High-energy, very short pulse width incandescent light source system based on argon

Abstract

The application discloses a high-energy extremely-short-pulse-width incandescent light source system based on argon, and relates to the field of air flow tests.The high-energy extremely-short-pulse-width incandescent light source system comprises a high-voltage electrode for performing arc flash when high voltage is applied, the high-voltage electrode comprises a high-voltage anode and a high-voltage cathode capable of performing arc flash when high voltage is applied, and the high-voltage anode and the high-voltage cathode have a predetermined distance; an argon supply device for supplying argon between the high-voltage anode and the high-voltage cathode; a light device and a condenser lens group oppositely arranged on both sides of the high-voltage electrode; a power supply for supplying power to a high-voltage energy storage device, wherein the high-voltage energy storage device is electrically connected with the high-voltage electrode; a control module for performing time sequence control on the high-voltage anode and the high-voltage cathode; and an input and output module connected with the control module and the power supply.The application uses argon instead of conventional air as an ionization medium in the high-voltage electrode, so that the extremely-short-pulse-width can be realized when arc flash occurs, and the electrode can be prevented from being oxidized and damaged.

Description

Technical Field

[0001] This invention relates to the field of airflow testing. More specifically, this invention relates to an argon-based high-energy, ultra-short pulse width incandescent light source system for displaying ultra-high-speed flow. Background Technology

[0002] Flow field visualization technology is one of the effective experimental techniques in experimental fluid mechanics and an important means of acquiring experimental data in airflow experiments, occupying a significant position in experimental technology. The primary flow field visualization method is the Z-shaped schlieren spectrometer. Most wind tunnels and other flow-related experimental equipment are equipped with schlieren spectrometers of different apertures. For example, the 200m free-flying ballistic target at the China Aerodynamics Research and Development Center is equipped with dozens of schlieren spectrometers ranging from 300mm to 500mm in aperture. The grayscale or color changes in the images obtained by the schlieren method can reflect the beam deflection caused by the beam passing through the flow field. It is generally sensitive to the first derivative of the flow field density gradient, thus the schlieren method has high sensitivity, and the wave system structure of the flow field can be quickly obtained through schlieren images.

[0003] For high-speed or ultra-high-speed flow fields, the effective exposure time of the schlieren image must be very short to avoid image blurring; otherwise, motion blur will appear in the flow field image. For example, when the flow field velocity is 2 km / s, if the effective exposure time is 1 µs, the actual movement distance of the flow field in the obtained schlieren image will be 2 mm, and the corresponding motion blur in the image will also reach 2 mm at an imaging ratio of 1:1. If the beam deflection caused by flow field disturbance is less than 1 mm, the obtained schlieren image cannot accurately reflect the actual flow field structure. To reduce the effective exposure time of schlieren images, two methods are commonly used. One method involves using a long-duration light source with a high-speed or ultra-high-speed camera to capture the schlieren image; the effective exposure time depends on the shutter speed of the high-speed or ultra-high-speed camera. The other method uses a waiting-time photography technique with a short-pulse light source. This means that the camera shutter is kept open throughout the experiment to prevent interference from external stray light, and a short-pulse light source flashes at a specific moment. The high-speed or ultra-high-speed flow field is frozen and recorded on the camera at this instant, and the effective exposure time depends on the pulse width of the short-pulse light source. The first method can obtain multiple images, but the image resolution is not very high. The second method can only obtain one image per experiment, but the image resolution is higher. Both methods are commonly used in practice.

[0004] In ballistic target tests, because multiple flow field display and measurement stations need to be deployed within a few hundred meters of the model's flight distance, the second method mentioned above is typically used to display the flow field structure around the model. Specifically, in ballistic target tests, a pulsed light source is needed to meet the requirements for displaying ultra-high-speed flow fields in "Z"-shaped schlieren, enabling instantaneous high-energy illumination of the target. Various types of pulsed light sources have been developed both domestically and internationally, including laser pulsed light sources, electron beam pulsed light sources, and needle pulsed light sources. Their applications are mainly in scientific research, medicine, and industrial production. However, the high-energy pulsed light sources suitable for flow field display are primarily laser pulsed light sources, pulsed xenon lamps, and electric spark light sources. This is because the pulse width of the pulsed light source must be sufficiently short, down to the millisecond or even microsecond level, to achieve instantaneous freezing of flow field phenomena. Due to the single wavelength of laser pulse sources, a series of interference fringes and diffraction ring noises are formed in the flow field image. Simultaneously, the laser beam introduces significant background noise into the flow field image. This noise severely affects the imaging resolution and the clarity of the flow field. To display weak information such as the boundary layer and shock wave separation distance around the model, a high-energy incandescent light source with extremely short pulse widths is needed to obtain a low-noise flow field image without obvious diffraction and interference fringes. Pulsed incandescent light sources are mainly pulsed xenon lamps and pulsed electric spark sources. However, because the pulse width of pulsed xenon lamps is difficult to reach the nanosecond level, they are unsuitable for direct use in high-velocity flow fields. Although high-voltage discharge can achieve incandescent light sources with shorter pulse widths, incandescent light sources using air as the ionization medium suffer from drawbacks such as unstable discharge positions and difficulty in achieving pulse widths of several hundred nanoseconds. Summary of the Invention

[0005] One object of the present invention is to solve at least the above-mentioned problems and / or defects, and to provide at least the advantages described below.

[0006] To achieve these objectives and other advantages of the present invention, a high-energy, ultra-short pulse width incandescent light source system based on argon gas is provided, comprising:

[0007] A high-voltage electrode that performs arc flashing when high voltage is applied, the high-voltage electrode comprising: a high-voltage anode and a high-voltage cathode capable of performing arc flashing when high voltage is applied, and a predetermined distance between the high-voltage anode and the high-voltage cathode;

[0008] An argon gas supply device that delivers argon gas between a high-pressure anode and a high-pressure cathode;

[0009] Optical focusing devices and condenser lens groups are arranged opposite each other on both sides of the high-voltage electrode;

[0010] A power source that supplies power to a high-voltage energy storage device, which is electrically connected to a high-voltage electrode;

[0011] A control module for timing control of the high-voltage anode and high-voltage cathode;

[0012] Input / output modules that are connected to the control module and power supply.

[0013] Preferably, the predetermined distance between the high-voltage anode and the high-voltage cathode can be adjusted as needed.

[0014] Preferably, the high-voltage anode comprises: an anode high-voltage column made of Invar steel;

[0015] Among them, a gas supply access pipe connected to an argon gas supply device is inserted along the length of the anode high-pressure column;

[0016] The high-pressure anode column has a through hole at the axial center of one end that mates with the high-pressure cathode, which is connected to a gas supply pipe to output argon gas to the high-pressure cathode side.

[0017] The end of the anode high-voltage column that mates with the high-voltage cathode is shaped like a ball.

[0018] Preferably, the high-voltage cathode comprises:

[0019] A grounding post made of Invar steel is provided with a fixed section of varying diameter at the end that mates with the high-voltage anode;

[0020] An insulating sleeve that is fitted onto the fixed section and has the same diameter as the larger side of the grounding post;

[0021] Install a negative high-voltage ring at the front end of the insulating isolation sleeve;

[0022] The negative high-voltage ring is configured as a ball-head shape.

[0023] Preferably, the light-gathering device includes:

[0024] A continuous light source that spatially coordinates with the arcing flash point of the high-voltage electrode;

[0025] Lens group I and lens group II are positioned between the continuous light source and the high-voltage electrode;

[0026] The continuous light source is adjusted up and down, left and right, and forward and backward in the direction relative to the optical axis by an adjustment mechanism.

[0027] Preferably, the continuous light source is a 3W white LED light source;

[0028] The aperture of both lens group I and lens group II is 20mm, and the focal length is 50mm.

[0029] The adjustment step of the adjustment mechanism is 0.01 mm.

[0030] Preferably, the high-voltage energy storage device is formed by connecting six 0.01uF high-voltage capacitors in parallel to achieve the requirement of 3J of electrical energy at the highest charging voltage of 10kV.

[0031] Preferably, it also includes:

[0032] An ellipsoidal reflector positioned on one side of the high-voltage electrode, spatially aligned with the arc flash point.

[0033] The present invention has at least the following beneficial effects:

[0034] Firstly, this invention uses a high-energy, extremely short-pulse incandescent light source in a conventional "Z"-shaped schlieren optical path to eliminate interference fringes and diffraction ring noise caused by using a laser light source, and avoid speckle noise of the laser beam, thereby improving the background uniformity of the flow field image.

[0035] Secondly, this invention uses argon gas as an ionization medium, which can achieve an extremely short pulse width during arc flashing, while avoiding electrode oxidation damage.

[0036] Third, both the anode and cathode of this invention adopt a spherical structure, which can effectively reduce the amount of flash drift;

[0037] Fourth, the present invention arranges ellipsoidal reflectors around the flash point of the light source. The reflectors reflect part of the light beam emitted by the flash point to the exit position, thereby improving the light beam collection efficiency of the light source focusing lens.

[0038] Fifth, the condenser lens group of the present invention uses two sets of lenses to achieve overall focal length adjustment in order to meet the requirements of different parameters of the schlieren optical path.

[0039] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the high-energy, ultra-short pulse width incandescent light source system based on argon gas according to the present invention;

[0041] Figure 2 This is a schematic diagram of the high-voltage anode and high-voltage cathode assembly of the present invention;

[0042] Figure 3 This is a schematic diagram illustrating the use of the optical device according to the present invention;

[0043] Figure 4 This is a schematic diagram of a shadowed image showing interference fringes and diffraction rings in existing technologies;

[0044] Figure 5 This is a schematic diagram of a shadow image containing speckle noise in the prior art;

[0045] The components include: storage bottle-1, flow pressure reducing valve-2, air pipe-3, outer shell-4, high-voltage energy storage capacitor-5, light focusing device-6, precision adjustment bracket-601, continuous light source-602, lens group I-603, lens group II-604, high-voltage anode-7, through hole-701, anode high-voltage column-702, access pipe-703, condenser lens group-8, flash point-9, sealed box-10, high-voltage cathode-11, grounding column-111, insulating isolation sleeve-112, negative high-voltage ring-113, ellipsoidal reflector-12, semi-sealed box-13, power supply and control system-14, and input / output module-15. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0047] In studies of airflow and other fields, schlieren imaging is commonly used to obtain images of the flow field structure in the test area. If there is no density disturbance change of a certain intensity in the flow field image of the test area, the brightness of the background of the flow field image, including color or grayscale, will not change significantly. If weak density disturbances are to be displayed, the image background must be relatively uniform; otherwise, it is difficult to obtain weak structural changes in the flow field in a background of chaotic brightness.

[0048] To meet the performance requirements of schlieren light sources in high-speed or partially ultra-high-speed flow field displays, this invention proposes a design concept for a high-energy, ultra-short pulse width incandescent light source system based on argon gas.

[0049] The high-energy, ultra-short pulse width incandescent light source system needs to be combined with the "Z"-shaped shading / schlieren method to instantly freeze the ultra-high speed flow field and obtain a flow field image with a small amount of trailing. At the same time, because the light source is a wide wavelength light source, there will be no obvious diffraction rings and interference fringes in the background of the flow field image, and the high energy of the light source can meet the normal light sensitivity of the camera target surface.

[0050] In Z-shaped schlieren imaging, the grayscale changes in the flow field image (or color changes in color schlieren) reflect the integral value of the density gradient change along the test area. This means the density gradient causes the beam to deflect, resulting in grayscale or color changes. To display subtle grayscale or color changes, the image background needs to be highly uniform, just as a small black dot on a clean white sheet is easily spotted, but difficult to find on a printed newspaper. Laser sources, with their short pulse widths (easily reaching nanosecond levels) and concentrated energy, are highly advantageous for waiting-type schlieren imaging of high-speed or even ultra-high-speed flow fields. This avoids significant motion blur when imaging high-speed moving targets and ensures normal light sensitivity of the camera target surface. However, the monochromaticity of laser sources easily introduces diffraction rings and interference fringe noise in the optical path. This noise significantly interferes with the uniformity of the background, making it difficult to identify minute grayscale changes in these noisy flow field images. Because of the multi-wavelength nature of the incandescent light source, the background of the flow field image is relatively uniform. However, in order to freeze the flow field instantaneously during waiting photography, the pulse width must be very short. Furthermore, to achieve normal light sensitivity on the camera target surface, the energy of a single pulse emitted by the light source must be high. When adjusting the optical path, since the naked eye is difficult to adapt to pulsed light sources, a continuous white light source needs to be configured within the pulsed incandescent light source. The beam angle and other parameters of this continuous white light source must be consistent with those of the pulsed incandescent light source; otherwise, the adjusted optical path may differ from the actual optical path used, resulting in uneven images or deviations in the test field of view.

[0051] For pulsed incandescent light sources, the position of the flash point at different times must not deviate too much. If the center point of light emission during each flash is randomly offset from the corresponding light emission point of the continuous light source, it will greatly increase the difficulty in actual use. This is mainly manifested in the following ways: First, it increases the difficulty of debugging the optical device for the continuous light source, as it is impossible to determine the exact location of the imaging point of the continuous light source corresponding to the pulsed light source. Second, after debugging the optical path with the light source, the optical path may shift during the actual test using the pulsed spark light source, resulting in uneven background and excessive noise in the obtained flow field image, affecting the imaging effect. Third, even if the optical path is fine in this test, it may shift again in the next test, making it impossible to fundamentally guarantee the quality of the flow field display.

[0052] To maximize the collection of pulsed beams and match the "Z"-shaped schlieren imaging optical path, a large-diameter condenser lens is used, and an ellipsoidal reflector is arranged around the light source. However, when the beam energy is too high, it may cause the camera target surface to become saturated. However, beam attenuation methods such as combined polarizers or attenuators can be used to reduce the amount of beam entering the target surface. Attenuation methods can also eliminate the interference of external stray light on the camera target surface to a certain extent, which is beneficial to improving the signal-to-noise ratio of schlieren imaging.

[0053] Specifically, this invention provides a high-energy, extremely short-pulse-width incandescent light source system based on argon gas, which can achieve extremely short pulse widths at high energies. It can be used in high-speed or partially ultra-high-speed flow field schlieren imaging to achieve low-noise flow field display, including:

[0054] A high-voltage electrode for performing arc flash when high voltage is applied, the high-voltage electrode comprising: a high-voltage anode and a high-voltage cathode capable of performing arc flash when high voltage is applied, and a predetermined distance between the high-voltage anode and the high-voltage cathode. In specific implementation, the distance between the anode and the cathode in the high-voltage electrode is adjustable to match the flash threshold requirements under different charging voltages and argon flow rates.

[0055] An argon gas supply device for supplying argon gas between high-voltage anode and high-voltage cathode includes a storage bottle. The high-pressure argon gas in the storage bottle is directly input between the high-voltage electrodes after passing through a pressure reducing valve and a gas pipe. In the pulsed incandescent light source, argon gas is used instead of conventional air as the ionization medium, which makes the discharge position of the incandescent light source more stable.

[0056] The light focusing device and condenser lens assembly, arranged opposite to each other on both sides of the high-voltage electrode, consist of a continuous light source, a lens assembly, and a precision adjustment mechanism. These components are used to image the light-emitting point of the continuous light source onto the arc flash point of the high-voltage electrode. At the same time, they ensure that the parameters of the beams emitted by the continuous light source and the pulsed incandescent light source entering the condenser lens assembly are basically the same in terms of divergence angle. Specifically, a continuous light source such as an LED is used as the light focusing source. The light source images the light-emitting point of the continuous light source onto the pulse flash point through the lens assembly, and the beam angle parameters of the beam entering the condenser lens assembly are consistent with those of the beam emitted by the pulse flash point entering the condenser lens assembly.

[0057] The focal length adjustable condenser lens group is mainly used to collect beams emitted by continuous light sources and pulsed incandescent light sources. The beam parameters can be matched with the parameters of different types of schlieren systems, that is, it can match the primary reflectors with different relative apertures in the schlieren system.

[0058] An ellipsoidal reflector reflects part of the light beam into the condenser lens group, thereby allowing more light beams to enter the schlieren imaging optical path and improving the signal-to-noise ratio of flow field imaging.

[0059] A power supply for supplying power to a high-voltage energy storage device, wherein the high-voltage energy storage device is electrically connected to a high-voltage electrode, and the high-voltage energy storage device uses multiple high-voltage capacitors connected in series or in parallel to store electrical energy. For safe use, it also includes a high-voltage energy storage protection device that isolates the high-voltage capacitors.

[0060] A control module for timing control of the high-voltage anode and high-voltage cathode;

[0061] Input / output modules that are connected to the control module and power supply.

[0062] In practical implementation, it also includes: the light source base plate and housing, and a series of components that support and seal the light source.

[0063] This invention uses argon gas instead of conventional air as the ionization medium in the high-voltage electrode, achieving an extremely short pulse width and avoiding electrode oxidation damage during arc flash. At the same time, it uses an ellipsoidal reflector and a large-aperture condenser to collect more light beams into the schlieren imaging optical path, achieving a higher signal-to-noise ratio.

[0064] Example 1

[0065] See Figure 4-5 Because of the use of a laser light source, the shadowed image contains a large number of interference fringes (A), diffraction rings (B), and speckle noise (C), which not only causes the loss of image details, but also makes it difficult to accurately measure shock wave detachment distance and boundary layer information.

[0066] like Figure 1 As shown, the storage bottle 1 supplies argon gas to the incandescent light source through the flow pressure reducing valve 2 and the gas pipe 3. The argon gas is input into the sealed box 10 at the high-pressure anode 7 and high-pressure cathode 11. This sealed box 10 prevents the rapid leakage of argon gas. The pulse flash trigger signal, flash monitoring output signal, grounding terminal and power supply of the light source are connected through the input and output module 15 of the light source. The high-pressure energy storage capacitor 5 is realized by multiple high-pressure capacitors connected in parallel. For safety, the high-pressure capacitor is sealed in a semi-sealed box 13 to prevent accidental contact by personnel. The power supply and control system 14 provides energy storage and power supply to the high-pressure energy storage capacitor 5 and performs timing control on the high-pressure anode 7 and high-pressure cathode 11. The light focusing device 6 images the continuous light source used for optical path debugging at the flash point 9. The focusing angle of the condenser lens group 8 can be adjusted. After focusing the output continuous beam and pulse beam, it can be matched with shadow / schlieren systems of different relative apertures. The ellipsoidal reflector 12 can reflect more beams into the condenser lens group 8, thereby improving the beam collection efficiency of the condenser lens group 8. The entire light source is encapsulated by the shell 4.

[0067] In this embodiment, to achieve a charging energy of ≥3J, a flash pulse width of ≤250ns, and a flash point position drift of ≤0.5mm, the incandescent light source uses six 0.01uF high-voltage capacitors connected in parallel for energy storage. At the highest charging voltage of 10kV, the requirement of 3J of electrical energy can be achieved, and the argon pressure at the high-voltage anode 7 and the high-voltage cathode 11 is maintained at 1 atmosphere.

[0068] Example 2

[0069] like Figure 2 As shown, both the high-voltage anode 7 and the high-voltage cathode 11 adopt a spherical structure to achieve a stable flash position. Specifically, argon gas flows in through the gas supply inlet pipe 703 and flows between the two high-voltage electrodes through the through hole 701. The high-voltage anode column 702 is made of Invar steel. An insulating isolation sleeve 112 is embedded on the grounding column 111 of the high-voltage cathode 11, and a negative high-voltage ring 113 is arranged on the front end of the grounding column 111. A certain distance is left between the high-voltage anode 7 and the grounding column 111, so as to facilitate intermittent arc flashing between the two electrodes and maintain the stability of the flash point position.

[0070] Furthermore, in this specific implementation, the distance between the anode and cathode in the high-voltage electrode is adjustable to match the flash threshold requirements under different charging voltages and argon flow rates.

[0071] In this example, both the high-voltage anode column 702 and the grounding column 111 are made of 10mm cylindrical Invar steel 4J36, and the radius of their front ball heads is 5mm. The distance between the front balls of the high-voltage anode 7 and the high-voltage cathode 11 is 3mm~4mm.

[0072] Example 3

[0073] like Figure 3 As shown, the continuous light source 602 is imaged onto the flash point 9 through lens group I 603 and lens group II 604. The precision adjustment bracket 601 can precisely adjust the continuous light source 602 up and down, left and right, and forward and backward in the direction relative to the optical axis. The continuous light source 602 can be imaged onto the flash point 9 with relatively accurate lens group I 603 or lens group II 604 in combination.

[0074] In this example, the continuous light source 602 is a 3W white LED light source. The aperture of lens group I 603 and lens group II 604 is 20mm and the focal length is 50mm. The precision adjustment bracket 601 can adjust the continuous light source 602 in the direction relative to the optical axis by a minimum step of 0.01mm in the up-down, left-right and forward-backward directions.

[0075] As can be seen from the above examples, this invention achieves relatively stable discharge position of the incandescent light source by using argon gas as the ionization medium and a ball-head electrode design, with a pulse width below 180 ns. Ellipsoidal reflectors are arranged around the flash point to improve the beam collection efficiency of the light source. An adjustable condenser lens is placed at the light source exit position to adapt to schlieren light paths with different relative apertures. A matching light source is set up to match the pulsed light source and the condenser lens, ensuring consistency between the debugging light path and the actual use light path. This design method meets the performance requirements of the schlieren light source in ultra-high-speed flow field displays.

[0076] The above solution is merely an illustration of a preferred example and is not limited thereto. When implementing this invention, appropriate substitutions and / or modifications can be made according to the user's needs.

[0077] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Other modifications can be readily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. An argon-based high-energy very short pulse width incandescent light source system, characterized by, The application relates to a high-voltage electrode for carrying out a high-voltage arc flash when high voltage is applied, which comprises a high-voltage anode and a high-voltage cathode capable of carrying out a high-voltage arc flash when high voltage is applied, and a predetermined distance between the high-voltage anode and the high-voltage cathode. An argon gas supply device for supplying argon gas between the high-voltage anode and the high-voltage cathode. Opposite light devices and condenser lens groups arranged on both sides of the high-voltage electrode. A power supply for supplying power to a high-voltage energy storage device which is electrically connected to the high-voltage electrode. A control module for timing control of the high-voltage anode and the high-voltage cathode. An input and output module connected to the control module and the power supply. Further comprising: An ellipsoidal reflector arranged on one side of the high-voltage electrode and spatially matched with the high-voltage arc flash point. The opposite light device comprises: A continuous light source spatially matched with the high-voltage arc flash point of the high-voltage electrode. A lens group I and a lens group II arranged between the continuous light source and the high-voltage electrode. The continuous light source is adjusted up and down, left and right and front and back in the direction of the optical axis through an adjusting mechanism. The predetermined distance between the high-voltage anode and the high-voltage cathode can be adjusted as required.

2. The argon-based high-energy very short pulse width incandescent light source system of claim 1, wherein, The high-voltage anode comprises an anode high-voltage column made of invar steel.

3. The argon-based high-energy very short pulse width incandescent light source system of claim 1, wherein, A gas supply access pipeline is inserted into the anode high-voltage column in the length direction of the anode high-voltage column and is in communication with the argon gas supply device. A through hole in communication with the gas supply access pipeline is arranged at the axial center of one end of the anode high-voltage column matched with the high-voltage cathode, so as to output argon gas to the high-voltage cathode side. The one end of the anode high-voltage column matched with the high-voltage cathode is arranged in a ball head shape. The high-voltage cathode comprises:

4. The argon-based high-energy very short pulse width incandescent light source system of claim 1, wherein, A grounding column made of invar steel, and a fixed section with a variable diameter arranged at one end matched with the high-voltage anode. An insulating isolation sleeve is arranged on the fixed section and is consistent with the larger side diameter of the grounding column. A negative high-voltage ring is arranged at the front end of the insulating isolation sleeve. The negative high-voltage ring is arranged in a ball head shape. The continuous light source adopts a white light LED light source with a power of 3W.

5. The argon-based high-energy very short pulse width incandescent light source system of claim 1, wherein, The light aperture of the lens group I and the lens group II is 20mm, and the focal length is 50mm. The adjusting step of the adjusting mechanism is 0.01mm. The high-voltage energy storage device adopts six 0.01uF high-voltage capacitors in parallel to achieve the requirement of 3J of electric energy at the highest charging voltage of 10kV.

6. The argon-based high-energy very short pulse width incandescent light source system of claim 1, wherein, ​

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