CN204789613U - Plasma's momentum testing arrangement - Google Patents
Plasma's momentum testing arrangement Download PDFInfo
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- CN204789613U CN204789613U CN201520503818.5U CN201520503818U CN204789613U CN 204789613 U CN204789613 U CN 204789613U CN 201520503818 U CN201520503818 U CN 201520503818U CN 204789613 U CN204789613 U CN 204789613U
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Abstract
The utility model relates to a plasma's momentum testing arrangement, including light source, simple pendulum, right angle be all -trans prism, photoelectron and oscillograph, the first detection light beam that the light source sent obtains surveying the light beam with the parallel second of first detection light beam after the right angle is all -trans the prismatic reflection, the second is surveyed the light beam and is jeted into the photoelectron, the photoelectron with the oscillograph is connected, the simple pendulum sets up light source and right angle are all -trans between the prism target and the filament of connection in the target below, can sweep during the filament swing first detection light beam and second detection light beam. The utility model has the advantages of simple structure, the light path regulation degree of difficulty are hanged down and speed measurement accuracy height.
Description
Technical field
The utility model relates to plasma measurement field, particularly relates to a kind of momentum testing device of plasma.
Background technology
Light laser and target produce the plasma of supersonic velocity when interacting, according to momentum conservation, produce an acting force in the opposite direction of plasma jet, this acting force can as a kind of propelling source newly, the ultimate principle of laser plasma propelling that Here it is.Because laser plasma Push Technology is advancing the advantage in specific impulse, launch cost, environmental protection, safety etc., obtains in the past several years and developing rapidly.The momentum of plasma generation is the problem first will considered during laser plasma advances, the momentum produced due to laser plasma is very little, and the action time of plasma and object is very short, therefore the speed how measured in the momentum, particularly momentum of this plasma is a problem first needing to solve.For the momentum survey of laser plasma, in actual experiment, utilizing principle of conservation of momentum realize, according to momentum conservation, is the momentum of plasma by the momentum of the momentum of the object of laser ablation and target, for target momentum, key is the speed obtaining target.Generally adopt single pendulum method to measure at present experimentally, the method is that the target of laser ablation is hung into a single pendulum, and the angle swung after ablation by measurement target or amplitude obtain the speed of target.Because the method is the measuring method that a kind of structure is simple, easy to operate, measuring accuracy is relatively high, and adopted by most research group, but the method is indirect inspection, introduces error larger.In the past few years, technician proposes parallel double detection photo measure method, described parallel double detection photo measure method eliminates the width of target own and detects light spot size to the impact of velocity survey, but, because two bundle detection light have employed two arbitrary sources and two independently photodetection receiver, when the distance of two-beam is at 2-3 millimeter, the erection of instrument is complicated, measurement mechanism burden, the difficulty on optical path adjusting causes great impact to measuring accuracy.
As can be seen here, the momentum testing device of above-mentioned existing a kind of plasma, in structure, method and use, obviously still has inconvenience and defect, and is urgently further improved.How to found the momentum testing device of new a kind of plasma that a kind of test unit is simple, optical path adjusting difficulty is low, velocity survey precision is high, one of current important research and development problem of real genus.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of momentum testing device of plasma, make it have structure simple, regulate that difficulty is low, velocity survey precision advantages of higher, thus overcome the deficiencies in the prior art.
For solving the problems of the technologies described above, the momentum testing device of a kind of plasma of the utility model, comprise light source, single pendulum, be all-trans prism at right angle, photoelectric tube and oscillograph, the first detecting light beam that described light source sends obtains second detecting light beam parallel with the first detecting light beam after right angle is all-trans prismatic reflection, described second detecting light beam injects described photoelectric tube, described photoelectric tube is connected with described oscillograph, described single pendulum is arranged on described light source and right angle is all-trans between prism, comprise target and be connected to the filament below target, described filament can skim over described first detecting light beam and the second detecting light beam when swinging.
Improve as one of the present utility model, a semi-transparent semi-reflecting prism is also provided with between described light source and described single pendulum, described first detecting light beam is the transmitted light beam of light beam after semi-transparent semi-reflecting prism that light source sends, and described second detecting light beam injects described photoelectric tube after described semi-transparent semi-reflecting prismatic reflection.
As further improvement, the target in described single pendulum is bifilar suspension target.
As further improvement, described light source is He-Ne radiant.
After adopting such design, the utility model at least has the following advantages:
The utility model proposes the parallel detection optical experimental setup of single light source simple detector, this experimental provision uses instrument less, single light source and single receiver are only used, experimental provision is simple, optical path adjusting difficulty is low, and data are accurately complete, and measurement result is not by the restriction that detecting light beam spacing regulates, thus improve the precision of velocity survey, the measurement of the laser plasma momentum that the speed that is applicable to is low, displacement is little.
Accompanying drawing explanation
Above-mentioned is only the general introduction of technical solutions of the utility model, and in order to better understand technological means of the present utility model, below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
Fig. 1 is structural representation of the present utility model and light path schematic diagram.
Fig. 2 is the time signal schematic diagram that oscillograph of the present utility model gathers.
