CN108650771A - Self-excitation stable control method, system and the storage medium of accelerator superconductor cavity - Google Patents
Self-excitation stable control method, system and the storage medium of accelerator superconductor cavity Download PDFInfo
- Publication number
- CN108650771A CN108650771A CN201810764751.9A CN201810764751A CN108650771A CN 108650771 A CN108650771 A CN 108650771A CN 201810764751 A CN201810764751 A CN 201810764751A CN 108650771 A CN108650771 A CN 108650771A
- Authority
- CN
- China
- Prior art keywords
- signal
- free
- oscillation signal
- superconductor cavity
- superconductor
- 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.)
- Pending
Links
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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Particle Accelerators (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
The invention discloses a kind of self-excitation stable control method, system and the storage mediums of accelerator superconductor cavity.A kind of self-excited oscillation type radio frequency stabilizing control system of accelerator superconductor cavity, including：External reference source, controller combination, amplifier, directional coupler, superconductor cavity and tunable superconductor resonator device；External reference source is used to generate the target oscillator signal of superconductor cavity；Amplifier after amplifying free-run oscillation signal for inputting directional coupler；Directional coupler is used to detect the power of amplifier input signal and superconduction cavity reflection signal, and testing result is fed back to controller combination；Controller combination generates free-run oscillation signal identical with target oscillator signal for controlling superconductor cavity, and detect the free-run oscillation signal of superconductor cavity generation, and control tunable superconductor resonator device and superconductor cavity is tuned, so that free-run oscillation signal is identical as target oscillator signal.So that stable free-run oscillation signal can be generated in superconductor cavity, the reliability of the accelerator using superconductor cavity is improved.
Description
Technical field
The present embodiments relate to particle acceleration technique more particularly to a kind of self-excitation stability contorting sides of accelerator superconductor cavity
Method, system and storage medium.
Background technology
Superconducting accelerator is the accelerator built up with the main magnet of the accelerating cavity of superconductivity or superconductivity.Wherein, using super
Very strong accelerating field can be generated under the microwave power of very little by leading accelerating cavity, can reduce the size of accelerator significantly, be reduced
The power consumption of accelerator makes superconducting accelerator economically and technically have huge superiority.
Superconductor cavity have high quality factor (Q values), generally higher than 109.High Q values mean narrow bandwidth of operation,
Therefore the resonant frequency of superconductor cavity is needed to stablize.But superconductor cavity is very sensitive to the variation of cavity resonant frequency itself, the change of temperature
Change and chatter all can cause the resonant frequency of superconductor cavity to change, is very easy to the resonant frequency occurred drift.In addition, line
The high frequency power stored in superconductor cavity can be taken away during being accelerated by superconductor cavity, to cause cavity electric field to decline.Superconduction
The fluctuation of electric field amplitude in cavity, phase prevents subsequent beam group from effectively being accelerated, and is had an impact to quality of beam.
Therefore, how according to high q-factor superconductor cavity the characteristics of, the frequency, amplitude, phase of accelerator superconductor cavity are stablized
Control, is a problem to be solved.
Invention content
The present invention provides a kind of self-excitation stable control method, system and the storage medium of accelerator superconductor cavity so that superconduction
Intracavitary can generate stable free-run oscillation signal, improve the reliability of the accelerator using superconductor cavity.
In a first aspect, an embodiment of the present invention provides a kind of self-excited oscillation type radio frequency stability contorting systems of accelerator superconductor cavity
System, including：External reference source, controller combination, amplifier, directional coupler, superconductor cavity and tunable superconductor resonator device；
The external reference source is connect with the controller combination, and the external reference source is for generating the superconductor cavity
Target oscillator signal；
The controller combination generates self-oscillation identical with the target oscillator signal for controlling the superconductor cavity
Signal；
The amplifier is connect with the controller combination, after the amplifier is used to amplify the free-run oscillation signal
Input the directional coupler；
The directional coupler is connected between the amplifier and the superconductor cavity, and the directional coupler is for detecting
The power of the amplifier input signal and the superconduction cavity reflection signal, and testing result is fed back into the controller group
It closes；
The controller combination is also connect with the superconductor cavity, the self-oscillation letter generated for detecting the superconductor cavity
Number, and control the tunable superconductor resonator device and the superconductor cavity is tuned, so that the free-run oscillation signal and the mesh
It is identical to mark oscillator signal.
In a kind of possible realization method of first aspect, the controller combination includes self-oscillating control loop, amplitude tune
Humorous loop, frequency tuning loop and planet phasing loop；
The self-oscillating control loop generates free-run oscillation signal for controlling the superconductor cavity；
The amplitude tuning loops are used for according to the free-run oscillation signal detected from the superconductor cavity, and control is described from exciting
The amplitude for swinging signal is identical as the target oscillator signal；
The planet phasing loop is used for according to the free-run oscillation signal detected from the superconductor cavity, and control is described from exciting
The phase for swinging signal is identical as the target oscillator signal；
The frequency tuning loop is used to, according to the signal fed back from the directional coupler, control the tunable superconductor resonator
Device carries out mechanical tuning to the size of the superconductor cavity, so that the free-run oscillation signal frequency and the target oscillator signal
Frequency is identical.
In a kind of possible realization method of first aspect, the self-oscillating control loop includes quadrature modulator, signal mode
Formula selector, attenuator and phase shifter, the quadrature modulator are produced from exciting by the signal mode selector after the power is turned on
Signal is swung, the free-run oscillation signal inputs the superconductor cavity after amplifying by the amplifier；
The amplitude tuning loops include amplitude discriminator, attenuator and amplitude tuning controller, described in the amplitude discriminator detection
The amplitude for the free-run oscillation signal that superconductor cavity generates, the amplitude tuning controller is by the amplitude of the free-run oscillation signal and institute
The amplitude for stating reference signal is compared, and is controlled the attenuator and changed attenuation amplitude, so that the free-run oscillation signal
Amplitude is identical as the target oscillator signal；
The planet phasing loop includes the first phase discriminator, phase shifter and planet phasing controller, first phase discriminator
Detect the phase for the free-run oscillation signal that the superconductor cavity generates, the planet phasing controller is by the free-run oscillation signal
Phase is compared with the phase of the reference signal, and is controlled the phase shifter and changed amount of phase shift, so that the self-oscillation
The phase of signal is identical as the target oscillator signal；
The frequency tuning loop includes the second phase discriminator and frequency tuning control, described in second phase discriminator detection
The phase for the free-run oscillation signal that superconductor cavity generates, the input that the frequency tuning control is fed back according to the directional coupler
The phase difference of the phase of signal and reflection signal power and the free-run oscillation signal and the reference signal, described in control
Tunable superconductor resonator device carries out mechanical tuning to the size of the superconductor cavity, so that the free-run oscillation signal frequency and the mesh
It is identical to mark oscillation signal frequency.
