CN114051309B - System and method for controlling radio frequency power and amplitude of particle accelerator - Google Patents
System and method for controlling radio frequency power and amplitude of particle accelerator Download PDFInfo
- Publication number
- CN114051309B CN114051309B CN202111294666.9A CN202111294666A CN114051309B CN 114051309 B CN114051309 B CN 114051309B CN 202111294666 A CN202111294666 A CN 202111294666A CN 114051309 B CN114051309 B CN 114051309B
- Authority
- CN
- China
- Prior art keywords
- link
- amplifier
- signal
- output
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002245 particle Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005070 sampling Methods 0.000 claims abstract description 23
- 230000001133 acceleration Effects 0.000 claims description 45
- 238000002955 isolation Methods 0.000 claims description 7
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 11
- 230000006641 stabilisation Effects 0.000 description 7
- 238000011105 stabilization Methods 0.000 description 7
- 230000003321 amplification Effects 0.000 description 6
- 238000003199 nucleic acid amplification method Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
- H05H7/02—Circuits or systems for supplying or feeding radio-frequency energy
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
- H05H7/001—Arrangements for beam delivery or irradiation
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
- H05H7/001—Arrangements for beam delivery or irradiation
- H05H2007/004—Arrangements for beam delivery or irradiation for modifying beam energy, e.g. spread out Bragg peak devices
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
- H05H7/02—Circuits or systems for supplying or feeding radio-frequency energy
- H05H2007/025—Radiofrequency systems
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Particle Accelerators (AREA)
Abstract
The invention discloses a control system and a method for radio frequency power and amplitude of a particle accelerator, wherein the system comprises the following components: the frequency source, the first link, the second link, the power combiner and the controller further comprise: the variable frequency sampling unit is respectively connected with the output end of the first link and the output end of the second link, is used for collecting the output signal parameters of the first link and the output signal parameters of the second link and outputting the output signal parameters to the controller, and the controller is used for adjusting the processing intensity of the first link to the first radio frequency signal and/or adjusting the processing intensity of the second link to the second radio frequency signal according to the output signal parameters of the first link and the output signal parameters of the second link. Therefore, the high-frequency power source of the particle accelerator has high amplitude stability and high phase stability, the radio frequency power efficiency of the particle accelerator is improved, the control precision of amplitude stability is improved, and the high-efficiency stable operation of the high-frequency power source required by the particle accelerator is further ensured.
Description
Technical Field
The embodiment of the invention relates to the technical field of particle accelerators, in particular to a system and a method for controlling radio frequency power and amplitude of a particle accelerator.
Background
In particle accelerator engineering applications, a radio frequency power source is required, and the radio frequency power source is used for generating a high-power radio frequency signal, and the signal is used for being sent to an acceleration cavity, and a high-frequency electric field is established in the acceleration cavity, so that acceleration of particle beam is realized. The accelerating cavity is generally a narrow-band resonant cavity, the bandwidth is narrow, and meanwhile, the working resonant frequency of the accelerating cavity can change to a certain extent along with different working states (including a beam state and a fed-in radio frequency power state). The problem is that the frequency index, amplitude index, phase index and the like of the current radio frequency power source are not very stable, which results in unstable acceleration of the beam current by the acceleration cavity and high-power acceleration.
Disclosure of Invention
The invention provides a system and a method for controlling radio frequency power and amplitude of a particle accelerator, which are used for ensuring high-efficiency and stable operation of a high-frequency power source required by the particle accelerator.
In order to achieve the above object, according to an aspect of the present invention, an embodiment provides a control system for radio frequency power and amplitude of a particle accelerator, including:
The device comprises a frequency source, a first link, a second link, a power synthesizer and a controller, wherein the controller is connected with the frequency source, and the output end of the frequency source is respectively connected with the input end of the first link and the input end of the second link; the output end of the first link is connected with the first input end of the power combiner, the output end of the second link is connected with the second input end of the power combiner, the first output end of the power combiner is connected with the accelerating cavity through a first directional coupler, and the second output end of the power combiner is connected with the isolation load;
Further comprises: the variable frequency sampling unit is respectively connected with the output end of the first link and the output end of the second link, and is used for collecting the output signal parameters of the first link and the output signal parameters of the second link and outputting the output signal parameters to the controller, and the controller is used for adjusting the processing intensity of the first link to the first radio frequency signal and/or adjusting the processing intensity of the second link to the second radio frequency signal according to the output signal parameters of the first link and the output signal parameters of the second link.
According to an embodiment of the present invention, the variable frequency sampling unit is further configured to collect a signal parameter of an output end of the first directional coupler and a signal parameter in the acceleration cavity, and output the signal parameter to the controller, where the controller is configured to adjust an initial signal output by the frequency source to the first link and the second link according to the signal parameter of the output end of the first directional coupler and the signal parameter in the acceleration cavity.
According to one embodiment of the present invention, the first link includes a first amplifier and a second directional coupler, the second link includes a second amplifier and a third directional coupler, an input end of the first amplifier and an input end of the second amplifier are respectively connected to an output end of the frequency source, an output end of the first amplifier is connected to an output end of the second directional coupler, an output end of the second amplifier is connected to an output end of the third directional coupler, and both the first amplifier and the second amplifier operate in a saturation amplification area;
The first link further includes a first phase shifter located between the frequency source and the first amplifier or between the first amplifier and the second directional coupler;
And/or the second link further comprises a second phase shifter located between the frequency source and the second amplifier or between the second amplifier and the third directional coupler.
According to one embodiment of the invention, the first link further comprises a third phase shifter, the first phase shifter being located between the frequency source and the first amplifier, the third phase shifter being located between the first amplifier and the second directional coupler; or the first phase shifter is located between the first amplifier and the second directional coupler, and the third phase shifter is located between the frequency source and the first amplifier.
According to one embodiment of the invention, the second link further comprises a fourth phase shifter located between the frequency source and the second amplifier, the fourth phase shifter located between the second amplifier and the third directional coupler; or the second phase shifter is located between the second amplifier and the third directional coupler, and the fourth phase shifter is located between the frequency source and the second amplifier.
According to one embodiment of the invention, the power synthesis is a 3dB power combiner.
According to one embodiment of the invention, each of the signal parameters includes a signal frequency parameter, a phase parameter, and an amplitude parameter.
