A beam chopper system for a particle accelerator and methods of using the same

Abstract

This invention relates to a beam chopping system for particle accelerators and its usage method, comprising a DC high-voltage chopper, a host computer, and an eccentric electrode plate. The DC high-voltage chopper generates PWM pulse signals in a corresponding operating mode, converting an external DC voltage input into a target high-voltage pulse signal with a time structure consistent with the given PWM pulse signal and an amplitude consistent with the DC high-voltage power supply output. The host computer issues time parameters, example files, and operating mode control commands for the given PWM signal required for the DC high-voltage chopper to generate the high-voltage pulse, controls the operation of the DC high-voltage chopper, and acquires and analyzes the target high-voltage pulse signal of the DC high-voltage chopper. The eccentric electrode plate applies the target high-voltage pulse signal output by the DC high-voltage chopper, converting the incoming DC beam or pulse beam into a pulse beam that meets the physical beam supply requirements. This invention can be widely used in the field of particle accelerators.

Description

Technical Field

[0001] This invention relates to the field of particle accelerators, and in particular to a beam chopper system for particle accelerators and its method of use. Background Technology

[0002] The applications of particle accelerators have extended far beyond basic research, playing a vital role in materials science, solid-state physics, molecular biology, chemistry, and geology and archaeology, and are also widely used in medical fields such as isotope production, tumor diagnosis and treatment. In synchrotron ring accelerator devices that use cyclotrons or linear accelerators as injectors, the ion beam from the preceding accelerator is only needed during injection. To avoid significant losses of medium- and high-energy ion beams at the synchrotron ring accelerator inlet, which could damage the equipment, a beam chopper system is installed on the low-energy transmission line system. When the synchrotron ring accelerator requires a beam, the ion beam can be normally injected into the cyclotron or linear accelerator's linear high-frequency accelerating cavity via the low-energy transmission line system. When the synchrotron ring does not require a beam, the beam chopper system deflects the ion beam to the beam recovery device (DUMP) of the low-energy transmission line system.

[0003] The working principle of a beam chopper is that the physical beam tuner sets the time structure parameters (period, pulse width, delay) of the beam and the chopper's working mode (micro-pulse and macro-pulse working modes in internal trigger mode and external trigger mode) through a host computer. By adjusting the output of the beam chopper, an appropriate high-voltage pulse is applied to the eccentric electrode plate located in the vacuum chamber, which deflects the beam passing through the geometric center of the eccentric electrode plate, thereby adjusting the beam time structure.

[0004] Existing beam chopper solutions can employ either a pulsed DC high-voltage power supply or a vacuum tube amplification method. The vacuum tube amplification method requires providing various DC power supplies to the vacuum tubes (filament power, bias power, curtain voltage power, and plate voltage power) and an external PWM signal generator. This solution has a complex structure, long rise and fall times for the output high-voltage pulse, and relatively low output voltage. The pulsed DC high-voltage power supply solution requires a dedicated external PWM trigger signal input interface and an optical event trigger input interface. By connecting external PWM trigger signals and optical event trigger signals, it outputs a high-voltage pulse with a time structure that meets beam modulation requirements. This solution requires a custom-designed DC high-voltage power supply, and in the event of a failure, the pulsed DC high-voltage power supply is easily damaged, resulting in high maintenance costs. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this invention is to provide a beam chopper system for particle accelerators with short rise and fall times and a simple structure for outputting high-voltage pulses, as well as its usage method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: On the one hand, it provides a beam chopper system for a particle accelerator, including a DC high-voltage chopper, a host computer, and an eccentric electrode plate;

[0007] The DC high-voltage chopper is connected to an external DC high-voltage power supply and is used to generate PWM pulse signals in the corresponding working mode based on the time parameters, case files and working mode control commands issued by the host computer. It converts the external DC voltage input into a target high-voltage pulse signal with the same time structure and amplitude as the DC high-voltage power supply output.

[0008] The host computer is used to send the time parameters of the given PWM signal required for the DC high voltage chopper to generate high voltage pulses, the case file, and the working mode control command of the DC high voltage chopper, to control the operation of the DC high voltage chopper, and to acquire and analyze the target high voltage pulse signal of the DC high voltage chopper.

[0009] The eccentric electrode plate is used to apply the target high-voltage pulse signal output by the DC high-voltage chopper, converting the incoming DC beam or pulse beam into a pulse beam that meets the physical beam supply requirements.

[0010] Furthermore, the DC high-voltage chopper is equipped with:

[0011] The PWM signal generation module is used to generate PWM pulse signals with adjustable period, pulse width and delay in internal trigger mode or external trigger mode, based on the time parameters, case files and working mode control commands sent by the host computer.

[0012] The positive high voltage PWM input signal processing module is used to generate a drive signal based on the generated PWM pulse signal and output a positive high voltage during the PWM high level period;

[0013] The negative high voltage PWM command signal processing module is used to generate a drive signal based on the generated PWM pulse signal and output a negative high voltage during the PWM low level period;

[0014] The pulsed positive high voltage pre-drive module is used to generate a pulsed positive high voltage drive signal according to the corresponding drive signal.

[0015] The pulse negative high voltage pre-drive module is used to generate a pulse negative high voltage drive signal according to the corresponding drive signal;

[0016] The positive high voltage transformer module is used for electrical isolation and converts the pulse positive high voltage drive signal into four sets of corresponding consistent control signals.

[0017] The negative high-voltage transformer module is used for electrical isolation and converts the pulse negative high-voltage drive signal into four sets of corresponding consistent control signals.

[0018] The pulse positive high voltage final stage drive module is used to generate a pulse positive high voltage final stage drive signal according to the corresponding control signal.

[0019] The pulse negative high voltage final stage drive module is used to generate a pulse negative high voltage final stage drive signal according to the corresponding control signal.

[0020] The positive high voltage output module is used to generate a target positive high voltage pulse signal under the drive of the final stage of the pulse positive high voltage and the power supply of an external DC high voltage power supply;

[0021] The negative high voltage output module is used to generate a target negative high voltage pulse signal under the drive of the final stage of the pulse negative high voltage and the power supply of an external DC high voltage power supply;

[0022] The current and voltage sampling circuit is used to attenuate the target positive high voltage pulse signal and the target negative high voltage pulse signal to obtain voltage sampling signal and current sampling signal. The voltage sampling signal is used as the target high voltage pulse signal. When the value of the current sampling signal is greater than a preset threshold, the PWM pulse signal is turned off and the high voltage output is prohibited.

[0023] The control module is used to implement overcurrent and interlock protection of the DC high-voltage chopper, as well as high-voltage output enable and disable control, based on the control of the host computer.

[0024] Furthermore, the PWM signal generation module includes:

[0025] The optical event receiving circuit is used to receive the optical event trigger signal and send it to the FPGA module in external trigger mode;

[0026] The TCP / IP communication circuit is used to receive time parameters, example files and working mode control commands sent by the host computer and send them to the FPGA module.

