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Exawatt
Définitions de « exawatt »
Exawatt - Nom commun
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(Métrologie, Électricité, Physique) Unité de mesure de la puissance dans le Système international d'unités (SI), équivalente à 10^18 watts, représentée par le symbole EW.
Le LOA affiche cependant depuis peu un projet extrêmement ambitieux défendu auprès de l’ESFRI, dit ELI pour Extreme Light Infrastructure, de passage au niveau de la fraction d’exawatt en régime d’impulsions très courtes (jusqu’à 2 kJ en 15 fs à une longueur d’onde de 2 µm).
— Guy Laval, La Fusion nucléaire : de la recherche fondamentale à la production d’énergie ?
Étymologie de « exawatt »
Dérivé de watt, avec le préfixe exa-.Citations contenant le mot « exawatt »
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More information: Min Sup Hur et al, Laser pulse compression by a density gradient plasma for exawatt to zettawatt lasers, Nature Photonics (2023). DOI: 10.1038/s41566-023-01321-x
Laser pulse compression by a density gradient plasma for exawatt to zettawatt lasers -
Modelling shows how plasma density gradients can be tailored to compress optical pulses in the final stages of laser systems towards exawatt (1018 W) peak powers.
Nature — Plasma optics promise exawatt performance | Nature Photonics -
Ditmire plans to build an exawatt laser with a power equivalent to 1000 petawatts. But such a super-laser is still years away from actual development. In the meantime, Ditmire already has the most powerful laser in the world.
Inside Science — Going For Exawatts | Inside Science -
Todd Ditmire, director of the High Intensity Laser Science Group at the University of Texas at Austin, reported at this week’s meeting that a new type of glass should be able to handle the intense pulses of light needed to create an exawatt laser. The glass would be doped and used to create devices called amplifiers–when light from a laser shines on the glass amplifier, ions in the glass absorb the light and re-emit it at higher energy. “The glass is just a host–it’s a transparent material that holds the ions,” says Ditmire.
MIT Technology Review — Building the World’s Most Powerful Laser | MIT Technology Review -
Ditmire says his near-petawatt laser outruns NIF’s laser, and he even has plans for making it more powerful by using some special laser glass which can amplify the power to 100 kJ, about 500 times more. Building an exawatt laser would take up to 10 years to achieve, with proper governmental and private funding, he says.
The Green Optimistic — Todd Ditmire's Petawatt Laser: One Step Closer to Nuclear Fusion - The Green Optimistic