second cavity 20; and in the first cavity 10, the insertion depths of all the first tuners are the same, and in the second cavity 20, the insertion depths of all the second tuners are also the same, so as to effectively improve the tuning efficiency of the tuners corresponding to each cavity.

[0059] It should be noted that the arrangement mode of each tuning channel in the circumferential direction in the first cavity and the arrangement mode of each tuning channel in the circumferential direction in the second cavity may be the same or different, and no specific limitation is made here.

[0060] Please refer to Figure 3 , which shows a schematic flow chart of the tuning method of the radio frequency accelerator provided by the present invention in an embodiment; as Figure 3 shown, the method includes the following steps:

[0061] S100, when the unit tuning ability is the same, obtain the first tuning radius corresponding to the first tuner and the second tuning radius corresponding to the second tuner;

[0062] In the present application, when the tuning radius of the first tuner reaches the first tuning radius, it has a first unit tuning ability; similarly, when the tuning radius of the second tuner reaches the second tuning radius, it has a second unit tuning ability, and the first unit tuning ability and the second unit tuning ability are the same.

[0063] Wherein, the unit tuning ability is the influence intensity of the change in the insertion depth of a single-sided tuner on the frequency change in the total cavity of the accelerator (the insertion depth of the other tuner is fixed); that is, the unit tuning ability of the first tuner is the influence intensity of the change in the insertion depth of the first tuner on the frequency change in the total cavity when the insertion depth of the second tuner is fixed at an insertion depth; similarly, the unit tuning ability of the second tuner is the influence intensity of the change in the insertion depth of the second tuner on the frequency change in the total cavity when the insertion depth of the first tuner is fixed at an insertion depth.

[0064] In an optional embodiment, the obtaining method of the first tuning radius and the second tuning radius is as Figure 4 shown, and includes:

[0065] S101, determine the unit tuning ability;

[0066] Exemplarily, the unit tuning ability is a preset value;

[0067] S102. Based on the unit tuning ability, in combination with the first mapping relationship between the unit tuning ability and the tuning radius corresponding to the first tuner, extract the radius corresponding to the first tuner when it reaches this unit tuning ability as the first tuning radius of the first tuner;

[0068] S103. Based on the unit tuning ability, in combination with the second mapping relationship between the unit tuning ability and the tuning radius corresponding to the second tuner, extract the radius corresponding to the second tuner when it reaches this unit tuning ability as the second tuning radius of the second tuner.

[0069] Wherein, the mapping relationship is used to characterize the variation characteristics of the unit tuning ability of the tuner with the change of the tuning radius, including but not limited to a mapping table or a relationship curve.

[0070] In another alternative embodiment, the obtaining methods of the first tuning radius and the second tuning radius are as Figure 5 shown and include:

[0071] S101'. Respectively obtain the unit tuning abilities corresponding to the first tuner and the second tuner at the same reference radius;

[0072] Wherein, the reference radius is a preset tuner radius;

[0073] S102'. Detect whether the unit tuning abilities of the two are the same. When it is detected that they are different, adjust the tuning radius of the tuner to make the unit tuning abilities corresponding to the first tuner and the second tuner the same;

[0074] Specifically, when it is detected that the unit tuning abilities of the first tuner and the second tuner are different, obtain the unit tuning ability of the second tuner at the current radius; based on this unit tuning ability, in combination with the first mapping relationship between the unit tuning ability and the tuning radius corresponding to the first tuner, extract the radius corresponding to the first tuner when it reaches this unit tuning ability as the first tuning radius of the first tuner;

[0075] Or, obtain the unit tuning ability of the first tuner at the current radius; based on this unit tuning ability, in combination with the second mapping relationship between the unit tuning ability and the tuning radius corresponding to the second tuner, extract the radius corresponding to the second tuner when it reaches this unit tuning ability as the second tuning radius of the second tuner.

[0076] In an alternative embodiment, the mapping relationship is a relationship curve, that is, the first mapping relationship is a first relationship curve, and the second mapping relationship is a second relationship curve. Taking the first relationship curve corresponding to the first tuner as an example, the method for obtaining the relationship curve includes:

[0077] Fix the radius of the second tuner;

[0078] Obtain the unit tuning capabilities respectively corresponding to the first tuner at several different tuning radii;

[0079] Based on the different tuning radii and the unit tuning capabilities corresponding to the tuning radii, use the method of linear fitting to construct a fitting curve between the two as the first relationship curve.

