Electron cyclotron resonance ion source beam supply control system for particle accelerator therapy device

Abstract

The present disclosure provides an electron cyclotron resonance ion source beam supply control system for a particle accelerator treatment device, comprising: a client, configured to configure event trigger parameters and start / stop output control signals of event trigger light signals, monitor the output state of the event trigger light signals, configure event analysis parameters, and set the beam chopping pulse signal width and the electron cyclotron resonance ion source pulse signal width; a synchronization timing server, configured to output the event trigger light signals according to the event trigger parameters; a time synchronization server, configured to provide a unified time reference; a synchronization timing module, configured in a beam chopping or pulse beam control mode, configured to control the synchronization of the pulse beam control signal and the beam chopping control signal based on the unified time reference by comparing the event trigger light signal with the event analysis parameters, thereby generating a pulse beam or a DC beam and performing beam chopping; and a beam chopping and pulse beam monitoring server, configured to monitor the working state of the synchronization timing module and collect key action signals.

Description

Technical Field

[0001] The present disclosure relates to the field of particle accelerator control technology, specifically to the field of electron cyclotron resonance ion source control technology, and more particularly to an electron cyclotron resonance ion source beam supply control system for a particle accelerator treatment device. Background Art

[0002] Particle accelerator therapy devices generate heavy ion beams for tumor treatment, an advanced radiotherapy technology that has been widely used in cancer radiotherapy for many years. High-charge electron cyclotron resonance (ECR) ion sources, a key component of particle therapy devices, are used to provide a stable and reliable carbon ion beam. After acceleration in a cyclotron and synchrotron, the beam is directed to the patient's lesion site, utilizing the Bragg Peak effect of the carbon ion beam to treat the patient's tumor. Afterglow mode is a unique operating state of the ECR ion source. Compared to DC mode, afterglow pulsed mode significantly increases the peak current intensity of the high-charge ion beam, extracting and injecting a pulsed beam into the cyclotron. This is an important means of increasing the number of particles extracted at the treatment terminal and improving patient treatment efficiency.

[0003] In particle accelerator therapy devices, the beam generated and extracted by the ECR ion source must be deflected by a pulsed high voltage applied to the beam chopping system of a low-energy transmission line before being injected into the cyclotron. A portion of the extracted beam is then focused by a buncher and injected into the cyclotron for primary acceleration and extraction. After passing through a medium-energy transmission line, it is injected into a synchrotron for secondary acceleration under the action of an injection bump magnet. The synchrotron accelerates the beam to the energy required by the patient and then transmits it via a high-energy transmission line to the treatment terminal for patient treatment. The generation, chopping, injection, acceleration, and extraction of a particle accelerator beam requires the coordination of numerous accelerator devices within a strict set of timing constraints. In the ECR ion source's DC operating mode, since the ion source continuously provides a stable DC beam, the beam chopping monitoring system can achieve chopping and cyclotron injection of the extracted beam at any time. In the pulsed operation mode of the ECR ion source, the beam chopping system needs to be strictly matched with the high-intensity pulsed beam output to ensure the pulsed beam injection into the cyclotron. Compared with the DC operation mode, the pulsed operation mode has special requirements for the synchronization between the ion source system, beam chopping system, synchrotron beam injection, acceleration and extraction. A set of synchronous timing mechanisms is needed to constrain the start and stop actions of each system and related equipment. Summary of the Invention

[0004] In response to the above technical problems, the present disclosure provides an electron cyclotron resonance ion source beam supply control system for a particle accelerator treatment device, which is used to achieve strict matching between the beam chopping system and the high-intensity pulse beam output.