[0027] The FPGA module is used to generate PWM pulse signals with corresponding time parameters in internal trigger mode based on the time parameters, case files, and working mode control commands issued by the host computer; in external trigger mode, it analyzes the received optical case trigger signals and compares them with pre-stored case signals. If they match, it generates PWM pulse signals with corresponding time parameters according to micropulse or macropulse working mode; otherwise, the DC high-voltage chopper operates in DC high-voltage output mode, outputs the target positive high-voltage pulse signal, and waits for the next optical case trigger cycle.

[0028] The AD sampling circuit is used to sample the target high-voltage pulse of the DC high-voltage chopper and send it to the host computer through the TCP / IP communication circuit to display the high-voltage pulse waveform of the beam chopper system.

[0029] A digital input circuit is used to sample digital signals and send them to the host computer through the TCP / IP communication circuit.

[0030] A PWM signal driving circuit is used to generate PWM pulse signals.

[0031] Furthermore, both the positive high-voltage PWM command signal processing module and the negative high-voltage PWM command signal processing module include:

[0032] A Schmitt trigger is used to perform pulse shaping on the PWM pulse signal generated by the PWM signal generation module.

[0033] The logic gate circuit is used to generate two pulse signals with the same period and duty cycle as the PWM pulse signal according to the given PWM pulse signal. One pulse signal has the same polarity as the PWM pulse signal, and the other pulse signal has the opposite polarity to the PWM pulse signal.

[0034] The dual rising edge positive D flip-flop has preset and clear functions. It is used in conjunction with the RC charging and discharging circuit to convert the two pulse signals with the same period and duty cycle as the PWM pulse signal generated by the logic gate circuit into two narrow pulses, which serve as the driving signals for the pulse positive high voltage pre-stage drive module and the pulse negative high voltage pre-stage drive module.

[0035] Furthermore, both the pulsed positive high voltage pre-stage drive module and the pulsed negative high voltage pre-stage drive module include two power MOSFET drive modules and four power MOS drive transistors, wherein the four power MOS drive transistors are a first P MOS transistor, a first N MOS transistor, a second P MOS transistor, and a second N MOS transistor, respectively.

[0036] The output terminals of the positive high-voltage PWM given signal processing module or the negative high-voltage PWM given signal processing module are respectively connected to the input terminals of the two power MOSFET driving modules. The output terminal of one power MOSFET driving module is respectively connected to the gates of the first P MOS transistor and the first N MOS transistor. The output terminal of the other power MOSFET driving module is respectively connected to the gates of the second P MOS transistor and the second N MOS transistor. The power MOSFET driving module is used to amplify the pulse high-voltage pre-stage driving signal as the driving signal for the subsequent four power MOSFET driving transistors. The drain of the first P MOS transistor and the drain of the first N MOS transistor are connected and also connected to the corresponding positive high-voltage transformer module or negative high-voltage transformer module. The drain of the second P MOS transistor is connected to the drain of the second N MOS transistor and also connected to the corresponding positive high-voltage transformer module or negative high-voltage transformer module. The sources of the first P MOS transistor and the second P MOS transistor are both connected to the output terminal of the power supply. The sources of the first N MOS transistor and the second N MOS transistor are both grounded.

[0037] Furthermore, both the pulsed positive high voltage final stage drive module and the pulsed negative high voltage final stage drive module include a first Schottky diode, a second Schottky diode, a third P MOS transistor, and a third N MOS transistor;

[0038] One end of the secondary side of the positive or negative high-voltage transformer module is connected in parallel to the anode of the first Schottky diode and the cathode of the second Schottky diode. The cathode of the first Schottky diode is connected to the source of the third PMOS transistor located above the circuit, and the anode of the second Schottky diode is connected to the source of the third NMOS transistor located below the circuit. The other end of the secondary side of the positive or negative high-voltage transformer module is connected to the gates of the third PMOS transistor and the third NMOS transistor, respectively. The drain of the third PMOS transistor is connected to the drain of the third NMOS transistor and connected to the corresponding positive or negative high-voltage output module to output a pulsed high-voltage final stage drive signal.

[0039] Furthermore, both the positive high voltage output module and the negative high voltage output module are composed of four fourth N MOS transistors connected in series;

[0040] In the positive high voltage output module, the gates of the four fourth N MOS transistors are respectively connected to the final stage drive module of the pulse positive high voltage. The drain of the fourth N MOS transistor located above the circuit is connected to the positive terminal of the external DC high voltage power supply or the high voltage power supply ground or the high voltage power supply positive terminal. The source of the fourth N MOS transistor located above the circuit is connected to the drain of the next stage fourth N MOS transistor connected in series with it, and so on. The source of the fourth N MOS transistor located below the circuit serves as the output terminal to output the target positive high voltage pulse signal.

[0041] In the negative high voltage output module, the gates of the four fourth N MOS transistors are respectively connected to the final stage drive module of the pulse negative high voltage. The source of the fourth N MOS transistor located below the circuit is connected to the negative terminal of the external DC high voltage power supply or the high voltage power supply ground or the negative terminal of the high voltage power supply. The drain of the fourth N MOS transistor located below the circuit is connected to the source of the next stage fourth N MOS transistor connected in series with it, and so on. The drain of the fourth N MOS transistor located above the circuit serves as the output terminal to output the target negative high voltage pulse signal.

[0042] Furthermore, the host computer is equipped with:

[0043] The parameter sending module is used to send the time parameters of the given PWM signal required for the DC high voltage chopper to generate high voltage pulses, the example file, and the working mode control command of the DC high voltage chopper. The working mode control command includes the internal trigger mode control command and the micro pulse or macro pulse control command in the external trigger mode.

[0044] The data acquisition module is used to acquire the target high-voltage pulse of the DC high-voltage chopper;

[0045] The data analysis module is used to compare the output sampled waveform of the target high-voltage pulse signal with the PWM pulse signal generated by the PWM signal generation module and to determine whether the output of the target high-voltage pulse signal is normal.

[0046] A DC high-voltage chopper control module is used to control the enabling, disabling, and resetting of the DC high-voltage chopper;

[0047] The display module is used to display the analysis results of the output sampling waveform of the target high-voltage pulse signal and the working status of the DC high-voltage chopper.

[0048] On the other hand, a method of using a beam chopper system for particle accelerators is provided, including:

[0049] The host computer sends the timing parameters, example files, and operating mode control commands of the given PWM signal required to generate high voltage pulses to the DC high voltage chopper.

[0050] The DC high-voltage chopper generates PWM pulse signals in the corresponding working mode based on the time parameters, case files and working mode control commands sent by the host computer. It converts the external DC voltage input into a target high-voltage pulse signal with the same time structure and amplitude as the DC high-voltage power supply output.

[0051] The eccentric electrode plate applies the target high-voltage pulse signal output by the DC high-voltage chopper, which converts the incoming DC beam or pulse beam into a pulse beam that meets the physical beam supply requirements.

[0052] The host computer acquires and analyzes the target high-voltage pulse signal from the DC high-voltage chopper.

