WO2020107146A1 - Accélérateur de particules, procédé et appareil de détermination de l'énergie de particules sortant de ce dernier et support - Google Patents

Accélérateur de particules, procédé et appareil de détermination de l'énergie de particules sortant de ce dernier et support Download PDF

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Publication number
WO2020107146A1
WO2020107146A1 PCT/CN2018/117407 CN2018117407W WO2020107146A1 WO 2020107146 A1 WO2020107146 A1 WO 2020107146A1 CN 2018117407 W CN2018117407 W CN 2018117407W WO 2020107146 A1 WO2020107146 A1 WO 2020107146A1
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Prior art keywords
particle
phase
accelerator
pulse
particles
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PCT/CN2018/117407
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English (en)
Chinese (zh)
Inventor
刘铮铮
郑志鸿
李凯若
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新瑞阳光粒子医疗装备(无锡)有限公司
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Application filed by 新瑞阳光粒子医疗装备(无锡)有限公司 filed Critical 新瑞阳光粒子医疗装备(无锡)有限公司
Priority to CN201880002494.3A priority Critical patent/CN109661860A/zh
Priority to PCT/CN2018/117407 priority patent/WO2020107146A1/fr
Priority to CN201911102646.XA priority patent/CN110708856B/zh
Publication of WO2020107146A1 publication Critical patent/WO2020107146A1/fr

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    • 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
    • H05H2007/008—Arrangements for beam delivery or irradiation for measuring beam parameters

Definitions

  • the embodiments of the present application relate to medical equipment technology, for example, to a particle accelerator and a method, device, and medium for determining the energy of the particle extracted.
  • the measurement of particle energy usually adopts the indirect measurement method: the particle energy is reversed by measuring the magnetic field strength of the main and secondary magnets in the synchrotron, or the particle resonance power is measured by measuring the resonance frequency of the accelerating cavity energy.
  • the accuracy of the particle energy of the reverse thrust is low, resulting in the particle energy extracted by the particle accelerator and the actual needs of the patient.
  • the energy of the particles is poorly matched, increasing the risk of patient treatment.
  • the present application provides a particle accelerator and a method, device, and medium for determining the energy of particles extracted therefrom to improve the accuracy of determining the energy of particles extracted by the accelerator.
  • An embodiment of the present application provides a method for determining the energy of particles extracted by an accelerator, including:
  • the reference duration corresponding to the number of pulses of the sampled pulse signal received in the pulse counter when the reference pulse number M corresponds; wherein, the reference duration is obtained by summing the pulse periods of the M pulses;
  • the kinetic energy of the particles in the acceleration cavity is determined as the particle energy.
  • An embodiment of the present application further provides a device for determining the energy of particles extracted by an accelerator, including:
  • the reference duration acquisition module is set to acquire the reference duration corresponding to the number of pulses of the sampling pulse signal received in the pulse counter when the reference pulse number reaches the reference pulse number;
  • a movement speed determination module configured to determine the movement speed of the particles in the acceleration cavity according to the reference duration, the reference pulse number and the single pulse movement length; wherein, the single pulse movement length is the particle in one pulse period Length of movement
  • the particle energy determination module is configured to determine the kinetic energy of the particle in the acceleration cavity as the particle energy according to the movement speed and the rest mass of the particle.
  • An embodiment of the present application further provides a particle accelerator, including an injector, a beam chopper, and an accelerator synchronization ring, the injector is connected to one end of the beam chopper, and the other end of the beam chopper is connected to the accelerator
  • the synchronization loop is connected and also includes fast current transformers, analog-to-digital converters, pulse counters and controllers;
  • the fast current transformer is installed on the accelerator synchronization ring, and is configured to generate a pulse signal when particles pass, and send the pulse signal to the analog-to-digital converter;
  • the analog-to-digital converter is connected between the fast current transformer and the pulse counter, and is configured to sample the pulse signal according to a set frequency to obtain a sample pulse signal, and the sample pulse signal Sent to the pulse counter;
  • the pulse counter is connected between the fast current transformer and the controller, and is configured to count the number of pulses of the sampling pulse signal received within a preset reference time, and use the count result as a reference pulse Number, and send the reference pulse number to the controller;
  • the controller connected to the pulse counter, is configured to determine the movement speed of the particles in the acceleration cavity according to the preset reference time, the number of received reference pulses and the length of the single pulse movement; according to the particle The motion speed and rest mass determine the kinetic energy of the particles in the acceleration cavity as particle energy; wherein the single pulse motion length is the motion length of the particles in one pulse period.