In a kind of possible realization method of first aspect, the controller combination, specifically for starting in the system
When work, controls the amplitude tuning loops, the frequency tuning loop and the planet phasing loop and be off, institute
It states self-oscillating control loop and controls the superconductor cavity generation free-run oscillation signal first；
It controls the frequency tuning loop again to be closed, the frequency tuning loop controls the phase of the free-run oscillation signal
It is identical as the target oscillator signal；
It finally controls the amplitude tuning loops and the planet phasing loop is closed, the amplitude tuning loops control again
The amplitude of the free-run oscillation signal is identical as the target oscillator signal, and the planet phasing loop finally controls the self-excitation
The phase of oscillator signal is identical as the target oscillator signal.
Second aspect, the embodiment of the present invention additionally provide a kind of self-excited oscillation type radio frequency stability contorting of accelerator superconductor cavity
Method, including：
Control the target oscillator signal that external reference source generates superconductor cavity；
It controls the superconductor cavity and generates free-run oscillation signal identical with the target oscillator signal；
Control amplifier inputs directional coupler after amplifying the free-run oscillation signal；
Control the power that the directional coupler detects the amplifier input signal and the superconduction cavity reflection signal；
The free-run oscillation signal that the superconductor cavity generates is detected, and the superconductor cavity is tuned, so that the self-excitation
Oscillator signal is identical as the target oscillator signal.
In a kind of possible realization method of second aspect, the free-run oscillation signal that the detection superconductor cavity generates,
And the superconductor cavity is tuned, so that the free-run oscillation signal is identical as the target oscillator signal, including：
According to the free-run oscillation signal detected from the superconductor cavity, the amplitude of the free-run oscillation signal and the mesh are controlled
It is identical to mark oscillator signal, according to the free-run oscillation signal detected from the superconductor cavity, controls the phase of the free-run oscillation signal
It is identical as the target oscillator signal, according to the signal fed back from the directional coupler, the size of the superconductor cavity is carried out
Mechanical tuning, so that the free-run oscillation signal frequency is identical as the target oscillation signal frequency.
In a kind of possible realization method of second aspect, the free-run oscillation signal that the detection superconductor cavity generates,
And the superconductor cavity is tuned, so that the free-run oscillation signal is identical as the target oscillator signal, including：
The amplitude for detecting the free-run oscillation signal that the superconductor cavity generates, by the amplitude of the free-run oscillation signal with it is described
The amplitude of reference signal is compared, and changes attenuation amplitude, so that the amplitude of the free-run oscillation signal is shaken with the target
It is identical to swing signal；The phase for detecting the free-run oscillation signal that the superconductor cavity generates, by the phase of the free-run oscillation signal with
The phase of the reference signal is compared, and changes amount of phase shift, so that the phase of the free-run oscillation signal and the target
Oscillator signal is identical；The phase for detecting the free-run oscillation signal that the superconductor cavity generates, according to directional coupler feedback
The phase difference of the phase of input signal and reflection signal power and the free-run oscillation signal and the reference signal, to institute
The size for stating superconductor cavity carries out mechanical tuning, so that the free-run oscillation signal frequency and the target oscillation signal frequency phase
Together.
The third aspect, the embodiment of the present invention additionally provide a kind of computer readable storage medium, are stored thereon with computer
Program, which is characterized in that realized as described in any possible realization method of second aspect when the program is executed by processor
The self-excited oscillation type radio frequency stable control method of accelerator superconductor cavity.
Self-excitation stable control method, system and the storage medium of accelerator superconductor cavity provided in an embodiment of the present invention, including：
External reference source, controller combination, amplifier, directional coupler, superconductor cavity and tunable superconductor resonator device；Wherein, the outside
Reference source is connect with the controller combination, and the external reference source is used to generate the target oscillator signal of the superconductor cavity, institute
Amplifier is stated to connect with the controller combination, it is defeated after the signal amplification that the amplifier is used to export the controller combination
Enter the directional coupler, the directional coupler is connected between the amplifier and the superconductor cavity, the directional couple
Device is used to detect the power of the amplifier input signal and the superconduction cavity reflection signal, and testing result is fed back to described
Controller combination, the controller combination are identical with the target oscillator signal from exciting for controlling the superconductor cavity generation
Signal is swung, the controller combination is also connect with the superconductor cavity, the free-run oscillation signal generated for detecting the superconductor cavity,
And control the tunable superconductor resonator device and the superconductor cavity is tuned, so that the free-run oscillation signal shakes with the target
It is identical to swing signal so that can generate stable free-run oscillation signal in superconductor cavity, improve using superconductor cavity accelerator can
By property.
Description of the drawings
Fig. 1 is the self-excited oscillation type radio frequency stabilizing control system embodiment of accelerator superconductor cavity provided in an embodiment of the present invention
One structural schematic diagram；
Fig. 2 be accelerator superconductor cavity provided in an embodiment of the present invention self-excited oscillation type radio frequency stabilizing control system in control
The structural schematic diagram of device combination；
Fig. 3 is the self-excited oscillation type radio frequency stable control method embodiment of accelerator superconductor cavity provided in an embodiment of the present invention
One flow chart.
Specific implementation mode
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limitation of the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Quality factor (Q values) are the dimensionless groups in physics and engineering, are the physical quantitys for identifying oscillator damping property,
It can indicate size of the resonant frequency relative to bandwidth of oscillator.The rate that high q-factor identifies oscillator energy loss is slower, and vibration can
Continue longer time.For the higher oscillator of Q values in resonance, the amplitude near resonant frequency is larger, but the resonance that will produce
Frequency range it is smaller, this frequency range is properly termed as bandwidth.