In order to achieve the above object, another embodiment of the present invention provides a method for controlling rf power and amplitude of a particle accelerator, which is implemented based on the control system of rf power and amplitude of a particle accelerator as described above, the method comprising the following steps:
respectively acquiring output signal parameters of the first link and output signal parameters of the second link;
and adjusting the processing intensity of the first link to the first radio frequency signal and/or adjusting the processing intensity of the second link to the second radio frequency signal according to the output signal parameters of the first link and the output signal parameters of the second link.
According to one embodiment of the present invention, before adjusting the processing strength of the first link on the first radio frequency signal and/or adjusting the processing strength of the second link on the second radio frequency signal, the method further comprises:
Acquiring signal parameters of the output end of the first directional coupler and signal parameters in the acceleration cavity;
And adjusting initial signals output to the first link and the second link by the frequency source according to the signal parameters of the output end of the first directional coupler and the signal parameters in the accelerating cavity.
According to one embodiment of the invention, each of the signal parameters includes a signal frequency parameter, a phase parameter, and an amplitude parameter.
According to the control system and the method for the radio frequency power and the amplitude of the particle accelerator, which are provided by the embodiment of the invention, the system comprises: the device comprises a frequency source, a first link, a second link, a power synthesizer and a controller, wherein the controller is connected with the frequency source, and the output end of the frequency source is respectively connected with the input end of the first link and the input end of the second link; the output end of the first link is connected with the first input end of the power combiner, the output end of the second link is connected with the second input end of the power combiner, the first output end of the power combiner is connected with the accelerating cavity through a first directional coupler, and the second output end of the power combiner is connected with the isolation load; further comprises: the variable frequency sampling unit is respectively connected with the output end of the first link and the output end of the second link, and is used for collecting the output signal parameters of the first link and the output signal parameters of the second link and outputting the output signal parameters to the controller, and the controller is used for adjusting the processing intensity of the first link to the first radio frequency signal and/or adjusting the processing intensity of the second link to the second radio frequency signal according to the output signal parameters of the first link and the output signal parameters of the second link. Therefore, the high-frequency power source of the particle accelerator has high amplitude stability and high phase stability, the radio frequency power efficiency of the particle accelerator is improved, the control precision of amplitude stability is improved, and the high-efficiency stable operation of the high-frequency power source required by the particle accelerator is further ensured.
Drawings
FIG. 1 is a schematic diagram of a control system for controlling RF power and amplitude of a particle accelerator according to an embodiment of the present invention;
FIG. 2 is a graph showing the relationship between the power synthesis efficiency and the phase difference of a common power synthesizer in a control system for the RF power and amplitude of a particle accelerator according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a 3dB splitter in a control system for the RF power and amplitude of a particle accelerator in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of a control system for RF power and amplitude of a particle accelerator according to one embodiment of the present invention;
FIG. 5 is a schematic diagram of a control system for RF power and amplitude of a particle accelerator according to another embodiment of the present invention;
FIG. 6 is a schematic diagram of a control system for RF power and amplitude of a particle accelerator according to yet another embodiment of the present invention;
FIG. 7 is a schematic diagram of a control system for RF power and amplitude of a particle accelerator according to yet another embodiment of the invention;
FIG. 8 is a schematic diagram of a control system for RF power and amplitude of a particle accelerator according to another embodiment of the present invention;
FIG. 9 is a schematic diagram of a control system for RF power and amplitude of a particle accelerator according to yet another embodiment of the present invention;
FIG. 10 is a graph of the relationship between the conduction angle and the amplified power of an amplifier in a control system for the RF power and amplitude of a particle accelerator according to an embodiment of the present invention;
FIG. 11 is a block diagram of a variable frequency sampling unit in a control system for RF power and amplitude of a particle accelerator according to an embodiment of the present invention;
fig. 12 is a flowchart of a method for controlling radio frequency power and amplitude of a particle accelerator according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic structural diagram of a control system for radio frequency power and amplitude of a particle accelerator according to an embodiment of the present invention. As shown in fig. 1, the control system 100 includes:
the frequency synthesizer comprises a frequency source 101, a first link 102, a second link 103, a power synthesizer 104 and a controller 105, wherein the controller 105 is connected with the frequency source 101, and the output end of the frequency source 101 is respectively connected with the input end of the first link 102 and the input end of the second link 103; the output end of the first link 102 is connected with the first input end of the power combiner 104, the output end of the second link 103 is connected with the second input end of the power combiner 104, the first output end of the power combiner 104 is connected with the accelerating cavity 107 through the first directional coupler 106, and the second output end of the power combiner 104 is connected with the isolation load 108;
Further comprises: the variable frequency sampling unit 109 is connected to the output end of the first link 102 and the output end of the second link 103, and is configured to collect an output signal parameter of the first link 102 and an output signal parameter of the second link 103, and output the collected output signal parameter to the controller 105, where the controller 105 is configured to adjust a processing strength of the first link 102 on the first radio frequency signal and/or adjust a processing strength of the second link 103 on the second radio frequency signal according to the output signal parameter of the first link 102 and the output signal parameter of the second link 103.
It should be noted that the working principle of the system 100 is as follows: the controller 105 controls the frequency source 101 to output radio frequency signals to the first link 102 and the second link 103 respectively, the radio frequency signals output to the first link 102 are first radio frequency signals, the radio frequency signals output to the second link 103 are second radio frequency signals, the first radio frequency signals are processed by the first link 102 to form first processed radio frequency signals, the first processed radio frequency signals are input to the first input end of the power synthesizer 104, the second radio frequency signals are processed by the second link 103 to form second processed radio frequency signals, the second processed radio frequency signals are input to the second input end of the power synthesizer 104, the first processed radio frequency signals and the second processed radio frequency signals are synthesized by the power synthesizer 104 to form synthesized signals, the synthesized signals are output to the accelerating cavity 107 through the first directional coupler 106, and the accelerating cavity 107 establishes a high-frequency electric field according to the synthesized signals, so that particle beam acceleration is realized.