  • An embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored.
  • a program is executed by a processor, a method for determining the energy of an accelerator-extracted particle as provided in the embodiment of the first aspect is implemented.
  • FIG. 1A is a structural diagram of a particle accelerator in Embodiment 1 of the present application.
  • FIG. 1B is a schematic diagram of a pulse signal in Embodiment 1 of the present application.
  • Embodiment 2 is a flowchart of a method for determining the energy of particles extracted by an accelerator in Embodiment 2 of the present application;
  • Embodiment 3 is a flowchart of a method for determining the energy of particles extracted by an accelerator in Embodiment 3 of the present application;
  • Embodiment 4 is a structural diagram of a device for determining particle energy extracted by an accelerator in Embodiment 4 of the present application.
  • FIG. 1A is a structural diagram of a particle accelerator in Embodiment 1 of the present application.
  • the particle accelerator shown in FIG. 1A includes an injector 110, a beam chopper 120, and an accelerator synchronization ring 130.
  • the injector 110 is connected to one end of the beam chopper 120, and the other end of the beam chopper 120 is connected to The accelerator synchronization ring 130 is connected;
  • the particle accelerator further includes a fast current transformer (Fast Current Transformer, FCT) 140, an analog-to-digital converter (Analog to Digital Converter, ADC) 150, a pulse counter 160, and a controller 170.
  • FCT Fast Current Transformer
  • ADC analog-to-digital converter
  • the fast current transformer 140 is installed on the accelerator synchronization ring 130, and is configured to generate a pulse signal when particles pass, and send the pulse signal to the analog-to-digital converter 150.
  • the analog-to-digital converter 150 is connected between the fast current transformer 140 and the pulse counter 160, and is configured to sample the pulse signal according to a set frequency to obtain a sampled pulse signal, and The sampling pulse signal is sent to the pulse counter 160.
  • the pulse counter 160 is connected between the fast current transformer 140 and the controller 170, and is set to sum the pulse periods of the M pulses when the number of pulses of the sampling pulse signal reaches the reference pulse number M As a reference duration, the reference pulse number and the reference duration are sent to the controller 170.
  • the controller 170 is connected to the pulse counter 160, and is configured to determine the movement speed of particles in the acceleration cavity according to the reference duration, the reference pulse number and the single pulse movement length; according to the movement speed of the particles And the rest mass, determining the kinetic energy of the particles in the acceleration cavity as particle energy; wherein, the single pulse motion length is the motion length of the particles in one pulse period.
  • the injector 110 is configured to ionize the gaseous particles of the element to be injected into ions, and inject the particle beam formed by the ions into the accelerator synchronization ring 130, wherein the injector 110 determines the particles to be injected The type of beam and beam intensity etc.
  • the beam chopper 120 is configured to define the beam length of the particle beam injected by the injector 110 into the accelerator synchronization ring 130; the accelerator synchronization ring 130 is configured to accelerate the injected particles synchronously.
  • the particles may be protons or heavy ions.
  • the accelerator synchronization ring 130 is a hollow shell structure, wherein the hollow portion forms an acceleration cavity.
  • the FCT 140 is mounted on the casing structure of the accelerator sync ring 130.
  • the particles are accelerated synchronously in the acceleration cavity, and when particles pass through the FCT 140, the FCT 140 will generate a corresponding pulse signal and send the generated pulse signal to the ADC 150.
  • FIG. 1B schematically shows a pulse signal diagram, in which one pulse period corresponds to the length of time a particle moves in the acceleration cavity for one week.
  • the ADC 150 when the ADC 150 receives the pulse signal, it will sample the pulse signal according to the set sampling frequency to obtain a sampled pulse signal, and send the sampled pulse to the pulse counter 160.