In high-energy physics example accelerator field, there is a kind of special superconduction cavity, superconductor cavity be operated in ultra low temperature and
Under high vacuum state, such cavity has high quality factor.The natural quality factor Q of frequency cavity0It is to weigh intracavitary energy storage
It is the ratio being lost in cavity impedance in intracavitary energy storage and unit period, quality factor q with a kind of quality index of energy consumption0And chamber
Resonance frequency omega0Between there are following relationships：R is equivalent resistance, and L is cavity equivalent inductance.And according to quality
The characteristics of factor, high Q values mean very narrow bandwidth of operation, and due to superconductor cavity to the variation of cavity resonant frequency itself very
Sensitivity, and the quality of beam that the variation of superconduction intra-cavity frequency can accelerate intracavitary superconductor cavity has an impact.Therefore, it is necessary to be directed to
High q-factor superconductor cavity designs a kind of control system and control method of stabilization, to realize the stabilization of superconductor cavity.
Fig. 1 is the self-excited oscillation type radio frequency stabilizing control system embodiment of accelerator superconductor cavity provided in an embodiment of the present invention
One structural schematic diagram, as shown in Figure 1, the self-excited oscillation type radio frequency of accelerator superconductor cavity provided in an embodiment of the present invention stablizes control
System processed, including：External reference source 11, controller combination 12, amplifier 13, directional coupler 14, superconductor cavity 15 and superconductor cavity
Tuner 16.
Wherein, external reference source 11 is connect with controller combination 12, and external reference source 11 is used to generate the mesh of superconductor cavity 15
Mark oscillator signal.In order to make superconductor cavity 15 generate the oscillator signal of required frequency, amplitude and phase, need to configure outside superconductor cavity
One external reference source 11, external reference source 11 are that can generate the stable oscillator signal of frequency, amplitude and phase.Outside ginseng
The target oscillator signal for examining the generation of source 11 is consistent with the oscillator signal needed for superconductor cavity 15.External reference source 11 can be any
The signal source of adjustable output signal frequency, amplitude and phase.
Controller combination 12 is identical as the target oscillator signal that external reference source 11 generates for controlling the generation of superconductor cavity 15
Free-run oscillation signal.Since superconductor cavity 15 is very sensitive to the variation of resonant frequency, it is therefore desirable to generate width in superconductor cavity 15
The all highly stable free-run oscillation signal of degree, phase, frequency.Controller combination 12 by the combination of a series of control loop,
So that stable electric field can be generated in superconductor cavity 15.In order to make that stable free-run oscillation signal can be generated in superconductor cavity 15,
The target oscillator signal for generating the free-run oscillation signal that superconductor cavity 15 generates with external reference source 11 is needed to compare.So
Controller combination 12 just needs to connect with superconductor cavity 15, the free-run oscillation signal that detection superconductor cavity 15 generates, due to external reference
Source 11 can generate the stable oscillator signal of frequency, amplitude and phase, the free-run oscillation signal that generates superconductor cavity 15 with
After the target oscillator signal that external reference source 11 generates is compared, controller combination 12 can control tunable superconductor resonator device
16 pairs of superconductor cavities 15 are tuned, so that free-run oscillation signal is identical as target oscillator signal.Due to superconductor cavity 15 be operated in it is super
Under low temperature and high vacuum state, the Q values of superconduction cavity are high, can reach tens thousand of, for the normal work of superconductor cavity, need
The working frequency of cavity is locked by mechanical tuning, therefore, tunable superconductor resonator device 16 is preferably mechanical tuning device, is led to
The mechanical dimension for crossing change superconductor cavity 15 is tuned superconductor cavity 15.
Amplifier 13 is connect with the controller combination 12, and the amplifier 13 is for amplifying the free-run oscillation signal
After input the directional coupler 14.Superconductor cavity 15 therefore is generated in superconductor cavity 15 to carry out particle accelerated test
The amplitude needs of free-run oscillation signal are sufficiently large, and the initial oscillation signal amplitude generated in controller combination 12 all will not be too
Greatly, it therefore, it is necessary to increase amplifier 13 after controller combination 12, is inputted after the signal amplification exported to controller combination 12 super
Guide cavity 15.The working frequency of amplifier 13 is arranged according to the working frequency of superconductor cavity 15.
Between amplifier 13 and superconductor cavity 15, it is also associated with the directional coupler 14.Directional coupler 14 is for examining
It surveys 13 input signal of the amplifier and the superconductor cavity 15 reflects the power of signal, and testing result is fed back into the control
Device combination 12.The process that the free-run oscillation signal generated in superconductor cavity 15 is adjusted in controller combination 12 is a closed loop tune
The process of section needs, by the detection to free-run oscillation signal in superconductor cavity 15, in real time to adjust the parameter in whole system
It is whole, to make free-run oscillation signal gradually tend towards stability.Directional coupler 14 is exactly one of detection and regulating device, is put
After power distribution of the signal that big device 13 exports by directional coupler 14, superconductor cavity 15, while directional coupler 14 can be inputted
The reflection signal that superconductor cavity 15 is sent out can also be received.The power for reflecting signal is sent to controller group by directional coupler 14
Conjunction 12, the power for the reflection signal that controller combination 12 is sent out according to the signal power and superconductor cavity 15 of input superconductor cavity 15, energy
Enough calculate the reflectance factor of superconductor cavity 15.Directional coupler 14 is adjusted according to the reflectance factor of superconductor cavity 15, to
The reflectance factor of superconductor cavity 15 can be made to reach setting value.
