A low-jitter high-voltage bipolar pulse source and a pulse timing control method

Abstract

This invention discloses a low-jitter, high-voltage bipolar pulse source and a pulse timing control method, solving the problem that existing bipolar pulse sources struggle to accurately control the time synchronization of positive and negative pulses. This invention ensures high-precision synchronization of positive and negative pulses through a pulse transformer with a center tap; it effectively reduces overall system time jitter by selecting a pseudo-spark switch in the primary circuit of the pulse transformer; it maintains time synchronization by using a measurement unit to measure pulse voltage; and it allows for fine-tuning of the bipolar pulse output timing by adjusting the breakdown state of the switches in the two-stage compression circuit.

Description

Technical Field

[0001] This invention relates to a bipolar pulse source and a pulse timing control method, specifically to a low-jitter, high-voltage bipolar pulse source and a pulse timing control method. Background Technology

[0002] High-power electromagnetic pulse (HMP) testing devices require the generation of high-voltage pulses with nanosecond-level rise times. Compared to unipolar pulse driving methods, bipolar pulse driving devices employ a symmetrical structural design, generating fast-rising-edge pulses of positive and negative polarities from both sides respectively, and superimposing them at the load end for output. Under the same technical requirements, the primary pulse voltage of this structure is only half that of unipolar pulse driving, significantly reducing the insulation requirements of the primary pulse source. This advantage creates favorable conditions for constructing high-power electromagnetic pulse testing devices with higher technical specifications, helping to achieve a stronger radiation field output. However, timing synchronization is a core challenge in the design and operation of bipolar pulse sources. Significant deviations in the timing of the pulses on both sides will directly lead to output waveform distortion; in severe cases, the resulting asymmetrical voltage can cause excessively high voltages on peaking devices, resulting in insulation damage.

[0003] Existing bipolar pulse source devices typically employ Marx generator technology. However, due to the breakdown process of the two Marx generators and their subsequent intermediate storage switches having a time dispersion of tens of nanoseconds or even longer, it is difficult to accurately control the time synchronization of positive and negative pulses. Summary of the Invention

[0004] To address the technical problem of the difficulty in accurately controlling the time synchronization of positive and negative pulses in existing bipolar pulse sources, this invention provides a low-jitter, high-voltage bipolar pulse source and a pulse timing control method.

[0005] The inventive concept of this invention:

[0006] A pulse transformer with a center tap ensures high-precision synchronization of positive and negative pulses; a pseudo-spark switch is selected in the primary circuit of the pulse transformer to effectively reduce the overall system time jitter; pulse voltage measurement is performed using a measurement unit to maintain time synchronization; and the output timing of bipolar pulses can be finely adjusted by adjusting the breakdown state of the switches in the two-stage compression circuit.

[0007] To achieve the above objectives and complete the above inventive concept, the present invention adopts the following technical solution:

[0008] A low-jitter, high-voltage bipolar pulse source for connecting positive and negative polarity loads, characterized by:

[0009] It includes a pseudo-spark switch, a primary energy storage capacitor, a pulse transformer, and an energy storage and discharge unit; the energy storage and discharge unit includes a positive primary energy storage capacitor, a negative primary energy storage capacitor, a positive primary compression switch, and a negative primary compression switch.

[0010] One end of the pseudo-spark switch is connected to one end of the primary energy storage capacitor, and the other end is grounded.

[0011] The other end of the primary energy storage capacitor is connected to one end of the primary winding of the pulse transformer;

[0012] The primary winding of the pulse transformer is grounded at one end, one end of the secondary winding is connected to one end of the positive primary energy storage capacitor, and the other end of the secondary winding is connected to one end of the negative primary energy storage capacitor. The center tap of the secondary winding of the pulse transformer, the other end of the positive primary energy storage capacitor, and the other end of the negative primary energy storage capacitor are all grounded.