[0080] In an alternative embodiment, for a single tuner, the method for obtaining the corresponding unit tuning capability includes:

[0081] Fix the insertion depth in another tuner;

[0082] Using the simulation method, obtain the cavity frequency of the accelerator total cavity corresponding to the current tuner at several different insertion depths; based on the different insertion depths and the corresponding cavity frequencies, use the method of linear fitting to construct a third relationship curve between the cavity frequency and the insertion depth;

[0083] Extract the slope corresponding to the third relationship curve and use this slope as the unit tuning capability corresponding to the current tuner.

[0084] Wherein, the simulation method includes the method of performing simulation calculations on the accelerator using a simulation platform; then for a single insertion depth, the implementation manner of obtaining the cavity frequency of the current tuner at this insertion depth using the simulation method is to input the insertion depth of the tuner into the simulation platform and use the simulation platform to simulate and calculate the frequency of the accelerator total cavity at this insertion depth.

[0085] Exemplarily, the simulation platform is CST software.

[0086] Exemplarily, the unit tuning capabilities of the first tuner and the second tuner at the same tuning radius (45 mm) are as Figure 6 shown; wherein, the unit tuning capability of the first tuner is the slope of the third relationship curve corresponding to the first tuner, which is 11.6 kHz / mm; the unit tuning capability of the second tuner is the slope of the third relationship curve corresponding to the second tuner, which is 17.3 kHz / mm.

[0087] When it is detected that the unit tuning capabilities of the first tuner and the second tuner are different, fix the tuning radius of the second tuner at 45 mm, and construct a first relationship curve between the first tuning radius of the first tuner and the unit tuning capability as shown in Figure 7 shown; as shown by Figure 7 shown, as the first tuning radius increases, the corresponding unit tuning capability also gradually increases; when the radius is 51.3 mm, the corresponding unit tuning capability is 17.3 kHz / mm, that is, when the radius of the second tuner is 45 mm and the first tuning radius of the first tuner is 51.3 mm, the corresponding unit tuning capabilities of the two are the same.

[0088] S103’, when the unit tuning capabilities of the two are the same, extract the current tuning radius of the first tuner as the first tuning radius; and extract the current tuning radius of the second tuner as the second tuning radius.

[0089] It should be noted that in this application, the first tuning radius of the first tuner and the second tuning radius of the second tuner are the radius values corresponding to each tuner when the unit tuning capabilities of the two are the same; based on this, there can be multiple sets of numerical correspondence relationships between the first tuning radius of the first tuner and the second tuning radius of the second tuner, rather than being limited to only one set of numerical correspondence relationships, that is, when the first tuning radius is R11, the second tuning radius is R21, when the first tuning radius is R12, the second tuning radius is R22, and so on.

[0090] S200, extract the first electric field influence factor of the first tuner at the first tuning radius, and extract the second electric field influence factor of the second tuner at the second tuning radius; set the ratio between the first electric field influence factor and the second electric field influence factor as the tuning coefficient;

[0091] Among them, the electric field influence factor is the influence intensity of the change in the insertion depth of a single-sided tuner on the uniformity of the electric field in the accelerator total cavity (the insertion depth of the other tuner is fixed); that is, the first electric field influence factor is the influence intensity of the change in the insertion depth of the first tuner on the uniformity of the electric field in the total cavity (the insertion depth of the second tuner is fixed); similarly, the second electric field influence factor is the influence intensity of the change in the insertion depth of the second tuner on the uniformity of the electric field in the total cavity (the insertion depth of the first tuner is fixed).

[0092] Correspondingly, the tuning coefficient is used to characterize the difference in the influence intensity of the first tuner and the second tuner on the electric field distribution in the total cavity.

[0093] In this embodiment, the degree of electric field uniformity is used to characterize the uniformity / difference degree of the electric field characteristics between the resonators; the electric field characteristics include, but are not limited to, electric field physical distribution characteristics such as voltage distribution and electric field intensity distribution.

[0094] Specifically, the degree of electric field uniformity is characterized by a pre-constructed electric field uniformity coefficient. Then, the execution manner of step S200 is as Figure 8 shown and includes:

[0095] S201, take one of the first tuner and the second tuner as the current tuner, and fix the insertion depth of the other tuner;

[0096] S202, for the current tuner, respectively obtain the electric field uniformity coefficients corresponding to the total cavity at several different insertion depths;

[0097] S203, based on the different insertion depths and the corresponding electric field uniformity coefficients, use the method of linear fitting to construct a relationship curve between the electric field uniformity coefficient and the insertion depth under the current tuner;

[0098] S204, extract the slope corresponding to this relationship curve as the electric field influence factor corresponding to the current tuner.