The self-excited oscillation type radio frequency stabilizing control system of accelerator superconductor cavity provided in an embodiment of the present invention, including：It is external
Reference source, controller combination, amplifier, directional coupler, superconductor cavity and tunable superconductor resonator device；Wherein, the external reference
Source is connect with the controller combination, and the external reference source is used to generate the target oscillator signal of the superconductor cavity, described to put
Big device is connect with the controller combination, and the amplifier is used to input institute after amplifying the signal that the controller combination exports
Directional coupler is stated, the directional coupler is connected between the amplifier and the superconductor cavity, and the directional coupler is used
In the power of the detection amplifier input signal and the superconduction cavity reflection signal, and testing result is fed back into the control
Device combines, and the controller combination generates self-oscillation letter identical with the target oscillator signal for controlling the superconductor cavity
Number, the controller combination is also connect with the superconductor cavity, the free-run oscillation signal generated for detecting the superconductor cavity, and is controlled
It makes the tunable superconductor resonator device to be tuned the superconductor cavity, so that the free-run oscillation signal is believed with target oscillation
It is number identical so that stable free-run oscillation signal can be generated in superconductor cavity, improve the reliability of the accelerator using superconductor cavity.
In the embodiment shown in fig. 1, controller combination 12 is believed for controlling the superconductor cavity and generating with target oscillation
Number identical free-run oscillation signal, and the free-run oscillation signal that the superconductor cavity generates is detected, control the tunable superconductor resonator dress
It sets and the superconductor cavity is tuned, so that the free-run oscillation signal is identical as the target oscillator signal.This be one compared with
For complicated process, as soon as and be a closed loop adjustment process, below to the concrete structure and workflow of controller combination 12
It is further elaborated.
Fig. 2 be accelerator superconductor cavity provided in an embodiment of the present invention self-excited oscillation type radio frequency stabilizing control system in control
The structural schematic diagram of device combination, as shown in Fig. 2, controller combination 12 includes：Self-oscillating control loop 21, amplitude tuning loops 22,
Frequency tuning loop 23 and planet phasing loop 24.
The self-oscillating control loop 21 generates free-run oscillation signal for controlling the superconductor cavity 15.Superconductor cavity 15 is produced from
Sharp condition is that loop gain is more than 1, and loop phase difference is equal to 2 π N, loop here refer in Fig. 1 by controller combination 12,
The loop that amplifier 13, directional coupler 14 and superconductor cavity 15 form.After entire RF cycle is added some points, when the phase for meeting self-excitation
When position and gain condition, loop will form self-oscillation.Since the self-oscillatory amplitude that loop generates is uncertain,
In order to avoid damaging amplifier 13 during loop self-excited, controller combination 12 needs to carry out self-oscillatory range signal
Limitation.Specifically, can clipping element be set in controller combination 12, controlling superconductor cavity 15 in controller combination 12 is produced from
The amplitude of free-run oscillation signal is limited when swashing.
Specifically, self-oscillating control loop 21 can be by quadrature modulator 211, signal mode selector 212, attenuator 213
It is formed with phase shifter 214.The quadrature modulator 211 generates self-oscillation by the signal mode selector 212 after the power is turned on
Signal, the free-run oscillation signal input the superconductor cavity 15 after amplifying by the amplifier 13.Certainly after amplifier 13
Further include directional coupler 14, directional coupler 14 is not shown in fig. 2.
The amplitude tuning loops 22 are for according to the free-run oscillation signal detected from the superconductor cavity 15, control to be described certainly
The amplitude of Induced Oscillation signal is identical as the target oscillator signal.Amplitude tuning loops 22 by amplitude discriminator in cavity from exciting
It swings signal amplitude to be detected, determines whether the amplitude of free-run oscillation signal is identical as target oscillator signal, if it is different, then adjusting
The attenuation of attenuator in loop, it is 0 to make range error, i.e., loop gain is 1.Before loop does not have resonance, superconductor cavity 15
Working frequency not in the centre frequency of superconductor cavity 15, therefore sufficiently high loop gain cannot be provided, it is therefore desirable to will decline
Subtract device and is placed in minimal attenuation amount.
Specifically, the amplitude tuning loops 22 can be by amplitude discriminator 215, attenuator 213 and amplitude tuning controller
216, the amplitude discriminator 215 detects the amplitude of the free-run oscillation signal of the generation of the superconductor cavity 15, the amplitude tuning controller
216 are compared the amplitude of the free-run oscillation signal with the amplitude of the reference signal, and control the attenuator 213 and change
Become attenuation amplitude, so that the amplitude of the free-run oscillation signal is identical as the target oscillator signal.Amplitude tuning controller 216
Can be ratio, integral, differential (Proportion Integral Derivative, PID) controller.
The planet phasing loop 23 is for according to the free-run oscillation signal detected from the superconductor cavity 15, control to be described certainly
The phase of Induced Oscillation signal is identical as the target oscillator signal.Planet phasing loop 23 by phase discriminator in cavity from exciting
It swings signal phase to be detected, determines whether the phase of free-run oscillation signal is identical as target oscillator signal, if it is different, then adjusting
The amount of phase shift of phase shifter in loop, it is 0 to make phase error.
The planet phasing loop 23 includes the first phase discriminator 217, phase shifter 214 and planet phasing controller 218, described
First phase discriminator 217 detects the phase of the free-run oscillation signal of the generation of the superconductor cavity 15, and the planet phasing controller 218 will
The phase of the free-run oscillation signal is compared with the phase of the reference signal, and is controlled the phase shifter 214 and changed shifting
Phasor, so that the phase of the free-run oscillation signal is identical as the target oscillator signal.Planet phasing controller 218 can be
PID controller.
The frequency tuning loop 24 is used to, according to the signal fed back from the directional coupler 15, control the superconductor cavity
Tuner 16 carries out mechanical tuning to the size of the superconductor cavity 15, so that the free-run oscillation signal frequency and the target
Oscillation signal frequency is identical.After carrying out mechanical tuning to the size of superconductor cavity 15, the mechanical dimension of superconductor cavity 15 can change
Become, the intrinsic frequency of superconductor cavity 15 can change so that the phase condition of the free-run oscillation signal generated in superconductor cavity 15
It is destroyed, then just needing to reset relevant operating parameter in controller combination 12, so that superconductor cavity 15 is new
Free-run oscillation signal is regenerated in frequency.By repetitive control tunable superconductor resonator device 16, it can make entire loop oneself
The frequency of Induced Oscillation signal is consistent with target oscillator signal.