[0053] Furthermore, the DC high-voltage chopper, based on time parameters, case files, and operating mode control commands issued by the host computer, generates a PWM pulse signal in the corresponding operating mode, converting the external DC voltage input into a high-voltage pulse output with the same time structure and amplitude as the DC high-voltage power supply output, including:

[0054] The PWM signal generation module generates PWM pulse signals with adjustable period, pulse width, and delay based on the time parameters, example files, and working mode control commands sent by the host computer, in either internal trigger mode or external trigger mode.

[0055] The positive high voltage PWM given signal processing module and the negative high voltage PWM given signal processing module generate the drive signals required by the corresponding pulse positive high voltage pre-stage drive module and pulse negative high voltage pre-stage drive module according to the generated PWM pulse signal.

[0056] The pulse positive high voltage pre-stage drive module and the pulse negative high voltage pre-stage drive module generate pulse positive high voltage drive signals for the primary side of the corresponding positive high voltage transformer module and pulse negative high voltage drive signals for the primary side of the negative high voltage transformer module according to the corresponding drive signals.

[0057] The positive high voltage transformer module and the negative high voltage transformer module are electrically isolated. At the same time, the corresponding pulse positive high voltage drive signal and pulse negative high voltage drive signal are converted into four sets of consistent control signals to drive the corresponding pulse positive high voltage final stage drive module and pulse negative high voltage final stage drive module.

[0058] The pulse positive high voltage final stage drive module and the pulse negative high voltage final stage drive module generate pulse positive high voltage final stage drive signals and pulse negative high voltage final stage drive signals for the corresponding positive high voltage output modules and negative high voltage output modules, respectively, according to the corresponding control signals.

[0059] Under the drive of the corresponding final stage drive signal and the power supply of an external DC high voltage power supply, the positive high voltage output module and the negative high voltage output module generate the corresponding target positive high voltage pulse signal and target negative high voltage pulse signal.

[0060] The voltage and current sampling circuit attenuates the target positive high voltage pulse signal and the target negative high voltage pulse signal to obtain voltage sampling signal and current sampling signal. The voltage sampling signal is used as the target high voltage pulse signal. When the value of the current sampling signal is greater than a preset threshold, the PWM pulse signal is turned off and high voltage output is prohibited.

[0061] The control module is based on the host computer and realizes overcurrent and interlock protection of the DC high voltage chopper, as well as high voltage output enable and disable control.

[0062] The present invention has the following advantages due to the adoption of the above technical solutions:

[0063] 1. This invention converts a DC beam or pulse beam passing through a vacuum tube into a pulse beam that meets the physical beam tuning requirements, so as to meet the pulse beam injection and accumulation requirements of experimental terminals and synchronous loop accelerator devices that use cyclotrons or linear accelerators as injectors.

[0064] 2. The DC high-voltage chopper of the present invention can achieve target high-voltage pulse output with adjustable repetition frequency, pulse width and pulse amplitude, and continuous high-voltage output with 100% duty cycle. The rise and fall times of the high-voltage pulse are less than 30ns, and the internal trigger mode and external trigger (optical event trigger) mode can be freely switched.

[0065] 3. The DC high-voltage chopper in this invention can also be applied to driving deflection plates, time-of-flight mass spectrometers, high-voltage pulse generators for biological cells, and plasma chemistry and other fields.

[0066] 4. This invention only requires a conventional DC high-voltage power supply (whose rated output voltage and rated power meet the requirements), without the need for customization, and has a simple structure and is easy to operate.

[0067] 5. This invention has a good fault protection mechanism. When the eccentric electrode plate of the beam chopper experiences arcing, the DC high-voltage chopper will quickly cut off the high-voltage output due to overcurrent, protecting the DC high-voltage chopper and the DC high-voltage power supply. At the same time, the DC high-voltage chopper will output an interlock signal, inserting the Faraday tube in front of the chopper system to cut off the beam, thus providing interlock protection for equipment and personal safety.

[0068] In summary, this invention can be widely applied in the field of particle accelerators. Attached Figure Description

[0069] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. In the drawings:

[0070] Figure 1 This is a schematic diagram of the overall structure of a beam chopper system provided in an embodiment of the present invention;

[0071] Figure 2 This is a schematic diagram of the structure of a DC high-voltage chopper provided in an embodiment of the present invention;

[0072] Figure 3 This is a schematic diagram of the PWM signal generation module in a DC high-voltage chopper provided in an embodiment of the present invention;

[0073] Figure 4 This is a schematic diagram of the positive high voltage PWM given signal processing module in a DC high voltage chopper provided in an embodiment of the present invention. Note: The circuit structure of the negative high voltage PWM given signal processing module is similar to that of the positive high voltage PWM given signal processing module.

[0074] Figure 5 This is a schematic diagram of the structure of the pulse positive high voltage pre-stage drive module in a DC high voltage chopper provided in an embodiment of the present invention. Note: The circuit structure of the pulse negative high voltage pre-stage drive module is similar to that of the pulse positive high voltage pre-stage drive module.

[0075] Figure 6 This is a schematic diagram of the structure of the pulse positive high voltage final stage drive module in a DC high voltage chopper provided in an embodiment of the present invention. Note: The circuit structure of the pulse negative high voltage final stage drive module is similar to that of the pulse positive high voltage final stage drive module.

[0076] Figure 7 This is a schematic diagram of the positive high voltage output module in a DC high voltage chopper provided in an embodiment of the present invention;

[0077] Figure 8 This is a schematic diagram of the negative high voltage output module in a DC high voltage chopper provided in an embodiment of the present invention;

[0078] Figure 9 This is a schematic diagram of the structure of an eccentric electrode plate provided in an embodiment of the present invention;

[0079] Figure 10 This is a schematic diagram of the working mode of macro pulse and micro pulse under internal trigger mode and external trigger mode provided in an embodiment of the present invention. Detailed Implementation

[0080] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0081] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0082] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0083] The beam chopper system for particle accelerators provided in this invention can be applied to a particle accelerator beam chopper unit to switch the DC beam or pulse beam drawn from a linear accelerator ion source into a pulse beam that meets the requirements of the experimental terminal. It provides a pulse beam that meets the requirements for beam injection and accumulation in a synchronous ring accelerator device that uses a cyclotron or linear accelerator as an injector. The DC high-voltage chopper involved in this invention can also be applied to driving deflection plates, time-of-flight mass spectrometers, high-voltage pulse generators for biological cells, and plasma chemistry and other fields.

[0084] Example 1

[0085] like Figure 1 As shown, this embodiment provides a beam chopper system for a particle accelerator, including a DC high-voltage chopper 1, a host computer 2, and an eccentric electrode plate 3.

[0086] The DC high-voltage chopper 1 is connected to an external DC high-voltage power supply. It is used to generate a PWM (Pulse Width Modulation) pulse signal (+5V) in the corresponding working mode based on the time parameters, case files and working mode control commands issued by the host computer 2. It converts the external DC voltage input into a target high-voltage pulse signal with the same time structure and amplitude as the DC high-voltage power supply output.

