Synchronous timing control system for strong laser plasma interaction experiment

Abstract

A kind of synchronous timing control system for strong laser plasma interaction experiment, including a femtosecond laser device, a square wave signal generator, a jet signal synchronizer, three delay timers, a 12-way signal synchronizer, two shutter controllers, a YAG laser, a jet controller, multiple experimental acquisition instruments including an electron spectrometer, a rear imaging CCD, a spectrometer CCD.The present application is mainly applied to the field of strong laser plasma interaction, which can accurately control the interaction time of femtosecond laser pulse and nanosecond gate plasma channel, and accurately control the start acquisition time and acquisition duration of various experimental data, improve the signal-to-noise ratio, and the whole timing system is very easy to adjust.The present application also has strong expansibility, when ionized gas is not needed to form plasma channel, the 1Hz pulse signal timing of the right half of the dashed line can be removed, so that the interaction time of femtosecond laser pulse and millisecond gate jet gas can be accurately controlled.The expansibility of the present application is also reflected in that enough output ports have been reserved, and suitable functional elements can be connected subsequently.

Description

Technical Field

[0001] This invention relates to the field of electronic synchronous timing control technology, and is a synchronous timing control system for laser-plasma interaction experiments. Background Technology

[0002] With the rapid development of laser-plasma interaction, particularly in the field of high-energy electron beam generation based on wakefield acceleration, scientists can now obtain electron beams with excellent individual qualities in the laboratory, such as high energy, low energy dissipation, high flux, and low emittance. Achieving these cutting-edge results requires not only a suitable gas target structure and a high-quality femtosecond laser, but also a highly precise electronic control system. This is because, to generate a high-quality electron beam, the relative delay between the femtosecond laser and the gas target needs to be synchronized and precisely controlled. Achieving these requirements necessitates a high-precision electronic control system, the accuracy of which directly affects the quality of the generated electron beam. Therefore, an electronic synchronization timing control system is extremely important for laser-plasma interaction experiments, and the pursuit of such a high-precision, easily adjustable electronic control system is of great value.

[0003] The pulse width of a femtosecond laser is on the femtosecond scale, the duration of the plasma channel is on the hundreds of nanoseconds scale, and the width of the jet gate is on the millisecond scale. These timescales are extremely small. To achieve good experimental results, the femtosecond laser pulse must pass precisely through the hundreds of nanosecond window of the plasma channel or the millisecond window of the gas jet, and the relative delay must be precisely controlled. This places very high demands on the electronic synchronization timing control system. Currently, there are no products or patents of this type of electronic synchronization timing control system. This invention is designed specifically for this type of laser-plasma interaction experiment. Summary of the Invention

[0004] Since there are currently no patents specifically addressing the electronic control systems required for such large-scale, high-precision experiments, the purpose of this invention is to provide a scalable, easily adjustable, and high-precision electronic synchronization timing control system for experiments involving the interaction of a gas target and femtosecond laser pulses to generate a high-quality electron beam. This system can precisely control the interaction time between the femtosecond laser pulse and the nanosecond gate-wide plasma channel, as well as the start and duration of various experimental data acquisitions. Furthermore, the entire timing system is highly adjustable. This invention also has strong scalability; when ionized gas is not required to form a plasma channel, the 1Hz pulse signal timing in the right half of the dashed line can be removed, thus enabling precise control of the interaction time between the femtosecond laser pulse and the millisecond gate-wide jet gas.

[0005] To achieve the above objectives, this invention provides a synchronous timing control system for experiments involving high-power laser-plasma interaction, comprising:

[0006] A femtosecond laser device generates the ultra-intense, ultra-short femtosecond laser required for the experiment;

[0007] A square wave signal generator is used to generate two synchronous but different frequency total clock control signals;

[0008] Three delayers are used to generate signals with different timing sequences. The output signal of each delayer is continuously adjustable from 0 to 10 seconds relative to the input signal, with an adjustment accuracy of up to 1 fs. The gate width of the output signal of all output ports is continuously adjustable from 0 to 1 second.

[0009] A jet signal synchronizer is used to control the synchronization of the laser signal and the jet signal;

[0010] A 12-channel signal synchronizer is used to output 12 identical timing signals;

[0011] A femtosecond laser shutter controller and a YAG laser shutter controller, when receiving a 5V TTL level signal (rising edge valid), open the shutter to allow the femtosecond laser and YAG laser to pass through respectively;

[0012] A YAG laser, provided by a high-voltage discharge laser trigger switch (see patent number CN 106130532B for details) to activate the YAG laser;

[0013] A jet controller for controlling the opening width of the jet gas;

[0014] An electron spectrometer, a back-end imaging CCD, and a spectrometer CCD are used for experimental data acquisition, and the acquisition duration can be adjusted.