The frequency tuning loop 24 includes the second phase discriminator 219 and frequency tuning control 220, second phase discriminator
The phase for the free-run oscillation signal that the 219 detection superconductor cavities 15 generate, the frequency tuning control 220 is according to the orientation
Input signal and the phase of reflection signal power and the free-run oscillation signal and the reference signal that coupler 14 is fed back
Phase difference, control the tunable superconductor resonator device 16 and mechanical tuning carried out to the size of the superconductor cavity 15 so that it is described from
Induced Oscillation signal frequency is identical as the target oscillation signal frequency.Frequency tuning control 220 can be PID controller.
When the frequency and amplitude of electromagnetic field in superconductor cavity 15 are all identical as target oscillator signal, entire loop need into
Row fixed ampllitude locking phase.After fixed ampllitude locking phase, the phase in loop is changed by the parameter of the setting phase shifter of planet phasing loop 23, is surpassed
The phase of electromagnetic field changes correspondingly in guide cavity 15, is changed correspondingly by the energization of the particle of superconductor cavity 15, " is moved it is possible thereby to be formed
Setting phase-energization of phase device " curve can complete phase shifter in conjunction with 15 operating phase of superconductor cavity that beam dynamics provides
Setting.After the operating phase of superconductor cavity 15 is provided with, superconductor cavity 15 enter normal operating condition, i.e., particle it is anticipated that by
Accelerate.
Controller combination 12 is in system starts, it is necessary first to so that superconductor cavity is generated free-run oscillation signal, to make to surpass
15 normal operation of guide cavity, controller combination 12 and entire loop work are needed in frequency, amplitude and the controllable self-excitation mode of phase
Meet following function and index：Best self-oscillatory function is automatically obtained, that is, automatically adjusting the phase of loop and gain makes
Loop meets self-exciting contion and vibrates, and the oscillation amplitude for making its superconductor cavity 15 export is maximum.The control of 14 position of directional coupler
Function processed, i.e., after given reflectance factor, directional coupler 14 can be adjusted to correct position.Directional coupler 14 obtains preceding traveling wave
Directional coupler 14 is controlled with this, reflectance factor is made to reach setting value to calculate reflectance factor with the power of back wave.
The process is related to the change of loop intrinsic frequency, self-exciting contion is destroyed, it is therefore desirable to re-establish self-exciting contion, that is, need
It uses " automatically obtaining maximum self-oscillatory function ".Tuning control makes loop that is, by controlling tunable superconductor resonator device 16
Intrinsic frequency it is consistent with signal source frequency, and form best self-oscillation.The process is related to changing for loop intrinsic frequency
Become, self-exciting contion is destroyed, it is therefore desirable to re-establish self-exciting contion, that is, use is needed " to automatically obtain maximum self-oscillation
Function ".Self-oscillation-reflectance factor setting-tuning-fixed ampllitude locking phase, whole process are realized automatically.
The controller combination 12 starts work to make to generate required free-run oscillation signal in superconductor cavity 15 in the system
When making, span of control limit of control tuning loops 22, planet phasing loop 23 and frequency tuning loop 24 are off first, it is described from
Swash control loop 21 and controls the generation free-run oscillation signal of the superconductor cavity 15 first.Specifically, it first sets power set point to
Low-power exports, and then loop is closed, and the output of controller combination 12 at this time is controlled by power set point, can pass through the control
Voltage processed adjusts output power.Before loop does not have resonance, the working frequency of superconductor cavity 15 is not or not the center of superconductor cavity 15
In frequency, therefore sufficiently high loop gain cannot be provided, it is therefore desirable to which the attenuator 213 of radio circuit leading portion is placed in minimum
Attenuation.Then the frequency tuning loop 24 is controlled again to be closed, and the resonant frequency point of superconductor cavity 15 is adjusted according to phase error,
The phase for controlling the free-run oscillation signal is identical as the target oscillator signal, keeps loop work defeated in the maximum of superconductor cavity 15
On going out.The phase-shift phase of phase shifter 214 is adjusted, while adjusting the attenuation of attenuator 213, so that loop work is more than 1 in gain, phase
Under conditions of position approximation is with phase, loop self-excited work success at this time.It adjusts attenuator 213 and phase shifter 214 again at this time, makes self-excitation
The range error and phase error of oscillator signal and target oscillator signal are all 0.Finally control 22 He of amplitude tuning loops
The planet phasing loop 23 is respectively closed, and range error and phase error may deviate zero at this time, is decayed by finely tuning
Device 222 and phase shifter 232 make range error and phase error back to zero, that is, control the amplitude of the free-run oscillation signal with it is described
Target oscillator signal is identical, and the phase for controlling the free-run oscillation signal is identical as the target oscillator signal.
Fig. 3 is the self-excited oscillation type radio frequency stable control method embodiment of accelerator superconductor cavity provided in an embodiment of the present invention
One flow chart, as shown in figure 3, method provided in this embodiment includes：
Step S301, control external reference source generate the target oscillator signal of superconductor cavity.
Step S302 controls the superconductor cavity and generates free-run oscillation signal identical with the target oscillator signal.
Step S303, control amplifier input directional coupler after amplifying the free-run oscillation signal.
Step S304 controls the directional coupler and detects the amplifier input signal and the superconduction cavity reflection signal
Power.
Step S305 detects the free-run oscillation signal that the superconductor cavity generates, and is tuned to the superconductor cavity, so that
The free-run oscillation signal is identical as the target oscillator signal.
The self-excited oscillation type radio frequency stable control method of accelerator superconductor cavity provided in this embodiment is used for shown in FIG. 1
The self-excited oscillation type radio frequency stabilizing control system of accelerator superconductor cavity is controlled, and wherein this method is by the controller group in Fig. 1
Performed by conjunction.The specific controlling party of the self-excited oscillation type radio frequency stable control method for the accelerator superconductor cavity that the present embodiment is provided
Method has been carried out absolutely prove in the embodiment shown in fig. 1, and details are not described herein again.
Further, on the basis of embodiment shown in Fig. 3, step S305, the detection superconductor cavity generate from
Induced Oscillation signal, and the superconductor cavity is tuned, so that the free-run oscillation signal is identical as the target oscillator signal,
Including：According to the free-run oscillation signal detected from the superconductor cavity, the amplitude of the free-run oscillation signal and the target are controlled
Oscillator signal is identical, according to the free-run oscillation signal detected from the superconductor cavity, control the phase of the free-run oscillation signal with
The target oscillator signal is identical, and according to the signal fed back from the directional coupler, machine is carried out to the size of the superconductor cavity
Tool tunes, so that the free-run oscillation signal frequency is identical as the target oscillation signal frequency.