  • the set sampling frequency is set by the particle accelerator operator or designer according to the needs or empirical values. In an embodiment, the set sampling frequency may be 100 MHz.
  • the pulse counter 160 after receiving the sampling pulse signal, the pulse counter 160 counts the sampling pulse signal, and when the number of pulses reaches the reference pulse number, sums the pulse periods of the multiple pulses in the reference pulse number to obtain the reference duration .
  • the reference pulse number is the number of pulses with a complete pulse period.
  • FIG. 1B schematically shows the case where the pulse counting method is pulse rising edge counting. Among them, the reference pulse number is M, the detected pulse rising edge is (M+1), the corresponding reference duration is (T 2 -T 1 ), corresponding to the sum of M pulse periods, or (M+1) The sum of the pulse periods.
  • the pulse counter 160 sends the reference pulse number and the reference duration to the controller 170.
  • the pulse counter may be a field programmable gate array (Field Programmable Gate Array, FPGA).
  • the preset reference time is a preset time range of pulse counting, which is set by the particle accelerator operator or designer according to accuracy requirements or empirical values.
  • the number of reference pulses may be 500.
  • the controller 170 determines the movement speed of the particles in the acceleration cavity according to the preset reference time, reference pulse number and single pulse movement length; and determines the particles in the acceleration cavity according to the movement speed and static mass of the particles
  • the kinetic energy is used as particle energy.
  • the preset reference time and the length of the single pulse movement are preset and stored in the storage device of the controller.
  • the single pulse motion length is the motion length of particles in one pulse period. In one embodiment, the single pulse motion length is the circumference of the acceleration cavity in the accelerator synchronization ring 130.
  • the pulse signal generated when particles pass through the FCT is sampled by the ADC to form a sampling pulse signal, and the pulse count of the pulse signal sampled by the pulse counter reaches the reference pulse number to obtain the corresponding reference duration, and Send the reference pulse number and reference duration to the controller; the controller determines the particle's movement speed in the acceleration cavity through the reference pulse number, reference duration and single pulse motion length, and combines the particle's rest mass to determine the particle in the acceleration cavity
  • the kinetic energy is used as particle energy.
  • the particle accelerator further includes: a detection probe 180 and a synchronization ring controller 190.
  • the controller 170 is connected to the fast current transformer 140, and the synchronization ring controller 190 is connected between the controller 170 and the accelerator synchronization ring 130.
  • the detection probe 180 is installed on the accelerator synchronization ring 130, and is configured to detect the voltage phase of the accelerator synchronization ring 130 as the accelerator phase, and send the accelerator phase to the controller 170.
  • the fast current transformer 140 is further configured to acquire the beam phase of the particles when particles pass through, and send the beam phase to the controller 170.
  • the controller 170 is configured to compare the particle energy with a preset particle energy and generate a first according to the beam phase and the accelerator phase when the particle energy is less than the preset particle energy A phase adjustment signal is sent to the accelerator controller 190; when the particle energy is greater than the preset particle energy, a second phase adjustment signal is generated according to the beam phase and the accelerator phase and sent to the accelerator controller 190.
  • the accelerator controller 190 is configured to adjust the accelerator phase when receiving the first phase adjustment signal so that the phase difference between the beam phase and the accelerator phase is the acceleration phase threshold; when receiving the second phase When adjusting the signal, adjust the accelerator phase so that the phase difference between the beam phase and the accelerator phase is the deceleration phase threshold.
  • the deceleration phase threshold is different from the acceleration phase threshold by 180°.
  • the detection probe 180 detects the voltage phase of the accelerator synchronization ring 130 in real time or timing, and sends the detected voltage phase to the controller 170 as the accelerator phase.
  • the FCT 140 also detects the beam phase of the particle, and sends the detected beam phase to the controller 170. After determining the energy of the particles accelerated synchronously in the acceleration cavity in the controller 170, the determined particle energy is compared with the preset particle energy determined according to the needs of the patient's lesion.
  • the controller 170 will generate the first phase adjustment signal and send it to the synchronization loop controller 190 accordingly.
