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FUSION LASER [15 records]

Record 1 2024-01-27

English

Subject field(s)
  • Lasers and Masers
  • Energy (Physics)
DEF

the result : an explosion vastly smaller than, but otherwise not unlike, that of a hydrogen bomb, which releases energy in much the same way as energy is produced at the core of the sun and other stars. This is laser fusion.

French

Domaine(s)
  • Masers et lasers
  • Énergie (Physique)

Spanish

Save record 1

Record 2 2024-01-27

English

Subject field(s)
  • Lasers and Masers
DEF

The world’s most powerful laser at the Lawrence Livermore National Laboratory.

DEF

Laser which will be used to study and develop the physics and technology of inertial-confinement fusion for weapons-physics research and as a candidate for future power-generation technology.

French

Domaine(s)
  • Masers et lasers

Spanish

Save record 2

Record 3 2023-10-17

English

Subject field(s)
  • Printing Processes - Various
  • Applications of Electronics
DEF

A powder bed fusion additive manufacturing process in which the powder is sintered by a thermal print head instead of a laser.

CONT

In selective heat sintering (SHS), the material is fed from the powder deposition tanks ... heated to just below its melting point, spread out into a thin layer over the movable building platform ... and flattened using a roller ...

French

Domaine(s)
  • Procédés d'impression divers
  • Applications de l'électronique
DEF

Procédé de fabrication additive par fusion sur lit de poudre selon lequel la poudre est frittée par une tête d'impression thermique en lieu d'un laser.

Spanish

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Record 4 2023-10-17

English

Subject field(s)
  • Printing Processes - Various
  • Applications of Electronics
CONT

Laser powder bed fusion(LPBF) is an additive manufacturing process that uses a laser beam to fuse powder particles in a layer-by-layer fashion, which allows production of complex three-dimensional(3D) structures. LPBF includes selective laser melting(SLM), where powder is fully melted, and selective laser sintering(SLS) for other cases such as solid state sintering, liquid state sintering, and partial melting...

French

Domaine(s)
  • Procédés d'impression divers
  • Applications de l'électronique

Spanish

Save record 4

Record 5 2021-10-29

English

Subject field(s)
  • Photoelectricity and Electron Optics
  • Lasers and Masers
  • Thermonuclear fusion
  • Plasma Physics
CONT

In the context of inertial confinement fusion, optical smoothing is a technique used to provide laser irradiation as homogeneous as possible. It is required for limiting the development of laser-plasma instabilities...

French

Domaine(s)
  • Photo-électricité et optique électronique
  • Masers et lasers
  • Fusion thermonucléaire
  • Physique des plasmas
DEF

Technique optique qui modifie les caractéristiques des faisceaux laser pour rendre l'irradiation de la cible de fusion inertielle le plus homogène possible.

OBS

lissage optique : désignation et définition publiées au Journal officiel de la République française le 5 septembre 2021.

Spanish

Save record 5

Record 6 2019-11-15

English

Subject field(s)
  • Lasers and Masers
CONT

Nd : glass lasers are usually frequency tripled to the third harmonic at 351 nm in laser fusion devices.

French

Domaine(s)
  • Masers et lasers
CONT

L'interaction non linéaire du rayonnement du laser à verre au néodyme avec un cristal de phosphate dihydrogéné de potassium (KDP) se révéla très efficace [...]

Spanish

Save record 6

Record 7 2018-01-05

English

Subject field(s)
  • Thermonuclear fusion
  • Plasma Physics
DEF

[The thermonuclear] fusion in which a fuel capsule is imploded very quickly, so that the inertia of the converging fuel ions allows fusion to occur before the particles can disperse.

CONT

Inertial confinement fusion triggers fusion reactions by igniting a pellet containing fusion fuel using intense laser or ion beams as drivers.

French

Domaine(s)
  • Fusion thermonucléaire
  • Physique des plasmas
DEF

Fusion thermonucléaire produite par l'implosion d'un microballon de fusion inertielle sous l'effet de faisceaux laser ou d'un rayonnement X.

OBS

La fusion est dite ici «inertielle» parce qu'elle ne se produit que pendant le temps très court, résultant de l'inertie des combustibles, qui précède leur dispersion.

OBS

fusion par confinement inertiel; fusion inertielle : termes et définition publiés au Journal officiel de la République française le 30 septembre 2017.