Further, on the basis of embodiment shown in Fig. 3, step S305, the detection superconductor cavity generate from
Induced Oscillation signal, and the superconductor cavity is tuned, so that the free-run oscillation signal is identical as the target oscillator signal,
Including：The amplitude for detecting the free-run oscillation signal that the superconductor cavity generates, by the amplitude of the free-run oscillation signal and the ginseng
The amplitude for examining signal is compared, and changes attenuation amplitude, so that the amplitude of the free-run oscillation signal is vibrated with the target
Signal is identical；The phase for detecting the free-run oscillation signal that the superconductor cavity generates, by the phase of the free-run oscillation signal and institute
The phase for stating reference signal is compared, and changes amount of phase shift, so that the phase of the free-run oscillation signal is shaken with the target
It is identical to swing signal；The phase for detecting the free-run oscillation signal that the superconductor cavity generates, according to the defeated of directional coupler feedback
The phase difference for entering the phase and the reference signal of signal and reflection signal power and the free-run oscillation signal, to described
The size of superconductor cavity carries out mechanical tuning, so that the free-run oscillation signal frequency is identical as the target oscillation signal frequency.
The embodiment of the present invention also provides a kind of storage medium including computer executable instructions, and the computer is executable
Instruction by computer processor when being executed for executing a kind of self-excited oscillation type radio frequency stability contorting side of accelerator superconductor cavity
Method, this method include：
Control the target oscillator signal that external reference source generates superconductor cavity；
It controls the superconductor cavity and generates free-run oscillation signal identical with the target oscillator signal；
Control amplifier inputs directional coupler after amplifying the free-run oscillation signal；
Control the power that the directional coupler detects the amplifier input signal and the superconduction cavity reflection signal；
The free-run oscillation signal that the superconductor cavity generates is detected, and the superconductor cavity is tuned, so that the self-excitation
Oscillator signal is identical as the target oscillator signal.
Certainly, a kind of storage medium including computer executable instructions that the embodiment of the present invention is provided, computer
The method operation that executable instruction is not limited to the described above, it is super to can also be performed the accelerator that any embodiment of the present invention is provided
Relevant operation in the self-excited oscillation type radio frequency stable control method of guide cavity
By the description above with respect to embodiment, it is apparent to those skilled in the art that, the present invention
It can be realized by software and required common hardware, naturally it is also possible to which by hardware realization, but the former is more in many cases
Good embodiment.Based on this understanding, technical scheme of the present invention substantially in other words contributes to the prior art
Part can be expressed in the form of software products, which can be stored in computer readable storage medium
In, such as the floppy disk of computer, read-only memory (Read-Only Memory, ROM), random access memory (Random
Access Memory, RAM), flash memory (FLASH), hard disk or CD etc., including some instructions are with so that a computer is set
Standby (can be personal computer, server or the network equipment etc.) executes the method described in each embodiment of the present invention.
Note that above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The present invention is not limited to specific embodiments described here, can carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out to the present invention by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
May include other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.
Claims (8)
1. a kind of self-excited oscillation type radio frequency stabilizing control system of accelerator superconductor cavity, which is characterized in that including：External reference
Source, controller combination, amplifier, directional coupler, superconductor cavity and tunable superconductor resonator device；
The external reference source is connect with the controller combination, and the external reference source is used to generate the target of the superconductor cavity
Oscillator signal；
The controller combination generates free-run oscillation signal identical with the target oscillator signal for controlling the superconductor cavity；
The amplifier is connect with the controller combination, and the amplifier is used to after amplifying the free-run oscillation signal input
The directional coupler；
The directional coupler is connected between the amplifier and the superconductor cavity, and the directional coupler is described for detecting
The power of amplifier input signal and the superconduction cavity reflection signal, and testing result is fed back into the controller combination；
The controller combination is also connect with the superconductor cavity, the free-run oscillation signal generated for detecting the superconductor cavity, and
It controls the tunable superconductor resonator device to be tuned the superconductor cavity, so that the free-run oscillation signal is vibrated with the target
Signal is identical.
2. system according to claim 1, which is characterized in that the controller combination includes self-oscillating control loop, amplitude
Tuning loops, frequency tuning loop and planet phasing loop；
The self-oscillating control loop generates free-run oscillation signal for controlling the superconductor cavity；
The amplitude tuning loops are used to, according to the free-run oscillation signal detected from the superconductor cavity, control the self-oscillation letter
Number amplitude it is identical as the target oscillator signal；
The planet phasing loop is used to, according to the free-run oscillation signal detected from the superconductor cavity, control the self-oscillation letter
Number phase it is identical as the target oscillator signal；
The frequency tuning loop is used to, according to the signal fed back from the directional coupler, control the tunable superconductor resonator device
Mechanical tuning is carried out to the size of the superconductor cavity, so that the free-run oscillation signal frequency and the target oscillation signal frequency
It is identical.
3. system according to claim 2, which is characterized in that the self-oscillating control loop includes quadrature modulator, signal
Mode selector, attenuator and phase shifter, the quadrature modulator generate self-excitation by the signal mode selector after the power is turned on
Oscillator signal, the free-run oscillation signal input the superconductor cavity after amplifying by the amplifier；
The amplitude tuning loops include amplitude discriminator, attenuator and amplitude tuning controller, and the amplitude discriminator detects the superconduction
The amplitude for the free-run oscillation signal that chamber generates, the amplitude tuning controller is by the amplitude of the free-run oscillation signal and the ginseng
The amplitude for examining signal is compared, and is controlled the attenuator and changed attenuation amplitude, so that the amplitude of the free-run oscillation signal
It is identical as the target oscillator signal；
The planet phasing loop includes the first phase discriminator, phase shifter and planet phasing controller, the first phase discriminator detection
The phase for the free-run oscillation signal that the superconductor cavity generates, the planet phasing controller is by the phase of the free-run oscillation signal
It is compared with the phase of the reference signal, and controls the phase shifter and change amount of phase shift, so that the free-run oscillation signal
Phase it is identical as the target oscillator signal；
The frequency tuning loop includes the second phase discriminator and frequency tuning control, and second phase discriminator detects the superconduction
The phase for the free-run oscillation signal that chamber generates, the input signal that the frequency tuning control is fed back according to the directional coupler
And the phase difference of the phase of reflection signal power and the free-run oscillation signal and the reference signal, control the superconduction
Chamber tuner carries out mechanical tuning to the size of the superconductor cavity, so that the free-run oscillation signal frequency is shaken with the target
It is identical to swing signal frequency.