[0005] Based on this, the present disclosure provides an electron cyclotron resonance ion source beam supply control system for a particle accelerator treatment device, comprising: a synchronous timing client for configuring event trigger parameters and a start / stop output control signal of an event trigger light signal, and monitoring the output state of the event trigger light signal; a beam chopping and pulse beam monitoring client for configuring event analysis parameters, setting the beam chopping pulse signal width and the electron cyclotron resonance ion source pulse signal width; a synchronous timing server for outputting an event trigger light signal according to the event trigger parameters; a time synchronization server for providing a unified time reference; a synchronous timing module configured as a beam chopping module; a time synchronization server for providing a unified time reference ... The wave control mode and / or pulse beam control mode are used to output the pulse beam control signal to the electron cyclotron resonance ion source to generate a pulse beam or a DC beam by comparing the event trigger light signal with the event analysis parameters to synchronize the pulse beam control signal and the beam chopping control signal based on a unified time base, and output the beam chopping control signal to the pulse generator to generate a pulse high voltage signal to perform beam chopping on the pulse beam or the DC beam; the beam chopping and pulse beam monitoring server is used to monitor the working status of the synchronous timing module in real time, and to collect the pulse beam control signal, the beam chopping control signal and the pulse high voltage signal.

[0006] According to an embodiment of the present disclosure, the event triggering optical signal includes a beam chopping event triggering optical signal and a pulse beam event triggering optical signal, and the event analysis parameters include a beam chopping event analysis parameter and a pulse beam event analysis parameter.

[0007] According to an embodiment of the present disclosure, when the synchronization timing module is configured in a beam chopping control mode, the synchronization timing module compares the beam chopping event trigger light signal with the beam chopping event analysis parameters, and outputs a single pulse signal as a gate control signal to control the pulse generator to generate a pulsed high-voltage signal; when the synchronization timing module is configured in a pulse beam control mode, the synchronization timing module compares the pulse beam event trigger light signal with the pulse beam event analysis parameters, and outputs a continuous pulse signal or a DC signal to the electron cyclotron resonance ion source to enable the electron cyclotron resonance ion source to generate a pulse beam or a DC beam, respectively; when the synchronization timing module is configured in a beam chopping control mode and a pulse beam control mode, the synchronization timing module timestamps the switching action time between the DC operation mode and the pulse operation mode of the electron cyclotron resonance ion source, the beam chopping occurrence time, the input / output signal jump time, the equipment failure time and the external interlocking time.

[0008] According to an embodiment of the present disclosure, the synchronization timing server controls the synchronization of the pulse beam control signal and the beam chopping control signal based on the case analysis control information protocol. The case analysis control information protocol includes: a start character, which is used to mark the beginning of the timing control information; an end character, which is used to mark the end of the timing control information; the number of cases, which is used to indicate the number of case codes contained in the marking control information; the case content, which is composed of case analysis parameters and corresponding delay parameters. The case analysis parameters are used to indicate the type of action to be performed, and the delay parameters are used to indicate that after receiving the case trigger light signal that matches the case analysis parameters, the synchronization timing module starts to perform the action. The trigger pulse width is used to indicate the high-level duration of a single pulse signal output by the synchronization timing module of the pulse beam control mode after the event trigger light signal is successfully compared with the event analysis parameters; the single pulse width is used to indicate the high-level duration of the single-shot signal output by the synchronization timing module of the beam chopping control mode; the continuous pulse low-level width is used to indicate the low-level duration of the continuous pulse signal output by the synchronization timing module of the pulse beam control mode; the continuous pulse high-level width is used to indicate the high-level duration of the continuous pulse signal output by the synchronization timing module of the pulse beam control mode; the reserved area is used for function expansion.

[0009] According to an embodiment of the present disclosure, the synchronization timing client configures the event trigger parameters including: configuring the event trigger table, the event trigger table includes the electron cyclotron resonance ion source single pulse switching preparation case and the corresponding first delay parameter, the electron cyclotron resonance ion source continuous pulse switching preparation case and the corresponding second delay parameter, the electron cyclotron resonance ion source pulse beam start output case and the corresponding third delay parameter, the beam chopping single pulse preparation case and the corresponding fourth delay parameter, the beam chopping start output case and the corresponding fifth delay parameter.

[0010] According to an embodiment of the present disclosure, the synchronization timing module of the pulse beam control mode executes a single pulse switching preparation instruction once at the beginning of each operating cycle of the particle accelerator treatment device, forcing the pulse beam control signal to be at a high level, and adjusting the delay parameter in the synchronization timing information based on the high level as the synchronization reference, so as to align the falling edge of the pulse beam control signal with the low level of the beam chopping control signal.