[0013] One end of the positive polarity primary compression switch is connected to one end of the positive polarity primary energy storage capacitor, and the other end serves as the output positive terminal of the energy storage discharge unit, used to connect to a positive polarity load.

[0014] One end of the negative polarity primary compression switch is connected to one end of the negative polarity primary energy storage capacitor, and the other end serves as the output negative terminal of the energy storage discharge unit, used to connect to a negative polarity load.

[0015] Furthermore, the energy storage and discharge unit also includes a positive polarity secondary energy storage capacitor, a negative polarity secondary energy storage capacitor, a positive polarity secondary compression switch, and a negative polarity secondary compression switch;

[0016] One end of the positive polarity secondary energy storage capacitor is connected to the other end of the positive polarity primary compression switch, and the other end is grounded;

[0017] One end of the negative polarity secondary energy storage capacitor is connected to the other end of the negative polarity primary compression switch, and the other end is grounded;

[0018] One end of the positive polarity secondary compression switch is connected to one end of the positive polarity secondary energy storage capacitor;

[0019] One end of the negative polarity secondary compression switch is connected to one end of the negative polarity secondary energy storage capacitor;

[0020] The other end of the positive polarity two-stage compression switch serves as the positive output terminal of the energy storage and discharge unit, and is used to connect to a positive polarity load.

[0021] The other end of the negative polarity secondary compression switch serves as the output negative terminal of the energy storage discharge unit, used to connect to a negative polarity load.

[0022] Furthermore, it also includes a measurement unit;

[0023] The measurement unit includes a resistor voltage divider, two differential voltage probes respectively connected to the two input terminals of the resistor voltage divider, and an oscilloscope connected to the output terminal of the resistor voltage divider.

[0024] Two differential voltage probes are used to connect to the voltage measurement ports of the positive and negative loads, respectively, to measure the voltage of the positive and negative loads and display the corresponding pulse waveforms on an oscilloscope.

[0025] Furthermore, it also includes a central control unit;

[0026] The main control unit is electrically connected to the pseudo-spark switch, the positive polarity primary compression switch, and the negative polarity primary compression switch, respectively.

[0027] Furthermore, the operating voltage range of the pseudo-spark switch is 40 kV - 60 kV;

[0028] The operating voltage range of the primary energy storage capacitor is 50 kV - 70 kV;

[0029] The ratio of the number of turns in the primary coil to the number of turns in the secondary coil of the pulse transformer ranges from 1:12 to 1:8.

[0030] The nominal capacitance values ​​of both the positive and negative primary energy storage capacitors range from 220 pF to 320 pF.

[0031] The nominal capacitance values ​​of both the positive and negative polarity secondary energy storage capacitors range from 130 pF to 230 pF.

[0032] Furthermore, the operating voltage of the primary energy storage capacitor is 60 kV;

[0033] The ratio of the number of turns in the primary coil to the number of turns in the secondary coil of the pulse transformer is 1:10;

[0034] The nominal capacitance value of both the positive and negative primary energy storage capacitors is 270 pF.

[0035] The nominal capacitance of both the positive and negative secondary energy storage capacitors is 180 pF.

[0036] A pulse timing control method, based on the aforementioned low-jitter high-voltage bipolar pulse source, is characterized by including the following steps:

[0037] Step 1: Connect the positive and negative loads to the low-jitter high-voltage bipolar pulse source described above, and demagnetize the pulse transformer.

[0038] Step 2: Inflate the dummy spark switch, positive polarity primary compression switch, and negative polarity primary compression switch to the working pressure;

[0039] Step 3: Charge the primary energy storage capacitor to the operating voltage;

[0040] Step 4: Turn on the pseudo-spark switch. The primary energy storage capacitor discharges to the primary winding of the pulse transformer. The secondary winding of the pulse transformer is momentarily induced by voltage and simultaneously charges the positive and negative primary energy storage capacitors.