It may be appreciated that, when the first link 102 processes the first rf signal, the variable frequency sampling unit 109 collects the parameters of the first processed rf signal, when the second link 103 processes the second rf signal, the variable frequency sampling unit 109 collects the parameters of the second processed rf signal and feeds back to the controller 105, and the controller 105 adjusts the processing strength of the first link 102 and/or the second link 103 on the rf signal according to the parameters of the first processed rf signal and the parameters of the second processed rf signal.
The power combiner 104 needs to have an isolated load 108 to output extra energy.
It can be understood that the power of the signals of the first link 102 and the second link 103 are respectively P 1 and P 2, and the respective phases areAndThe resultant output power can be expressed as:
The synthesis efficiency can be expressed as:
When the phases are the same and the amplitudes are inconsistent, the method is as follows:
when the amplitude is the same and the phase is inconsistent, the method is as follows:
When the phase difference of the signals of the two paths of the first link 102 and the second link 103 is 0 ° and the power is the same, the output power is maximum, that is, the power efficiency is maximum (as shown in fig. 2). Therefore, the controller 105 adjusts the amplitude and phase of the synthesized signal of the power synthesizer 104 by adjusting the processing intensity of the signal by the first link 102 and/or the second link 103, so as to ensure that the radio frequency signal output to the acceleration cavity 107 is a radio frequency signal with high amplitude stability, high phase stability and high power efficiency, and meet the acceleration requirement of the acceleration cavity 107 on the particle beam.
In further embodiments, the power combiner 104 may be a 3dB power combiner (quadrature power combiner), where the output power of the combined signal of the 3dB power combiner is maximum when the phase difference of the first and second processed radio frequency signals differs by 90 °.
It should be explained that the 3dB power combiner is the inverse of the 3dB power divider, and the operating principle of the 3dB power divider is based on the λ/4 coupled transmission line section.
As shown in fig. 3, in the structural schematic diagram of the 3dB power splitter, the port 1 is an input end, the port 2 is a coupling end, the port 3 is an isolation end, and the port 4 is a pass-through end. Typically the port load R 1＝R2＝R3＝R4 =50Ω. By adjusting the coupling degree between the two transmission line sections, the isolation end can have no energy output, and the energy output by the coupling end and the through end respectively accounts for half of the energy of the signal source, so that the power divider is called as a 3dB power divider. Since the electrical length of the transmission line segment is lambda/4, the through terminal voltage lags the coupling terminal voltage by 90 deg..
When the input signal voltage Ue j0° is applied to the port 1, the port 4 (through terminal) voltage is:
the port 2 (coupling end) voltage is:
port 3 (isolated terminal) voltage U 3 = 0.
The 4-port and 2-port voltages are equal but out of phase by 90 °. The 1 port and the 3 port are isolated from each other.
From a power perspective, the 1-port input power is:
P1＝U1 2/R，
The 4-port power is:
P4＝U4 2/R＝U1 2/2R＝P1/2，
The 2-port power is:
P2＝U2 2/R＝U1 2/2R＝P1/2，
3-port power p3=0.
Thus, it is known that when the 3dB power divider is reversely used as a 3dB power combiner, signals of 2-port and 4-port need to be phase-separated by 90 ° to maximize the signal output power of 1-port.
Wherein the synthesized output power of the power synthesizer 104 satisfies the following formula:
Where P 0 is the combined output power of the power combiner 104, P 1 is the power of the signal processed by the first link 102, P 2 is the power of the signal processed by the second link 103, For the phase of the signal processed by the first link 102,For the phase of the signal processed by the second link 103, θ 1 and θ 2 are the amounts of the power combiner 104 acting on the phases of the signals processed by the first link 102 and the second link 103, respectively, and θ 1＝θ2＝0.A1 and a 2 are the amounts of the power combiner 104 acting on the power amplitudes of the signals processed by the first link 102 and the second link 103, respectively, and a 1＝A2 =1. When (when)The output of P 0 is maximum when the phase difference is 90 degrees. It can be seen that there are two main factors affecting the same-frequency constant-amplitude power synthesis efficiency: the power synthesizer is used for generating a power signal according to the power transmission characteristic and the phase delay characteristic of the power synthesizer. When the power combiner 104 is fixed, the power combiner 104 acts on the combined signal almost the same, and further, to maximize the combined power, the phase and amplitude of the combined signal need to be adjusted, so that the controller 105 adjusts the amplitude and phase of the combined signal of the power combiner 104 by adjusting the processing intensity of the signal by the first link 102 and/or the second link 103, so as to ensure that the radio frequency signal output to the acceleration cavity 107 is a radio frequency signal with high amplitude, high phase stability and high power efficiency, and meet the acceleration requirement of the acceleration cavity 107 on the particle beam.
Therefore, for the common power combiner 104 with the isolated load end, the signals need to be adjusted to be in phase and in the same amplitude through the first link 102 and the second link 103, and for the 3dB power combiner, when the signals need to be adjusted to be in phase difference of 90 ° through the first link 102 and the second link 103, the same amplitude is achieved, and finally the radio frequency signal output to the acceleration cavity 107 is a radio frequency signal with high amplitude stability, high phase stability and high power efficiency.
According to an embodiment of the present invention, as shown in fig. 1, the variable frequency sampling unit 109 is further configured to collect a signal parameter at an output end of the first directional coupler 106 and a signal parameter in the acceleration cavity 107, and output the signal parameter to the controller 105, where the controller 105 is configured to adjust an initial signal output from the frequency source 101 to the first link 102 and the second link 103 according to the signal parameter at the output end of the first directional coupler 106 and the signal parameter in the acceleration cavity 107.
It should be noted that, when the power combiner 104 forms a combined signal, the combined signal is input to the acceleration cavity 107 after passing through the first directional coupler 106, and at this time, the variable frequency sampling unit 109 further collects the transmitted signal parameter in the first directional coupler 106 and the signal parameter received in the acceleration cavity 107, and transmits the collected signal parameter to the controller 105, and the controller 105 adjusts the initial signals output by the frequency source 101 to the first link 102 and the second link 103 according to the parameters.
