FILATMO
Laser Filamentation for Probing and Controlling Atmospheric Processes
| Coordinatore | UNIVERSITE DE GENEVE
Spiacenti, non ci sono informazioni su questo coordinatore. Contattare Fabio per maggiori infomrazioni, grazie. |
| Nazionalità Coordinatore | Switzerland [CH] |
| Totale costo | 2˙403˙424 € |
| EC contributo | 2˙403˙424 € |
| Programma | FP7-IDEAS-ERC
Specific programme: "Ideas" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) |
| Code Call | ERC-2011-ADG_20110209 |
| Funding Scheme | ERC-AG |
| Anno di inizio | 2012 |
| Periodo (anno-mese-giorno) | 2012-07-01 - 2017-06-30 |
Partecipanti
| # | ||||
|---|---|---|---|---|
| 1 |
UNIVERSITE DE GENEVE
Organization address
address: Rue du General Dufour 24 contact info |
CH (GENEVE) | hostInstitution | 2˙403˙425.00 |
| 2 |
UNIVERSITE DE GENEVE
Organization address
address: Rue du General Dufour 24 contact info |
CH (GENEVE) | hostInstitution | 2˙403˙425.00 |
Mappa
Word cloud
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Obiettivo del progetto (Objective)
'The prevention of damaging weather phenomena like floods, hail and lightning strikes has been a dream for centuries. We propose a highly innovative approach relying on laser filaments for both triggering and guiding lightning and produce water condensation in the atmosphere. Filaments are self-sustained light strings of typ. 100 um diameter and hundreds of meters length in air, bear very high intensities and are electrically conductive through molecular ionization.
The filamentation process in air was considered until recently as resulting from the dynamic balance between the optical Kerr effect and defocusing by the self-generated plasma. Our unexpected discovery, last year, that filaments are governed by negative higher-order Kerr effect (HOKE), opened both basic physical questions about the stabilization mechanism and new opportunities to optimize the envisioned applications to lightning triggering and cloud condensation.
We propose first to study in the laboratory the physical origin of the alternated signs of HOKE in gases, which are suspected to stem from populated bound states. Coherently controlling these bound states in rare gases and air will allow us to tailor the HOKE inversion, and consequently to control the filament process itself. Optimal pulse shapes will then be sought by adaptive (closed loop) techniques to maximize the plasma density and lifetime in filaments for lightning control applications. Similar coherent control approaches will be performed for optimizing the complex photochemistry that leads to water vapor condensation in the atmosphere.
We will then apply the optimal pulse shapes to real scale field experiments. To this end we intend to use the mobile TW laser from the Teramobile consortium, which we are part of, in order to perform two extensive campaigns for real-scale lightning control (in Lugano) and haze/cloud generation (in Geneva). These experiments will constitute the first coherent manipulation of atmospheric process.'