[0041] Step 5: When the voltages of the positive and negative primary energy storage capacitors reach the switching thresholds of the positive and negative primary compression switches respectively, both the positive and negative primary compression switches will be turned on. Then, the positive and negative loads will receive positive and negative voltage pulses respectively. The positive and negative pulses on the positive and negative loads will be tested respectively, and the difference between the positive pulse formation time and the negative pulse formation time will be calculated.

[0042] Step 6: Adjust the air pressure of the positive and negative primary compression switches to adjust their on-time. This, in turn, adjusts the positive and negative voltage pulse formation times applied to the positive and negative loads, respectively. Return to step 3 until the difference between the positive and negative pulse formation times is within a preset range, thus completing the pulse timing control.

[0043] Furthermore, step 2 also includes: charging the positive polarity secondary compression switch and the negative polarity secondary compression switch with air to the working air pressure;

[0044] Step 5 specifically involves the following steps: When the voltages of the positive and negative primary energy storage capacitors reach the switching thresholds of the positive and negative primary compression switches, respectively, or when the positive and negative primary compression switches receive a trigger control signal from the main control unit, both the positive and negative primary compression switches are turned on, and the positive and negative secondary energy storage capacitors are charged. When the voltages of the positive and negative secondary energy storage capacitors reach the switching thresholds of the positive and negative secondary compression switches, respectively, both the positive and negative secondary compression switches are turned on. Then, the positive and negative loads receive positive and negative voltage pulses, respectively. The positive and negative pulses on the positive and negative loads are tested separately, and the difference between the positive and negative pulse formation times is calculated.

[0045] Further, step 1 specifically involves connecting the positive and negative loads to the aforementioned low-jitter high-voltage bipolar pulse source, demagnetizing the pulse transformer, and connecting the two differential voltage probes of the test unit to the voltage measurement ports of the positive and negative loads, respectively.

[0046] In step 5, the positive and negative pulse waveforms on the positive and negative loads are obtained by testing with the oscilloscope of the test unit, and the time difference between the positive pulse formation time and the negative pulse formation time is calculated based on the two pulse waveforms.

[0047] Further, step 4 specifically involves controlling the pseudo-spark switch to turn on through the main control unit, causing the primary energy storage capacitor to discharge to the primary winding of the pulse transformer, and the secondary winding of the pulse transformer to momentarily induce voltage and simultaneously charge the positive and negative primary energy storage capacitors.

[0048] The beneficial effects of this invention are:

[0049] 1. The present invention provides a low-jitter high-voltage bipolar pulse source and a pulse timing control method. It utilizes the inherent electromagnetic coupling relationship between the primary and secondary windings of a pulse transformer to synchronously generate two high-voltage pulses with symmetrical amplitudes and opposite polarities, which are applied to the positive and negative polarity loads. By changing the working gas pressure of the switch to finely adjust the switch conduction time, the time when the positive and negative polarity loads receive the pulse voltage is controlled, thereby improving the accuracy of pulse timing control. This design avoids the synchronization error caused by the dispersion of switch breakdown delay when using two independent pulse sources.

[0050] 2. The present invention provides a low-jitter, high-voltage bipolar pulse source and a pulse timing control method. In the primary circuit, a pseudo-spark switch is selected as the conducting device. With its high voltage, large current and low jitter characteristics, it can effectively reduce the overall jitter of the system while obtaining high-amplitude fast-leading electrical pulses, thereby improving the time synchronization characteristics between the bipolar pulse source and other external devices or measurement and diagnostic systems.

[0051] 3. The present invention provides a low-jitter, high-voltage bipolar pulse source and a pulse timing control method. It adopts a two-stage compression circuit to achieve efficient generation of high-voltage, fast-leading pulses. It can also control the time difference between the positive pulse formation time of the positive polarity load and the negative pulse formation time applied to the negative polarity load to the nanosecond level, which greatly improves the timing control accuracy and control flexibility, thereby meeting the strict requirements of different application scenarios for pulse waveform and timing control. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of an embodiment of a low-jitter, high-voltage bipolar pulse source according to the present invention;

[0053] Figure 2 This is a schematic diagram of the measurement unit in an embodiment of the present invention;

[0054] Figure 3 This is a schematic diagram of the structure of the main control unit in an embodiment of the present invention.