  • the synchronization loop controller 190 adjusts the accelerator phase according to the first phase adjustment signal so that the phase difference between the beam phase and the accelerator phase is the acceleration phase threshold.
  • the acceleration phase threshold is set by the designer of the particle accelerator according to the test results.
  • the controller 170 will correspondingly generate a second phase adjustment signal and send it to the synchronization loop controller 190.
  • the synchronization loop 190 adjusts the accelerator phase according to the second phase adjustment signal so that the phase difference between the beam phase and the accelerator phase is the deceleration phase threshold.
  • the deceleration phase threshold is different from the acceleration phase threshold by 180°.
  • the controller 170 When the particle energy is equal to the preset particle energy, it indicates that the energy of the particles in the accelerator synchronization ring 130 is just the energy value required for the patient's radiotherapy, so the controller 170 will not generate a phase that causes the synchronization ring controller 190 to adjust the accelerator phase Adjust the signal.
  • the voltage phase of the accelerator synchronization loop is detected as an accelerator phase by setting a detection probe and sent to the controller; the beam phase at the time of particle acceleration obtained by FCT is sent to the controller; the determined particle energy and the preset The particle energies are compared to generate a first phase adjustment signal or a second phase adjustment signal that causes the synchronization loop controller to adjust the accelerator phase; the synchronization ring controller adjusts the accelerator synchronization loop according to the received first phase adjustment signal or the second phase adjustment signal In the voltage phase, the difference between the beam phase and the accelerator phase is the acceleration phase threshold or deceleration phase threshold.
  • the above technical solution is used to adjust the phase of the accelerator when the particle energy is not consistent with the preset particle energy, so as to achieve effective control of the energy of the synchronously accelerated particles in the accelerator synchronization loop.
  • Embodiment 2 is a flowchart of a method for determining the energy of particles extracted by an accelerator in Embodiment 2 of the present application.
  • the embodiment of the present application is applicable to the case of determining the particle energy when the particles injected into the synchrotron of the accelerator are accelerated by the synchrotron.
  • the method is applicable to a device for determining the particle energy extracted by the accelerator. It is realized and specifically configured in the controller of the particle accelerator provided by the technical solutions of the foregoing multiple embodiments.
  • the method for determining the energy of the particles extracted from the accelerator as shown in FIG. 2 includes step S210, step S220, and step S210.
  • step S210 a reference duration corresponding to the number of pulses of the sampling pulse signal received in the pulse counter reaching the reference pulse number M is acquired.
  • the reference duration is obtained by summing the pulse periods of M pulses.
  • the pulse counter When the pulse counter receives the sampling pulse signal, it will count the pulses in the sampling pulse signal according to the set pulse counting method. When the number of pulses reaches the reference pulse number M, the sum of the pulse periods of the M pulses is calculated to obtain the reference duration.
  • the pulse counter sends the reference duration and reference pulse number to the controller.
  • the reference pulse number can also be stored in the controller in advance, and the pulse counter only sends the reference duration to the controller. At this time, the reference pulse number pre-stored in the controller is consistent with the reference pulse number in the pulse counter.
  • the pulse counter may be an FPGA. In an embodiment, the number of reference pulses may be 500.
  • the reference pulse number is the number of pulses with a complete pulse period. In one embodiment, when rising edge counting is used, when the number of reference pulses is M, the detected pulse rising edges are (M+1).
  • step S220 the movement speed of the particles in the acceleration cavity is determined according to the reference duration, the number of reference pulses, and the movement length of the single pulse.
  • the single pulse motion length is the motion length of the particle in one pulse period.
  • the total length of the particles in the accelerator within the reference duration is determined; according to the ratio between the total length of the movement and the reference duration, the velocity of the particles in the acceleration cavity is determined.
  • the velocity of particles in the acceleration cavity is determined according to the following formula:
  • v is the movement speed of the particles
  • l 0 is the length of the single pulse movement
  • n is the number of reference pulses
  • t is the reference duration
  • the corresponding reference duration is 50.01 ⁇ s
  • step S230 the kinetic energy of the particles in the acceleration cavity is determined as the particle energy according to the movement speed and the rest mass of the particles.