[0011] According to an embodiment of the present disclosure, when the event trigger light signal received by the synchronization timing module of the pulse beam control mode includes an electron cyclotron resonance ion source single pulse switching preparation event, after waiting for the delay time matched by the first delay parameter, the pulse beam control signal is forced to be at a high level, and the high level is used as the synchronization reference to wait for continuous pulse switching; when the event trigger light signal received by the synchronization timing module of the pulse beam control mode includes an electron cyclotron resonance ion source continuous pulse switching preparation event, the pulse beam control signal is controlled to maintain a continuous high level output; when the event trigger light signal received by the synchronization timing module of the pulse beam control mode includes an electron cyclotron resonance ion source pulse beam start output event, after waiting for the delay time matched by the third delay parameter, the pulse signal of the high and low level width time in the synchronization timing module of the pulse beam control mode is started to be continuously output.

[0012] According to an embodiment of the present disclosure, when the event trigger light signal received by the synchronization timing module of the beam chopping control mode includes a beam chopping single pulse preparation event, the beam chopping control signal is forced to be set to a high level after waiting for a delay time that matches the fourth delay parameter; when the event trigger light signal received by the synchronization timing module of the beam chopping control mode includes a beam chopping start output event, the pulse signal of the single pulse width time in the synchronization timing information of the beam chopping control mode is started to be output after waiting for a delay time that matches the fifth delay parameter.

[0013] According to an embodiment of the present disclosure, when the set startup event parameter is any other event parameter that does not exist in the event trigger table, the synchronization timing module of the pulse beam control mode no longer responds to the electron cyclotron resonance ion source pulse beam startup output event, and maintains a high-level DC output, and the electron cyclotron resonance ion source switches to the DC operation mode; when the set startup event parameter is the electron cyclotron resonance ion source pulse beam startup output event, the synchronization timing module of the pulse beam control mode responds to the electron cyclotron resonance ion source pulse beam startup output event, and the electron cyclotron resonance ion source switches to the pulse operation mode.

[0014] According to an embodiment of the present disclosure, when the synchronization timing server receives the instruction to end beam extraction, it stops the output of the current event light signal, generates an electron cyclotron resonance ion source continuous pulse operation event and starts the event output. The synchronization timing module of the pulse beam control mode outputs a continuous pulse signal with a preset duty cycle according to the continuous pulse operation event of the electron cyclotron resonance ion source, and maintains the electron cyclotron resonance ion source operating in a stable pulse operation mode.

[0015] The electron cyclotron resonance ion source beam supply control system of the particle accelerator treatment device provided in the embodiment of the present disclosure has at least the following beneficial effects:

[0016] By configuring the internal logic function of the synchronous timing module to be compatible with the beam chopping control and ion source operation mode control functions, and then based on the event timing mechanism, the falling edge of the pulse beam control signal is aligned with the low level of the beam chopping control signal through the synchronous timing module device comparing the event trigger light signal with the event analysis parameters, thus achieving strict synchronous timing control of the pulse beam control signal and the beam chopping control signal, ensuring the reliable generation, chopping, injection, acceleration and extraction of the pulse beam.

[0017] Furthermore, since the designed case-analysis control information protocol conforms to the specific characteristics of the control signal and the synchronization control with the beam chopping system in the pulse operation mode of the ion source, the synchronization timing server can more accurately control the synchronization of the pulse beam control signal and the beam chopping control signal based on the case-analysis control information protocol.

[0018] Furthermore, by editing the event trigger table and outputting the event trigger light signal, a control mechanism for switching between the DC operation and pulse operation modes of the ECR ion source is realized, thereby improving the usability of the medical device.

[0019] Furthermore, when the instruction to end beam extraction is received, a continuous pulse operation instance of the ECR ion source is automatically generated and the output is started, so as to maintain the ion source working in a stable pulse operation mode and improve the efficiency of pulse beam generation.

[0020] The synchronization timing module also includes time acquisition and timestamp functionality, enabling it to timestamp and publish key signals such as the moment the ECR source switches between operating modes, when beam chopping occurs, input / output signal transitions, equipment failures, and external interlocks. Furthermore, the beam chopping and pulse beam monitoring servers collect and monitor the given signals output by the synchronization timing module in real time, facilitating fault location and synchronization analysis during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0022] Figure 1 The relationship between the control signal and beam current of the pulsed operation mode of the ion source provided by the embodiment of the present disclosure is schematically shown.