[0099] More specifically, take the first tuner as the current tuner and fix the insertion depth of the second tuner; for the first tuner, respectively obtain the electric field uniformity coefficients corresponding to the total cavity at several different insertion depths; based on the different insertion depths and the corresponding electric field uniformity coefficients, use the method of linear fitting to construct a fourth relationship curve between the electric field uniformity coefficient and the insertion depth under the first tuner; extract the slope corresponding to this fourth relationship curve as the first electric field influence factor;

[0100] Similarly, take the second tuner as the current tuner and fix the insertion depth of the first tuner; for the second tuner, respectively obtain the electric field uniformity coefficients corresponding to the total cavity at several different insertion depths; based on the different insertion depths and the corresponding electric field uniformity coefficients, use the method of linear fitting to construct a fifth relationship curve between the electric field uniformity coefficient and the insertion depth under the second tuner; extract the slope corresponding to this fifth relationship curve as the second electric field influence factor.

[0101] After obtaining the first electric field influence factor and the second electric field influence factor, set the ratio between the two as the tuning coefficient.

[0102] Exemplarily, the insertion depth of the fixed second tuner is 75 mm. By adjusting the insertion depth of the first tuner, the electric field uniformity coefficients corresponding to different insertion depths are extracted to construct a fourth relationship curve of the insertion depth of the first tuner versus the electric field uniformity coefficient; and similarly, the insertion depth of the first tuner is fixed at 75 mm. By adjusting and analyzing the insertion depth of the second tuner, the electric field uniformity coefficients corresponding to different insertion depths are extracted to construct a fifth relationship curve of the insertion depth of the second tuner versus the electric field uniformity coefficient; the constructed fourth relationship curve and fifth relationship curve are specifically as Figure 9 shown; it can be seen from Figure 9 that the first electric field influence factor corresponding to the fourth relationship curve is 0.004, and the second electric field influence factor corresponding to the fifth relationship curve is 0.0048; based on the first electric field influence factor and the second electric field influence factor, the tuning coefficient is determined to be 1:1.2.

[0103] S300, synchronously adjust the insertion depths of the first tuner and the second tuner according to the tuning coefficient so that the frequency of the accelerator reaches the target frequency.

[0104] Specifically, obtain the current first insertion depth of the first tuner and obtain the current second insertion depth of the second tuner;

[0105] Adjust the insertion depth values of the first insertion depth and the second insertion depth; during the adjustment process, make the ratio between the adjustment amount of the first insertion depth and the adjustment amount of the second insertion depth the same as the value of the tuning coefficient, so that the depth adjustment process of the first tuner and the second tuner is a synchronous adjustment that conforms to the tuning coefficient.

[0106] Exemplarily, when the tuning coefficient is 1:1.2, when the insertion depth of the second tuner is reduced by 1 mm, correspondingly, the insertion depth of the first tuner is increased by 1.2 mm to ensure that during the frequency adjustment process, the electric field uniformity of the cavity will not change due to the change in the insertion depth of the tuner.

[0107] The tuning method of the radio frequency accelerator provided in this embodiment constructs a tuning coefficient that can reflect the difference in the influence intensity of the first tuner and the second tuner on the electric field distribution in the total cavity, and based on this tuning coefficient, synchronously adjusts the insertion depths of the first tuner and the second tuner. While realizing the adjustment of the frequency of the accelerator's total cavity, it ensures that the electric field uniformity in the accelerator's total cavity remains unchanged, thereby greatly reducing the complexity of the tuning process of the coupled structure radio frequency accelerator and effectively improving the tuning efficiency.

[0108] To improve the efficiency of accelerator frequency adjustment and enable the accelerator frequency to be adjusted to the target frequency more quickly and accurately, in some alternative embodiments, when the step S300 is executed as Figure 10 shown, it includes:

[0109] S301, obtaining the unit tuning ability of the tuner and obtaining the frequency adjustment amount of the accelerator;

[0110] Wherein, the unit tuning ability may be the unit tuning ability corresponding to the first tuner or the unit tuning ability corresponding to the second tuner, and the two are the same;

[0111] S302, based on the frequency adjustment amount of the accelerator, combining the unit tuning ability and the tuning coefficient, obtaining the depth adjustment amount corresponding to the first tuner and the depth adjustment amount corresponding to the second tuner.

[0112] Specifically, after determining the unit tuning ability, based on the frequency adjustment amount of the accelerator and the unit tuning ability, obtain the total depth adjustment amount; based on the tuning coefficient, combine the total depth adjustment amount to respectively obtain the depth adjustment amount L1 corresponding to the first tuner and obtain the depth adjustment amount L2 corresponding to the second tuner, which is:

[0113] L1 = M * a / (a - 1) * W

[0114] L2 = M * 1 / (a - 1) * W

[0115] Wherein, L1 is the depth adjustment amount corresponding to the first tuner; L2 is the depth adjustment amount corresponding to the second tuner; a is the tuning coefficient; W is the unit tuning ability; M is the frequency adjustment amount of the accelerator.

