CN107091854A - Simulate experimental provision and its control method that femtosecond laser interacts with cirrocumulus - Google Patents
Simulate experimental provision and its control method that femtosecond laser interacts with cirrocumulus Download PDFInfo
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/14—Investigating or analyzing materials by the use of thermal means by using distillation, extraction, sublimation, condensation, freezing, or crystallisation
- G01N25/142—Investigating or analyzing materials by the use of thermal means by using distillation, extraction, sublimation, condensation, freezing, or crystallisation by condensation
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G15/00—Devices or methods for influencing weather conditions
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Abstract
A kind of experimental provision for simulating femtosecond laser and cirrocumulus interaction, including：Femto-second laser, lens, low-temp. refrigerator, humiture detection device, aerosol generator, scanning electromobility particle size spectrometer, digital camera, beam collection device, lens focus on femto-second laser pulse, incide in ultralow temperature high humility chamber, Femtosecond Optical Pulses are in the chamber into silk, so as to the interaction between Study of Laser silk and the cirrocumulus of simulation, the water dust in chamber is caused to undergo phase transition, the process of induction condensation vapor and sedimentation.The humiture environment of accurate simulation cirrocumulus of the invention, simple in construction, easy-to-operate is cheap, the cirrocumulus and laser interaction that ice crystal is rich in suitable for researching and analysing produce water condensation and the phenomenon of sedimentation, are also applied for analyzing the repercussion study of other cloud and mist conditions and laser.
Description
Technical field
The present invention relates to artificial induction's rainfall field, the specially condensation vapor inside induced with laser cirrocumulus and heavy
Drop, it is particularly a kind of to simulate Pilot Unit and its control method that femtosecond laser interacts with cirrocumulus.
Background technology
Weather modification, refers to avoid or mitigating meteorological disaster, rationally using climate resources, under proper condition
Artificial affecting is carried out to the physics of local atmosphere, chemical process by technological meanses, realize increase sleet, hail suppression, the rain that disappears, fog dispersal,
The activity of the purposes such as frost prevention.
So far, traditional method mainly sows short grained dry ice, silver iodide and other salt in the clouds.
Because rain making snowfall has important influence to agricultural and the mankind other activities, therefore, research rain making snowfall problem is outstanding
To be important.In recent years, with the fast development of femtosecond laser technology, ultra-intense ultra-short laser pulse, which is injected, is demonstrated to production in air
Raw a plasma channel, i.e. laser chevilled silk, chevilled silk can produce the hygroscopic matter formation nuclei of condensation and excite steam so as to induce
Condense and infall process.Based on the unique property of laser chevilled silk, laser chevilled silk has many in terms of femtosecond laser induction water condensation
Potential application, and cause extensive concern.Therefore, the basic research and explorative research research of correlation are carried out with particularly significant
Meaning.
At present, the correlative study on induced with laser water condensation in air and cloud chamber has deployed
[referring to document：
1.P.Rohwetter et al.,Nature Photonics 4,451(2010)；
2.J.Kasparian,L.and J.-P.Wolf,Optics&Photonics News 21(7),22,
(2010)；
3.Y.Petit et al.,Applied Physics Letters 97,021108(2010)；
4.Y.Petit,et al.,Applied Physics Letters 98,041105(2011)；
5.K.Yoshihara et al.,Proc Japan Academy.Series B,Physical&Biological
Sciences 83,320(2007)；
6.D.Mogin et al,Sci.Rep.5,14978(2015)；
7.J.Ju et al,PRE,88 062803(2013)；
8.J.Ju et al,Applied Physics B 117,1001-1007(2014)；
9.H.Sun et al,Applied Physics B 121,155-169(2015)；
10.H.Liang et al,Chin.Opt.Lett.13(3),033201(2015)；
11.Y.Liu et al,Opt.Express 24,7364-7373(2016)；
12.Ju J,Liu J,Hong L,et al.Scientific Reports 6,25417(2016).]