[0055] The attached figures are labeled as follows:

[0056] 1. Pseudo-spark switch; 2. Primary energy storage capacitor; 3. Primary-side equivalent resistance; 4. Primary-side equivalent inductance; 5. Pulse transformer; 6. Secondary-side positive equivalent resistance; 7. Secondary-side positive equivalent inductance; 8. Secondary-side negative equivalent resistance; 9. Secondary-side negative equivalent inductance; 10. Positive-polarity primary energy storage capacitor; 11. Negative-polarity primary energy storage capacitor; 12. Positive-polarity primary compression switch; 13. Positive-polarity primary compression equivalent resistance; 14. Positive-polarity primary compression equivalent inductance; 15. Negative-polarity primary compression switch; 16. Negative-polarity primary compression equivalent resistance; 17. Negative-polarity primary compression equivalent inductance. 18. Positive polarity secondary energy storage capacitor; 19. Negative polarity secondary energy storage capacitor; 20. Positive polarity secondary compression switch; 21. Positive polarity secondary compression equivalent resistance; 22. Positive polarity secondary compression equivalent inductance; 23. Negative polarity secondary compression switch; 24. Negative polarity secondary compression equivalent resistance; 25. Negative polarity secondary compression equivalent inductance; 26. Positive polarity load; 27. Negative polarity load; 28. Main control unit; 29. ​​First control terminal; 30. Second control terminal; 31. Third control terminal; 32. Differential voltage probe; 33. Resistive voltage divider; 34. Oscilloscope. Detailed Implementation

[0057] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] This invention provides a low-jitter, high-voltage bipolar pulse source that acts on a positive polarity load 26 and a negative polarity load 27, such as... Figure 1As shown, the bipolar pulse source includes a pseudo-spark switch 1, a primary energy storage capacitor 2, a pulse transformer 5, an energy storage and discharge unit, a measurement unit, and a total control unit 28. The energy storage and discharge unit includes a positive primary energy storage capacitor 10, a negative primary energy storage capacitor 11, a positive primary compression switch 12, a negative primary compression switch 15, a positive secondary energy storage capacitor 18, a negative secondary energy storage capacitor 19, a positive secondary compression switch 20, and a negative secondary compression switch 23. In this embodiment, the operating voltage range of the pseudo-spark switch 1 is 40 kV - 60 kV, the operating voltage of the primary energy storage capacitor 2 is 60 kV, the ratio of the number of turns in the primary coil to the number of turns in the secondary coil of the pulse transformer 5 is 1:10, the nominal capacitance values ​​of the positive primary energy storage capacitor 10 and the negative primary energy storage capacitor 11 are both 270 pF, and the nominal capacitance values ​​of the positive secondary energy storage capacitor 18 and the negative secondary energy storage capacitor 19 are both 180 pF.

[0059] One end of the pseudo-spark switch 1 is connected to one end of the primary energy storage capacitor 2, and the other end is grounded;

[0060] The other end of the primary energy storage capacitor 2 is connected to one end of the primary winding of the pulse transformer 5;

[0061] The other end of the primary winding of the pulse transformer 5 is connected to the other end of the pseudo-spark switch 1, one end of the secondary winding is connected to one end of the positive polarity primary energy storage capacitor 10, and the other end of the secondary winding is connected to one end of the negative polarity primary energy storage capacitor 11. The center tap of the pulse transformer 5 is grounded, thereby generating positive and negative bipolar outputs respectively.

[0062] The other end of the positive polarity primary energy storage capacitor 10 is connected to the center tap of the secondary winding of the pulse transformer 5.