[0087] The host computer 2 is used to send the time parameters of the given PWM signal required for the DC high voltage chopper 1 to generate high voltage pulses, the example file, and the working mode control command of the DC high voltage chopper 1, to control the operation of the DC high voltage chopper 1, and to acquire and analyze the target high voltage pulse signal.

[0088] The eccentric electrode plate 3 is used to apply the target high-voltage pulse signal output by the DC high-voltage chopper 1, converting the incoming DC beam or pulse beam into a pulse beam that meets the physical beam supply requirements.

[0089] This invention is based on the high-voltage pulse signal output by the DC high-voltage chopper 1, which converts the DC beam or pulse beam passing through the vacuum pipe into a pulse beam that meets the physical beam tuning requirements, so as to meet the requirements of the experimental terminal and the synchronous ring accelerator device with a cyclotron or linear accelerator as the injector for beam injection and accumulation of the pulse beam.

[0090] In a preferred embodiment, the DC high-voltage chopper 1 is connected to the DC high-voltage power supply via a high-voltage shielded wire, the eccentric electrode plate 3 is connected to the output terminal of the DC high-voltage chopper 1 via a high-voltage shielded wire, and the host computer 2 is connected to the DC high-voltage chopper 1 via TCP / IP communication.

[0091] In a preferred embodiment, such as Figure 2 As shown, the DC high-voltage chopper 1 is equipped with a PWM signal generation module 100, a positive high-voltage PWM command signal processing module 101, a negative high-voltage PWM command signal processing module 102, a pulse positive high-voltage pre-stage drive module 103, a pulse negative high-voltage pre-stage drive module 104, a positive high-voltage transformer module 105, a negative high-voltage transformer module 106, a pulse positive high-voltage final stage drive module 107, a pulse negative high-voltage final stage drive module 108, a positive high-voltage output module 109, a negative high-voltage output module 110, a control module 111, and a voltage and current sampling circuit 112.

[0092] The PWM signal generation module 100 is used to generate PWM pulse signals with adjustable period, pulse width and delay in internal trigger mode or external trigger mode, based on the time parameters, example files and working mode control commands issued by the host computer 2.

[0093] The positive high voltage PWM given signal processing module 101 is used to generate the drive signal required by the pulse positive high voltage pre-drive module 103 according to the generated PWM pulse signal, and output positive high voltage during the PWM high level.

[0094] The negative high voltage PWM given signal processing module 102 is used to generate the drive signal required by the pulse negative high voltage pre-drive module 104 according to the generated PWM pulse signal, and output negative high voltage during the PWM low level.

[0095] The pulse positive high voltage front-end drive module 103 is used to generate a pulse positive high voltage drive signal on the primary side of the positive high voltage transformer module 105 according to the corresponding drive signal.

[0096] The pulse negative high voltage front-end drive module 104 is used to generate a pulse negative high voltage drive signal on the primary side of the negative high voltage transformer module 106 according to the corresponding drive signal.

[0097] The positive high voltage transformer module 105 is used to electrically isolate the positive high voltage PWM given signal processing module 101, the control module, the pulse positive high voltage pre-stage drive module 103, and the pulse positive high voltage final stage drive module 107. At the same time, it converts the pulse positive high voltage drive signal output by the pulse positive high voltage pre-stage drive module 103 on the original side into four corresponding sets of consistent control signals for driving the pulse positive high voltage final stage drive module 107.

[0098] The negative high voltage transformer module 106 is used to electrically isolate the negative high voltage PWM given signal processing module 102, the control module, the pulse negative high voltage pre-stage drive module 104, and the pulse negative high voltage final stage drive module 108. At the same time, it converts the pulse negative high voltage drive signal output by the pulse negative high voltage pre-stage drive module 104 on the original side into four corresponding sets of consistent control signals for driving the pulse negative high voltage final stage drive module 108.

[0099] The pulse positive high voltage final stage drive module 107 is used to generate a pulse positive high voltage final stage drive signal to control whether the SiC MOS transistor in the positive high voltage output module 109 is working (saturated or cutoff state) according to the corresponding control signal.

[0100] The pulse negative high voltage final stage drive module 108 is used to generate a pulse negative high voltage final stage drive signal to control whether the SiC MOS transistor in the negative high voltage output module 110 is working (saturated or cut off) according to the corresponding control signal.

[0101] The positive high voltage output module 109 is used to generate a target positive high voltage pulse signal under the drive of the final stage of the pulse positive high voltage and the power supply of an external DC high voltage power supply.

[0102] The negative high voltage output module 110 is used to generate a target negative high voltage pulse signal under the drive of the final stage of the pulse negative high voltage and the power supply of an external DC high voltage power supply.

[0103] The voltage and current sampling circuit 112 is used to attenuate the target positive high voltage pulse signal and the target negative high voltage pulse signal to obtain voltage sampling signal and current sampling signal. The voltage sampling signal is used as the target high voltage pulse signal. When the value of the current sampling signal is greater than the preset threshold, the PWM pulse signal is turned off and the high voltage output is prohibited.

[0104] The control module 111 is used for control based on the host computer 2 to realize overcurrent and interlock protection of the DC high voltage chopper 1, as well as high voltage output enable and disable control.

[0105] Specifically, such as Figure 3 As shown, the PWM signal generation module 100 includes an optical event receiving circuit 100-1, a TCP / IP communication circuit 100-2, an FPGA module 100-3, an AD sampling circuit 100-4, a digital input circuit 100-5, and a PWM signal driving circuit 100-6.

[0106] The optical event receiving circuit 100-1 is used to receive the optical event trigger signal and send it to the FPGA module 100-3 in external trigger mode.

[0107] TCP / IP communication circuit 100-2 is used to receive time parameters, example files and working mode control commands from host computer 2 and send them to FPGA module 100-3.

[0108] FPGA module 100-3 is used to generate PWM pulse signals with corresponding time parameters based on the time parameters, case files, and working mode control commands issued by the host computer 2. In internal trigger mode, it analyzes the received optical case trigger signals and compares them with the pre-stored case signals. If they match, it generates PWM pulse signals with corresponding time parameters according to the micro-pulse or macro-pulse working mode. If they do not match, it keeps the initial PWM output polarity unchanged (high level), and the DC high voltage chopper 1 operates in DC high voltage output mode, outputting the target positive high voltage pulse signal, waiting for the next optical case trigger cycle.

[0109] AD sampling circuit 100-4 is used to sample the output waveform of the target high voltage pulse signal of DC high voltage chopper 1 and send it to host computer 2 through TCP / IP communication circuit 100-2 to display the high voltage pulse waveform of the beam chopper system.

[0110] The digital input circuit 100-5 is used to sample digital signals such as overcurrent, interlock, enable, and power supply, and sends them to the host computer 2 via the TCP / IP communication circuit 100-2 to remotely monitor the working status of the DC high voltage chopper 1, so as to facilitate operators to make accurate and quick judgments.

[0111] The PWM signal drive circuit 100-6 is used to generate a +5V PWM pulse signal.