The accelerating cavity 107 is generally a narrow-band resonant cavity, and the operating resonant frequency of the accelerating cavity 107 varies to a certain extent according to the operating state (beam state and radio frequency power fed in). Further, to ensure that the operation state of the acceleration chamber 107 is stable, it is necessary to ensure that the radio frequency power fed in is stable, and it is also necessary to ensure that the operation state of the acceleration chamber 107 is in an optimal state. For example, if the phase of the signal after the first directional coupler 106 is coupled into the accelerating cavity 107 is a first phase, and the phase of the signal corresponding to the accelerating cavity 107 is a second phase (i.e. the phase of the rf signal in the optimal operation state), the signal output by the power synthesizer 104 is maximum, but the signal output by the power synthesizer 104 is not adapted to the accelerating cavity 107, so that the accelerating cavity 107 cannot be in the optimal operation state. Further, the variable frequency sampling unit 109 collects signal parameters received in the acceleration chamber 107, and the controller 105 adjusts initial signals of the outputs of the frequency source 101 to the first link 102 and the second link 103 according to the foregoing parameters.
For example, when using a 3dB power combiner, the phase of the first rf signal output by the frequency source 101 to the first link 102 is started to be 20 °, the phase of the second rf signal output to the second link 102 is started to be 110 °, and when the operation state of the acceleration chamber 107 is not good after the combination, it is necessary to adjust the phase of the first rf signal output by the frequency source 101 to the first link 102, for example, to be 30 °, and the phase of the second rf signal output to the second link 102 to be 120 °.
For another example, when using a normal power combiner, the phase of the first rf signal output by the frequency source 101 to the first link 102 is started to be 50 °, the phase of the second rf signal output to the second link 102 is started to be 50 °, and when the operation state of the acceleration chamber 107 is not good after the combination, it is necessary to adjust the phase of the first rf signal output by the frequency source 101 to the first link 102 to be 60 °, for example, and the phase of the second rf signal output to the second link 102 to be 60 °. Thus, it is possible to ensure that the acceleration chamber 107 operates in an optimal state while ensuring that the power efficiency of the signal output from the power combiner 104 is maximized.
Based on this, by extracting the signal parameters of the acceleration chamber 107, the first link 102 and the second link 103, the signals of the first link 102 and the second link 103 are re-processed and distributed so that the signal power efficiency input into the acceleration chamber 107 is maximized, and the acceleration chamber 107 can also be operated in an optimal state.
According to one embodiment of the invention, the signal parameters include a signal frequency parameter, a phase parameter, and an amplitude parameter. In the system in the present embodiment of the invention, the same frequency source and thus the same frequency parameters are used. The phase and amplitude parameters may be adjusted by components in the link.
The details of the components included in each link, and the adjustment of the phase and amplitude parameters, are described below.
According to one embodiment of the present invention, as shown in fig. 4 to 7, the first link 102 includes a first amplifier 110 and a second directional coupler 111, the second link 103 includes a second amplifier 112 and a third directional coupler 113, an input terminal of the first amplifier 110 and an input terminal of the second amplifier 112 are respectively connected to an output terminal of the frequency source 101, an output terminal of the first amplifier 110 is connected to an output terminal of the second directional coupler 111, an output terminal of the second amplifier 112 is connected to an output terminal of the third directional coupler 113, and both the first amplifier 110 and the second amplifier 112 operate in a saturation amplification region;
The first link 102 further comprises a first phase shifter 114, the first phase shifter 114 being located between the frequency source 101 and the first amplifier 110 or between the first amplifier 110 and the second directional coupler 111;
And/or the second link 103 further comprises a second phase shifter 115, the second phase shifter 115 being located between the frequency source 101 and the second amplifier 112 or between the second amplifier 112 and the third directional coupler 113.
As shown in fig. 4, the first link 102 includes a first phase shifter 114, the second link 103 does not include a phase shifter, the frequency source 101 outputs a first radio frequency signal to the first phase shifter 114, adjusts the phase of the first radio frequency signal, outputs the first radio frequency signal to the first amplifier 110, amplifies the first radio frequency signal by the first amplifier 110, outputs the first radio frequency signal to the second directional coupler 111, and outputs the second radio frequency signal to the power combiner 104 after passing through the second directional coupler 111. The second rf signal output from the frequency source 101 is sent to the second amplifier 112, amplified, output to the third directional coupler 113, and output to the power combiner 104 after passing through the third directional coupler 113. Wherein the first phase shifter 114 is disposed before the first amplifier 110, and may perform phase adjustment on the unamplified signal.
As shown in fig. 5, the first link 102 includes a first phase shifter 114, the second link 103 does not include a phase shifter, the frequency source 101 outputs a first radio frequency signal to the first amplifier 110, the first radio frequency signal is amplified by the first amplifier 110 and then outputted to the first phase shifter 114, the first phase shifter 114 adjusts the phase, and then outputted to the second directional coupler 111, and the second directional coupler 111 and then outputted to the power combiner 104. The second rf signal output from the frequency source 101 is sent to the second amplifier 112, amplified, output to the third directional coupler 113, and output to the power combiner 104 after passing through the third directional coupler 113. Wherein the first phase shifter 114 is disposed after the first amplifier 110, and may perform phase adjustment on the amplified signal.
It should be noted that, if the second phase shifter 115 is only disposed in the second link 103, the first link 102 is not disposed with a phase shifter, and the signal transmission principle refers to the principle that the first phase shifter 114 is disposed in the first link 102, and the phase shifter is not disposed in the second link 103, which will not be described herein.
Based on the embodiments shown in fig. 4 and 5, the phase shifter is arranged in only one link, the phase of the signal in the other link can be referred to, and the phase difference of the two links is required to be adjusted, so that the arrangement of components is less and the cost is low.
As shown in fig. 6, the first link 102 includes a first phase shifter 114, the second link 103 includes a second phase shifter 115, the frequency source 101 outputs a first radio frequency signal to the first phase shifter 114, the first radio frequency signal is phase-adjusted by the first phase shifter 114 and then output to the first amplifier 110, the first radio frequency signal is amplified by the first amplifier 110 and then output to the second directional coupler 111, and the second radio frequency signal is output to the power combiner 104 after passing through the second directional coupler 111. The second radio frequency signal output by the frequency source 101 is given to the second phase shifter 115, and after being subjected to phase adjustment by the second phase shifter 115, the second radio frequency signal is output to the second amplifier 112, amplified, output to the third directional coupler 113, and output to the power combiner 104 after passing through the third directional coupler 113. Wherein the first phase shifter 114 is disposed before the first amplifier 110, and may perform phase adjustment on the unamplified signal. The second phase shifter 115 is provided before the second amplifier 112, and may perform phase adjustment on the unamplified signal.