[0116] In this embodiment, by obtaining the unit tuning ability of the tuner, based on this unit tuning ability, the tuning coefficient, and combining the frequency adjustment amount to be adjusted by the accelerator, that is, according to the mathematical relationship among the three, the depth adjustment amount corresponding to each tuner can be quickly obtained, thereby effectively improving the adjustment efficiency of the target frequency.

[0117] It should be noted that in another embodiment, the step S300 can also adopt an adjustment method of gradually approaching, that is, when the step S300 is executed, it can also:

[0118] Set a first depth adjustment step corresponding to the first tuner and set a second depth adjustment step corresponding to the second tuner; wherein, the ratio between the first depth adjustment step and the second depth adjustment step is the same as the value of the tuning coefficient;

[0119] Adjust the first insertion depth of the first tuner based on the first depth adjustment step to obtain a new first insertion depth; and adjust the second insertion depth of the second tuner based on the second depth adjustment step to obtain a new second insertion depth;

[0120] Obtain the current frequency of the total cavity of the accelerator, and detect whether the frequency reaches the target frequency. If so, exit the frequency adjustment process; if not, continue to execute step S300; repeat this process until the frequency of the total cavity of the accelerator reaches the target frequency.

[0121] It should be noted that in this embodiment, before adjusting the insertion depth of the tuner, it is necessary to determine the tuner with the insertion depth to be increased and the tuner with the insertion depth to be decreased according to the positive or negative of the frequency adjustment amount; that is, since the depth adjustment amount of the first tuner is positively correlated with the total cavity frequency, and the depth adjustment amount of the second tuner is negatively correlated with the total cavity frequency, when the target frequency is greater than the current frequency (the frequency adjustment amount is positive), the first tuner is set as the tuner with the insertion depth to be increased, and the second tuner is set as the tuner with the insertion depth to be decreased; on the contrary, when the target frequency is less than the current frequency (the frequency adjustment amount is negative), the second tuner is set as the tuner with the insertion depth to be increased, and the first tuner is set as the tuner with the insertion depth to be decreased.

[0122] Since the electric field influence factor is closely related to the electric field uniformity in the total cavity of the accelerator, the accuracy of obtaining the electric field uniformity will directly affect the accuracy of the electric field influence factor; in order to more efficiently and accurately evaluate the electric field uniformity of the resonant cavity, in some alternative embodiments, the method for obtaining the electric field uniformity coefficient includes:

[0123] Obtain the voltage distribution corresponding to each of the resonant cavities;

[0124] Based on the voltage distribution of each of the resonant cavities, construct a coefficient representing the voltage distribution difference between each of the resonant cavities as the electric field uniformity coefficient.

[0125] In an alternative embodiment, the electric field uniformity coefficient is the ratio of the voltage distributions between the resonant cavities, which is used to characterize the voltage difference degree between the resonant cavities; for example, the expression of the electric field uniformity coefficient is:

[0126]

[0127] where represents the electric field uniformity coefficient, represents the voltage distribution of the first resonant cavity C1, represents the voltage distribution of the second resonant cavity C2. The closer the value is to 1, the smaller the difference in voltage distribution of the resonant cavities is, that is, the more uniform the electric field distribution is; on the contrary, The greater the difference between the value and 1, the greater the difference in voltage distribution of the resonant cavities, that is, the worse the uniformity of the electric field distribution.

[0128] In another optional embodiment, the electric field uniformity is the difference in voltage distribution between the resonant cavities, so as to characterize the degree of voltage difference between the resonant cavities; illustratively, the expression of the electric field uniformity coefficient is:

[0129]

[0130] The closer the value is to 0, the smaller the difference in voltage distribution of the resonant cavities is, that is, the more uniform the distribution of electric field characteristics is; on the contrary, The greater the difference between the value and 0, the greater the difference in voltage distribution of the resonant cavities, that is, the worse the uniformity of the electric field characteristic distribution.

[0131] It should be noted that the voltage distribution mentioned above is a characteristic parameter used to characterize the concentration trend of voltage values ​​in the cavity; illustratively, the voltage distribution includes the voltage mean, median or other existing characteristic values ​​that characterize the concentration trend of values.