[0112] Specifically, such as Figure 4 As shown, both the positive high voltage PWM given signal processing module 101 and the negative high voltage PWM given signal processing module 102 include a Schmitt trigger 101-1, a logic gate circuit 101-2, a double rising edge positive D-type trigger 101-3, and an RC charging and discharging circuit 101-4.

[0113] The Schmitt trigger 101-1 is used to perform pulse shaping on the PWM pulse signal generated by the PWM signal generation module 100, thereby improving the circuit's anti-interference capability.

[0114] The logic gate circuit 101-2 is used to generate two pulse signals with the same period and duty cycle as the PWM pulse signal according to the given PWM pulse signal. One pulse signal has the same polarity as the PWM pulse signal, and the other pulse signal has the opposite polarity to the PWM pulse signal.

[0115] The dual rising edge positive D-type flip-flop 101-3 has preset and clear functions. It is used in conjunction with the RC charging and discharging circuit 101-4 to convert the two pulse signals with the same period and duty cycle as the PWM pulse signal generated by the logic gate circuit 101-2 into two narrow pulses, which serve as the driving signals for the pulse positive high voltage pre-stage drive module 103 and the pulse negative high voltage pre-stage drive module 104, thereby improving the rising and falling edge performance of the output target high voltage pulse.

[0116] More specifically, the logic gate circuit 101-2 includes an inverter, an XOR gate, and an AND gate. The inverter, XOR gate, and AND gate are used together to realize the function of the logic gate circuit 101-2. This part is the content disclosed in the prior art and will not be described in detail here.

[0117] Specifically, such as Figure 5 As shown, both the pulse positive high voltage pre-stage drive module 103 and the pulse negative high voltage pre-stage drive module 104 adopt a push-pull design and include two high-speed power MOSFET drive modules 103-1 and four high-speed power MOS drive transistors. The four high-speed power MOS drive transistors are the first P MOS transistor 103-2, the first N MOS transistor 103-3, the second P MOS transistor 103-4, and the second N MOS transistor 103-5.

[0118] The output of either the positive high-voltage PWM signal processing module 101 or the negative high-voltage PWM signal processing module 102 is connected to the input of either of the two high-speed power MOSFET driver modules 103-1. The output of one high-speed power MOSFET driver module 103-1 is connected to the gates of the first P-MOSFET 103-2 and the first N-MOSFET 103-3, respectively. The output of the other high-speed power MOSFET driver module 103-1 is connected to the gates of the second P-MOSFET 103-4 and the second N-MOSFET 103-5, respectively. The high-speed power MOSFET driver module 103-1 amplifies the pulse high-voltage pre-stage drive signal, using it as the drive signal for the subsequent four high-speed power MOSFETs. The drains of the first P-MOSFET 103-2 and the first N-MOSFET 103-3 are connected and also connected to the corresponding positive high-voltage transformer module 105 or negative high-voltage transformer module 106. The second P-MOSFET... The drain of MOSFET 103-4 is connected to the drain of the second NMOS transistor 103-5 and also to the corresponding positive high-voltage transformer module 105 or negative high-voltage transformer module 106. The sources of the first PMOS transistor 103-2 and the second PMOS transistor 103-4 are both connected to the output terminal of the 80V power supply input through circuit conversion on the DC high-voltage chopper board. The sources of the first NMOS transistor 103-3 and the second NMOS transistor 103-5 are both grounded. Because the four high-speed power MOSFETs operate in push-pull mode, only one of the two symmetrical switching transistors is conducting at a time, resulting in low loss, high efficiency, improved circuit load capacity, increased switching speed, and enhanced rise and fall edge performance of the target high-voltage pulse.

[0119] Specifically, such as Figure 6 As shown, both the pulse positive high voltage final stage drive module 107 and the pulse negative high voltage final stage drive module 108 include a first Schottky diode 107-1, a second Schottky diode 107-2, a third P MOS transistor 107-3, and a third N MOS transistor 107-4.

[0120] One end of the secondary side of the positive high voltage transformer module 105 or the negative high voltage transformer module 106 is connected in parallel to the anode of the first Schottky diode 107-1 and the cathode of the second Schottky diode 107-2. The cathode of the first Schottky diode 107-1 is connected to the source of the third P MOS transistor 107-3 located above the circuit. The anode of the second Schottky diode 107-2 is connected to the source of the third N MOS transistor 107-4 located below the circuit. The other end of the secondary side of the positive high voltage transformer module 105 or the negative high voltage transformer module 106 is connected to the gates of the third P MOS transistor 107-3 and the third N MOS transistor 107-4, respectively. The drain of the third P MOS transistor 107-3 is connected to the drain of the third N MOS transistor 107-4 and connected to the corresponding positive high voltage output module 109 or the negative high voltage output module 110, outputting a pulse high voltage final stage drive signal as the gate of the SiC MOS transistor (N-type) of the high voltage output module. When the control signal on the secondary side is positive at the top and negative at the bottom, the third P MOS transistor 107-3 located above the circuit is turned on through the first Schottky diode 107-1 connected in series with it, and the N MOS transistor in the high-voltage output module is turned on to output high voltage. At this time, the third N MOS transistor 107-4 located below the circuit is in the off state due to the presence of the second Schottky diode 107-2 connected in series with it. When the control signal on the secondary side is negative at the top and positive at the bottom, the third P MOS transistor 107-3 located above the circuit is turned off, causing the N MOS transistor in the high-voltage output module to be turned off. At this time, the third N MOS transistor 107-4 located below the circuit is turned on, and the N MOS transistor in the high-voltage output module will quickly release charge through the circuit of the third N MOS transistor 107-4 located below the circuit and the second Schottky diode 107-2 connected in series with it, ensuring that the high-voltage output N MOS transistor is turned off quickly and reliably.

[0121] Specifically, both the positive high-voltage output module 109 and the negative high-voltage output module 110 are composed of four fourth N-MOSFETs 109-1 connected in series. For example... Figure 7 As shown, in the positive high voltage output module 109, the gates of the four fourth NMOS transistors 109-1 are respectively connected to the pulse positive high voltage final stage drive module 107. The drain of the fourth NMOS transistor 109-1 located above the circuit is connected to the positive terminal (single-ended positive to ground output) or the high voltage power supply ground (single-ended negative to ground output) or the high voltage power supply positive terminal (bipolar output). The source of the fourth NMOS transistor 109-1 located above the circuit is connected to the drain of the next stage fourth NMOS transistor 109-1 connected in series with it, and so on. The source of the fourth NMOS transistor 109-1 located below the circuit serves as the output terminal to output the target positive high voltage pulse signal. Figure 8As shown, in the negative high-voltage output module 110, the gates of four fourth NMOS transistors 109-1 are respectively connected to the pulse negative high-voltage final stage drive module 108. The source of the fourth NMOS transistor 109-1 located at the bottom of the circuit is connected to the negative terminal of the external DC high-voltage power supply (single-ended negative to ground output), the high-voltage power supply ground (single-ended positive to ground output), or the high-voltage power supply negative terminal (bipolar output). The drain of the fourth NMOS transistor 109-1 located at the bottom of the circuit is connected to the source of the next stage fourth NMOS transistor 109-1 connected in series with it, and so on. The drain of the fourth NMOS transistor 109-1 located at the top of the circuit serves as the output terminal to output the target negative high-voltage pulse signal. Under the drive of the pulse high-voltage final stage drive signal, and simultaneously with the external DC high-voltage power supply, the target high-voltage pulse signal is generated (when the PWM pulse signal is high, a positive high-voltage pulse signal is output; when the PWM pulse signal is low, a negative high-voltage pulse signal is output).