As shown in fig. 7, the first link 102 includes a first phase shifter 114, the second link 103 includes a second phase shifter 115, the frequency source 101 outputs a first radio frequency signal to the first amplifier 110, the first radio frequency signal is amplified by the first amplifier 110, the first phase shifter 114 is output, the phase of the first radio frequency signal is adjusted by the first phase shifter 114, the second radio frequency signal is output to the second directional coupler 111, and the second radio frequency signal is output to the power combiner 104 after passing through the second directional coupler 111. The second radio frequency signal output by the frequency source 101 is output to the second amplifier 112, amplified, then provided to the second phase shifter 115, phase-adjusted by the second phase shifter 115, output to the third directional coupler 113, and output to the power combiner 104 after passing through the third directional coupler 113. Wherein the first phase shifter 114 is disposed after the first amplifier 110, and may perform phase adjustment on the amplified signal. The second phase shifter 115 is disposed after the second amplifier 112, and may perform phase adjustment on the amplified signal.
In addition, the first phase shifter 114 in the first link 102 may be disposed before the first amplifier 110, and the second phase shifter 115 in the second link 103 may be disposed after the second amplifier 112. Or the first phase shifter 114 in the first link 102 is arranged after the first amplifier 110 and the second phase shifter 115 in the second link 103 is arranged before the second amplifier 112. The present invention is not particularly limited thereto.
Based on the embodiments shown in fig. 6 and 7, the phase of the phase shifter adjustment signal is more flexible to be set in two paths, respectively, than if the phase shifter is set in only one link.
According to one embodiment of the present invention, as shown in fig. 8, the first link 102 further includes a third phase shifter 116, the first phase shifter 114 is located between the frequency source 101 and the first amplifier 110, and the third phase shifter 116 is located between the first amplifier 110 and the second directional coupler 111; or the first phase shifter 114 is located between the first amplifier 110 and the second directional coupler 111 and the third phase shifter 116 is located between the frequency source 101 and the first amplifier 110.
The frequency source 101 outputs a first rf signal to the first phase shifter 114, adjusts the phase of the first rf signal by the first phase shifter 114, outputs the first rf signal to the first amplifier 110, amplifies the first rf signal by the first amplifier 110, outputs the third rf signal to the third phase shifter 116, adjusts the phase of the third rf signal by the third phase shifter 116, outputs the second rf signal to the second directional coupler 111, and outputs the second rf signal to the power combiner 104 after passing through the second directional coupler 111. Wherein the first phase shifter 114 is disposed before the first amplifier 110, and may perform phase adjustment on the unamplified signal. The third phase shifter 116 is disposed after the first amplifier 110, and may perform phase adjustment on the amplified signal.
The second link 103 may be provided with a phase shifter or may not be provided with a phase shifter, and if one phase shifter is provided, the arrangement shown in fig. 6 and 7 is referred to. The invention is not limited in this regard. In this embodiment, by arranging phase shifters before and after the first amplifier 110, the phase of the signal can be corrected after the signal is amplified, so that the phase of the signal entering the power combiner 104 is more accurate.
According to one embodiment of the invention, as shown in fig. 9, the second link 103 further comprises a fourth phase shifter 117, the second phase shifter 115 being located between the frequency source 101 and the second amplifier 112, the fourth phase shifter 117 being located between the second amplifier 112 and the third directional coupler 113; or the second phase shifter 115 is located between the second amplifier 112 and the third directional coupler 113, and the fourth phase shifter 117 is located between the frequency source 101 and the second amplifier 112.
The frequency source 101 outputs a second radio frequency signal to the second phase shifter 115, the second phase shifter 115 adjusts the phase, the second amplifier 112 amplifies the phase, the fourth phase shifter 117 adjusts the phase, the third directional coupler 113, and the third directional coupler 113 and the power combiner 104. Wherein the second phase shifter 115 is arranged before the second amplifier 112, the unamplified signal may be phase adjusted. The fourth phase shifter 117 is provided after the second amplifier 112, and may perform phase adjustment on the amplified signal.
The phase shifter may be provided in the first link 102, or may not be provided, and if one phase shifter is provided, the arrangement of fig. 6 and 7 is referred to. If two phase shifters are provided, the arrangement of fig. 8 is referred to. The invention is not limited in this regard. In this embodiment, phase shifters are disposed before and after the second amplifier 112, so that the phase of the signal can be corrected after the signal is amplified, so that the phase of the signal entering the power combiner 104 is more accurate.
In the embodiment shown in fig. 9, two phase shifters are disposed in the first link 102 and the second link 103, so that the controller 105 adjusts the radio frequency signals in the links more accurately, and further, the phase difference of the signals entering the power combiner 104 is 0 ° or 90 °, so as to ensure that the power efficiency of the combined signals is maximum.
It should be noted that, the first amplifier 110 and the second amplifier 112 both operate in the saturation amplifying region, so that the amplifying efficiency of the power amplifier can be improved as much as possible.
As shown in fig. 10, the conduction angle theta directly affects the efficiency η of the power amplifier. The conduction angle of the class A amplifier current is 180 degrees, the conduction angle of the class B amplifier current is about 90 degrees, and the conduction angle of the class C amplifier current is smaller than 90 degrees. The efficiency of the A type working state is 50%, and the maximum efficiency of the B type working state is 78.5%. As the conduction angle decreases, the power conversion efficiency increases continuously. As the conduction angle of the working point of the amplifier is reduced, the efficiency of the system is continuously improved. Thus, the amplification efficiency of the power amplifier can be achieved by operating both the first amplifier 110 and the second amplifier 112 in the saturation amplification region.
Based on this, the adjustment of the combined output power can be achieved by adjusting the phase relationship between the first radio frequency signal and the second radio frequency signal. In this way, the power amplifier always operates in a saturated amplifying state during the operation of the accelerator system. In the aging of the accelerator system or the process of gradually increasing the cavity voltage, the phase adjustment mode is adopted to realize the adjustment of the cavity voltage of the accelerator. The amplitude feedback of the variable frequency sampling unit of the system is equivalent to the feedback realized by adopting a phase adjustment mode. The amplitude and phase of the output power signal are synthesized by sampling the phase of the first radio frequency signal and the phase of the second radio frequency signal, and meanwhile, the amplitude stability control and the phase adjustment control of the whole accelerator high-frequency system can be realized according to the cavity voltage sampling. In the beam working process, the amplitude stabilization control and the phase adjustment control required by beam stabilization can be realized in this way.