[0015] further:

[0016] The square wave signal generator continuously emits pulse signals in three ways: the first is a 0.1Hz pulse signal input to the trigger input of the femtosecond laser device, causing the femtosecond laser device to emit light at a frequency of 0.1Hz; the second is a 0.1Hz laser synchronization signal input to the jet signal synchronizer; and the third is a 1Hz pulse signal input to the first delay unit.

[0017] The pulse signal from the output port A1 of the first delayer is input to the Q-Switch trigger input of the YAG laser, and the pulse signal from the output port A2 is input to the Flash-Lamp trigger input of the YAG laser. By adjusting the delay of the pulse signal output from the output port A2 compared to the 1Hz pulse signal, the emission time of the YAG laser can be controlled, and the intensity of the YAG laser can be adjusted by adjusting the relative delay of the pulse signals output from ports A1 and A2.

[0018] The jet signal synchronizer receives a continuous 0.1Hz laser synchronization signal in 5V TTL mode, with the rising edge being valid. Simultaneously, three external push-button switches SW(1), SW(2), and SW(3) are connected to the product for inputting jet commands. When any push-button switch is pressed, a signal pulse is input from the button's output port to the input port of the jet signal synchronizer, which picks up a high-level signal. This is an AND gate logic circuit; when two high-level inputs are received, the synchronizer outputs a single 5V TTL pulse signal, which is input to the second delay circuit.

[0019] The output port B1 of the second delay unit outputs a signal pulse to the femtosecond laser shutter controller, which is valid on the rising edge, to control the opening time of the femtosecond laser shutter. The output port B2 outputs a signal pulse to the electron spectrometer trigger switch, which is valid on the rising edge, to control the start acquisition time of the electron spectrometer. The output port B3 outputs a signal pulse to the 12-channel signal synchronizer, which is valid on the rising edge. The output port B4 is reserved for backup.

[0020] The output port C1 of the 12-channel signal synchronizer outputs a signal pulse to the back-end imaging CCD trigger switch to control the start acquisition time of the back-end imaging CCD. The rising edge of the pulse signal input to the back-end imaging CCD trigger switch is valid. The output port C2 outputs a signal pulse to the spectrometer CCD trigger switch to control the start acquisition time of the spectrometer CCD. The rising edge of the pulse signal input to the spectrometer CCD trigger switch is valid. The output port C3 outputs a signal pulse to the third delay unit. The rising edge of the pulse signal input to the third delay unit is valid. The output port C4 outputs a signal pulse to the YAG laser shutter controller. The rising edge of the pulse signal input to the YAG laser shutter controller is valid. The remaining output ports are reserved for backup.

[0021] The pulse signal output by the third delay unit is input to the input terminal of the jet controller, and the delay and gate width of the output pulse signal can be adjusted. By adjusting the delay, the opening time of the jet controller can be controlled.

[0022] The gate width of the jet controller output signal is continuously adjustable from 0 to 1 second. When adjusted in conjunction with the third delay unit, the opening time, opening gate width, and jet mode (jet frequency) of the jet gas can be precisely controlled.

[0023] The trigger input terminal of the YAG laser shutter controller receives a pulse signal, and the rising edge is valid. This controls the opening time of the YAG laser shutter. The YAG laser shutter controller then controls the opening width of the shutter, so that the YAG laser passes through the shutter and hits the laser trigger switch (see patent number CN 106130532 B for details). The external high-voltage circuit is turned on, and the millisecond gate width jet gas is ionized to form a nanosecond gate width plasma channel.

[0024] The trigger input terminal of the femtosecond laser shutter controller receives a pulse signal, which is valid on the rising edge. It controls the opening time of the femtosecond laser shutter and then controls the opening width of the shutter through the femtosecond laser shutter controller, so that the femtosecond laser passes through the shutter and hits the target, interacting with the nanosecond gate width plasma channel (millisecond gate width jet gas).

[0025] The electron spectrometer described above has a CCD-type imaging CCD and a spectrometer CCD, both of which are CCD-type experimental data acquisition instruments and can independently control the exposure time.