4. system according to claim 2 or 3, which is characterized in that the controller combination is specifically used in the system
When start-up operation, controls the amplitude tuning loops, the frequency tuning loop and the planet phasing loop and be in disconnection shape
State, the self-oscillating control loop control the superconductor cavity and generate free-run oscillation signal first；
It controls the frequency tuning loop again to be closed, the frequency tuning loop controls phase and the institute of the free-run oscillation signal
It is identical to state target oscillator signal；
It finally controls the amplitude tuning loops and the planet phasing loop is closed, the amplitude tuning loops control described again
The amplitude of free-run oscillation signal is identical as the target oscillator signal, and the planet phasing loop finally controls the self-oscillation
The phase of signal is identical as the target oscillator signal.
5. a kind of self-excited oscillation type radio frequency stable control method of accelerator superconductor cavity, which is characterized in that including：
Control the target oscillator signal that external reference source generates superconductor cavity；
It controls the superconductor cavity and generates free-run oscillation signal identical with the target oscillator signal；
Control amplifier inputs directional coupler after amplifying the free-run oscillation signal；
Control the power that the directional coupler detects the amplifier input signal and the superconduction cavity reflection signal；
The free-run oscillation signal that the superconductor cavity generates is detected, and the superconductor cavity is tuned, so that the self-oscillation
Signal is identical as the target oscillator signal.
6. according to the method described in claim 5, it is characterized in that, the self-oscillation letter that the detection superconductor cavity generates
Number, and the superconductor cavity is tuned, so that the free-run oscillation signal is identical as the target oscillator signal, including：
According to the free-run oscillation signal detected from the superconductor cavity, the amplitude and the target that control the free-run oscillation signal are shaken
It swings that signal is identical, according to the free-run oscillation signal detected from the superconductor cavity, controls phase and the institute of the free-run oscillation signal
It states that target oscillator signal is identical, according to the signal fed back from the directional coupler, machinery is carried out to the size of the superconductor cavity
Tuning, so that the free-run oscillation signal frequency is identical as the target oscillation signal frequency.
7. according to the method described in claim 6, it is characterized in that, the self-oscillation letter that the detection superconductor cavity generates
Number, and the superconductor cavity is tuned, so that the free-run oscillation signal is identical as the target oscillator signal, including：
The amplitude for detecting the free-run oscillation signal that the superconductor cavity generates, by the amplitude of the free-run oscillation signal and the reference
The amplitude of signal is compared, and changes attenuation amplitude, so that the amplitude of the free-run oscillation signal is believed with target oscillation
It is number identical；The phase for detecting the free-run oscillation signal that the superconductor cavity generates, by the phase of the free-run oscillation signal with it is described
The phase of reference signal is compared, and changes amount of phase shift, so that the phase of the free-run oscillation signal is vibrated with the target
Signal is identical；The phase for detecting the free-run oscillation signal that the superconductor cavity generates, the input fed back according to the directional coupler
The phase difference of the phase of signal and reflection signal power and the free-run oscillation signal and the reference signal, to described super
The size of guide cavity carries out mechanical tuning, so that the free-run oscillation signal frequency is identical as the target oscillation signal frequency.
8. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is held by processor
The self-excited oscillation type radio frequency stable control method of the accelerator superconductor cavity as described in any in claim 5-7 is realized when row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810764751.9A CN108650771A (en) | 2018-07-12 | 2018-07-12 | Self-excitation stable control method, system and the storage medium of accelerator superconductor cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810764751.9A CN108650771A (en) | 2018-07-12 | 2018-07-12 | Self-excitation stable control method, system and the storage medium of accelerator superconductor cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108650771A true CN108650771A (en) | 2018-10-12 |
Family
ID=63751060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810764751.9A Pending CN108650771A (en) | 2018-07-12 | 2018-07-12 | Self-excitation stable control method, system and the storage medium of accelerator superconductor cavity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108650771A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114051309A (en) * | 2021-11-03 | 2022-02-15 | 北京航天广通科技有限公司分公司 | Control system and method for radio frequency power and amplitude of particle accelerator |
| CN115119377A (en) * | 2022-07-19 | 2022-09-27 | 无锡核力电科技术有限公司 | Method and system for quickly establishing stable radio frequency electric field by linear superconducting accelerating cavity |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104333375A (en) * | 2013-11-05 | 2015-02-04 | 河海大学 | Power source low-level all-digital amplitude phase control system for high-energy particle accelerator and implementation method thereof |
| CN105246242A (en) * | 2015-10-12 | 2016-01-13 | 中国科学院高能物理研究所 | Spoke superconducting cavity tuner |
| CN105282956A (en) * | 2015-10-09 | 2016-01-27 | 中国原子能科学研究院 | Intelligent self-starting method for high-frequency system of strong-current circular accelerator |