[0132] A plurality of accelerating gaps are arranged in a single resonant cavity. In order to more accurately and objectively characterize the voltage distribution corresponding to each resonant cavity, the voltage distribution of the resonant cavity is obtained by:

[0133] Based on the structural parameters corresponding to each accelerating gap, obtaining the accelerating voltage corresponding to each accelerating gap;

[0134] Specifically, the structural parameters corresponding to each acceleration gap in the resonant cavity are obtained; the structural parameters corresponding to each acceleration gap are input into an accelerator simulation platform, and the structural parameters are simulated and calculated on the simulation platform to obtain an acceleration voltage corresponding to the acceleration gap; illustratively, the simulation platform is CST software.

[0135] The structural parameters corresponding to the acceleration gap include drift tube length, acceleration gap length, acceleration cycle length, cavity radius, etc.

[0136] The accelerating voltages corresponding to the accelerating gaps in the resonant cavity are integrated to obtain the voltage distribution of the resonant cavity.

[0137] Specifically, for a single resonant cavity, after obtaining the acceleration voltages corresponding to the acceleration gaps in the resonant cavity, the acceleration voltages are averaged, and the voltage average is used as the voltage distribution corresponding to the current resonant cavity, that is:

[0138]

[0139] Among them, represents the average gap voltage of the I-th resonator cavity, represents the number of accelerating gaps in the I-th resonator cavity, represents the voltage value of the i-th accelerating gap.

[0140] It should be noted that the above content of this application exemplarily gives the specific acquisition method of the voltage distribution corresponding to each resonator cavity, but is not limited thereto, as long as the voltage distribution conditions for characterizing each resonator cavity can be obtained, for example, it can be obtained by direct calculation.

[0141] In an accelerator, the tuning radius of the tuner will affect accelerator physical field parameters such as the frequency field distribution, electric field distribution, and cavity Q value of the total cavity of the accelerator; specifically, as the radius of the tuner increases, the cavity frequency will increase accordingly, while the cavity Q value will decrease accordingly, and vice versa.

[0142] Based on this, during the accelerator tuning process, in order to comprehensively consider the influence of the radius of each tuner on physical field parameters such as cavity frequency and cavity Q, and make the accelerator have a better working state during the tuning process, in a specific embodiment, the acquisition method of the reference radius is as Figure 11 shown, including:

[0143] S801, set several different tuning radii;

[0144] S802, at different tuning radii, obtain the sixth relationship curve between the total cavity frequency and the tuner insertion depth, and obtain the seventh relationship curve between the total cavity Q value and the tuner insertion depth;

[0145] Among them, the sixth relationship curve is used to characterize the distribution characteristics of the frequency of the total cavity of the accelerator changing with the tuner insertion depth; the seventh relationship curve is used to characterize the distribution characteristics of the Q value of the total cavity of the accelerator changing with the tuner insertion depth;

[0146] In this embodiment, the tuner includes a first tuner and a second tuner, that is, the following same operations are performed on the first tuner and the second tuner, including:

[0147] For the tuner corresponding to a single tuning radius, obtain the frequency corresponding to the total cavity of the accelerator at different insertion depths; based on different insertion depths and the corresponding total cavity frequencies, use the linear fitting method to construct the sixth relationship curve between the total cavity frequency and the tuner insertion depth as the sixth relationship curve corresponding to the tuning radius.

[0148] Similarly, for the tuner corresponding to a single tuning radius, obtain the Q value corresponding to the total cavity of the accelerator at different insertion depths; based on the different insertion depths and the corresponding total cavity Q values, use the linear fitting method to construct the seventh relationship curve between the total cavity Q value and the tuner insertion depth as the seventh relationship curve corresponding to the tuning radius.

[0149] S803. Based on the sixth relationship curve and the seventh relationship curve, extract the reference frequencies and reference Q values corresponding to different tuning radii at the same reference depth;

[0150] wherein, the reference depth is any depth value within the maximum insertion depth range of the tuner; the maximum insertion depth is the depth corresponding to the maximum influence efficiency of the tuner insertion depth on the total cavity frequency.

[0151] In some alternative embodiments, the reference depth is half of the maximum tuning depth corresponding to the tuner, that is, when the maximum tuning depth is 150 mm, the reference depth is 75 mm.

[0152] S804. For the same tuning radius, use the weighting method to synthesize the reference frequency and reference Q value corresponding to the tuning radius to obtain the synthesized value corresponding to the tuning radius; extract the maximum value among the synthesized values corresponding to each tuning radius, and use the tuning radius corresponding to the maximum value as the reference radius.