Wherein, the interaction of laser and cirrocumulus is particularly noticeable.The general large area of cirrus is formed at tropospheric
Upper strata, its height is between 6 to 12 kilometers, and temperature is less than -37 DEG C, and because all water is freezed by homogeneous nucleation,
Ice is comprised only in cirrus.Precipitation in middle latitude cirrus is depended on by the supercooled cloud droplet of the active aerosol particle promotion of ice
It is heterogeneous to freeze and then long by the ice particle at vapor deposition and edge.Because good ice-nucleus is very rare in an atmosphere
See, ice and liquid cloud particle can coexist at a temperature of higher than -37 DEG C.Therefore the ice such as silver iodide or dry ice active material can be with
For inducing rain making, but the method is expensive, and uncertainty is big and easily causes environmental pollution.Femtosecond laser can
So that in atmospheric turbulance and cloud, into silk, therefore very long distance can be propagated, it is easy to Remote, and cost is small, accurately
Degree is high.Therefore, the interaction of femtosecond laser is produced plasma channel (chevilled silk) and cirrus has great researching value.
Pilot Unit and its control method that femtosecond laser interacts with cirrocumulus are simulated, its core technology is control
Femtosecond laser processed induces the temperature and humidity of water condensation simulation system medium cloud room environmental.The method used at present has in cloud chamber bottom plate
Lower face condenser pipe, then adjusts the environment temperature of chamber by way of compressor compresses cool down condenser pipe, and by adding
Resistance wire above hot cloud room in reservoir increases humidity, and this method is complicated, and cost is higher, and humiture can not be controlled accurately
System, and do not reach the humiture demand of cirrus.In addition, also have the temperature adjusted by way of dry ice refrigeration in cloud chambers,
Dry ice due to its it is volatile the features such as, be widely used in terms of refrigeration.The method operation of dry ice refrigeration is simple, and cost also compares
It is relatively low, but be due to it and volatile, distil as atmospheric carbon dioxide of big 600-800 times than solid volume, so using dry
Ice refrigeration can not easily set off an explosion in good seal performance, the container of small volume, meanwhile, although dry ice refrigeration temperature can
To reach -37 degrees Celsius, but environment temperature is difficult to maintain.Also a kind of method based on semiconductor refrigerating, i.e., above cloud chamber
Plus semiconductor chilling plate, the system architecture is simple, easy-to-operate, but still there is thermograde, temperature inside cloud chamber
Degree is uneven, and humidity is uncontrollable.
The content of the invention
Present invention aims at solving above-mentioned prior art to cannot be used for the problem of cirrocumulus is tested, propose that a kind of simulation flies
Pilot Unit and its control method that second laser interacts with cirrocumulus.The present invention occurs using temperature controller and aerosol
Device, the epidemic disaster come in control chamber room is realized the accurate simulation to cirrocumulus temperature and humidity conditions and induced with laser water condensation and sunk
The research of drop.The system architecture is simple, and easy-to-operate is cheap, can accurately simulate different humiture environmental conditions, and
And minimum temperature can reach subzero 60 degrees Celsius.
The technical solution of the present invention is as follows：
A kind of experimental provision for simulating femtosecond laser and cirrocumulus interaction, including：Femto-second laser, lens, low temperature
Refrigerator, humiture detection device, aerosol generator, scanning electromobility particle size spectrometer, digital camera, beam collection
Device；
There are described low-temp. refrigerator four face all disks on the outside of a stainless steel cube cavity inner bag, inner bag to have condenser pipe
With super thick environment-friendly insulating material, inner bag top is to be below temperature controller, inner bag in compressor and heat-exchange device, the inner bag
Equipped with Height Adjustable sample collection platform；
Low-temp. refrigerator cabinet door is provided with a side of described low-temp. refrigerator, the low-temp. refrigerator cabinet door is provided with water-setting
Tie and be respectively equipped with laser light incident window and laser exit window on watch window, another two relative sides of the low-temp. refrigerator
Mouthful, the laser beam that described femto-second laser is exported is entered after described lens focus by described laser light incident window
Inject described low-temp. refrigerator, form plasma channel, i.e. laser chevilled silk in the low-temp. refrigerator, induction excite water condensation with
And sedimentation, finally by described laser emitting window outgoing, and collected by beam collection device；
Particle diameter detection port, aerosol are additionally provided with another two relative sides of described low-temp. refrigerator and enters port
First humiture detects port and the second humiture detection port, described water condensation watch window, laser light incident window, laser
Exit window is respectively mounted quartz glass seals, and the first described humiture, which detects port, the second humiture detection port, guarantor
Warm plug seal；
The first humiture probe of described humiture detection device detects port by the first described humidity and enters institute
The low-temp. refrigerator stated, and being fixed on described sample collecting table near laser chevilled silk, the of described humiture detection device
Two humitures probe detects through hole by the second described humiture and enters described low-temp. refrigerator, and is fixed on the low temperature cold
The edge of cabinet inner bag；
Described aerosol generator enters through hole by described aerosol to be carried out to the inner bag of described low-temp. refrigerator
Humidification；
Described scanning electromobility particle size spectrometer detects through hole to described low temperature cold by described particle diameter
The particle size data that the inside of cabinet produces particle is detected；
Described digital camera is by described water condensation watch window, the water condensation situation inside observation.