| CN205334122U (en) * | 2016-01-26 | 2016-06-22 | 北京长峰广播通讯设备有限责任公司 | A low level control system of digit for accelerator power source |
| CN106102299A (en) * | 2016-07-29 | 2016-11-09 | 中国原子能科学研究院 | A kind of high frequency D circuit of Dual Drive four resonant cavity |
| CN106211538A (en) * | 2016-09-26 | 2016-12-07 | 合肥中科离子医学技术装备有限公司 | The automatic tuning apparatus in a kind of cyclotron resonance chamber and method |
| CN106231777A (en) * | 2016-07-29 | 2016-12-14 | 中国原子能科学研究院 | A kind of signal source of high stability of superconducting cyclotron |
| CN107864548A (en) * | 2017-12-13 | 2018-03-30 | 合肥中科离子医学技术装备有限公司 | A kind of new superconductive cyclotron tunes system |
| CN108124373A (en) * | 2017-12-18 | 2018-06-05 | 合肥中科离子医学技术装备有限公司 | A kind of devices and methods therefor for being used to control superconducting cyclotron accelerating potential |
| CN108120888A (en) * | 2017-12-13 | 2018-06-05 | 合肥中科离子医学技术装备有限公司 | New cyclotron range stability measuring system |
-
2018
- 2018-07-12 CN CN201810764751.9A patent/CN108650771A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104333375A (en) * | 2013-11-05 | 2015-02-04 | 河海大学 | Power source low-level all-digital amplitude phase control system for high-energy particle accelerator and implementation method thereof |
| 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 |
| CN105282956A (en) * | 2015-10-09 | 2016-01-27 | 中国原子能科学研究院 | Intelligent self-starting method for high-frequency system of strong-current circular accelerator |
| CN105246242A (en) * | 2015-10-12 | 2016-01-13 | 中国科学院高能物理研究所 | Spoke superconducting cavity tuner |
| CN205334122U (en) * | 2016-01-26 | 2016-06-22 | 北京长峰广播通讯设备有限责任公司 | A low level control system of digit for accelerator power source |
| CN106102299A (en) * | 2016-07-29 | 2016-11-09 | 中国原子能科学研究院 | A kind of high frequency D circuit of Dual Drive four resonant cavity |
| CN106231777A (en) * | 2016-07-29 | 2016-12-14 | 中国原子能科学研究院 | A kind of signal source of high stability of superconducting cyclotron |
| CN106211538A (en) * | 2016-09-26 | 2016-12-07 | 合肥中科离子医学技术装备有限公司 | The automatic tuning apparatus in a kind of cyclotron resonance chamber and method |
| CN107864548A (en) * | 2017-12-13 | 2018-03-30 | 合肥中科离子医学技术装备有限公司 | A kind of new superconductive cyclotron tunes system |
| CN108120888A (en) * | 2017-12-13 | 2018-06-05 | 合肥中科离子医学技术装备有限公司 | New cyclotron range stability measuring system |
| CN108124373A (en) * | 2017-12-18 | 2018-06-05 | 合肥中科离子医学技术装备有限公司 | A kind of devices and methods therefor for being used to control superconducting cyclotron accelerating potential |
Non-Patent Citations (6)
| Title |
|---|
| ZHIGUO YIN ET AL.: "Design of RF system for CYCIAE-230 superconducting cyclotron", 《NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH A》 * |
| 慕振成等: "强流质子RFQ加速器高频数字低电平控制***", 《强激光与粒子束》 * |
| 文良华等: "基于FPGA 的高频全数字低电平***算法实现", 《嵌入式技术》 * |
| 殷治国等: "100MeV强流回旋加速器射频数字低电平***研制", 《高能物理与核物理》 * |
| 雷钰: "回旋加速器射频谐振腔自动锻炼***研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 高郑: "强流超导加速器低电平控制算法实验研究", 《中国博士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114051309A (en) * | 2021-11-03 | 2022-02-15 | 北京航天广通科技有限公司分公司 | Control system and method for radio frequency power and amplitude of particle accelerator |
| CN115119377A (en) * | 2022-07-19 | 2022-09-27 | 无锡核力电科技术有限公司 | Method and system for quickly establishing stable radio frequency electric field by linear superconducting accelerating cavity |
| CN115119377B (en) * | 2022-07-19 | 2023-12-19 | 国电投核力电科(无锡)技术有限公司 | Method and system for quickly establishing stable radio frequency electric field in linear superconducting accelerating cavity |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7157857B2 (en) | Stabilizing plasma and generator interactions | |
| JPH09289100A (en) | Rf plasma power source combined with technology for enhancing stability | |
| CN108650771A (en) | Self-excitation stable control method, system and the storage medium of accelerator superconductor cavity | |
| Saito et al. | RF accelerating system for a compact ion synchrotron | |
| CN115549618A (en) | Radio frequency control method, system and storage medium for high-Q-value superconducting cavity | |
| JP2010283678A (en) | Magnetron oscillator and plasma treatment device | |
| Dmitriev et al. | Experimental study of complex dynamics in a delayed-feedback multiple-cavity klystron self-oscillator | |
| Simrock | Achieving phase and amplitude stability in pulsed superconducting cavities | |
| Liu et al. | Multi-port cavity model and low-level RF systems design for VHF gun | |
| JP3697504B2 (en) | Microwave generator using magnetron frequency / phase control circuit and magnetron | |
| JP4022624B2 (en) | Microwave generator | |
| Hochschild et al. | Electronic tuning and phase control of superconducting helical resonators | |
| JP3891361B2 (en) | Frequency synthesizer | |
| CN115119377B (en) | Method and system for quickly establishing stable radio frequency electric field in linear superconducting accelerating cavity | |
| Cichalewski et al. | Continuous wave operation of superconducting accelerating cavities with high loaded quality factor | |
| KR101930440B1 (en) | Apparatus of supplying power for generating plasma | |
| Branlard et al. | Highlights of the XM-3 Cryomodule Tests at DESY | |
| US2667580A (en) | Magnetron with valence electrode | |
| Yin et al. | Design and desktop experiment of LLRF system for CYCIAE-230 superconducting cyclotron | |
| Frolov et al. | Analysis of the characteristics of a biharmonic oscillator with two synchronous modes | |
| Nusinovich et al. | Possible gyrotron operation in the “no start current” zone caused by the axial dependence of the phase of the resonator field | |
| Emel’yanov et al. | The mutual synchronization of coupled delayed feedback klystron oscillators | |
| US5982787A (en) | Rippled beam free electron laser amplifier | |
| Li et al. | Influence of beam-loaded effects on phase-locking in the high power microwave oscillator | |
| Bogachev et al. | Bifurcation Method in the Theory of Three-Circuit Oscillators with Stabilizing Cavities:(Classification and Optimization of Oscillating Systems and Modes) |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181012 |
|
| RJ01 | Rejection of invention patent application after publication |