Embodiment
A kind of momentum testing device of plasma, comprise light source, single pendulum, right angle are all-trans prism, photoelectric tube and oscillograph, the first detecting light beam that light source sends obtains second detecting light beam parallel with the first detecting light beam after right angle is all-trans prismatic reflection, second detecting light beam injects described photoelectric tube, photoelectric tube is connected with oscillograph, single pendulum is arranged on described light source and right angle is all-trans between prism, comprise target and be connected to the filament below target, when filament swings, described first detecting light beam and the second detecting light beam can be skimmed over.
Further specifically, be also provided with a semi-transparent semi-reflecting prism between light source and single pendulum, the first detecting light beam is the transmitted light beam of light beam after semi-transparent semi-reflecting prism that light source sends, and the second detecting light beam is incident light fulgurite after semi-transparent semi-reflecting prismatic reflection.Target in single pendulum is bifilar suspension target, and light source is He-Ne radiant.
Below an embodiment:
Fig. 1 is structural representation of the present utility model and light path schematic diagram, a kind of plasma momentum survey device, comprises He-Ne radiant 101, semi-transparent semi-reflecting prism 104, the single pendulum hanging with target 108 and filament 107, right angle is all-trans prism 109, photoelectric tube 103, oscillograph 102.The distance that this measurement mechanism skims between time of the first detecting light beam 105 and the second detecting light beam 106 and two bundle detecting light beams according to filament 107 obtains the flying speed of target 108, is then obtained the momentum of plasma by the quality of target 108.
He-Ne radiant 101 produces laser beam, by producing transmitted light after semi-transparent semi-reflecting prism 104 as the first detecting light beam 105, it is the second detecting light beam 106 that first detecting light beam 105 is all-trans through right angle that prism 109 turns back, second detecting light beam 106 is through filament 107, again through semi-transparent semi-reflecting prism 104, reflected light enters photoelectric tube 103, is finally input to oscillograph 102 and carries out signal record.Target 108 gets up with bifilar suspension, and target 108 connects filament 107 below, and form a two-wire single pendulum, two-wire single pendulum can well solve the problem that swings of target 108.Be all-trans by right angle the Reflective regulation of prism 109, is easy to the adjustment of the spacing realizing the first detecting light beam 105 and the second detecting light beam 106.
He-Ne radiant 101 is only as light source, the light beam that continuous print, spot diameter are very little is provided, other can provide the light source of light beam also can use, and measuring the speed that obtains is the speed of target 108 in equilibrium position, the speed of filament 107 when namely target 108 drops to minimum point.
Concrete measuring process is: when filament 107 skims over the first detecting light beam 105 and the second detecting light beam 106, oscillograph 102 can present corresponding two signals, interval between two signals is exactly filament 107 by the time of the first detecting light beam 105 and the second detecting light beam 106, as shown in Figure 2.The ratio in the distance between the first detecting light beam 105 and the second detecting light beam 106 and the time interval on oscillograph 102 is exactly the swing speed of target 108, the product of the quality of this speed and target 108 is exactly target momentum, according to principle of conservation of momentum, this target momentum is exactly the momentum that laser plasma produces.
The above; it is only preferred embodiment of the present utility model; not do any pro forma restriction to the utility model, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in protection domain of the present utility model.
Claims (4)
1. the momentum testing device of a plasma, it is characterized in that comprising light source, single pendulum, be all-trans prism at right angle, photoelectric tube and oscillograph, the first detecting light beam that described light source sends obtains second detecting light beam parallel with the first detecting light beam after right angle is all-trans prismatic reflection, described second detecting light beam injects described photoelectric tube, described photoelectric tube is connected with described oscillograph, described single pendulum is arranged on described light source and right angle is all-trans between prism, comprise target and be connected to the filament below target, described filament can skim over described first detecting light beam and the second detecting light beam when swinging.
2. the momentum testing device of a kind of plasma according to claim 1, it is characterized in that between described light source and described single pendulum, being also provided with a semi-transparent semi-reflecting prism, described first detecting light beam is the transmitted light beam of light beam after semi-transparent semi-reflecting prism that light source sends, and described second detecting light beam injects described photoelectric tube after described semi-transparent semi-reflecting prismatic reflection.
3. the momentum testing device of a kind of plasma according to claim 1 and 2, is characterized in that the target in described single pendulum is bifilar suspension target.
4. the momentum testing device of a kind of plasma according to claim 1 and 2, is characterized in that described light source is He-Ne radiant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520503818.5U CN204789613U (en) | 2015-07-13 | 2015-07-13 | Plasma's momentum testing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520503818.5U CN204789613U (en) | 2015-07-13 | 2015-07-13 | Plasma's momentum testing arrangement |
Publications (1)
| Publication Number | Publication Date |
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| CN204789613U true CN204789613U (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520503818.5U Expired - Fee Related CN204789613U (en) | 2015-07-13 | 2015-07-13 | Plasma's momentum testing arrangement |
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| CN (1) | CN204789613U (en) |
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2015
- 2015-07-13 CN CN201520503818.5U patent/CN204789613U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20160713 |
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| CF01 | Termination of patent right due to non-payment of annual fee |