[0063] The other end of the negative polarity primary energy storage capacitor 11 is connected to the center tap of the pulse transformer 5;

[0064] One end of the positive polarity primary compression switch 12 is connected to one end of the positive polarity primary energy storage capacitor 10, and the other end is connected to one end of the positive polarity secondary energy storage capacitor 18.

[0065] One end of the negative polarity primary compression switch 15 is connected to one end of the negative polarity primary energy storage capacitor 11, and the other end is connected to one end of the negative polarity secondary energy storage capacitor 19.

[0066] The other end of the positive polarity secondary energy storage capacitor 18 is connected to the center tap of the pulse transformer 5;

[0067] The other end of the negative polarity secondary energy storage capacitor 19 is connected to the center tap of the pulse transformer 5;

[0068] One end of the positive polarity secondary compression switch 20 is connected to one end of the positive polarity secondary energy storage capacitor 18, and the other end is connected to one end of the positive polarity load 26 as the output positive terminal of the energy storage discharge unit; the other end of the positive polarity load 26 is connected to the center tap of the secondary winding of the pulse transformer 5.

[0069] One end of the negative polarity secondary compression switch 23 is connected to one end of the negative polarity secondary energy storage capacitor 19, and the other end serves as the output negative terminal of the energy storage discharge unit, connected to one end of the negative polarity load 27; the other end of the negative polarity load 27 is connected to the center tap of the pulse transformer 5.

[0070] like Figure 2 As shown, the measurement unit includes a resistor voltage divider 33, two differential voltage probes 32 connected to the two input terminals of the resistor voltage divider 33 respectively, and an oscilloscope 34 connected to the output terminal of the resistor voltage divider 33. The two differential voltage probes 32 are used to measure the voltage of the positive polarity load 26 and the negative polarity load 27 respectively, and the corresponding pulse waveforms are displayed by the oscilloscope 34.

[0071] Combination Figure 3 and Figure 1 As shown, the first control terminal 29, the second control terminal 30, and the third control terminal 31 of the main control unit 28 are electrically connected to the dummy spark switch 1, the positive polarity primary compression switch 12, and the negative polarity primary compression switch 15, respectively. The conduction of the positive polarity primary compression switch 12 and the negative polarity primary compression switch 15 can be controlled by air pressure or by the main control unit 28.

[0072] Figure 1 In the diagram, the equivalent resistances are: primary side 3, secondary side positive terminal 6, secondary side negative terminal 8, positive first-stage compression equivalent resistance 13, negative first-stage compression equivalent resistance 16, positive second-stage compression equivalent resistance 21, and negative second-stage compression equivalent resistance 24. The equivalent inductances are: primary side 4, secondary side positive terminal 7, secondary side negative terminal 9, positive first-stage compression equivalent inductance 14, negative first-stage compression equivalent inductance 17, positive second-stage compression equivalent inductance 22, and negative second-stage compression equivalent inductance 25.

[0073] The pulse timing control using the aforementioned low-jitter, high-voltage bipolar pulse source specifically includes the following steps:

[0074] Step 1: Connect the positive load 26 and the negative load 27 to the low-jitter high-voltage bipolar pulse source mentioned above, demagnetize the pulse transformer 5, and connect the two differential voltage probes 32 of the test unit to the voltage measurement ports of the positive load 26 and the negative load 27, respectively.

[0075] Step 2: Inflate the pseudo-spark switch 1, positive polarity primary compression switch 12, negative polarity primary compression switch 15, positive polarity secondary compression switch 20, and negative polarity secondary compression switch 23 to the working pressure;

[0076] Step 3: Charge the primary energy storage capacitor 2 to the operating voltage;

[0077] Step 4: Control the pseudo-spark switch 1 to turn on through the main control unit 28. The primary energy storage capacitor 2 discharges to the primary winding of the pulse transformer 5. The secondary winding of the pulse transformer 5 is momentarily induced by voltage and simultaneously charges the positive primary energy storage capacitor 10 and the negative primary energy storage capacitor 11.