The control method of the experimental provision interacted using above-mentioned simulation femtosecond laser and cirrocumulus, the control method bag
Include following steps：
1. femto-second laser is opened, laser output parameter is adjusted, the position of the described condenser lens of regulation makes femtosecond laser
Core formation plasma channel, i.e. femtosecond laser chevilled silk in described low-temp. refrigerator, laser silk and the volume simulated
Cumulus interacts, and causes the water dust in chamber to undergo phase transition, induction condensation vapor and sedimentation；
2. the temperature of the temperature controller on the low-temp. refrigerator is set, it is cirrocumulus to make the reaction temperature in low-temp. refrigerator
Internal temperature；
3. the flow of aerosol generator is adjusted, it is cirrocumulus interior humidity to make the humidity in low-temp. refrigerator；
4. the low-temp. refrigerator internal state in whole process is monitored by water condensation watch window using digital camera；
5. the particle diameter that is produced in the low-temp. refrigerator is monitored in real time using scanning electromobility particle size spectrometer
Distribution situation.
Compared with prior art, the remarkable advantage that the present invention has：
1st, by adjusting the environment temperature in the design temperature of the temperature controller on refrigerator, accuracy controlling chamber for air
Middle cirrus temperature, and can keep stable, the system architecture of this method is simpler, operation more safe ready, price
More cheap, Regulate Environment temperature is more precisely effective.
2nd, using the cooperation of aerosol generator and humidity sensor, the damp condition in accurate control cloud chamber, and protect
Hold constant, it is this to provide easy to operate, it is simple in construction.
3rd, the induced with laser water condensation that is adapted to carry out in the different epidemic disaster environment outside cirrus temperature and humidity conditions and heavy
The basic research of drop；Temperature control device and humidity conditioner can accurately adjust temperature and humidity in chamber, so as to simulate chamber
Indoor different environmental condition.
Brief description of the drawings
The structural perspective for the experimental provision that Fig. 1 interacts for present invention simulation femtosecond laser with cirrocumulus；
Embodiment
The present invention is described in detail with reference to embodiment and accompanying drawing, but the protection model of the present invention should not be limited with this
Enclose：
Referring to Fig. 1, Fig. 1 is the control environment epidemic disaster of the invention based on coolant refrigeration component and aerosol generator
The structural representation of Pilot Unit system that interacts of simulation femtosecond laser and cirrocumulus.As seen from the figure, Yi Zhongji
Interacted in the simulation femtosecond laser of coolant refrigeration component and the control environment epidemic disaster of aerosol generator with cirrocumulus
Experimental provision, including：Femto-second laser 1, lens 2, low-temp. refrigerator 3, humiture detection device 4, aerosol generator 5, scanning
Electromobility particle size spectrometer 6, beam collection device 7, digital camera 17.