[0026] further:

[0027] All of the pulse signals mentioned are valid only on the rising edge;

[0028] The existence gate width of the plasma channel is greater than 100 ns;

[0029] The gate width of the jet gas is greater than 1 ms;

[0030] The precise control of the interaction time between the femtosecond laser pulse and the nanosecond gate-wide plasma channel is achieved by adjusting the relative delay of the pulse signal output from output port A2 compared to the 1Hz pulse signal, so that the femtosecond laser pulse can be within the nanosecond gate-wide plasma channel.

[0031] The precise control of the interaction time between the femtosecond laser pulse and the millisecond gate width jet gas is achieved by adjusting the relative delay of the output pulse signal of the third delayer compared to the input signal.

[0032] further:

[0033] The timing control system described is scalable. This system can not only precisely control the interaction time between femtosecond laser pulses and nanosecond gate-wide plasma channels, but also precisely control the interaction time between femtosecond laser pulses and millisecond gate-wide jet gas. The system principle is shown in the left half of the dotted line in the figure.

[0034] The system's scalability is also reflected in the fact that it has many spare output ports on the three delayers and 12 signal synchronizers, and the delay and gate width of each port are individually adjustable.

[0035] further:

[0036] The light intensity and output delay of the YAG laser are adjustable, and it outputs light at a frequency of 1Hz.

[0037] The YAG laser that triggers the high-voltage discharge laser trigger switch consists of a YAG laser and a shutter. The YAG laser emits light continuously, which can maximize the stability of the light intensity of the YAG laser hitting the high-voltage discharge laser trigger switch.

[0038] The beneficial effects of this invention in high-intensity laser-plasma interaction experiments are as follows:

[0039] This invention not only precisely controls the interaction time between femtosecond laser pulses and nanosecond gated plasma channels, as well as the start and duration of various experimental data acquisitions, but also makes the entire timing system highly adjustable. Furthermore, this invention is highly scalable; when ionized gas is not required to form a plasma channel, the 1Hz pulse signal timing in the right half of the dashed line can be removed, thus enabling precise control of the interaction time between the femtosecond laser pulse and the millisecond gated jet gas. The scalability of this invention is also reflected in the provision of sufficient delay ports, allowing for the subsequent connection of necessary measurement instruments. Moreover, this invention has played a significant role in high-power laser guidance experiments and high-quality electron beam generation experiments. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the synchronous timing control system for high-power laser-plasma interaction experiments according to the present invention.

[0041] Figure 2 This is the overall timing diagram of the synchronous timing control system for high-power laser-plasma interaction experiments according to the present invention.

[0042] Figure 3 This is a schematic diagram of the signal port connections in the synchronous timing control system for high-power laser-plasma interaction experiments of the present invention.

[0043] Figure 4 The diagram shows the synchronous and non-synchronous pulse relationship of the square wave signal generator in the synchronous timing control system for high-intensity laser-plasma interaction experiments of this invention.

[0044] Figure 5 This is a timing relationship diagram between the 1Hz pulse signal and the 1Hz YAG laser signal in the synchronous timing control system for high-power laser-plasma interaction experiments of this invention.

[0045] Figure 6 This is a timing diagram of the NCLF-1 jet signal synchronizer in the synchronous timing control system for high-intensity laser-plasma interaction experiments of this invention.

[0046] Figure 7 This is a timing diagram showing the interaction between femtosecond laser pulses and nanosecond gate-wide plasma channels in the synchronous timing control system for high-power laser-plasma interaction experiments according to the present invention.

[0047] Figure 8 This is a time-series diagram showing the interaction between femtosecond laser pulses and millisecond gate-width jet gas in the synchronous timing control system for high-power laser-plasma interaction experiments according to the present invention. Detailed Implementation

[0048] The present invention will be further described below with reference to Embodiment 1, Embodiment 2 and the accompanying drawings, but this should not be construed as limiting the scope of protection of the present invention.

[0049] Example 1:

[0050] like Figures 1 to 8 As shown, this invention provides a synchronous timing control system for high-power laser-plasma interaction experiments to precisely control the interaction time between femtosecond laser pulses and nanosecond-gate wide plasma channels, as well as to precisely control the start time and duration of various experimental data acquisitions. It is highly adjustable and plays a crucial role in high-power laser guidance experiments. The structure of the electronic synchronous timing control system in this embodiment includes:

[0051] A PW-level femtosecond laser device, relying on the Shanghai Ultra-Intense and Ultra-Short Laser Laboratory, generates the ultra-intense and ultra-short laser required for the experiment.