Under the condition of full power operation, the efficiency of the high-frequency power source system is highest, the output power of the synthesizer is maximum, and the voltage field established by the cavity is also maximum. At this time, the power efficiency of the whole high-frequency system is greatly improved compared with that of a conventional linear amplifying system.
In addition, the variable frequency sampling unit 109 does not adjust the amplitude of the input signal of the entire system 100 (the power amplifier adopts saturation amplification), and the variable frequency sampling unit 109 (generally called a low level system (LLRF low LEVEL RF SYSTEM, as shown in fig. 11)) realizes feedback control of the signal by sampling the acceleration cavity signal and sampling the incident power and reflected power signals after the first amplifier and the second amplifier are combined. Different from a common feedback control mode, after the signals are sampled in a frequency conversion mode (determined according to actual needs) and feedback calculation is performed, the output phases of the phase shifters at the input ends of the two amplifiers are controlled, and the synthesized power of the two amplifiers is further controlled and realized by adjusting the phase shifters, so that the stable control of the amplitude of the whole system 100 is realized. The phase shifter also achieves the phase of the signal fed into the acceleration chamber 107 after input by the power combiner 104. By providing one or more phase shifters, functions equivalent to amplitude stabilization control and phase stabilization control can be flexibly realized.
The variable frequency sampling unit 9 is configured to monitor the frequency, amplitude and phase information of the signal sent to the power combiner 104 by the first amplifier 110, and also monitor the frequency, amplitude and phase information of the signal sent to the power combiner 104 by the second amplifier 112, and also monitor the frequency, amplitude and phase of the electric field signal in the acceleration chamber 107. Further, the adjustment of the phase relationship between the first amplifier 110 and the second amplifier 112 can realize the adjustment of the amplitude of the synthesized output signal of the power synthesizer 104, which can be practically equivalent to the amplitude adjustment and the amplitude stabilization control of the entire system 100. Thus, the amplitude stabilization and phase stabilization control necessary for the particle accelerator system are realized, and the amplitude and phase control is converted into the phase control.
Therefore, the invention adopts the design method of the saturated amplifier, and can effectively improve the system efficiency. Under the high-power use condition, the efficiency is improved, and the advantages of saving electric energy, compressing the volume size, relieving the pressure of a cooling system and the like can be obtained. By adopting the method of power phase feedback synthesis, the amplitude stability control capability and the accuracy of the system can be effectively improved. The aging and debugging of the accelerating cavity are facilitated, and meanwhile, the requirement of the output power of the system in a final working state is met. The system stability is improved, and the problems of low design efficiency and complex debugging of the linear amplifier are avoided. The system cooling, heat dissipation and other requirements can be reduced compared with the original linear amplification system. The whole amplitude stable control loop modifies the structure, becomes phase control feedback, and has higher phase control precision.
Fig. 12 is a flowchart of a method for controlling radio frequency power and amplitude of a particle accelerator according to an embodiment of the present invention. The method is realized based on a control system of radio frequency power and amplitude of the particle accelerator as before, and as shown in fig. 12, the control method comprises the following steps:
s101, respectively acquiring output signal parameters of a first link and output signal parameters of a second link;
s102, according to the output signal parameters of the first link and the output signal parameters of the second link, adjusting the processing intensity of the first link on the first radio frequency signal and/or adjusting the processing intensity of the second link on the second radio frequency signal. The processing strength is understood to mean, among other things, the amplitude of the phase adjustment of the signal.
It will be appreciated that when a phase shifter is provided in the first link, the phase shifter in the first link is adjusted only in accordance with the output signal parameter of the first link, the output signal parameter of the second link, so that the signal phase difference of the two links is maintained at 0 ° or 90 °. When the phase shifter is provided in the second link, the phase shifter in the second link is adjusted only according to the output signal parameter of the first link, the output signal parameter of the second link, so that the signal phase difference of the two links is maintained at 0 ° or 90 °. When phase shifters are provided in both the first link and the second link, the phase shifters in both links are adjusted at the same time so that the signal phase difference of both links is maintained at 0 ° or 90 °.
Wherein each signal parameter includes a signal frequency parameter, a phase parameter, and an amplitude parameter. Because the frequency sources are the same frequency source, and thus the frequency parameters are the same, and the amplitude parameter is related to the phase parameter, only the phase parameter can be adjusted in the invention. Thus, the phase parameters of the signals in each link can be acquired, and the phase shifters in the two links are adjusted so that the signal phase difference of the two links is maintained at 0 ° or 90 °.
With an adjustment target of 90 ° for example, the signal phase in the first link is 21 °, the signal phase in the second link is 110 °, then the signal phase in the first link may be adjusted to 20 °, or the signal phase in the second link may be adjusted to 111 °, or the signal phase in the first link may be adjusted to 20.5 °, and the signal phase in the second link may be adjusted to 110.5 °. To ensure that the signal phase difference of the two links remains at 90 deg..
According to one embodiment of the present invention, before adjusting the processing strength of the first link on the first radio frequency signal and/or adjusting the processing strength of the second link on the second radio frequency signal, the method further comprises:
acquiring signal parameters of an output end of the first directional coupler and signal parameters in an acceleration cavity;
and adjusting initial signals output to the first link and the second link by the frequency source according to the signal parameters of the output end of the first directional coupler and the signal parameters in the acceleration cavity.
That is, if the phase of the signal after the first directional coupler is coupled to the accelerating cavity is the first phase, and the phase of the signal corresponding to the accelerating cavity is the second phase (i.e. the phase of the radio frequency signal in the optimal working state), the signal output power efficiency of the power synthesizer is maximum, but the signal is not suitable for the accelerating cavity, so that the accelerating cavity cannot be in the optimal working state. Furthermore, the variable frequency sampling unit collects signal parameters received in the acceleration cavity, and the controller adjusts initial signals of the output of the frequency source to the first link and the second link according to the parameters.
