Laser-assisted water condensation in the atmosphere: a step towards modulating precipitation?

Kasparian, Jérôme; Rohwetter, Philipp; Wöste, L.; Wolf, Jean‐Pierre

doi:10.1088/0022-3727/45/29/293001

Cited by 20 publications

(11 citation statements)

References 110 publications

(140 reference statements)

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“…There will be attenuation of energy in this propagation. Kasparian et al [10] experimented with terawatt laser from the ground and observed tiny raindrops in an altitude of 45 to 75m of the atmosphere. To create large water droplets at higher altitudes, the group feels that laser power has to be peta-watt (10 15 watt) or hexa-watt (10 18 watt).…”

Section: Theory and Methodologymentioning

confidence: 99%

Innovative Rainmaking Technology by Laser System Initiation Endothermic Reactions in a Way of Natural Lightning Phenomena in the Atmosphere

Chopkar¹,

Chakrabarty²

2021

IJEEE

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In the atmosphere, after lightning, precipitation is formed and heavy rainfall occurs. This is a well-known process. This natural lighting phenomenon has been practically demonstrated in the laboratory cloud chamber, A laser beam has to be shot into the cloud region of the atmosphere to create high temperature. This high temperature will break the bonds of atmospheric N 2 and O 2 and produce N and O which will be in excited state (N*, O*). These excited N* and O* are very unstable. They immediately fall to the ground state through endothermic reactions. These endothermic reactions absorb heat from the cloud region. As a result, temperature of the cloud region falls, condensation takes place, form rain drops, act as natural seeds are created and it rains. Its use as rain drain by Laser system from ground for Green environment. "Laser photons photo-dissociate atmospheric compounds N 2 and O 2 and form ozone (O 3 ) and nitrogen molecules (NO). Increase of O 3 and NO concentration after lightning has also been experimentally observed. That this lightning phenomenon created through artificial lightning by laser system can produce rain in the atmosphere has been practically proved as "Laser-induced water condensation in air". Scientists have succeeded in obtaining raindrops from an altitude of 45 to 75m of the atmosphere by terawatt mobile laser. IRRA Scientist Group propose laser system of specification: 10 12 watt, 800nm, 500mJ, 120fs and 10Hz for this research project. The results could be of immense benefit to human being.

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Section: Theory and Methodologymentioning

confidence: 99%

Innovative Rainmaking Technology by Laser System Initiation Endothermic Reactions in a Way of Natural Lightning Phenomena in the Atmosphere

Chopkar¹,

Chakrabarty²

2021

IJEEE

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“…Furthermore, we propose to use this signal to extract physical or chemical parameters (T, RH, pre--existing nanoparticles, volatile organic compound (VOC) concentration…) that influence laser--induced condensation [10,11].…”

Section: Introductionmentioning

confidence: 99%

Pump-probe differential Lidar to quantify atmospheric supersaturation and particle-forming trace gases

2014

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We propose a pump--probe differential Lidar technique to remotely map the ability of the atmosphere to undergo particle condensation, that depends on the concentration of both pre--existing nanoparticles and condensable species or their precursors. Besides its interest for improving short--time, local weather forecast, this technique could provide information on atmospheric parameters like the concentration of condensable species, and physical parameters including the temperature and relative humidity.

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“…In order to better characterize propagation at the sub-PW level, direct horizontal measurements over several hundred meters are required. The photon bath of high energy and high power laser beam can play an important role in practical applications such as laser promoted particle formation [42][43][44], and therefore, it deserves further investigation. It also has to be taken into account in analyzing Lidar signals based on the supercontinuum.…”

Section: Introductionmentioning

confidence: 99%

White-light femtosecond Lidar at 100 TW power level

et al. 2013

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We characterized the white-light supercontinuum emission by a sub-petawatt laser system in the atmosphere via light detection and ranging measurements. As much as 1 J of supercontinuum is generated in the atmosphere, corresponding to a conversion efficiency of 30 %. This generation occurs at altitudes below 100 m. The high initial beam intensity results in the saturation of the number of self-guided filaments. Therefore, the “photon bath” surrounding the filaments strongly contributes to the white-light generation. These finding is well reproduced by numerical simulations based on the experimental parameters

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Laser-assisted water condensation in the atmosphere: a step towards modulating precipitation?

Cited by 20 publications

References 110 publications

Innovative Rainmaking Technology by Laser System Initiation Endothermic Reactions in a Way of Natural Lightning Phenomena in the Atmosphere

Innovative Rainmaking Technology by Laser System Initiation Endothermic Reactions in a Way of Natural Lightning Phenomena in the Atmosphere

Pump-probe differential Lidar to quantify atmospheric supersaturation and particle-forming trace gases

White-light femtosecond Lidar at 100 TW power level

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