There are described low-temp. refrigerator 3 four face all disks on the outside of a stainless steel cube cavity inner bag, inner bag to have condensation
It is temperature controller 8 above pipe and super thick environment-friendly insulating material, inner bag, inner bag lower section is compressor and heat-exchange device 9, and this is interior
Courage is built with Height Adjustable sample collection platform 19；
It is provided with low-temp. refrigerator cabinet door 18, the low-temp. refrigerator cabinet door 18 and sets on a side of described low-temp. refrigerator 3
Have and be respectively equipped with laser light incident window (10) on water condensation watch window 13, another two relative sides of the low-temp. refrigerator 3
With laser emitting window 14, the laser beam that described femto-second laser 1 is exported is after the described focusing of lens 2, by described
Laser light incident window 10 enter to inject described low-temp. refrigerator 3, form plasma channel, i.e. laser in the low-temp. refrigerator 3
Chevilled silk, induction excites water condensation and sedimentation, finally by described laser emitting window (14) outgoing, and is filled by beam collection
Put 7 collections；
Particle diameter detection port 16, aerosol is additionally provided with another two relative sides of described low-temp. refrigerator 3 to enter
The humiture of port 12 first detection port 11 and second humiture detection port 15, described water condensation watch window 13, laser
Incidence window 10, laser emitting window 14 are respectively mounted quartz glass seals, described the first humiture detection the 11, second temperature of port
Humidity detection port 15 has insulation plug seal；
The first humiture probe 20 of described humiture detection device 4 detects port 11 by the first described humidity and entered
Enter described low-temp. refrigerator 3, and be fixed on described sample collecting table 19 near laser chevilled silk, described humiture detection dress
The the second humiture probe 21 for putting 4 detects through hole 15 into described low-temp. refrigerator 3 by the second described humiture, and fixes
In the edge of the inner bag of low-temp. refrigerator 3；
Described aerosol generator 5 enters the inner bag of the low-temp. refrigerator 3 described in 12 pairs of through hole by described aerosol
Humidified；
Described scanning electromobility particle size spectrometer 6 detects the low temperature described in 16 pairs of through hole by described particle diameter
The particle size data that the inside of refrigerator 3 produces particle is detected；
Described digital camera 17 is by described water condensation watch window 13, the water condensation situation inside observation.
Temperature controller above the described low-temp. refrigerator of control, sets experimental temperature, opens switch, starts refrigeration；Beat
Described aerosol generator is opened, control aerosol enters flow velocity, while opening in the monitoring in real time of described humiture detector
The humiture state in portion；After a period of time, temperature is down to design temperature (cirrus temperature), while humidity reaches experiment requirements
(cirrocumulus interior humidity).
Femto-second laser is opened, output light is adjusted, described lens, laser are set gradually in the laser beam direction of output
Incidence window, laser emitting window and beam collection device, the laser beam that described femto-second laser is launched, by described
Lens focus, in described low-temp. refrigerator formed laser chevilled silk, chevilled silk ionization produce plasma, induction excite water condensation with
And infall process.
Specific control method comprises the following steps：
1. femto-second laser 1 is opened, laser output parameter is adjusted, the position of the described condenser lens 2 of regulation swashs femtosecond
Core formation plasma channel, i.e. femtosecond laser chevilled silk of the light in described low-temp. refrigerator 3, laser silk and simulation
Cirrocumulus interacts, and causes the water dust in chamber to undergo phase transition, induction condensation vapor and sedimentation；
2. the temperature of the temperature controller 8 on the low-temp. refrigerator 3 is set, it is volume to make the reaction temperature in low-temp. refrigerator 3
Cumulus internal temperature；
3. the flow of aerosol generator 5 is adjusted, it is cirrocumulus interior humidity to make the humidity in low-temp. refrigerator 3；
4. monitored using digital camera 17 by water condensation watch window 13 inside the low-temp. refrigerator 3 in whole process
State；
5. the particle that produces in the low-temp. refrigerator 3 is monitored in real time using scanning electromobility particle size spectrometer 6
Footpath distribution situation.
The results showed, the present invention can be by controlling the temperature setting button of temperature controller, the described low temperature of regulation
Environment temperature in refrigerator；By changing the ring in the outgoing gas flow of aerosol generator, the described low-temp. refrigerator of regulation
Border humidity.So as to realize induced with laser water condensation and the sedimentation experiment under cirrus temperature and humidity conditions.The present invention can also simulate difference
Experimental situation, simple in construction, easy to adjust, safe operation, it is adaptable to the induced with laser under the conditions of observation analysis varying environment
Water condensation and sedimentation phenomenon.Its essence belongs to superpower ultrashort femtosecond laser technology, it is adaptable to the base of artificial research rainfall snowfall
Plinth is studied and Applied research fields.