[0052] A square wave signal generator is used to generate two synchronous but different frequency total clock control signals;

[0053] One DG535 delay and two DG645 delays output timing signals with different delays and gate widths;

[0054] An NCLF-1 jet signal synchronizer is used to control the synchronization of the femtosecond laser signal with the jet signal;

[0055] A 12-channel signal synchronizer is used to output 12 identical timing signals;

[0056] A femtosecond laser shutter controller and a YAG laser shutter controller, when receiving a 5V TTL level signal (rising edge valid), open the shutter to allow the femtosecond laser and YAG laser to pass through respectively;

[0057] A YAG laser provides a YAG laser that is turned on by triggering a high-voltage discharge laser trigger switch (see patent number CN 106130532B for details);

[0058] A Parker jet controller for controlling the gate width of the jet gas;

[0059] An electron spectrometer, a back-end imaging CCD, and a spectrometer CCD are used for experimental data acquisition, and the acquisition duration can be adjusted.

[0060] The timing relationships of each component are shown in the figure. Figure 2 Configure each signal port in the system according to Figure 3 The connection method is shown below, and the specific connection method is as follows (all ports are BNC (Bayonet NeillConcelman, coaxial cable interface) interfaces):

[0061] The continuously emitted pulse signal from the square wave signal generator is divided into three paths. The first path outputs a 0.1Hz pulse signal from output port 1 and inputs it to the trigger input 6 of the PW femtosecond laser device, controlling the PW-level femtosecond laser device to emit light at a frequency of 0.1Hz. The second path outputs a 0.1Hz pulse signal from output port 1 as a laser synchronization signal and inputs it to the trigger input 7 of the NCLF-1 jet signal synchronizer. The third path outputs a 1Hz pulse signal from output port 2 and inputs it to the trigger input 3 of the DG645 (No. 1). The 1Hz and 0.1Hz pulse signals are as follows: Figure 4 As shown;

[0062] DG645 1 receives a pulse signal from output port 2, with the rising edge being valid. Output port 4 outputs a pulse signal with a delay of td7 compared to the input signal. ① This pulse signal is input to the Flash-Lamp trigger input 12 of the YAG laser, where td7 + td2 = 100ms. Figure 5 As shown, output port 5 outputs a pulse signal ② with a delay of td8 compared to pulse signal ①, which is input to the Q-Switch trigger input terminal (13) of the YAG laser. By adjusting the delay td7, the output time of the YAG laser relative to the femtosecond laser device can be controlled, and the intensity of the YAG laser can be adjusted by adjusting the relative delay td8 of pulse signals ① and ②. The adjustment range of td8 is from 260us to 780us.

[0063] The NCLF-1 jet signal synchronizer is an AND gate logic circuit. When two high-level inputs are received, the synchronizer will output a single pulse signal of 5V TTL level. A 0.1Hz laser synchronization signal is continuously input to the jet signal synchronizer from the output port 1 of the square wave signal generator. The signal is in the form of 5V TTL level and the rising edge is valid. At the same time, three external key switches SW(1), SW(2), and SW(3) are connected to the product to input the jet command to the input ports 8, 9, and 10 of the synchronizer. Since the input ports 8, 9, and 10 are equivalent, when any key switch SW(i) is pressed, the output port (39) of the key will input a signal pulse to the input port 8 of the jet signal synchronizer. The synchronizer will pick up a high-level signal. After the laser synchronization signal arrives, due to the circuit response delay, the synchronizer will output a single pulse signal of 5V TTL level from the output port 11 to the trigger input port 14 of the DG535 delay after a delay of td1. The timing relationship is as follows. Figure 6As shown.

[0064] The DG535 delayer's trigger input 14 receives the pulse signal from output port 11, with the rising edge being valid. Output port 15 outputs a pulse signal delayed by td6 from the input pulse, which is input to the femtosecond laser shutter controller; output port 16 outputs a pulse signal delayed by td9 from the input pulse, which is input to the electron spectrometer trigger switch 33 to control the start acquisition time of the electron spectrometer, with the rising edge of the pulse signal input to the electron spectrometer trigger switch being valid; output port 18 outputs a pulse signal delayed by td5 from the input pulse, which is input to a 12-channel signal synchronizer, with the rising edge of the pulse signal input to the 12-channel signal synchronizer being valid; output port 17 is reserved for backup.