[0153] Exemplarily, set the tuning radii r to 35 mm, 40 mm, 45 mm, and 50 mm respectively; for each tuning radius, construct the sixth relationship curve corresponding to the tuning radius as Figure 12 shown, and construct the seventh relationship curve corresponding to the tuning radius as Figure 13 shown; when the insertion depth is 75 mm, obtain the reference frequencies corresponding to different tuning radii respectively, which are: when the tuning radius r is 35 mm, the corresponding reference frequency is 166.197 MHz, and the Q value is 9994.069; when the tuning radius r is 40 mm, the corresponding reference frequency is 166.59 MHz, and the Q value is 9892.96; when the tuning radius r is 45 mm, the corresponding reference frequency is 167.027 MHz, and the Q value is 9817.7; when the tuning radius r is 50 mm, the corresponding reference frequency is 167.489 MHz, and the Q value is 9742.39.

[0154] For different tuning radii, perform weighted synthesis on the corresponding reference frequencies and reference Q values to obtain the synthesized values corresponding to different tuning radii. Based on this, determine that the reference radius is 45 mm.

[0155] In this embodiment, by comprehensively evaluating the reference frequency and reference Q value corresponding to different tuning radii, the tuning radius with the optimal comprehensive evaluation result is determined from the preset tuning radii according to the comprehensive evaluation result, thereby effectively improving the acquisition effect and acquisition efficiency of the reference radius.

[0156] To obtain the maximum insertion depth more quickly and accurately, in an optional embodiment, the method for obtaining the maximum insertion depth is as Figure 14 shown and includes:

[0157] S901, obtain the sixth relationship curve between the insertion depth and frequency of the tuner;

[0158] In this embodiment, the tuner includes a first tuner and a second tuner, that is, the same operations are performed on the first tuner and the second tuner.

[0159] Exemplarily, the tuning radii are respectively set to 35 mm, 40 mm, 45 mm, and 50 mm; for a single tuning radius, obtain the frequencies corresponding to different insertion depths; based on the different insertion depths and the corresponding frequencies, construct a linear distribution curve therebetween as the sixth relationship curve corresponding to the current tuning radius; perform this step for each of the tuning radii to obtain the sixth relationship curves corresponding to different tuning radii.

[0160] S902, in each of the sixth relationship curves, extract the change turning point of the curve slope, and use the insertion depth corresponding to the change turning point as the maximum insertion depth corresponding to the sixth relationship curve;

[0161] wherein, the change turning point is the curve point corresponding to when the curve slope is less than the slope threshold for the first time during the process of the curve slope changing from large to small.

[0162] Specifically, the method for extracting the change turning point is as Figure 15 shown and includes:

[0163] S902A, extract the slope corresponding to each insertion depth in the sixth relationship curve;

[0164] Specifically, based on a preset sampling interval, sample the insertion depth range of the tuner to obtain sampling points of the insertion depth; in the sixth relationship curve, extract the total cavity frequencies corresponding to each sampling point; based on the insertion depth value corresponding to each sampling point and the corresponding total cavity frequency, calculate the curve slope corresponding to the sampling point as the slope corresponding to the corresponding insertion depth.

[0165] S902B, perform slope change detection based on the slopes corresponding to each insertion depth to extract the change turning point of the slope;

[0166] Specifically, for each sampling point in the curve segment where the curve slope decreases from large to small, sequentially detect whether the curve slope corresponding to each sampling point is less than the slope threshold; when it is first detected that the curve slope is less than the slope threshold, use this sampling point as the change turning point.

[0167] In a specific embodiment, the slope threshold is set to 0, and for tuners with tuning radii r of 35 mm, 40 mm, 45 mm, and 50 mm, the corresponding sixth relationship curves are respectively constructed; see the constructed sixth relationship curves Figure 12 ; as Figure 10 can be seen, when the insertion depth of the tuner is 150 mm and the curve frequency is less than or equal to 0, based on this, the maximum insertion depth of 150 mm is obtained.

[0168] It should be noted that in each embodiment of the present application, the slope corresponding to each relationship curve is the slope corresponding to the fitting oblique line after linear fitting of the corresponding relationship curve; by way of example, the slope corresponding to the first relationship curve is the slope corresponding to the first fitting oblique line obtained after performing the first linear fitting on the first relationship curve; and so on. Those skilled in the art can know that as described above, the slope can also be the slope of the oblique line constructed by the two end points in the corresponding relationship curve, or the mean or median value of the tangent slopes corresponding to each curve point in the corresponding relationship curve.

[0169] Based on the same technical concept, the tuning method of the radio frequency accelerator provided in the above embodiments of the present invention can be implemented on the terminal side or the server side.