  • the moving mass of the particles determines the moving mass of the particles; according to the moving mass and the rest mass, determine the kinetic energy of the particles in the acceleration cavity as the particle energy.
  • v is the speed of motion
  • m 0 is the rest mass
  • c is the speed of light
  • E is the particle energy
  • the rest mass of the proton is 938 MeV/c 2 and the velocity of the proton is 1.7996 ⁇ 10 8 m/s
  • the reference pulse length corresponding to the reference pulse number is obtained by acquiring the pulse number of the sampling pulse signal received in the pulse counter; according to the reference duration, the reference pulse number and the single pulse movement length, the movement of the particles in the acceleration cavity is determined Speed; According to the moving speed and rest mass of the particles, determine the kinetic energy of the particles in the acceleration cavity as the particle energy.
  • Embodiment 3 is a flowchart of a method for determining the energy of particles extracted by an accelerator in Embodiment 3 of the present application.
  • the operation determines the moving speed of the particles in the acceleration cavity according to the preset reference time, the reference pulse number and the single pulse motion length
  • it also includes “determine the reference duration according to the sampling frequency of the sampling pulse signal Accuracy value; according to the reference duration accuracy value combined with the reference pulse number and single pulse motion length, determine the particle's motion speed interval; according to the motion speed interval and the particle's rest mass, determine the particle Particle energy range” to determine the energy range of particles within the allowable range of error.
  • the operation determines the kinetic energy of the particle in the acceleration cavity as particle energy according to the movement speed and the rest mass of the particle
  • the method for determining the energy of particles extracted from the accelerator as shown in FIG. 3 includes steps S310 to S370.
  • step S310 the reference duration corresponding to the number of pulses of the sampling pulse signal received in the pulse counter reaching the reference pulse number M is acquired.
  • the reference duration is obtained by summing the pulse periods of M pulses.
  • step S320 the movement speed of the particles in the acceleration cavity is determined according to the reference duration, the number of reference pulses, and the movement length of the single pulse.
  • the single pulse motion length is the motion length of the particle in one pulse period.
  • step S330 a reference duration accuracy value is determined according to the sampling frequency of the sampling pulse signal; according to the reference duration accuracy value combined with the reference pulse number and the single pulse movement length, the movement speed interval of the particle is determined.
  • the integer multiple of the reciprocal of the sampling frequency of the sampling pulse signal is used as the reference duration accuracy value; the obtained reference duration is added to the reference duration accuracy value to obtain the maximum reference duration; the obtained reference duration is subtracted from the reference duration Accuracy value to obtain the minimum reference duration; according to the minimum reference duration, reference pulse number and single pulse movement length, determine the maximum movement speed of particles; according to the maximum reference duration, reference pulse number and single pulse movement length, determine the minimum movement speed of particles; The minimum motion speed and the maximum motion speed are used as the end points of the interval to obtain a continuous motion speed interval.
  • the motion speed interval may be an open interval or a closed interval.
  • v min is the minimum motion speed
  • v max is the maximum motion speed
  • l 0 is the length of the single pulse motion
  • n is the number of reference pulses
  • t is the reference duration
  • f is the sampling frequency
  • a is allowed Error parameter, where a is a positive integer.
  • a is 1.
  • the corresponding reference duration accuracy value is 0.01 ⁇ s.
  • the velocity motion interval is (1.79928 ⁇ 10 8 m/s, 1.8 ⁇ 10 8 m/s), or [1.79928 ⁇ 10 8 m/s, 1.8 ⁇ 10 8 m/s].
  • step S340 the particle energy interval of the particle is determined according to the motion speed interval and the static mass of the particle.
  • the minimum moving mass of the particle is determined according to the minimum moving speed in the moving speed interval and the static mass of the particle; the kinetic energy of the particle in the acceleration cavity is determined as the minimum particle energy according to the minimum moving mass and the static mass.
  • the maximum motion mass of the particles is determined according to the maximum motion speed in the motion speed interval and the rest mass of the particles; the kinetic energy of the particles in the acceleration cavity is determined as the maximum particle energy according to the maximum motion mass and the rest mass.
  • the particle energy interval may be an open interval (E min , E max ) or a closed interval [E min , E max ].