[0023] Figure 2 The schematic diagram shows the architecture of the electron cyclotron resonance ion source beam supply control system of the particle accelerator treatment device provided by the embodiment of the present disclosure.

[0024] Figure 3 The field diagram of the instance parsing control information protocol provided by the embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the present disclosure more clearly understood, the present disclosure is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It is apparent that the embodiments described are only a portion of the embodiments of the present disclosure, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present disclosure without inventive effort are intended to fall within the scope of protection of the present disclosure.

[0026] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise," "include," etc. used herein indicate the presence of the features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0027] In this disclosure, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on specific circumstances.

[0028] In the description of the present disclosure, it should be understood that the terms "longitudinal", "length", "circumferential", "front", "rear", "left", "right", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the subsystem or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0029] Throughout the drawings, identical elements are denoted by identical or similar reference numerals. Conventional structures or configurations are omitted where they may obscure the understanding of this disclosure. The shapes, sizes, and positional relationships of components in the drawings do not reflect actual size, proportion, or positional relationships. In addition, in the claims, any reference signs placed between parentheses should not be construed as limitations of the claims.

[0030] Similarly, in order to streamline the present disclosure and aid in understanding one or more of the various disclosed aspects, in the above description of exemplary embodiments of the present disclosure, the various features of the present disclosure are sometimes grouped together into a single embodiment, figure, or description thereof. Descriptions with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" and the like mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in an appropriate manner.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the present disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0032] Based on event-timing technology and synchronous timing module equipment, this invention constructs a pulsed beam control system architecture, providing stable continuous pulse or DC control signals for the ECR ion source and single-pulse control signals for the beam chopping system. This enables synchronized timing control of ECR ​​ion source pulsed beam generation, beam chopping, synchrotron beam injection, and treatment terminal beam extraction, ensuring reliable generation, chopping, injection, acceleration, and extraction of the pulsed beam. A detailed description is provided below with reference to the accompanying figures.

[0033] Figure 1 The relationship between the control signal and beam current of the pulsed operation mode of the ion source provided by the embodiment of the present disclosure is schematically shown.

[0034] like Figure 1As shown, the control signal for the ion source pulse mode is a continuous pulse signal with a certain duty cycle (high level duration is T1, low level duration is T2). When the signal source of the ECR ion source captures the falling edge of this control signal, the signal source power output drops to zero, and the ion source outputs a high-current pulse beam. This is the afterglow operating characteristic of the ECR ion source. In a particle accelerator treatment device, the ECR ion source periodically outputs a pulse beam under the control of a continuous pulse input signal. During patient treatment, the beam chopping system operates in single-pulse mode. The pulse generator receives a low-level control signal (duration is T3) with a certain pulse width and a cycle time equal to the accelerator operation period (T4). During the low-level duration, the ion source pulse beam is injected into the cyclotron for primary acceleration. In order to inject the high-current pulse beam generated by the ion source into the cyclotron, it is necessary to control the synchronization between the ion source pulse mode control signal and the beam chopping control signal to ensure that the beam chopping low-level signal fully matches the falling edge of the ion source pulse mode control signal.

[0035] Figure 2 The schematic diagram shows the architecture of the electron cyclotron resonance ion source beam supply control system of the particle accelerator treatment device provided by the embodiment of the present disclosure.

[0036] like Figure 2 As shown, the ion source beam supply control system may include: a synchronous timing client, a beam chopping and pulse beam monitoring client, a synchronous timing server, a synchronous timing module, a synchronous timing module, a pulse generator, an ion source and a high-voltage power supply.

[0037] Synchronous timing client The synchronous timing client is connected to the synchronous timing server to configure the event trigger parameters and the start and stop output control signals of the event trigger optical signal, and monitor the output status of the event trigger optical signal.

[0038] The beam chopping and pulse beam monitoring client connects to the beam chopping and pulse beam monitoring server to configure event analysis parameters and set the beam chopping pulse signal width and the electron cyclotron resonance ion source pulse signal width.