[0170] Please refer to Figure 10 , which is an optional hardware structure schematic diagram of the electronic terminal 50 provided in the embodiment of the present invention. The electronic terminal 50 can be a live machine, a camera, a mobile phone, a computer device, a tablet device, a personal digital processing device, a factory background processing device, etc. that integrates the functions of taking pictures / recording videos. The electronic terminal 50 includes: at least one processor 51, a memory 52, at least one network interface 53, and a user interface 54. Each component in the device is coupled together through a bus system 55. It can be understood that the bus system 55 is used to realize the connection and communication between these components. The bus system 55 includes, in addition to the data bus, a power bus, a control bus, and a status signal bus.

[0171] Among them, the user interface 54 can include a display, a keyboard, a mouse, a trackball, a click gun, a button, a button, a touchpad, or a touch screen, etc.

[0172] It can be understood that the memory 52 can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM, Read Only Memory), a programmable read-only memory (PROM, Programmable Read-Only Memory), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM, Static Random Access Memory), synchronous static random access memory (SSRAM, Synchronous Static Random Access Memory). The memory described in the embodiments of the present invention is intended to include but not limited to these and any other suitable categories of memories.

[0173] The memory 52 in the embodiments of the present invention is used to store various categories of data to support the operation of the electronic terminal 50. Examples of these data include: any executable programs for operation on the electronic terminal 50, such as the operating system 521 and application programs 522; the operating system 521 contains various system programs, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks. The application programs 522 can include various application programs, such as a media player (Media Player), a browser (Browser), etc., for implementing various application services. The tuning method of the radio frequency accelerator provided by the embodiments of the present invention can be included in the application programs 522.

[0174] The method disclosed in the above embodiments of the present invention can be applied to or implemented by the processor 51. The processor 51 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by the integrated logic circuit in the hardware of the processor 51 or by instructions in software form. The above-mentioned processor 51 can be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The processor 51 can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor 51 can be a microprocessor or any conventional processor, etc. Combining the steps of the accessory optimization method provided by the embodiments of the present invention can be directly embodied as being executed and completed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, and this storage medium is located in the memory. The processor reads the information in the memory and combines its hardware to complete the steps of the foregoing method.

[0175] In an exemplary embodiment, the electronic terminal 50 may be implemented by one or more application specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), or complex programmable logic devices (CPLDs) to execute the foregoing method.

[0176] It should be noted that the memory includes, but is not limited to, random access memory (RAM), and may also include non-volatile memory, such as at least one disk memory. Similarly, the processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0177] An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the program is called by a processor, the tuning method of the radio frequency accelerator is implemented.

[0178] Among them, the computer-readable storage medium may be a tangible device that can hold and store instructions used by an instruction execution device. The computer-readable storage medium may be, for example, (but not limited to) an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the above. More specific examples (non-exhaustive list) of the computer-readable storage medium include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disk read-only memory (CD-ROM), digital versatile disk (DVD), memory stick, floppy disk, and mechanical coding devices.

[0179] The computer-readable programs described herein can be downloaded from a computer-readable storage medium to various computing / processing devices, or downloaded to an external computer or external storage device through a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network adapter or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing / processing device.

[0180] In summary, the tuning method, terminal, and computer storage medium of the radio frequency accelerator provided by the present invention adjust the tuning radius of the tuner to make the unit tuning capabilities of the two tuners the same according to the difference in the unit tuning capabilities between the two tuners, so as to determine the final tuning radii corresponding to the first tuner and the second tuner; and, based on the final tuning radii of the first tuner and the second tuner, by obtaining the depth adjustment ratio between the first tuner and the second tuner, perform synchronous depth adjustment on the two tuners based on this depth adjustment ratio, thereby accurately and conveniently realizing the tuning process of the tuner, greatly improving the tuning efficiency of the accelerator; in addition, the method of the present invention can also be applied to accelerators with other coupling structures, and thus has high scalability and flexibility.

[0181] The above embodiments are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A tuning method for a radio frequency accelerator, characterized in that, The radio frequency accelerator includes a first resonator and a second resonator that are coupled and connected, and corresponding tuners are respectively provided in each resonator; The tuning method of the radio frequency accelerator includes: Obtaining a first tuning radius corresponding to the first tuner and a second tuning radius corresponding to the second tuner when the unit tuning capabilities are the same; Extracting a first electric field influence factor of the first tuner at the first tuning radius, and extracting a second electric field influence factor of the second tuner at the second tuning radius; Constructing a tuning coefficient based on the ratio between the first electric field influence factor and the second electric field influence factor; Synchronously adjusting the insertion depths of the first tuner and the second tuner according to the tuning coefficient so that the frequency of the radio frequency accelerator reaches the target frequency.