[0065] The trigger input 19 of the 12-channel signal synchronizer receives the pulse signal from the output port 18. The rising edge is valid, generating 12 identical pulse signals at output ports 20…31. Output port 20 outputs a pulse signal to the back-end imaging CCD trigger switch 33, which is also valid on the rising edge, controlling the start acquisition time of the back-end imaging CCD. Output port 21 outputs a pulse signal to the spectrometer CCD trigger switch 34, which is also valid on the rising edge, controlling the start acquisition time of the spectrometer CCD. Output port 22 outputs a pulse signal to the trigger input 36 of the second DG645 delay unit, which is also valid on the rising edge. Output port 23 outputs a pulse signal to the trigger input 38 of the YAG laser shutter controller, which is also valid on the rising edge, controlling the start time of the fast YAG laser shutter trigger. The remaining ports are reserved for future use.

[0066] The trigger input terminal 36 of DG645A No. 2 receives the pulse signal from the output port 22. The rising edge is valid. The output port 37 outputs a pulse signal with a delay of td10 compared to the input pulse and inputs it to the trigger input terminal 40 of the Parker jet controller. By adjusting the delay td10 of the output pulse signal from the output port 37, the start time of the Parker jet controller can be controlled.

[0067] When the Parker jet controller trigger input 40 receives a pulse signal from output port 37, the rising edge is valid, and gas begins to be ejected at supersonic speed. The gas gate width of this jet is on the order of milliseconds. The Parker jet controller can control the gas gate width. By adjusting the delay of the output pulse signal from output port 37 and the gate width, the opening time, gate width, and jet pattern of the gas jet can be precisely controlled.

[0068] The YAG laser shutter controller's trigger input 38 receives a pulse signal from the output port 23. The rising edge is valid, controlling the opening time of the YAG laser shutter. By controlling the shutter's opening width, the YAG laser beam passes precisely through the shutter and strikes the high-voltage discharge laser trigger switch. This opens the switch, activating the external high-voltage circuit, ionizing the millisecond-gate-width jet gas, and forming a nanosecond-gate-width plasma channel.

[0069] The trigger input 32 of the femtosecond laser shutter controller receives a pulse signal from the output port 15. The rising edge is valid, controlling the opening time of the femtosecond laser shutter. By controlling the shutter's opening width through the femtosecond laser shutter controller, the femtosecond laser can pass through the shutter precisely and strike the target, interacting with the nanosecond-width plasma channel. For detailed timing relationships, see [link to relevant documentation]. Figure 7 .

[0070] Example 2:

[0071] The connection methods of each signal port and the timing relationships of each component are as described in Example 1. However, in this case, it is no longer necessary to form a plasma channel; it is only necessary to precisely control the interaction time between the femtosecond laser and the millisecond gate width jet gas. Therefore, it is not necessary to output a 1Hz pulse signal from output port 2 to the trigger input terminal 3 of DG645 No. 1. When the trigger input terminal 32 of the femtosecond laser shutter controller receives the pulse signal from output port 15, the rising edge is valid, controlling the opening time of the femtosecond laser shutter. By controlling the opening gate width of the shutter through the femtosecond laser shutter controller, the femtosecond laser can just pass through the shutter and hit the target, interacting with the millisecond gate width jet gas. For detailed timing relationships, see [link to example]. Figure 8 .

[0072] Experiments show that the synchronous timing control system of this invention, used in the field of high-power laser-plasma interaction experiments, provides a simple and effective method to precisely control the interaction time between femtosecond laser pulses and nanosecond-gate-wide plasma channels (millisecond-gate-wide jet gas), as well as to precisely control the start time of experimental data acquisition. This improves the signal-to-noise ratio, is easy to operate, and has made a significant contribution to high-power laser guidance experiments and high-quality electron beam generation experiments. Since a high-precision electron synchronous timing control system is an indispensable part of laser-plasma interaction experiments, this invention also serves as an important reference for the field of laser wakefield electron acceleration in China.