[0078] Step 5: When the voltages of the positive primary energy storage capacitor 10 and the negative primary energy storage capacitor 11 reach the switching thresholds of the positive primary compression switch 12 and the negative primary compression switch 15, respectively, or when the positive primary compression switch 12 and the negative primary compression switch 15 receive a trigger control signal from the main control unit 28, both the positive primary compression switch 12 and the negative primary compression switch 15 are turned on, and the positive secondary energy storage capacitor 18 and the negative secondary energy storage capacitor 19 are charged. When the voltage of 9 reaches the switching threshold of the positive polarity secondary compression switch 20 and the negative polarity secondary compression switch 23 respectively, both the positive polarity secondary compression switch 20 and the negative polarity secondary compression switch 23 are turned on. Then the first load 26 and the negative polarity load 27 receive positive voltage pulses and negative voltage pulses respectively. The positive and negative pulses on the positive polarity load 26 and the negative polarity load 27 are tested by the oscilloscope 34 of the test unit respectively. The time difference between the positive pulse formation time and the negative pulse formation time is calculated based on the two pulse waveforms.

[0079] During this process, the positive and negative bipolar pulses output by the pulse transformer 5 are transmitted to the positive primary energy storage capacitor 10 and the negative primary energy storage capacitor 11. The primary pulse is compressed for the first time through the positive primary compression switch 12 and the negative primary compression switch 15. The compressed pulse energy continues to be transmitted.

[0080] Step 6: Adjust the air pressure of the positive polarity primary compression switch 12 and the negative polarity primary compression switch 15 to adjust the conduction time of the positive polarity primary compression switch 12 and the negative polarity primary compression switch 15. This, in turn, adjusts the positive polarity voltage pulse and the negative polarity voltage pulse applied to the positive polarity load 26 and the negative polarity load 27, respectively. Calculate the time difference between the positive polarity pulse formation time and the negative polarity pulse formation time using the two pulse waveforms on the oscilloscope 34. Return to step 3 until the difference between the positive polarity pulse formation time and the negative polarity pulse formation time is within the preset range, thus completing the pulse timing control.

[0081] During this process, the pulse energy compressed by the positive polarity primary compression switch 12 and the negative polarity primary compression switch 15 continues to be transferred to the positive polarity secondary energy storage capacitor 18 and the negative polarity secondary energy storage capacitor 19, and completes the second compression through the positive polarity secondary compression switch 20 and the negative polarity secondary compression switch 23. Finally, on the positive polarity load 26 and the negative polarity load 27, the amplitude is about twice that of the unipolar pulse.

[0082] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present invention should be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A low-jitter, high-voltage bipolar pulse source for connecting a positive polarity load (26) and a negative polarity load (27), characterized in that: It includes a pseudo-spark switch (1), a primary energy storage capacitor (2), a pulse transformer (5), and an energy storage discharge unit; the energy storage discharge unit includes a positive polarity primary energy storage capacitor (10), a negative polarity primary energy storage capacitor (11), a positive polarity primary compression switch (12), and a negative polarity primary compression switch (15). One end of the pseudo-spark switch (1) is connected to one end of the primary energy storage capacitor (2), and the other end is grounded; The other end of the primary energy storage capacitor (2) is connected to one end of the primary winding of the pulse transformer (5); The other end of the primary winding of the pulse transformer (5) is grounded, one end of the secondary winding is connected to one end of the positive polarity primary energy storage capacitor (10), and the other end of the secondary winding is connected to one end of the negative polarity primary energy storage capacitor (11). The center tap of the secondary winding of the pulse transformer (5), the other end of the positive polarity primary energy storage capacitor (10) and the other end of the negative polarity primary energy storage capacitor (11) are all grounded. One end of the positive polarity primary compression switch (12) is connected to one end of the positive polarity primary energy storage capacitor (10), and the other end serves as the output positive terminal of the energy storage discharge unit, used to connect to the positive polarity load (26). One end of the negative polarity primary compression switch (15) is connected to one end of the negative polarity primary energy storage capacitor (11), and the other end serves as the output negative terminal of the energy storage discharge unit, used to connect the negative polarity load (27).