[0122] More specifically, the fourth N-MOSFET 109-1 can be characterized by low on-resistance, low switching loss, high operating frequency, good high-temperature stability, and V... DS An N-type SiC MOS transistor with a voltage of 1200V.

[0123] Specifically, the control module includes an overcurrent control module, an interlock control module, and an enable control module. The overcurrent control module operates as follows:

[0124] The current sampling signal output by the voltage and current sampling circuit 112, together with the threshold set by the overcurrent protection via the potentiometer, acts on the two input terminals of the comparator. When the current sampling signal value is greater than the set threshold, a high level is output to the control module, turning off the PWM pulse signal and prohibiting high voltage output.

[0125] The working process of the interlocking control module is as follows:

[0126] In accelerator applications or other applications, the load operates under vacuum. When the load vacuum is at a critical vacuum level, arcing can easily occur, causing damage to the equipment. Therefore, a vacuum interlock is required. When the actual vacuum condition exceeds the set interlock threshold, the interlock signal (from an external PLC controller, which is a node signal with two states: open and closed. Under normal vacuum conditions, the interlock signal is in a closed state (0 level), otherwise it is in an open state (high level)) is set high, prohibiting high voltage output.

[0127] The working process of the enable control module is as follows:

[0128] To facilitate the monitoring of overcurrent, interlock, enable / disable, and equipment power supply status, the overcurrent status signal (a switch quantity, normally 0 level), interlock status signal (normally 0 level), enable / disable status signal (enable is high level +5V, disable is low level 0V), and equipment power supply status signal (power supply status signal, normally high level +5V, otherwise low level 0V) are connected to the tri-state output buffer circuit of the PWM signal generation module 100. The overcurrent status switch quantity, interlock status switch quantity, enable / disable status switch quantity, and equipment power supply status switch quantity are sent to the host computer 2 through the TCP / IP communication circuit 100-2 of the PWM signal generation module 100 to display their working status, facilitating accurate and quick judgment by the operator. The tri-state output buffer circuit is used to temporarily store the output of the above switch quantities and isolate the above switch quantities from the FPGA module 100-3 of the PWM signal generation module 100, thereby protecting the main chip of the FPGA module 100-3.

[0129] In a preferred embodiment, such as Figure 9 As shown, the eccentric electrode plate 3 is installed in the vacuum chamber through a CF150 flange, and the electrode plate connection terminal led out from the flange is connected to the output terminal of the DC high voltage chopper 1 through a high voltage shielded wire.

[0130] In a preferred embodiment, the host computer 2 is equipped with a parameter sending module, a data acquisition module, a data analysis module, a DC high-voltage chopper control module, and a display module.

[0131] The parameter sending module is used to send the time parameters, example files, and operating mode control commands of the DC high-voltage chopper 1 for the given PWM signal required to generate high-voltage pulses. The time parameters include period, pulse width, and delay. The operating mode control commands include internal trigger mode control commands and micro-pulse or macro-pulse control commands in external trigger mode, such as... Figure 10 As shown.

[0132] The data acquisition module is used to acquire the output sampling waveform of the target high voltage pulse signal of the DC high voltage chopper 1.

[0133] The data analysis module is used to analyze the output sampling waveform of the target high voltage pulse signal, compare the output sampling waveform of the target high voltage pulse signal with the PWM pulse signal generated by the PWM signal generation module 100 (including the period and duty cycle of the PWM signal - which should be consistent under normal circumstances), and determine whether the output of the target high voltage pulse signal is normal (if they are consistent, it is normal; otherwise, it is abnormal).

[0134] The DC high voltage chopper control module is used to control the enabling, disabling, and resetting of DC high voltage chopper 1.

[0135] The display module is used to display the analysis results of the output sampling waveform of the target high-voltage pulse signal and the working status of the DC high-voltage chopper 1 (power supply, interlock, overcurrent, enable / disable).

[0136] Example 2

[0137] This embodiment provides a method for using a beam chopper system for a particle accelerator, including the following steps:

[0138] 1) The host computer 2 sends the time parameters, example files, and working mode control commands of the given PWM signal required to generate high voltage pulses to the DC high voltage chopper 1.

[0139] 2) Based on the time parameters, example files, and operating mode control commands issued by the host computer 2, the DC high-voltage chopper 1 generates a PWM pulse signal (+5V) in the corresponding operating mode, converting the external DC voltage input into a target high-voltage pulse signal with the same time structure and amplitude as the DC high-voltage power supply output, specifically:

[0140] 2.1) The PWM signal generation module 100 generates PWM pulse signals with adjustable period, pulse width and delay based on the time parameters, case files and working mode control commands sent by the host computer 2, in internal trigger mode or external trigger mode.

[0141] 2.2) The positive high voltage PWM given signal processing module 101 and the negative high voltage PWM given signal processing module 102 generate the drive signals required by the corresponding pulse positive high voltage pre-drive module 103 and pulse negative high voltage pre-drive module 104 according to the generated PWM pulse signals.

[0142] 2.3) The pulse positive high voltage pre-drive module 103 and the pulse negative high voltage pre-drive module 104 generate pulse positive high voltage drive signals for the primary side of the corresponding positive high voltage transformer module 105 and pulse negative high voltage drive signals for the primary side of the negative high voltage transformer module 106 according to the corresponding drive signals.

[0143] 2.4) The positive high voltage transformer module 105 and the negative high voltage transformer module 106 are electrically isolated. At the same time, the corresponding pulse positive high voltage drive signal and pulse negative high voltage drive signal are converted into four sets of consistent control signals to drive the corresponding pulse positive high voltage final stage drive module 107 and pulse negative high voltage final stage drive module 108.

[0144] 2.5) The pulse positive high voltage final stage drive module 107 and the pulse negative high voltage final stage drive module 108 generate pulse positive high voltage final stage drive signals to control the corresponding positive high voltage output module 109 and the pulse negative high voltage final stage drive signals to control the corresponding negative high voltage output module 110 according to the corresponding control signals.

[0145] 2.6) The positive high voltage output module 109 and the negative high voltage output module 110 generate the corresponding target positive high voltage pulse signal and target negative high voltage pulse signal under the drive of the corresponding final stage drive signal and the power supply of the external DC high voltage power supply.

[0146] 2.7) The voltage and current sampling circuit 112 attenuates the target positive high voltage pulse signal and the target negative high voltage pulse signal to obtain voltage sampling signal and current sampling signal. The voltage sampling signal is used as the target high voltage pulse signal. When the value of the current sampling signal is greater than the preset threshold, the PWM pulse signal is turned off and the high voltage output is prohibited.