Claims (4)
1. a kind of simulate the experimental provision that femtosecond laser interacts with cirrocumulus, it is characterised by that its composition includes：Femtosecond laser
Device (1), lens (2), low-temp. refrigerator (3), humiture detection device (4), aerosol generator (5), scanning electromobility particle
Thing particle diameter spectrometer (6), beam collection device (7), digital camera (17)；
There are described low-temp. refrigerator (3) four face all disks on the outside of a stainless steel cube cavity inner bag, inner bag to have condenser pipe
With super thick environment-friendly insulating material, it is compressor and heat-exchange device (9) below temperature controller (8), inner bag that inner bag top, which is, is somebody's turn to do
Inner bag is built with Height Adjustable sample collection platform (19)；
It is provided with a side of described low-temp. refrigerator (3) in low-temp. refrigerator cabinet door (18), the low-temp. refrigerator cabinet door (18)
Provided with water condensation watch window (13), laser light incident window is respectively equipped with another two relative sides of the low-temp. refrigerator (3)
Mouth (10) and laser emitting window (14), the laser beam of described femto-second laser (1) output are focused on through described lens (2)
Afterwards, entered by described laser light incident window (10) and inject described low-temp. refrigerator (3), formed in the low-temp. refrigerator (3) etc.
Plasma channel, i.e. laser chevilled silk, induction excite water condensation and sedimentation, go out finally by described laser emitting window (14)
Penetrate, and collected by beam collection device (7)；
Particle diameter detection port (16), aerosol is additionally provided with another two relative sides of described low-temp. refrigerator (3) to enter
The humiture of port (12) first detection port (11) and the second humiture detection port (15), described water condensation watch window
(13), laser light incident window (10), laser emitting window (14) are respectively mounted quartz glass seals, described the first humiture detection
Port (11), the second humiture detection port (15) have insulation plug seal；
The first humiture probe (20) of described humiture detection device (4) detects port (11) by the first described humidity
Into described low-temp. refrigerator (3), and it is fixed on described sample collecting table (19) near laser chevilled silk, described humiture
The second humiture probe (21) of detection device (4) detects through hole (15) by the second described humiture and enters described low temperature
Refrigerator (3), and it is fixed on the edge of the low-temp. refrigerator (3) inner bag；
Described aerosol generator (5) enters through hole (12) to the interior of described low-temp. refrigerator (3) by described aerosol
Courage is humidified；
Described scanning electromobility particle size spectrometer (6) detects through hole (16) to described low temperature by described particle diameter
The particle size data that the inside of refrigerator (3) produces particle is detected；
Described digital camera (17) is by described water condensation watch window (13), the water condensation situation inside observation.
2. the experimental provision that simulation femtosecond laser according to claim 1 interacts with cirrocumulus, it is characterised in that institute
Condenser pipe and high-efficiency air cooling the condenser refrigeration that the low-temp. refrigerator (3) stated is coiled by surrounding, its internal temperature is by described
Temperature controller (8) controls to reach the temperature conditionss of cirrocumulus.
3. the experimental provision that simulation femtosecond laser according to claim 1 interacts with cirrocumulus, it is characterised in that institute
The humidity for low-temp. refrigerator (3) inside stated reaches cirrocumulus interior humidity scope by aerosol generator (5) control.
4. the control method for the experimental provision that the simulation femtosecond laser described in claim 1 interacts with cirrocumulus, its feature
It is that the control method comprises the following steps：
1. femto-second laser (1) is opened, laser output parameter is adjusted, the position of the described condenser lens (2) of regulation swashs femtosecond
Core formation plasma channel, i.e. femtosecond laser chevilled silk of the light in described low-temp. refrigerator (3), laser silk and simulation
Cirrocumulus interaction, cause the water dust in chamber to undergo phase transition, induction condensation vapor and sedimentation；
2. the temperature of the temperature controller (8) on the low-temp. refrigerator (3) is set, makes the reaction temperature in low-temp. refrigerator (3) be
Cirrocumulus internal temperature；
3. the flow of regulation aerosol generator (5), makes the humidity in low-temp. refrigerator (3) for cirrocumulus interior humidity；
4. monitored using digital camera (17) by water condensation watch window (13) in the low-temp. refrigerator (3) in whole process
Portion's state；
5. the particle that produces in the low-temp. refrigerator (3) is monitored in real time using scanning electromobility particle size spectrometer (6)
Footpath distribution situation.
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| CN110411980A (en) * | 2019-09-04 | 2019-11-05 | 北京市人工影响天气办公室 | Cloud chamber moisture monitoring system |
| CN113108899A (en) * | 2021-04-08 | 2021-07-13 | 中山大学 | Ground simulation research device for interaction between near-earth space plasma and laser |
| CN114689898A (en) * | 2022-03-30 | 2022-07-01 | 中国人民解放军国防科技大学 | Device and method for observing femtosecond laser filamentation impact cloud droplets |
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