[0039] The synchronous timing server is used to run the synchronous timing server control program, carry the event output board module, interact with the treatment terminal client, synchronous timing client, etc. based on the data transmission protocol, receive the client beam application / end request to generate trigger events, and control the event signal output board hardware to output the event trigger light signal according to the event trigger parameters.

[0040] The time synchronization server is used to provide a unified time base. The time synchronization server is the time source for the particle accelerator treatment device. The synchronous timing module uses clock synchronization to calibrate the time with the time synchronization server to obtain a unified time base.

[0041] The synchronous timing module is configured in a beam chopping control mode and / or a pulse beam control mode, and is used to output a pulse beam control signal to an electron cyclotron resonance ion source to generate a pulse beam or a DC beam, and output a beam chopping control signal to a pulse generator to generate a pulse high-voltage signal to perform beam chopping on the pulse beam or the DC beam, based on a unified time reference and by comparing the event trigger light signal with the event analysis parameter to control the synchronization of the pulse beam control signal and the beam chopping control signal.

[0042] The beam chopping and pulse beam monitoring server is used to run the beam chopping and pulse beam monitoring server control program, monitor the working status of the synchronization timing module in real time, and collect beam chopping, pulse beam control signals, beam chopping control signals and pulse high-voltage signals in real time.

[0043] In the embodiment of the present disclosure, the event triggering optical signal includes a beam chopping event triggering optical signal and a pulse beam event triggering optical signal, and the event analysis parameters include a beam chopping event analysis parameter and a pulse beam event analysis parameter.

[0044] In the embodiments of the present disclosure, the internal logic functions of the synchronization timing module are configured to be beam chopping control mode and / or pulse beam control mode according to different application scenarios, so as to realize synchronization timing modules with different functions, as follows:

[0045] When the synchronous timing module is configured in the beam chopping control mode, the synchronous timing module compares the beam chopping event trigger light signal with the beam chopping event analysis parameter, and outputs a single pulse signal as a gate control signal to control the pulse generator to generate a pulse high voltage signal.

[0046] When the synchronization timing module is configured in the pulse beam control mode, the synchronization timing module compares the pulse beam event trigger light signal with the pulse beam event analysis parameter, and outputs a continuous pulse signal or a DC signal to the electron cyclotron resonance ion source so that the electron cyclotron resonance ion source generates a pulse beam current or a DC beam current respectively.

[0047] When the synchronization timing module is configured in beam chopping control mode and pulse beam control mode, the synchronization timing module timestamps the switching time between the direct current mode and the pulse mode of the electron cyclotron resonance ion source, the beam chopping time, the input / output signal jump time, the equipment failure time and the external interlock time.

[0048] High voltage power supply, used to provide input high voltage for the pulse generator of beam chopping.

[0049] The pulse generator is connected to an external high-voltage power supply, and the single pulse signal output by the synchronous timing module in the pulse beam control mode is used as the gate signal. When the gate signal is high, the pulse generator outputs high voltage to the plate to achieve beam deflection. When the gate signal is low, the pulse generator outputs low voltage to achieve beam chopped injection.

[0050] The ECR ion source continuously provides the pulsed beam and DC beam required for treatment. The ECR ion source of the treatment device adopts a dual redundant working mechanism, and each treatment device is equipped with two sets of independently working ECR ion sources.

[0051] The power amplifier signal source is used to receive the pulse signal output by the pulse beam control mode synchronization timing module, control the ion source power amplifier signal source to realize microwave power amplification, and the ion source unit outputs a pulse beam or a DC beam.

[0052] Furthermore, the synchronization timing server of the embodiment of the present disclosure controls the synchronization between the pulse beam control signal and the beam chopping control signal based on the case resolution control information protocol.

[0053] Figure 3 The field diagram of the instance parsing control information protocol provided by the embodiment of the present disclosure is schematically shown.

[0054] like Figure 3 As shown, the case analysis control information protocol includes:

[0055] Start character, used to mark the beginning of timing control information.

[0056] End character, used to mark the end of timing control information.