2. The low-jitter high-voltage bipolar pulse source according to claim 1, characterized in that: The energy storage and discharge unit also includes a positive polarity secondary energy storage capacitor (18), a negative polarity secondary energy storage capacitor (19), a positive polarity secondary compression switch (20), and a negative polarity secondary compression switch (23). One end of the positive polarity secondary energy storage capacitor (18) is connected to the other end of the positive polarity primary compression switch (12), and the other end is grounded; One end of the negative polarity secondary energy storage capacitor (19) is connected to the other end of the negative polarity primary compression switch (15), and the other end is grounded; One end of the positive polarity secondary compression switch (20) is connected to one end of the positive polarity secondary energy storage capacitor (18); One end of the negative polarity secondary compression switch (23) is connected to one end of the negative polarity secondary energy storage capacitor (19); The other end of the positive polarity secondary compression switch (20) serves as the output positive terminal of the energy storage discharge unit and is used to connect to the positive polarity load (26). The other end of the negative polarity secondary compression switch (23) serves as the output negative terminal of the energy storage discharge unit and is used to connect to the negative polarity load (27).

3. The low-jitter high-voltage bipolar pulse source according to claim 1 or 2, characterized in that: It also includes a measurement unit; The measurement unit includes a resistor voltage divider (33), two differential voltage probes (32) connected to the two input terminals of the resistor voltage divider (33) respectively, and an oscilloscope (34) connected to the output terminal of the resistor voltage divider (33). Two differential voltage probes (32) are used to connect to the voltage measurement ports of the positive load (26) and the negative load (27) respectively to measure the voltage of the positive load (26) and the negative load (27) and display the corresponding pulse waveforms on an oscilloscope (34).

4. The low-jitter high-voltage bipolar pulse source according to claim 1, characterized in that: It also includes the main control unit (28); The main control unit (28) is electrically connected to the pseudo-spark switch (1), the positive polarity primary compression switch (12), and the negative polarity primary compression switch (15), respectively.

5. The low-jitter high-voltage bipolar pulse source according to claim 2, characterized in that: The working voltage range of the pseudo-spark switch (1) is 40 kV - 60 kV; The operating voltage range of the primary energy storage capacitor (2) is 50 kV - 70 kV; The ratio of the number of turns in the primary coil to the number of turns in the secondary coil of the pulse transformer (5) ranges from 1:12 to 1:

8. The nominal capacitance values ​​of the positive polarity primary energy storage capacitor (10) and the negative polarity primary energy storage capacitor (11) are both in the range of 220pF-320pF. The nominal capacitance values ​​of the positive polarity secondary energy storage capacitor (18) and the negative polarity secondary energy storage capacitor (19) are both in the range of 130pF-230pF.

6. The low-jitter high-voltage bipolar pulse source according to claim 5, characterized in that: The operating voltage of the primary energy storage capacitor (2) is 60 kV; The ratio of the number of turns in the primary coil to the number of turns in the secondary coil of the pulse transformer (5) is 1:10; The nominal capacitance values ​​of the positive polarity primary energy storage capacitor (10) and the negative polarity primary energy storage capacitor (11) are both 270 pF. The nominal capacitance values ​​of the positive polarity secondary energy storage capacitor (18) and the negative polarity secondary energy storage capacitor (19) are both 180 pF.