For example, when using a 3dB power combiner, the phase of the first rf signal output by the frequency source to the first link is started to be 20 °, the phase of the second rf signal output to the second link is started to be 110 °, and when the operation state of the acceleration chamber is not good after the combination, the phase of the first rf signal output by the frequency source to the first link needs to be adjusted, for example, to be 30 °, and the phase of the second rf signal output to the second link needs to be adjusted to be 120 °.
For another example, when using a common power combiner, the phase of the first rf signal output by the frequency source to the first link is started to be 50 °, the phase of the second rf signal output to the second link is started to be 50 °, and when the operation state of the acceleration chamber is not good after the combining, the phase of the first rf signal output by the frequency source to the first link needs to be adjusted to be 60 °, for example, the phase of the second rf signal output to the second link needs to be adjusted to be 60 °. Therefore, under the condition that the maximum power efficiency of the signal output by the power synthesizer is ensured, the acceleration cavity can be ensured to work in an optimal state.
Based on this, by extracting signal parameters of the acceleration cavity, the first link and the second link, the signals of the first link and the second link are processed and distributed again, so that the power efficiency of the signals input into the acceleration cavity is maximized, and the acceleration cavity can also be operated in an optimal state.
In summary, according to the system and method for controlling radio frequency power and amplitude of a particle accelerator provided by the embodiment of the invention, the system includes: the device comprises a frequency source, a first link, a second link, a power synthesizer and a controller, wherein the controller is connected with the frequency source, and the output end of the frequency source is respectively connected with the input end of the first link and the input end of the second link; the output end of the first link is connected with the first input end of the power combiner, the output end of the second link is connected with the second input end of the power combiner, the first output end of the power combiner is connected with the accelerating cavity through the first directional coupler, and the second output end of the power combiner is connected with the isolation load; further comprises: the variable frequency sampling unit is respectively connected with the output end of the first link and the output end of the second link, is used for collecting the output signal parameters of the first link and the output signal parameters of the second link and outputting the output signal parameters to the controller, and the controller is used for adjusting the processing intensity of the first link to the first radio frequency signal and/or adjusting the processing intensity of the second link to the second radio frequency signal according to the output signal parameters of the first link and the output signal parameters of the second link. Therefore, the high-frequency power source of the particle accelerator has high amplitude stability and high phase stability, the radio frequency power efficiency of the particle accelerator is improved, the control precision of amplitude stability is improved, and the high-efficiency stable operation of the high-frequency power source required by the particle accelerator is further ensured.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (7)
1. A system for controlling radio frequency power and amplitude of a particle accelerator, comprising:
The device comprises a frequency source, a first link, a second link, a power synthesizer and a controller, wherein the controller is connected with the frequency source, and the output end of the frequency source is respectively connected with the input end of the first link and the input end of the second link; the output end of the first link is connected with the first input end of the power combiner, the output end of the second link is connected with the second input end of the power combiner, the first output end of the power combiner is connected with the accelerating cavity through a first directional coupler, and the second output end of the power combiner is connected with the isolation load;
Further comprises: the variable frequency sampling unit is respectively connected with the output end of the first link and the output end of the second link, and is used for collecting the output signal parameters of the first link and the output signal parameters of the second link and outputting the output signal parameters to the controller, and the controller is used for adjusting the processing intensity of the first link on the first radio frequency signal and/or adjusting the processing intensity of the second link on the second radio frequency signal according to the output signal parameters of the first link and the output signal parameters of the second link; when the phase difference of the signals entering the power combiner is 0 degrees or the power combiner is a 3dB power combiner, the phase difference of the signals entering the 3dB power combiner is 90 degrees, so that the maximum power efficiency of the combined signals is ensured;
The variable frequency sampling unit is further configured to collect signal parameters of an output end of the first directional coupler and signal parameters in the acceleration cavity, and output the signal parameters to the controller, where the controller is configured to adjust initial signals output to the first link and the second link by the frequency source according to the signal parameters of the output end of the first directional coupler and the signal parameters in the acceleration cavity;
the first link comprises a first amplifier and a second directional coupler, the second link comprises a second amplifier and a third directional coupler, the input end of the first amplifier and the input end of the second amplifier are respectively connected with the output end of the frequency source, the output end of the first amplifier is connected with the output end of the second directional coupler, the output end of the second amplifier is connected with the output end of the third directional coupler, and the first amplifier and the second amplifier both work in a saturated amplifying region;
The first link further includes a first phase shifter located between the frequency source and the first amplifier or between the first amplifier and the second directional coupler;
And/or the second link further comprises a second phase shifter located between the frequency source and the second amplifier or between the second amplifier and the third directional coupler.
2. The system of claim 1, wherein the first link further comprises a third phase shifter, the first phase shifter being located between the frequency source and the first amplifier, the third phase shifter being located between the first amplifier and the second directional coupler; or the first phase shifter is located between the first amplifier and the second directional coupler, and the third phase shifter is located between the frequency source and the first amplifier.
3. The system of claim 1 or 2, wherein the second link further comprises a fourth phase shifter, the second phase shifter being located between the frequency source and the second amplifier, the fourth phase shifter being located between the second amplifier and the third directional coupler; or the second phase shifter is located between the second amplifier and the third directional coupler, and the fourth phase shifter is located between the frequency source and the second amplifier.
4. The system of claim 1, wherein each of the signal parameters includes a signal frequency parameter, a phase parameter, and an amplitude parameter.
5. A method for controlling the radio frequency power and amplitude of a particle accelerator, characterized in that it is implemented on the basis of a control system for the radio frequency power and amplitude of a particle accelerator according to any one of claims 1-4, said method comprising the steps of:
respectively acquiring output signal parameters of the first link and output signal parameters of the second link;
and adjusting the processing intensity of the first link to the first radio frequency signal and/or adjusting the processing intensity of the second link to the second radio frequency signal according to the output signal parameters of the first link and the output signal parameters of the second link.
6. The method according to claim 5, further comprising, before adjusting the processing strength of the first rf signal by the first link and/or adjusting the processing strength of the second rf signal by the second link:
Acquiring signal parameters of the output end of the first directional coupler and signal parameters in the acceleration cavity;
And adjusting initial signals output to the first link and the second link by the frequency source according to the signal parameters of the output end of the first directional coupler and the signal parameters in the accelerating cavity.