[0147] 2.8) The control module is based on the control of the host computer 2 to realize the overcurrent and interlock protection of the DC high voltage chopper 1, as well as the high voltage output enable and disable control.

[0148] 3) The eccentric electrode plate 3 applies a high-voltage pulse signal output by the DC high-voltage chopper 1 to convert the incoming DC beam or pulse beam into a pulse beam that meets the physical beam supply requirements.

[0149] 4) The host computer 2 acquires and analyzes the output sampling waveform of the target high-voltage pulse signal from the DC high-voltage chopper 1, specifically as follows:

[0150] 4.1) The data acquisition module acquires the output sampling waveform of the target high voltage pulse signal of the DC high voltage chopper 1.

[0151] 4.2) The data analysis module compares the output sampling waveform of the target high-voltage pulse signal with the PWM pulse signal generated by the PWM signal generation module 100, and determines whether the output of the target high-voltage pulse signal is normal.

[0152] 4.3) The display module displays the analysis results of the output sampling waveform of the target high voltage pulse signal and the working status of DC high voltage chopper 1 (power supply, interlock, overcurrent, enable / disable).

[0153] The above embodiments are only used to illustrate the present invention. The structure, connection method and manufacturing process of each component can be varied. All equivalent transformations and improvements made on the basis of the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. A beam chopping system for a particle accelerator, characterized in that, Includes a DC high-voltage chopper, a host computer, and an eccentric electrode plate; The DC high-voltage chopper is connected to an external DC high-voltage power supply and is used to generate PWM pulse signals in the corresponding working mode based on the time parameters, case files and working mode control commands issued by the host computer. It converts the external DC voltage input into a target high-voltage pulse signal with the same time structure and amplitude as the DC high-voltage power supply output. The host computer is used to send the time parameters of the given PWM signal required for the DC high voltage chopper to generate high voltage pulses, the case file, and the working mode control command of the DC high voltage chopper, to control the operation of the DC high voltage chopper, and to acquire and analyze the target high voltage pulse signal of the DC high voltage chopper. The eccentric electrode plate is used to apply the target high-voltage pulse signal output by the DC high-voltage chopper, converting the incoming DC beam or pulse beam into a pulse beam that meets the physical beam supply requirements. The DC high-voltage chopper is equipped with: The PWM signal generation module is used to generate PWM pulse signals with adjustable period, pulse width and delay in internal trigger mode or external trigger mode, based on the time parameters, case files and working mode control commands sent by the host computer. The positive high voltage PWM input signal processing module is used to generate a drive signal based on the generated PWM pulse signal and output a positive high voltage during the PWM high level period; The negative high voltage PWM command signal processing module is used to generate a drive signal based on the generated PWM pulse signal and output a negative high voltage during the PWM low level period; The pulsed positive high voltage pre-drive module is used to generate a pulsed positive high voltage drive signal according to the corresponding drive signal. The pulse negative high voltage pre-drive module is used to generate a pulse negative high voltage drive signal according to the corresponding drive signal; The positive high voltage transformer module is used for electrical isolation and converts the pulse positive high voltage drive signal into four sets of corresponding consistent control signals. The negative high-voltage transformer module is used for electrical isolation and converts the pulse negative high-voltage drive signal into four sets of corresponding consistent control signals. The pulse positive high voltage final stage drive module is used to generate a pulse positive high voltage final stage drive signal according to the corresponding control signal. The pulse negative high voltage final stage drive module is used to generate a pulse negative high voltage final stage drive signal according to the corresponding control signal. The positive high voltage output module is used to generate a target positive high voltage pulse signal under the drive of the final stage of the pulse positive high voltage and the power supply of an external DC high voltage power supply; The negative high voltage output module is used to generate a target negative high voltage pulse signal under the drive of the final stage of the pulse negative high voltage and the power supply of an external DC high voltage power supply; The current and voltage sampling circuit is used to attenuate the target positive high voltage pulse signal and the target negative high voltage pulse signal to obtain voltage sampling signal and current sampling signal. The voltage sampling signal is used as the target high voltage pulse signal. When the value of the current sampling signal is greater than the preset threshold, the PWM pulse signal is turned off, and high voltage output is prohibited. The control module is used to implement overcurrent and interlock protection of the DC high-voltage chopper, as well as high-voltage output enable and disable control, based on the control of the host computer.

2. The beam chopper system for a particle accelerator as described in claim 1, characterized in that, The PWM signal generation module includes: The optical event receiving circuit is used to receive the optical event trigger signal and send it to the FPGA module in external trigger mode; The TCP / IP communication circuit is used to receive time parameters, example files and working mode control commands sent by the host computer and send them to the FPGA module. The FPGA module is used to generate PWM pulse signals with corresponding time parameters in internal trigger mode based on the time parameters, case files, and working mode control commands issued by the host computer; in external trigger mode, it analyzes the received optical case trigger signals and compares them with pre-stored case signals. If they match, it generates PWM pulse signals with corresponding time parameters according to micropulse or macropulse working mode; otherwise, the DC high-voltage chopper operates in DC high-voltage output mode, outputs the target positive high-voltage pulse signal, and waits for the next optical case trigger cycle. The AD sampling circuit is used to sample the target high-voltage pulse of the DC high-voltage chopper and send it to the host computer through the TCP / IP communication circuit to display the high-voltage pulse waveform of the beam chopper system. A digital input circuit is used to sample digital signals and send them to the host computer through the TCP / IP communication circuit. A PWM signal driving circuit is used to generate PWM pulse signals.

3. The beam chopper system for a particle accelerator as described in claim 1, characterized in that, Both the positive high-voltage PWM command signal processing module and the negative high-voltage PWM command signal processing module include: A Schmitt trigger is used to perform pulse shaping on the PWM pulse signal generated by the PWM signal generation module. The logic gate circuit is used to generate two pulse signals with the same period and duty cycle as the PWM pulse signal according to the given PWM pulse signal. One pulse signal has the same polarity as the PWM pulse signal, and the other pulse signal has the opposite polarity to the PWM pulse signal. The dual rising edge positive D flip-flop has preset and clear functions. It is used in conjunction with the RC charging and discharging circuit to convert the two pulse signals with the same period and duty cycle as the PWM pulse signal generated by the logic gate circuit into two narrow pulses, which serve as the driving signals for the pulse positive high voltage pre-stage drive module and the pulse negative high voltage pre-stage drive module.