7. A pulse timing control method, based on the low-jitter high-voltage bipolar pulse source according to any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Connect the positive polarity load (26) and the negative polarity load (27) to the low jitter high voltage bipolar pulse source according to any one of claims 1-6, and demagnetize the pulse transformer (5); Step 2: Inflate the pseudo-spark switch (1), the positive polarity primary compression switch (12), and the negative polarity primary compression switch (15) to the working pressure; Step 3: Charge the primary energy storage capacitor (2) to the operating voltage; Step 4: Turn on the pseudo-spark switch (1), the primary energy storage capacitor (2) discharges to the primary winding of the pulse transformer (5), the secondary winding of the pulse transformer (5) is momentarily induced by voltage and simultaneously charges the positive primary energy storage capacitor (10) and the negative primary energy storage capacitor (11). Step 5: When the voltages of the positive first-stage energy storage capacitor (10) and the negative first-stage energy storage capacitor (11) reach the switching thresholds of the positive first-stage compression switch (12) and the negative first-stage compression switch (15), both the positive first-stage compression switch (12) and the negative first-stage compression switch (15) are turned on. Then the positive load (26) and the negative load (27) receive positive voltage pulses and negative voltage pulses, respectively. The positive pulses and negative pulses on the positive load (26) and the negative load (27) are tested, and the difference between the positive pulse formation time and the negative pulse formation time is calculated. Step 6: Adjust the air pressure of the positive polarity primary compression switch (12) and the negative polarity primary compression switch (15) to adjust the conduction time of the positive polarity primary compression switch (12) and the negative polarity primary compression switch (15), and then adjust the positive polarity voltage pulse and the negative polarity voltage pulse applied to the positive polarity load (26) and the negative polarity load (27) respectively. Return to step 3 until the difference between the positive polarity pulse formation time and the negative polarity pulse formation time is within the preset range, then the pulse timing control is completed.

8. The pulse timing control method according to claim 7, characterized in that: Step 2 also includes: charging the positive polarity secondary compression switch (20) and the negative polarity secondary compression switch (23) to the working pressure; Step 5 specifically involves the following steps: When the voltages of the positive primary energy storage capacitor (10) and the negative primary energy storage capacitor (11) reach the switching thresholds of the positive primary compression switch (12) and the negative primary compression switch (15), respectively, or when the positive primary compression switch (12) and the negative primary compression switch (15) receive a trigger control signal from the main control unit (28), both the positive primary compression switch (12) and the negative primary compression switch (15) are turned on, and the positive secondary energy storage capacitor (18) and the negative secondary energy storage capacitor (19) are charged. When the voltages of (18) and the negative polarity secondary energy storage capacitor (19) reach the switching thresholds of the positive polarity secondary compression switch (20) and the negative polarity secondary compression switch (23), respectively, both the positive polarity secondary compression switch (20) and the negative polarity secondary compression switch (23) will be turned on. Then the positive polarity load (26) and the negative polarity load (27) will receive positive polarity voltage pulses and negative polarity voltage pulses, respectively. The positive polarity pulses and negative polarity pulses on the positive polarity load (26) and the negative polarity load (27) will be tested, and the difference between the positive polarity pulse formation time and the negative polarity pulse formation time will be calculated.

9. The pulse timing control method according to claim 8, characterized in that: Step 1 specifically involves connecting the positive polarity load (26) and the negative polarity load (27) to the low-jitter high-voltage bipolar pulse source described in any of claims 1-6, demagnetizing the pulse transformer (5), and connecting the two differential voltage probes (32) of the test unit to the voltage measurement ports of the positive polarity load (26) and the negative polarity load (27), respectively. In step 5, the positive and negative pulse waveforms on the positive load (26) and the negative load (27) are obtained by testing the oscilloscope (34) of the test unit, and the time difference between the positive pulse formation time and the negative pulse formation time is calculated based on the two pulse waveforms.

10. The pulse timing control method according to claim 9, characterized in that: Step 4 specifically involves controlling the pseudo-spark switch (1) to turn on via the main control unit (28), discharging the primary energy storage capacitor (2) to the primary winding of the pulse transformer (5), and the secondary winding of the pulse transformer (5) momentarily inducing voltage and simultaneously charging the positive primary energy storage capacitor (10) and the negative primary energy storage capacitor (11).

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