  • the maximum The moving speed is 1.8 ⁇ 10 8 m/s
  • the minimum moving speed is 1.79928 ⁇ 10 8 m/s
  • the corresponding particle has a maximum particle energy of 234.5Mev, a minimum particle energy of 234.24Mev
  • step S350 the kinetic energy of the particles in the acceleration cavity is determined as the particle energy according to the movement speed and the rest mass of the particles.
  • step S360 the particle energy is compared with a preset particle energy.
  • the preset particle energy is correspondingly calculated according to the lesions of different patients, and corresponds to the theoretical value of the particle energy required by the patient during radiotherapy.
  • step S370 the accelerator phase is adjusted according to the comparison result and the beam phase of the particle movement in the acceleration cavity; wherein the accelerator phase is the voltage phase of the accelerator synchronization loop.
  • a first phase adjustment signal is generated so that the phase difference between the beam phase and the accelerator phase is the acceleration phase threshold;
  • a second phase adjustment signal is generated so that the phase difference between the beam phase and the accelerator phase is the deceleration phase threshold; wherein, the deceleration phase threshold and the The acceleration phase threshold differs by 180°.
  • the controller sends the first phase adjustment signal to the synchronization loop controller.
  • the synchronization loop controller adjusts the accelerator phase correspondingly so that the phase difference between the beam phase and the accelerator phase is the acceleration phase Difference;
  • the controller sends the second phase adjustment signal to the synchronization loop controller.
  • the synchronization loop controller adjusts the accelerator phase accordingly, so that the phase difference between the beam phase and the accelerator phase is deceleration Phase difference value.
  • the acceleration phase threshold is set by the designer of the particle accelerator according to the test results.
  • a step of determining the particle energy interval is added, so that the reference duration accuracy value is determined according to the sampling frequency of the sampling pulse signal; and the reference pulse number and the single pulse movement length are combined according to the reference duration accuracy value, Determine the moving speed interval of the particle; according to the moving speed interval and the rest mass of the particle, determine the particle energy interval of the particle. So that within the allowable range of error, determine the interval of particle energy.
  • the operation of comparing the particle energy with the preset particle energy is added, and the voltage phase of the accelerator synchronization loop is adjusted according to the comparison result, thereby achieving energy adjustment of the particles being accelerated in the acceleration cavity.
  • Embodiment 4 is a structural diagram of a device for determining particle energy extracted by an accelerator in Embodiment 4 of the present application.
  • the embodiments of the present application are suitable for determining the particle energy when the particles injected into the synchronization ring of the accelerator are accelerated by the synchronization ring.
  • the device is implemented by at least one of software and hardware, and is configured in the technical solutions of the above multiple embodiments
  • the provided particle accelerator is in the controller.
  • the device for determining the particle energy drawn by the accelerator as shown in FIG. 4 includes a reference duration acquisition module 410, a motion speed determination module 420, and a particle energy determination module 430.
  • the reference duration acquisition module 410 is configured to acquire the reference duration corresponding to the reference pulse number when the number of pulses of the sampling pulse signal received in the pulse counter reaches the reference pulse number M; wherein, the reference duration is summed according to the pulse period of the M pulses get.
  • the movement speed determination module 420 is configured to determine the movement speed of the particles in the acceleration cavity according to the reference duration, the reference pulse number and the movement length of the single pulse; wherein, the movement length of the single pulse is that the particles are in one pulse The length of movement in a cycle.
  • the particle energy determination module 430 is configured to determine the kinetic energy of the particle in the acceleration cavity as the particle energy according to the movement speed and the rest mass of the particle.
  • the reference duration acquisition module is used to acquire the reference duration corresponding to the reference pulse number when the number of pulses of the sampling pulse signal received in the pulse counter reaches the reference pulse number;
  • the particle energy determination module determines the kinetic energy of the particles in the acceleration cavity as the particle energy according to the particle's motion speed and rest mass.
  • the motion speed determination module 420 includes: a motion speed determination unit.