[0057] The number of instances is used to indicate the number of instance codes contained in the tag control information.

[0058] The event content consists of event analysis parameters and corresponding delay parameters. The event analysis parameters are used to indicate the type of action to be performed, and the delay parameters are used to indicate the delay time for the synchronous timing module to start executing the action after receiving the event trigger light signal that matches the event analysis parameters.

[0059] The trigger pulse width is used to indicate the high-level duration of a single pulse signal output by the synchronous timing module of the pulse beam control mode after the event trigger light signal is successfully compared with the event analysis parameters.

[0060] Single pulse width is used to indicate the high level duration of the single pulse signal output by the synchronous timing module of the beam chopping control mode, corresponding to Figure 1 Time T3 in .

[0061] Continuous pulse low level width is used to indicate the low level duration of the continuous pulse signal output by the synchronous timing module of the pulse beam control mode, corresponding to Figure 1 T2 in.

[0062] The high level width of the continuous pulse is used to indicate the high level duration of the continuous pulse signal output by the synchronous timing module of the pulse beam control mode, corresponding to Figure 1 T1 in.

[0063] Reserved area for function expansion.

[0064] In the disclosed embodiment, configuring event trigger parameters on a synchronous timing client may include configuring an event trigger table, wherein the event trigger table includes an electron cyclotron resonance ion source single pulse switching preparation event and the corresponding first delay parameter, an electron cyclotron resonance ion source continuous pulse switching preparation event and the corresponding second delay parameter, an electron cyclotron resonance ion source pulse beam start output event and the corresponding third delay parameter, a beam chopping single pulse preparation event and the corresponding fourth delay parameter, and a beam chopping start output event and the corresponding fifth delay parameter. The synchronous timing client uses the accelerator operation cycle as the polling time to start the synchronous timing trigger event output. The event output board sequentially outputs event code optical signals at intervals of the aforementioned delay parameters. The pulse beam synchronous timing module and the beam chopping synchronous timing module simultaneously receive the event trigger optical signals and compare them with the parsed event parameters pre-loaded into the internal storage control.

[0065] Furthermore, for the synchronization timing module of the pulse beam control mode: when the event trigger light signal received by the synchronization timing module of the pulse beam control mode includes an electron cyclotron resonance ion source single pulse switching preparation event, after waiting for the delay time matched by the first delay parameter, the pulse beam control signal is forced to be at a high level, and the high level is used as the synchronization reference to wait for continuous pulse switching; when the event trigger light signal received by the synchronization timing module of the pulse beam control mode includes an electron cyclotron resonance ion source continuous pulse switching preparation event, the pulse beam control signal is controlled to maintain a continuous high level output; when the event trigger light signal received by the synchronization timing module of the pulse beam control mode includes an electron cyclotron resonance ion source pulse beam start output event, after waiting for the delay time matched by the third delay parameter, the pulse signal of the high and low level width time in the synchronization timing module of the pulse beam control mode is started to be continuously output.

[0066] For the synchronization timing module of the beam chopping control mode: when the event trigger light signal received by the synchronization timing module of the beam chopping control mode includes a beam chopping single pulse preparation event, after waiting for the delay time matched by the fourth delay parameter, the beam chopping control signal is forced to be set to a high level; when the event trigger light signal received by the synchronization timing module of the beam chopping control mode includes a beam chopping start output event, after waiting for the delay time matched by the fifth delay parameter, the pulse signal of the single pulse width time in the synchronization timing information of the beam chopping control mode is started to be output.

[0067] Furthermore, the ion source beam supply control system control signal synchronization control method is as follows: the synchronization timing module of the pulse beam control mode and the synchronization timing module of the beam chopping control mode receive an event trigger light signal with the accelerator operation cycle as the polling time, and the synchronization timing module of the pulse beam control mode executes a single pulse switching preparation instruction at the beginning of each operation cycle of the particle accelerator treatment device, forcing the pulse beam control signal to be set to a high level, and adjusting the delay parameter in the synchronization timing information with the high level as the synchronization reference, and aligning the falling edge of the pulse beam control signal with the low level of the beam chopping control signal.