4. A beam chopping system for a particle accelerator as described in claim 1, characterized in that, Both the pulsed positive high voltage pre-stage drive module and the pulsed negative high voltage pre-stage drive module include two power MOSFET drive modules and four power MOS drive transistors, wherein the four power MOS drive transistors are a first P MOS transistor, a first N MOS transistor, a second P MOS transistor, and a second N MOS transistor, respectively. The output terminals of the positive high-voltage PWM given signal processing module or the negative high-voltage PWM given signal processing module are respectively connected to the input terminals of the two power MOSFET driving modules. The output terminal of one power MOSFET driving module is respectively connected to the gates of the first P MOS transistor and the first N MOS transistor. The output terminal of the other power MOSFET driving module is respectively connected to the gates of the second P MOS transistor and the second N MOS transistor. The power MOSFET driving module is used to amplify the pulse high-voltage pre-stage driving signal as the driving signal for the subsequent four power MOSFET driving transistors. The drain of the first P MOS transistor and the drain of the first N MOS transistor are connected and also connected to the corresponding positive high-voltage transformer module or negative high-voltage transformer module. The drain of the second P MOS transistor is connected to the drain of the second N MOS transistor and also connected to the corresponding positive high-voltage transformer module or negative high-voltage transformer module. The sources of the first P MOS transistor and the second P MOS transistor are both connected to the output terminal of the power supply. The sources of the first N MOS transistor and the second N MOS transistor are both grounded.

5. A beam chopper system for a particle accelerator as described in claim 1, characterized in that, Both the pulsed positive high voltage final stage drive module and the pulsed negative high voltage final stage drive module include a first Schottky diode, a second Schottky diode, a third P MOS transistor, and a third N MOS transistor; One end of the secondary side of the positive or negative high-voltage transformer module is connected in parallel to the anode of the first Schottky diode and the cathode of the second Schottky diode. The cathode of the first Schottky diode is connected to the source of the third PMOS transistor located above the circuit, and the anode of the second Schottky diode is connected to the source of the third NMOS transistor located below the circuit. The other end of the secondary side of the positive or negative high-voltage transformer module is connected to the gates of the third PMOS transistor and the third NMOS transistor, respectively. The drain of the third PMOS transistor is connected to the drain of the third NMOS transistor and connected to the corresponding positive or negative high-voltage output module to output a pulsed high-voltage final stage drive signal.

6. A beam chopper system for a particle accelerator as described in claim 1, characterized in that, Both the positive high voltage output module and the negative high voltage output module are composed of four fourth N MOS transistors connected in series; In the positive high voltage output module, the gates of the four fourth N MOS transistors are respectively connected to the final stage drive module of the pulse positive high voltage. The drain of the fourth N MOS transistor located above the circuit is connected to the positive terminal of the external DC high voltage power supply or the high voltage power supply ground or the high voltage power supply positive terminal. The source of the fourth N MOS transistor located above the circuit is connected to the drain of the next stage fourth N MOS transistor connected in series with it, and so on. The source of the fourth N MOS transistor located below the circuit serves as the output terminal to output the target positive high voltage pulse signal. In the negative high voltage output module, the gates of the four fourth N MOS transistors are respectively connected to the final stage drive module of the pulse negative high voltage. The source of the fourth N MOS transistor located below the circuit is connected to the negative terminal of the external DC high voltage power supply or the high voltage power supply ground or the negative terminal of the high voltage power supply. The drain of the fourth N MOS transistor located below the circuit is connected to the source of the next stage fourth N MOS transistor connected in series with it, and so on. The drain of the fourth N MOS transistor located above the circuit serves as the output terminal to output the target negative high voltage pulse signal.

7. A beam chopper system for a particle accelerator as described in claim 1, characterized in that, The host computer is equipped with: The parameter sending module is used to send the time parameters of the given PWM signal required for the DC high voltage chopper to generate high voltage pulses, the example file, and the working mode control command of the DC high voltage chopper. The working mode control command includes the internal trigger mode control command and the micro pulse or macro pulse control command in the external trigger mode. The data acquisition module is used to acquire the target high-voltage pulse of the DC high-voltage chopper; The data analysis module is used to compare the output sampled waveform of the target high-voltage pulse signal with the PWM pulse signal generated by the PWM signal generation module and to determine whether the output of the target high-voltage pulse signal is normal. A DC high-voltage chopper control module is used to control the enabling, disabling, and resetting of the DC high-voltage chopper; The display module is used to display the analysis results of the output sampling waveform of the target high-voltage pulse signal and the working status of the DC high-voltage chopper.

8. A method of using a beam chopper system for a particle accelerator based on any one of claims 1 to 7, characterized in that, include: The host computer sends the timing parameters, example files, and operating mode control commands of the given PWM signal required to generate high voltage pulses to the DC high voltage chopper. The DC high-voltage chopper generates PWM pulse signals in the corresponding working mode based on the time parameters, case files and working mode control commands sent by the host computer. It converts the external DC voltage input into a target high-voltage pulse signal with the same time structure and amplitude as the DC high-voltage power supply output. The eccentric electrode plate applies the target high-voltage pulse signal output by the DC high-voltage chopper, which converts the incoming DC beam or pulse beam into a pulse beam that meets the physical beam supply requirements. The host computer acquires and analyzes the target high-voltage pulse signal from the DC high-voltage chopper.

9. The method of use as described in claim 8, characterized in that, The DC high-voltage chopper generates PWM pulse signals for the corresponding operating mode based on time parameters, case files, and operating mode control commands issued by the host computer. It converts the external DC voltage input into a high-voltage pulse output with the same time structure and amplitude as the DC high-voltage power supply output, including: The PWM signal generation module generates PWM pulse signals with adjustable period, pulse width, and delay based on the time parameters, example files, and working mode control commands sent by the host computer, in either internal trigger mode or external trigger mode. The positive high voltage PWM given signal processing module and the negative high voltage PWM given signal processing module generate the drive signals required by the corresponding pulse positive high voltage pre-stage drive module and pulse negative high voltage pre-stage drive module according to the generated PWM pulse signal. The pulse positive high voltage pre-stage drive module and the pulse negative high voltage pre-stage drive module generate pulse positive high voltage drive signals for the primary side of the corresponding positive high voltage transformer module and pulse negative high voltage drive signals for the primary side of the negative high voltage transformer module according to the corresponding drive signals. The positive high voltage transformer module and the negative high voltage transformer module are electrically isolated. At the same time, the corresponding pulse positive high voltage drive signal and pulse negative high voltage drive signal are converted into four sets of consistent control signals to drive the corresponding pulse positive high voltage final stage drive module and pulse negative high voltage final stage drive module. The pulse positive high voltage final stage drive module and the pulse negative high voltage final stage drive module generate pulse positive high voltage final stage drive signals and pulse negative high voltage final stage drive signals for the corresponding positive high voltage output modules and negative high voltage output modules, respectively, according to the corresponding control signals. Under the drive of the corresponding final stage drive signal and the power supply of an external DC high voltage power supply, the positive high voltage output module and the negative high voltage output module generate the corresponding target positive high voltage pulse signal and target negative high voltage pulse signal. The voltage and current sampling circuit attenuates the target positive high voltage pulse signal and the target negative high voltage pulse signal to obtain voltage sampling signal and current sampling signal. The voltage sampling signal is used as the target high voltage pulse signal. When the value of the current sampling signal is greater than a preset threshold, the PWM pulse signal is turned off and high voltage output is prohibited. The control module is based on the host computer and realizes overcurrent and interlock protection of the DC high voltage chopper, as well as high voltage output enable and disable control.

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