  • the movement speed determination unit is set to determine the movement speed of the particles in the acceleration cavity according to the following formula:
  • v is the movement speed of the particles
  • l 0 is the length of the single pulse movement
  • n is the number of reference pulses
  • t is the reference duration
  • the device further includes a particle energy interval determination module, including: a motion speed interval determination unit and a particle energy interval determination unit.
  • the movement speed interval determination unit is set to determine the movement speed of the particles in the acceleration cavity according to the reference duration, the number of reference pulses and the movement length of the single pulse, and then determine according to the sampling frequency of the sampling pulse signal Reference duration accuracy value; according to the reference duration accuracy value and the reference pulse number to memorize the length of a single pulse movement, determine the movement speed interval of the particle;
  • the particle energy interval determining unit is configured to determine the particle energy interval of the particle based on the motion speed interval and the static mass of the particle.
  • the particle energy determination module 430 includes a motion quality determination unit and a particle energy determination unit.
  • the motion quality determination unit is configured to determine the motion quality of the particles based on the motion speed and the rest mass of the particles.
  • the particle energy determination unit is configured to determine the kinetic energy of the particles in the acceleration cavity as the particle energy according to the moving mass and the rest mass.
  • the device further includes an accelerator phase adjustment module, including: an energy comparison unit and a phase adjustment unit.
  • the energy comparison unit is configured to compare the particle energy with the preset particle energy after determining that the kinetic energy of the particle in the acceleration cavity is used as the particle energy according to the movement speed and the rest mass of the particle.
  • the phase adjustment unit is configured to adjust the accelerator phase according to the comparison result and the beam phase of the particle motion in the acceleration cavity; wherein the accelerator phase is the voltage phase of the accelerator synchronization loop.
  • the phase adjustment unit is configured to: if the particle energy is less than the preset particle energy, generate a first phase adjustment signal to make the phase of the beam phase and the accelerator phase The difference is the acceleration phase threshold; if the particle energy is greater than the preset particle energy, a second phase adjustment signal is generated so that the phase difference between the beam phase and the accelerator phase is the deceleration phase threshold; wherein The difference between the deceleration phase threshold and the acceleration phase threshold is 180°.
  • the above-mentioned accelerator-derived particle energy determination product can execute the accelerator-derived particle energy determination method provided in any embodiment of the present application, and has corresponding functional modules and beneficial effects for executing the accelerator-derived particle energy determination method.

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Abstract

L'invention concerne un accélérateur de particules, un procédé et un appareil permettant de déterminer l'énergie des particules sortant de ce dernier, ainsi qu'un support. Selon l'accélérateur de particules de l'invention, un CAN (150) échantillonne un signal d'impulsion généré par un FCT (140) lorsque des particules passent afin de former un signal d'impulsion échantillonné ; un compteur d'impulsions (160) obtient une durée de référence correspondante lorsque le nombre d'impulsions du signal d'impulsion échantillonné atteint un nombre de référence d'impulsions, et envoie le nombre de référence d'impulsions et la durée de référence à un dispositif de commande (170) ; le dispositif de commande (170) détermine la vitesse de mouvement de particules dans une cavité d'accélération en fonction du nombre de référence d'impulsions, de la durée de référence et d'une longueur de mouvement d'impulsion unique, et détermine, en combinaison avec la masse statique des particules, l'énergie cinétique des particules dans la cavité d'accélération en tant qu'énergie de particules.
PCT/CN2018/117407 2018-11-26 2018-11-26 Accélérateur de particules, procédé et appareil de détermination de l'énergie de particules sortant de ce dernier et support WO2020107146A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201880002494.3A CN109661860A (zh) 2018-11-26 2018-11-26 粒子加速器及其引出粒子能量的确定方法、装置和介质
PCT/CN2018/117407 WO2020107146A1 (fr) 2018-11-26 2018-11-26 Accélérateur de particules, procédé et appareil de détermination de l'énergie de particules sortant de ce dernier et support
CN201911102646.XA CN110708856B (zh) 2018-11-26 2019-11-12 粒子加速器及其引出粒子能量的确定方法、装置和介质

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/117407 WO2020107146A1 (fr) 2018-11-26 2018-11-26 Accélérateur de particules, procédé et appareil de détermination de l'énergie de particules sortant de ce dernier et support

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