[0068] The remote switching control method of the ion source is as follows: when the set startup event parameter is any other event parameter that does not exist in the event trigger table, the synchronous timing module of the pulse beam control mode no longer responds to the electron cyclotron resonance ion source pulse beam startup output event and maintains a high-level DC output, and the electron cyclotron resonance ion source switches to the DC operation mode; when the set startup event parameter is the electron cyclotron resonance ion source pulse beam startup output event, the synchronous timing module of the pulse beam control mode responds to the electron cyclotron resonance ion source pulse beam startup output event, and the electron cyclotron resonance ion source switches to the pulse operation mode.

[0069] The method for maintaining the pulse beam state of the ion source is as follows: when the synchronization timing server receives the instruction to end beam extraction, it stops the output of the current event light signal, generates a continuous pulse operation event of the electron cyclotron resonance ion source and starts the event output; the synchronization timing module of the pulse beam control mode outputs a continuous pulse signal with a preset duty cycle according to the continuous pulse operation event of the electron cyclotron resonance ion source, and maintains the electron cyclotron resonance ion source operating in a stable pulse operation mode.

[0070] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present disclosure. It should be understood that the above are only specific embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. An electron cyclotron resonance ion source beam supply control system for a particle accelerator therapeutic device, characterized in that: include: Synchronous timing client, used to configure the event trigger parameters and the start and stop output control signals of the event trigger optical signal, and monitor the output status of the event trigger optical signal; Beam chopping and pulse beam monitoring client, used to configure event analysis parameters and set the beam chopping pulse signal width and the electron cyclotron resonance ion source pulse signal width; a synchronous timing server, configured to output an event trigger optical signal according to the event trigger parameter; Time synchronization server, used to provide a unified time reference; a synchronization timing module configured in a beam chopping control mode and / or a pulse beam control mode, for outputting a pulse beam control signal to an electron cyclotron resonance ion source to generate a pulse beam or a DC beam, and outputting a beam chopping control signal to a pulse generator to generate a pulsed high-voltage signal to perform beam chopping on the pulse beam or the DC beam, based on the unified time reference and by comparing the event trigger light signal with the event analysis parameter to control the synchronization of the pulse beam control signal and the beam chopping control signal; The beam chopping and pulse beam monitoring server is used to monitor the working status of the synchronization timing module in real time and collect the pulse beam control signal, beam chopping control signal and pulse high voltage signal.

2. The ion source beam supply control system according to claim 1, characterized in that: The event triggering optical signal includes a beam chopping event triggering optical signal and a pulse beam event triggering optical signal, and the event analysis parameters include a beam chopping event analysis parameter and a pulse beam event analysis parameter.

3. The ion source beam supply control system according to claim 2, characterized in that: When the synchronization timing module is configured in the beam chopping control mode, the synchronization timing module compares the beam chopping event triggering light signal with the beam chopping event analysis parameter, and outputs a single pulse signal as a gate control signal to control the pulse generator to generate a pulse high voltage signal; When the synchronization timing module is configured in a pulse beam control mode, the synchronization timing module compares the pulse beam event trigger light signal with the pulse beam event analysis parameter, and outputs a continuous pulse signal or a DC signal to the electron cyclotron resonance ion source so that the electron cyclotron resonance ion source generates a pulse beam current or a DC beam current, respectively; When the synchronization timing module is configured in beam chopping control mode and pulse beam control mode, the synchronization timing module timestamps the switching time between the direct current operation mode and the pulse operation mode of the electron cyclotron resonance ion source, the beam chopping time, the input / output signal jump time, the equipment failure time and the external interlock time.

4. The ion source beam supply control system according to claim 2, characterized in that: The synchronization timing server controls the synchronization of the pulse beam control signal and the beam chopping control signal based on the case analysis control information protocol, and the case analysis control information protocol includes: Start character, used to mark the beginning of timing control information; End character, used to mark the end of timing control information; The number of instances is used to indicate the number of instance codes included in the tag control information; The event content consists of event analysis parameters and corresponding delay parameters. The event analysis parameters are used to indicate the type of action to be performed, and the delay parameters are used to indicate the delay time for the synchronization timing module to start executing the action after receiving the event trigger light signal that matches the event analysis parameters. The trigger pulse width is used to indicate the high-level duration of a single pulse signal output by the synchronous timing module of the pulse beam control mode after the event trigger light signal is successfully compared with the event analysis parameters; Single pulse width, used to indicate the high level duration of the single pulse signal output by the synchronous timing module in the beam chopping control mode; The continuous pulse low-level width is used to indicate the low-level duration of the continuous pulse signal output by the synchronous timing module of the pulse beam control mode; The high-level width of the continuous pulse is used to indicate the high-level duration of the continuous pulse signal output by the synchronous timing module of the pulse beam control mode; Reserved area for function expansion.

5. The ion source beam supply control system according to claim 1, characterized in that: The synchronization timing client configuration instance trigger parameters include: An event trigger table is configured, wherein the event trigger table includes an electron cyclotron resonance ion source single pulse switching preparation event and a corresponding first delay parameter, an electron cyclotron resonance ion source continuous pulse switching preparation event and a corresponding second delay parameter, an electron cyclotron resonance ion source pulse beam start output event and a corresponding third delay parameter, a beam chopping single pulse preparation event and a corresponding fourth delay parameter, and a beam chopping start output event and a corresponding fifth delay parameter.

6. The ion source beam supply control system according to claim 5, characterized in that: The synchronization timing module of the pulse beam control mode executes a single pulse switching preparation instruction at the beginning of each operating cycle of the particle accelerator treatment device, forcibly sets the pulse beam control signal to a high level, and adjusts the delay parameter in the synchronization timing information based on the high level as the synchronization reference, so as to align the falling edge of the pulse beam control signal with the low level of the beam chopping control signal.

7. The ion source beam supply control system according to claim 5, characterized in that: When the event trigger light signal received by the synchronization timing module of the pulse beam control mode includes an electron cyclotron resonance ion source single pulse switching preparation event, after waiting for the delay time matched by the first delay parameter, the pulse beam control signal is forced to be at a high level, and the high level is used as a synchronization reference to wait for continuous pulse switching; When the event trigger light signal received by the synchronous timing module in the pulse beam control mode includes an electron cyclotron resonance ion source continuous pulse switching preparation event, the pulse beam control signal is controlled to maintain a continuous high level output; The event trigger light signal received by the synchronous timing module of the pulse beam control mode includes the electron cyclotron resonance ion source pulse beam start output event. After waiting for the delay time matched by the third delay parameter, the pulse signal of the high and low level width time in the synchronous timing module of the pulse beam control mode is continuously output.

8. The ion source beam supply control system according to claim 5, characterized in that: When the event trigger optical signal received by the synchronization timing module of the beam chopping control mode includes a beam chopping single pulse preparation event, after waiting for the delay time matched by the fourth delay parameter, the beam chopping control signal is forced to be set to a high level; When the event trigger light signal received by the synchronization timing module of the beam chopping control mode includes the beam chopping start output event, after waiting for the delay time matched by the fifth delay parameter, it starts to output the pulse signal of the single pulse width time in the synchronization timing information of the beam chopping control mode.

9. The ion source beam supply control system according to claim 5, characterized in that: When the set start event parameter is any other event parameter not present in the event trigger table, the synchronous timing module of the pulse beam control mode no longer responds to the electron cyclotron resonance ion source pulse beam start output event and maintains a high-level DC output, and the electron cyclotron resonance ion source switches to a DC operation mode; When the startup event parameter is set to the electron cyclotron resonance ion source pulse beam startup output event, the synchronous timing module of the pulse beam control mode responds to the electron cyclotron resonance ion source pulse beam startup output event, and the electron cyclotron resonance ion source switches to the pulse operation mode.

10. The ion source beam supply control system according to claim 1, characterized in that: When the synchronization timing server receives the instruction to end beam extraction, it stops the output of the current event light signal, generates an electron cyclotron resonance ion source continuous pulse operation event and starts the event output. The synchronization timing module of the pulse beam control mode outputs a continuous pulse signal with a preset duty cycle according to the continuous pulse operation event of the electron cyclotron resonance ion source, and maintains the electron cyclotron resonance ion source operating in a stable pulse operation mode.

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