Claims

1. A synchronous timing control system for high-power laser-plasma interaction experiments, characterized in that... include: A femtosecond laser device generates the ultra-intense, ultra-short femtosecond laser required for the experiment; A square wave signal generator is used to generate two synchronous but different frequency total clock control signals; Three delay units are used to generate signals with different timing sequences; A jet signal synchronizer is used to control the synchronization of the laser signal and the jet signal; A 12-channel signal synchronizer is used to output 12 identical timing signals; A femtosecond laser shutter controller and a YAG laser shutter controller, when receiving a 5V TTL level signal, open the shutter to allow the femtosecond laser and YAG laser to pass through respectively; A YAG laser that provides a high-voltage discharge laser trigger switch to turn on the YAG laser; A jet controller for controlling the gate width of the jet gas; An electron spectrometer, a back-end imaging CCD, and a spectrometer CCD are used for experimental data acquisition and to control the acquisition duration. The square wave signal generator continuously emits pulse signals in three channels: the first channel is a 0.1Hz pulse signal input to the trigger input of the femtosecond laser device; the second channel is a 0.1Hz laser synchronization signal input to the jet signal synchronizer; and the third channel is a 1Hz pulse signal input to the first delay unit. The pulse signal from the output port A1 of the first delay is input to the Q-Switch trigger input of the YAG laser, and the pulse signal from the output port A2 is input to the Flash-Lamp trigger input of the YAG laser. When the jet signal synchronizer receives two high levels, it outputs a single pulse signal of 5V TTL level to the second delay unit. The output port B1 of the second delay unit outputs a signal pulse to the femtosecond laser shutter controller, with the rising edge being valid. The output port B2 of the second delay unit outputs a signal pulse to the electron spectrometer trigger switch, with the rising edge being valid. The output port B3 of the second delay unit outputs a signal pulse to the 12-channel signal synchronizer, with the rising edge being valid. The output port B4 is reserved for backup. The output port C1 of the 12-channel signal synchronizer outputs a signal pulse to the back-end imaging CCD trigger switch, which is valid on the rising edge; the output port C2 outputs a signal pulse to the spectrometer CCD trigger switch, which is valid on the rising edge; the output port C3 outputs a signal pulse to the third delay unit, which is valid on the rising edge; the output port C4 outputs a signal pulse to the YAG laser shutter controller, which is valid on the rising edge; the remaining output ports are reserved for backup. The pulse signal output by the third delay unit is sent to the input terminal of the jet controller; The trigger input terminal of the YAG laser shutter controller receives a pulse signal, and the rising edge is valid. This controls the opening time of the YAG laser shutter. The YAG laser shutter controller then controls the opening width of the shutter, so that the YAG laser passes through the shutter and hits the laser trigger switch, which turns on the external high-voltage circuit. The millisecond gate width jet gas is ionized, forming a nanosecond gate width plasma channel. The trigger input terminal of the femtosecond laser shutter controller receives a pulse signal, which is valid on the rising edge. It controls the opening time of the femtosecond laser shutter and then controls the opening width of the shutter through the femtosecond laser shutter controller, so that the femtosecond laser passes through the shutter and hits the target, interacting with the nanosecond gate-width plasma channel.

2. The synchronous timing control system for high-power laser-plasma interaction experiments according to claim 1, characterized in that: The femtosecond laser device has an emission frequency of 0.1 Hz; The square wave signal generator outputs signals with frequencies of 0.1 Hz and 1 Hz. The output signal of the delay unit is continuously adjustable from 0 to 10 seconds relative to the input signal, with an adjustment accuracy of up to 1 fs. The gate width of the output signal of all output ports is continuously adjustable from 0 to 1 second. The gate width of the jet controller output signal is continuously adjustable from 0 to 1 second. Combined with the third delay unit, it can precisely control the jet opening time, opening gate width, and jet flow mode.

3. The synchronous timing control system for high-power laser-plasma interaction experiments according to claim 1, characterized in that: The existence gate width of the plasma channel is greater than 100 ns; The system precisely controls the interaction time between the femtosecond laser pulse and the nanosecond gate-wide plasma channel by adjusting the relative delay of the pulse signal output from output port A2 compared to the 1Hz pulse signal. The system precisely controls the interaction time between the femtosecond laser pulse and the millisecond gate width jet gas by adjusting the relative delay of the output pulse signal of the third delayer compared to the input signal.

4. The synchronous timing control system for high-power laser-plasma interaction experiments according to claim 1, characterized in that: The light intensity and emission time of the YAG laser are adjustable; The adjustable range of the relative delay of the output pulse signals from the output ports A1 and A2 is from 260µs to 780µs. The YAG laser that triggers the high-voltage discharge laser trigger switch consists of a YAG laser and a shutter. The YAG laser emits light continuously at 1Hz, which can maximize the stability of the light intensity of the YAG laser hitting the high-voltage discharge laser trigger switch.

Images