7. The method of claim 5 or 6, wherein each of the signal parameters includes a signal frequency parameter, a phase parameter, and an amplitude parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111294666.9A CN114051309B (en) | 2021-11-03 | 2021-11-03 | System and method for controlling radio frequency power and amplitude of particle accelerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111294666.9A CN114051309B (en) | 2021-11-03 | 2021-11-03 | System and method for controlling radio frequency power and amplitude of particle accelerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114051309A CN114051309A (en) | 2022-02-15 |
| CN114051309B true CN114051309B (en) | 2024-08-06 |
Family
ID=80207091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111294666.9A Active CN114051309B (en) | 2021-11-03 | 2021-11-03 | System and method for controlling radio frequency power and amplitude of particle accelerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114051309B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115003003B (en) * | 2022-05-30 | 2023-09-19 | 国电投核力电科(无锡)技术有限公司 | High-frequency low-level control system and control method for particle accelerator |
| CN116073771B (en) * | 2023-02-08 | 2024-06-28 | 中国科学院近代物理研究所 | Solid state power source linearization system and method for particle accelerator |
| CN117452189B (en) * | 2023-12-22 | 2024-06-04 | 深圳市瀚强科技股份有限公司 | Radio frequency power detection method and related device |
| CN117517769B (en) * | 2024-01-08 | 2024-04-09 | 深圳市瀚强科技股份有限公司 | Debug circuit, control method of debug circuit and radio frequency power detection circuit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1813399A (en) * | 2003-06-25 | 2006-08-02 | 诺基亚有限公司 | Power control for a transmitter |
| CN108650771A (en) * | 2018-07-12 | 2018-10-12 | 北京航天广通科技有限公司 | Self-excitation stable control method, system and the storage medium of accelerator superconductor cavity |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4700108A (en) * | 1985-10-02 | 1987-10-13 | Westinghouse Electric Corp. | Cavity system for a particle beam accelerator |
| SU1402237A2 (en) * | 1986-08-04 | 1990-08-30 | Московский Инженерно-Физический Институт | Linear electron accelerator |
| KR100533641B1 (en) * | 2004-03-04 | 2005-12-06 | 삼성전기주식회사 | Dual band transmitter with filtering coupler |
| CN101090302B (en) * | 2007-07-31 | 2010-12-29 | 中兴通讯股份有限公司 | Self-correction and self-test method formobile terminal and mobile terminal with the method |
| US8183801B2 (en) * | 2008-08-12 | 2012-05-22 | Varian Medical Systems, Inc. | Interlaced multi-energy radiation sources |
| CN101883469A (en) * | 2010-03-15 | 2010-11-10 | 中国原子能科学研究院 | Method and device for eliminating amplitude-phase control crosstalk in self-excitation mode |
| CN103580623A (en) * | 2012-08-10 | 2014-02-12 | 中兴通讯股份有限公司 | Radiofrequency power amplifier device and radiofrequency power amplifying method |
| US9166536B2 (en) * | 2012-10-30 | 2015-10-20 | Eta Devices, Inc. | Transmitter architecture and related methods |
| CN103019213A (en) * | 2012-12-19 | 2013-04-03 | 江苏安德信超导加速器科技有限公司 | Adjusting control system and adjusting and control method for continuous variable-energy irradiation accelerator |
| CN104333375B (en) * | 2013-11-05 | 2017-04-12 | 河海大学 | Power source low-level all-digital amplitude phase control system for high-energy particle accelerator and implementation method thereof |
| GB201713889D0 (en) * | 2017-08-29 | 2017-10-11 | Alceli Ltd | Linear accelerating structure for charged hadrons |
| CN108684133B (en) * | 2018-06-22 | 2020-07-17 | 中国科学院上海应用物理研究所 | Synchrotron high-frequency system and frequency and cavity pressure regulation and control method thereof |
-
2021
- 2021-11-03 CN CN202111294666.9A patent/CN114051309B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1813399A (en) * | 2003-06-25 | 2006-08-02 | 诺基亚有限公司 | Power control for a transmitter |
| CN108650771A (en) * | 2018-07-12 | 2018-10-12 | 北京航天广通科技有限公司 | Self-excitation stable control method, system and the storage medium of accelerator superconductor cavity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114051309A (en) | 2022-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114051309B (en) | System and method for controlling radio frequency power and amplitude of particle accelerator | |
| CN107112953B (en) | Power amplifier for amplifying radio frequency signals | |
| CN102769431B (en) | Doherty amplifier circuit | |
| EP3461000B1 (en) | Doherty amplifier | |
| JP2002026668A (en) | Transmission power amplifier and its method | |
| CN111030620A (en) | Novel combined broadband Doherty power amplifier and design method thereof | |
| US9673761B2 (en) | Power amplifier and power amplification method | |
| KR102645497B1 (en) | radio frequency power amplifier | |
| CN106411275B (en) | Improve the three tunnel Doherty power amplifiers and implementation method of bandwidth | |
| JP5035846B2 (en) | Doherty amplifier circuit | |
| US6646504B2 (en) | Broadband amplifier system having improved linearity and minimum loss | |
| CN101488790A (en) | Power amplification apparatus and transmitter | |
| JP5754362B2 (en) | amplifier | |
| CN103095228A (en) | Intermodulation suppression amplifying circuit and control method | |
| CN107294498B (en) | Asymmetric Doherty amplifier | |
| JP2016063291A (en) | Wide band amplifier | |
| WO2020208813A1 (en) | Doherty amplifier circuit | |
| US7719353B2 (en) | LINC amplifying device | |
| CN110912845A (en) | Analog predistortion processing circuit and signal processing apparatus | |
| KR101686351B1 (en) | 3-way doherty power amplifier | |
| Lehmann et al. | Sequential power amplifiers with adaptable combiners | |
| EP3553946B1 (en) | Radio frequency circuit, transmitter, base station and user terminal | |
| JP5822784B2 (en) | Power amplification device and power amplification method | |
| CN210693998U (en) | Analog predistortion processing circuit and signal processing apparatus | |
| US20040102169A1 (en) | Real-time active phase control for high power amplifier combining for space applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |