CN109327953B - Pulse strong flash light source of large tracts of land ultraviolet light wave band - Google Patents
Pulse strong flash light source of large tracts of land ultraviolet light wave band Download PDFInfo
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- CN109327953B CN109327953B CN201811368455.3A CN201811368455A CN109327953B CN 109327953 B CN109327953 B CN 109327953B CN 201811368455 A CN201811368455 A CN 201811368455A CN 109327953 B CN109327953 B CN 109327953B
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 41
- 239000002184 metal Substances 0.000 claims abstract description 41
- 239000003990 capacitor Substances 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 239000010937 tungsten Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000000930 thermomechanical effect Effects 0.000 abstract description 11
- 238000011068 loading method Methods 0.000 description 15
- 238000004880 explosion Methods 0.000 description 11
- 239000002360 explosive Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 210000002381 plasma Anatomy 0.000 description 7
- 230000005855 radiation Effects 0.000 description 6
- 238000010894 electron beam technology Methods 0.000 description 4
- 238000005474 detonation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 241000321453 Paranthias colonus Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
- H05G2/00—Apparatus or processes specially adapted for producing X-rays, not involving X-ray tubes, e.g. involving generation of a plasma
- H05G2/001—X-ray radiation generated from plasma
Abstract
The invention provides a pulse intense flashing light source with a large area ultraviolet light wave band, which can meet the research of intense pulse X-ray thermo-mechanical effect. The pulse strong flash light source of the large-area ultraviolet light wave band comprises a high-voltage pulse capacitor, a coaxial gas spark switch, a high-voltage direct-current charging power supply, a fast-forward pulse trigger, a high-voltage coaxial cable and a metal wire array; the trigger electrode of the coaxial gas spark switch is connected with the fast-forward pulse trigger, the high-voltage electrode is connected with the high-voltage pulse capacitor and the high-voltage direct-current charging power supply, the ground electrode is connected with one end of the metal wire array, and the other end of the metal wire array is grounded and connected with the grounding electrode of the high-voltage pulse capacitor.
Description
Technical Field
The invention relates to the technical field of pulse power, in particular to a pulse intense flashing light source with a large area of ultraviolet light wave band.
Background
In pulse power studies, large pulse power devices are often used in laboratories to simulate the thermo-mechanical effects of intense pulsed X-rays. In the simulation experiment, the high-fidelity soft X-ray generated by the high-power Z pinch technology is mainly loaded on the shell structure to carry out related technical research, but a high-power pulse driving source capable of meeting application requirements and outputting current of tens of megaamperes is not yet available in China.
At present, the research on the thermal-mechanical effect of the strong pulse X-ray is mainly carried out in China through the following two experimental simulation means.
First, the strong current pulse electron beam is loaded on the surface of the shell structure, the recoil impulse is generated by the rapid vaporization of the material on the surface of the shell, and the thermal shock wave is generated in the shell structure, so that the method has a similar thermo-mechanical effect as the strong pulse X-ray, and the thermo-mechanical effect of the strong pulse X-ray can be simulated in a mechanical equivalent way. The Sandia national laboratory in the United states established that an OWL-II high current pulsed electron beam accelerator can generate 670kA high current pulsed electron beams for simulating the thermo-mechanical effects of high current pulsed X-rays. However, this method is limited by the beam spot area of the high-current pulsed electron beam, and it is impossible to develop the study of the thermo-mechanical effect of the full-size shell structure.
Secondly, the detonation wave generated by chemical explosion is used as an initial equivalent pulse load of vaporization recoil impulse to be loaded on the shell structure, and the thermal-mechanical effect of strong pulse X-rays is simulated on effect equivalent, so that the method is used for structural response research of the full-size shell structure. The chemical explosion simulation experiment mainly comprises modes of flexible explosive loading, sheet explosive loading, fly sheet driving loading and the like. The pulse load impulse of the soft explosive loading is poor in fidelity of distribution and size, and in loading of the flake explosive, the loading duration is long, the loading is poor in concurrence, the pulse load with small impulse cosine distribution is not easy to obtain, and the loading uniformity is poor.
Because of the defects in the two modes, the applicant currently mainly detonates the photosensitive explosive sprayed on the surface of the shell structure instantaneously by strong pulse flash, and applies pulse load to the shell structure to simulate the thermo-mechanical effect of strong pulse X rays. The method can simulate the pulse load effect caused by strong pulse X-rays more truly, is an ideal chemical explosion loading method, has the advantages of good surface loading concurrency, load cosine distribution law, small load amplitude, easier control of impulse loading and the like, and is particularly suitable for discontinuous load loading on the surface of a large complex structure. However, the loading mode of the photosensitive explosive lacks a large-area flash light source capable of detonating the photosensitive explosive so as to detonate the photosensitive explosive sprayed on the surface of the shell structure, and the loading mode is further used for simulating the pulse loading effect caused by strong pulse X-rays.
Disclosure of Invention
The invention provides a pulse intense flashing light source with a large area ultraviolet light wave band, which can meet the research of intense pulse X-ray thermo-mechanical effect.
The technical scheme of the invention is as follows:
a pulse strong flash light source of a large-area ultraviolet light wave band comprises a high-voltage pulse capacitor, a coaxial gas spark switch, a high-voltage direct-current charging power supply, a fast-forward pulse trigger, a high-voltage coaxial cable and a metal wire array; the trigger electrode of the coaxial gas spark switch is connected with the fast-forward pulse trigger, the high-voltage electrode is connected with the high-voltage pulse capacitor and the high-voltage direct-current charging power supply, the ground electrode is connected with one end of the metal wire array, and the other end of the metal wire array is grounded and connected with the grounding electrode of the high-voltage pulse capacitor.
Further, the ground electrode of the coaxial gas spark switch is connected with one end of the wire array through a high-voltage coaxial cable.
Further, the high voltage coaxial cable has a characteristic impedance of less than 50 ohms.
Further, the metal wire array is a planar wire array formed by connecting 1-20 metal wires in parallel.
Further, the metal wire array is made of tungsten wires and copper wires.
Further, the diameter of the metal wires in the metal wire array is 0.1-0.5 mm.
Further, the coaxial gas spark switch is a three-electrode gas switch, and each electrode is of a conical structure.
Further, the inflation medium of the coaxial gas spark switch is nitrogen.
Compared with the prior art, the invention has the following technical effects:
1. the invention uses the light radiation of the metal wire electric explosion plasma as a strong pulse flash light source, and has the advantages of simple structure, easy realization and the like; the large-area strong pulse flash is easier to obtain in engineering through parallel discharge of a plurality of metal wires, so that uniform and synchronous detonation of the large-area photosensitive explosive is realized, and the method is the most feasible method for simulating the strong pulse X-ray thermo-mechanical effect.
2. The invention adopts the low-impedance high-voltage coaxial cable to transmit and load the pulse heavy current generated by the pulse power driving source to the metal wire load, thereby effectively reducing the current loss of the discharge loop.
3. The invention adopts a plane wire array composed of a plurality of metal tungsten wires or metal copper wires, and generates the light radiation of electric explosion plasma under the drive of pulse heavy current, so that the strong pulse flash light with large-area uniform radiation is easier to obtain.
4. The invention adopts the gas spark switch with a coaxial structure, realizes the structural integration of the gas switch and the high-voltage pulse capacitor, effectively reduces the inductance of the discharge loop and obtains larger discharge loop current.
Drawings
FIG. 1 is a schematic diagram of a pulsed intense flash light source in the large area ultraviolet band of the present invention;
FIG. 2 is a graph of the light pulse waveform of a pulsed intense flash light source in the large area ultraviolet band of the present invention;
FIG. 3 is a diagram showing the flash spectrum of the pulse intense flash light source of the large area ultraviolet band of the present invention.
Reference numerals: 1-a high voltage pulse capacitor; 2-coaxial gas spark switch; 3-a high-voltage direct-current charging power supply; 4-fast-forward pulse flip-flop; 5-high voltage coaxial cable; 6-wire array.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and specific examples:
the invention realizes a large-area ultraviolet band pulse intense flashing light source, which has important application prospects in photochemical reaction research, intense pulse X-ray thermo-mechanical effect research, strong light pressing weapon research and the like. The pulse strong-flash light source with the large-area ultraviolet light wave band provided by the invention detonates the photosensitive explosive sprayed on the surface of the shell structure, thereby simulating the pulse load effect caused by strong pulse X rays.
The invention uses the light radiation of the metal wire electric explosion plasma as a strong pulse flash light source, and has the advantages of simple structure, easy realization and the like; the large-area strong pulse flash is easier to obtain in engineering through parallel discharge of a plurality of metal wires, so that uniform and synchronous detonation of the large-area photosensitive explosive is realized, and the method is the most feasible technical method for simulating the strong pulse X-ray thermo-mechanical effect.
Fig. 1 shows a structure diagram of a pulse intense flash light source of a large-area ultraviolet light wave band, which comprises a high-voltage pulse capacitor 1, a coaxial gas spark switch 2, a high-voltage direct-current charging power supply 3, a fast-forward pulse trigger 4, a high-voltage coaxial cable 5 and a metal wire array 6, wherein a trigger electrode of the coaxial gas spark switch 2 is connected with the fast-forward pulse trigger 4, a ground electrode is connected with one end of the metal wire array 6, and a high-voltage electrode is connected with the high-voltage pulse capacitor 1 and the high-voltage direct-current charging power supply 3. The specific connection mode is as follows: the fixed interface of the high-voltage pulse capacitor 1 is connected with the charging interface (namely, the high-voltage electrode) of the coaxial gas spark switch 2, the high-voltage direct-current charging power supply 3 is connected with the charging interface (namely, the high-voltage electrode) of the coaxial gas spark switch 2, the fast-leading-edge pulse trigger 4 is connected with the triggering interface (namely, the triggering electrode) of the coaxial gas spark switch 2, one end of the high-voltage coaxial cable 5 is connected with the discharging end (namely, the ground electrode) interface of the coaxial gas spark switch 2, and the metal wire array 6 is connected with the other end of the high-voltage coaxial cable 5.
The coaxial gas spark switch 2 may be a three-electrode gas switch, and each electrode has a conical structure. The invention adopts the gas spark switch with a coaxial structure, realizes the structural integration of the gas switch and the high-voltage pulse capacitor, effectively reduces the inductance of the discharge loop and obtains larger discharge loop current.
The invention adopts the low-impedance high-voltage coaxial cable, the characteristic impedance is smaller than 50 ohms, and the low-impedance high-voltage coaxial cable transmits and loads the pulse heavy current generated by the pulse power driving source to the metal wire load, so that the current loss of a discharge loop can be effectively reduced.
The metal wire array 6 is a planar wire array formed by connecting 1-20 metal wires in parallel, the number of the metal wires can be set according to actual requirements, and the diameter of the metal wires can be specifically 0.1-0.5 mm.
The invention adopts a plane wire array composed of a plurality of metal tungsten wires or metal copper wires, and generates the light radiation of electric explosion plasma under the drive of pulse heavy current, so that the strong pulse flash light with large-area uniform radiation is easier to obtain.
In a specific application example, the impedance of the high-voltage coaxial cable is 22 ohms, the electrical length is 100ns, the capacitance value of the high-voltage pulse capacitor is 6 mu F, the inflation medium of the coaxial gas spark switch is nitrogen, and the working pressure is 0.1MPa. When the output voltage of the high-voltage direct-current power supply is 30kV, the coaxial gas switch is conducted by using the fast-forward pulse trigger, and further, 80kA of pulse large current is generated in the discharge loop, and the waveform of the current pulse is shown in fig. 2.
In use, the amplitude of the pulse high current can be improved by improving the on-voltage of the coaxial gas spark switch, when the on-voltage of the switch is 36.7kV, the pulse high current is used for driving 10 parallel metal copper wires to generate electric explosion plasmas, and strong pulse flash light with a large area ultraviolet light wave band is radiated, and the light pulse waveform of the strong flash light is shown in figure 3.
The principle of the invention for generating large-area strong pulse flash by metal wire electric explosion is as follows: when a pulse high current generated by a pulse power driving source (consisting of a high-voltage pulse capacitor, a coaxial gas spark switch, a high-voltage direct-current charging power supply, a fast-forward pulse trigger, a high-voltage coaxial cable and the like) passes through the metal wire array, the metal wire generates electric explosion due to the fast heating effect of the pulse high current, so that pulse discharge plasma is formed, and component particles in the pulse discharge plasma have high temperature, so that strong pulse flash is radiated outwards; further, by means of electric explosion of a plurality of parallel wires, a large-area strong pulse flash can be formed.
Claims (6)
1. A pulse strong flash light source of large tracts of land ultraviolet light wave band, its characterized in that: the high-voltage pulse capacitor comprises a high-voltage pulse capacitor (1), a coaxial gas spark switch (2), a high-voltage direct-current charging power supply (3), a fast-leading-edge pulse trigger (4) and a metal wire array (6);
the trigger electrode of the coaxial gas spark switch (2) is connected with the fast-forward pulse trigger (4), the high-voltage electrode is connected with the high-voltage pulse capacitor (1) and the high-voltage direct-current charging power supply (3), the ground electrode is connected with one end of the metal wire array (6), and the other end of the metal wire array (6) is grounded and connected with the grounding electrode of the high-voltage pulse capacitor (1);
the ground electrode of the coaxial gas spark switch (2) is connected with one end of the metal wire array (6) through a high-voltage coaxial cable (5);
the characteristic impedance of the high-voltage coaxial cable (5) is less than 50 ohms and greater than or equal to 22 ohms.
2. The pulsed, intense-flash light source of claim 1 for the large area ultraviolet light band, wherein: the metal wire array (6) is a planar wire array formed by connecting 1-20 metal wires in parallel.
3. A pulsed, intense flash light source of the large area ultraviolet band of claim 2 wherein: the metal wire array (6) is made of tungsten wires and copper wires.
4. A pulsed, intense flash light source of the large area ultraviolet band of claim 3 wherein: the diameter of the metal wires in the metal wire array (6) is 0.1-0.5 mm.
5. The pulsed, intense flash light source of claim 4 for the large area ultraviolet light band, wherein: the coaxial gas spark switch (2) is a three-electrode gas switch, and each electrode is of a conical structure.
6. The pulsed, intense flash light source of claim 5 for the large area ultraviolet light band of claim 5 wherein: the inflation medium of the coaxial gas spark switch (2) is nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811368455.3A CN109327953B (en) | 2018-11-16 | 2018-11-16 | Pulse strong flash light source of large tracts of land ultraviolet light wave band |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811368455.3A CN109327953B (en) | 2018-11-16 | 2018-11-16 | Pulse strong flash light source of large tracts of land ultraviolet light wave band |
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| Publication Number | Publication Date |
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| CN109327953A CN109327953A (en) | 2019-02-12 |
| CN109327953B true CN109327953B (en) | 2024-03-12 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113916370B (en) * | 2021-11-10 | 2023-09-01 | 西北核技术研究所 | System and method for detecting uniformity of light radiation of metal wire electric explosion plasma |
| CN114102270B (en) * | 2021-11-10 | 2022-09-23 | 西北核技术研究所 | Method for improving radiation light intensity of metal wire in strong pulse flash light source |
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