2. The tuning method of the radio frequency accelerator according to claim 1, characterized in that, The implementation manner of extracting the first electric field influence factor of the first tuner at the first tuning radius is the same as the implementation manner of extracting the second electric field influence factor of the second tuner at the second tuning radius, and includes: Taking one of the first tuner and the second tuner as the current tuner and fixing the insertion depth of the other tuner; For the current tuner, respectively obtaining the electric field uniformity coefficients corresponding to the total cavity at several different insertion depths; Based on the different insertion depths and the corresponding electric field uniformity coefficients, constructing a relationship curve between the electric field uniformity coefficient and the insertion depth under the current tuner by using linear fitting; Extracting the slope corresponding to this relationship curve as the electric field influence factor corresponding to the current tuner.

3. The tuning method of the radio frequency accelerator according to claim 2, characterized in that, The obtaining method of the electric field uniformity coefficient includes: Obtaining the voltage distribution corresponding to each resonator; Based on the voltage distributions of the respective resonators, constructing a coefficient representing the voltage distribution difference between the respective resonators as the electric field uniformity coefficient.

4. The tuning method of the radio frequency accelerator according to claim 1, wherein The obtaining method of the first tuning radius and the second tuning radius includes: Respectively obtaining the unit tuning capabilities corresponding to the first tuner and the second tuner at the same reference radius; When it is detected that the unit tuning capabilities of the two are different, adjusting the tuning radius of the tuner so that the unit tuning capabilities corresponding to the first tuner and the second tuner are the same; Wherein, the reference radius is a preset tuner radius.

5. The tuning method of the radio frequency accelerator according to claim 4, characterized in that, The adjusting method of the tuning radius of the tuner includes: Taking one of the first tuner and the second tuner as the current tuner; Obtaining the unit tuning capability of the other tuner at the current radius; Based on this unit tuning capability, combining the mapping relationship between the unit tuning capability and the tuning radius corresponding to the current tuner, extracting the radius corresponding to the current tuner when reaching this unit tuning capability as the tuning radius of the current tuner; wherein, the mapping relationship is used to characterize the variation characteristics of the unit tuning capability of the tuner with the change of the tuning radius.

6. The tuning method of the radio frequency accelerator according to claim 5, characterized in that, The obtaining method of the mapping relationship includes: Obtaining the unit tuning capabilities respectively corresponding to the current tuner at several different tuning radii; Based on different tuning radii and the corresponding unit tuning capabilities, a fitting curve between the tuning radius and the unit tuning capability is constructed by means of linear fitting as the mapping relationship.

7. The tuning method of the radio frequency accelerator according to claim 4, characterized in that, The method for obtaining the reference radius includes: Setting a number of different tuning radii; At different tuning radii, obtaining a sixth relationship curve between the total cavity frequency and the tuner insertion depth, and obtaining a seventh relationship curve between the total cavity Q value and the tuner insertion depth; From the sixth relationship curve and the seventh relationship curve, extracting the reference frequency and the reference Q value corresponding to different tuning radii at the same reference depth; wherein, the reference depth is any depth value not greater than the maximum insertion depth; For the same tuning radius, synthesizing the reference frequency and the reference Q value corresponding to this tuning radius to obtain a synthesized value corresponding to this tuning radius; Extracting the maximum value among the synthesized values corresponding to each tuning radius, and taking the tuning radius corresponding to this maximum value as the reference radius.

8. The tuning method of the radio frequency accelerator according to claim 7, characterized in that, The method for obtaining the maximum insertion depth includes: Obtaining the sixth relationship curve between the insertion depth of the tuner and the frequency; Among each of the sixth relationship curves, extracting the change turning point of the curve slope, and taking the insertion depth corresponding to the change turning point as the maximum insertion depth corresponding to the sixth relationship curve; Wherein, the change turning point is the curve point corresponding to when the curve slope is less than the slope threshold for the first time during the process of the curve slope changing from large to small.

9. The tuning method of the radio frequency accelerator according to any one of claims 1 to 8, characterized in that, The method for obtaining the unit tuning capability includes: Taking one tuner as the current tuner and fixing the insertion depth of the other tuner; For the current tuner, respectively obtaining the frequencies corresponding to the total cavity at a number of different insertion depths; based on the different insertion depths and the corresponding frequencies, constructing a relationship curve between the frequency and the insertion depth by means of linear fitting; extracting the slope corresponding to this relationship curve as the unit tuning capability corresponding to the current tuner.

10. A terminal, characterized in that, It includes a processor and a memory, and the memory is communicatively connected to the processor; the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory so that the terminal executes the tuning method of the radio frequency accelerator according to any one of claims 1 to 9.

11. A storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the tuning method of the radio frequency accelerator according to any one of claims 1 to 9.

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