Spanish

Save record 7

Record 8 2015-04-22

English

Subject field(s)
  • Industrial Techniques and Processes
CONT

Laser Metal Deposition(LMD) is a process which uses a laser beam to form a melt pool on a metallic substrate, into which powder is fed. The powder melts to form a deposit that is fusion bonded to the substrate. The required geometry is built up layer by layer. Both the laser and nozzle from which the powder is delivered are manipulated using a gantry system or robotic arm.

French

Domaine(s)
  • Techniques industrielles
CONT

Dépôt de métal par laser. Le laser assure le frittage ou la fusion. Une buse pulvérise la poudre métallique.

Spanish

Save record 8

Record 9 2010-03-01

English

Subject field(s)
  • Atomic Physics
  • Nuclear Fission Reactors
CONT

Improved uniformity of the laser for-al spot profile is a necessary criterion for the success of high intensity laser fusion and to improve the quality of data from moderate intensity laser driven shock experiments in solids. Recently developed laser smoothing techniques rely on both temporal smoothing and thermal smoothing to produce uniform ablation pressures on the target surface. Thermal smoothing is not effective during the low intensity portion of a laser pulse and the resultant shock structure mirrors the residual laser nonuniformities. The impact of the first(nonuniform) shock can be diminished by using foam layers, a precursor flash, shallow angles of incidence, and by adiabatically compressing the target with a temporally long, slowly rising laser pulse.

French

Domaine(s)
  • Physique atomique
  • Réacteurs nucléaires de fission
CONT

[...] il faut au départ et au cours de l'impulsion réaliser une interface aussi régulière que possible. Les irrégularités restantes ne pourront être qu'amplifiées au cours du temps (d'autres effets comme le lissage thermique viennent un peu atténuer le propos).

Spanish

Save record 9

Record 10 2009-10-26

English

Subject field(s)
  • Atomic Physics
CONT

Target fabrication and injection activities toward a laser fusion reactor with wet wall.

French

Domaine(s)
  • Physique atomique
CONT

La protection de la chambre [de réaction] peut être conçue suivant le schéma du mur sec, du mur mouillé ou du mur liquide [...] Le mur mouillé. La première paroi est un tissu poreux à travers lequel suinte en permanence un liquide (plomb, sel fondu, etc.); l'évaporation (plusieurs dizaines de kilogrammes) est acceptée. Ce schéma se prête à l'emploi de tous les types de cibles et de faisceaux d'énergie; il pose néanmoins le problème de la restauration, entre deux impulsions, de la qualité de l'atmosphère de la chambre. On doit débarrasser la chambre du surcroît de pression et des brouillards induits par la précédente implosion. Cela étant, la protection est, par nature, refaite en permanence.

Spanish

Save record 10

Record 11 1999-06-16

English

Subject field(s)
  • Bioengineering
CONT

The availability of additional laser methods such as optical trapping(immobilizing and moving cells or organelles with a focused beam of light), optiporation(permeabilization of the cell membrane with light), optical fusion(inducting cells or vesicles for fuse with light), and optical ablation(optically incinerating cells or subcellular structures) provides an ever-increasing armory of optical tools for new and exciting investigations that depend upon macromanipulation of single cells and contaminant-free isolation of these cells from tissue slices or tissue culture.

French

Domaine(s)
  • Technique biologique
OBS

Perméabilisation de la membrane cellulaire à l'aide du rayon laser.

Spanish

Save record 11

Record 12 1999-06-16

English

Subject field(s)
  • Bioengineering
  • Cytology
CONT

The availability of additional laser methods such as optical trapping(immobilizing and moving cells or organelles with a focused beam of light), optiporation(permeabilization of the cell membrane with light), optical fusion(inducting cells or vesicles for fuse with light), and optical ablation(optically incinerating cells or subcellular structures) provides an ever-increasing armory of optical tools for new and exciting investigations that depend upon macromanipulation of single cells and contaminant-free isolation of these cells from tissue slices or tissue culture.

French

Domaine(s)
  • Technique biologique
  • Cytologie
OBS

Ablation cellulaire par rayon laser.

Spanish

Save record 12

Record 13 1999-06-16

English

Subject field(s)
  • Bioengineering
  • Cytology
CONT

The availability of additional laser methods such as optical trapping(immobilizing and moving cells or organelles with a focused beam of light), optiporation(permeabilization of the cell membrane with light), optical fusion(inducting cells or vesicles for fuse with light), and optical ablation(optically incinerating cells or subcellular structures) provides an ever-increasing armory of optical tools for new and exciting investigations that depend upon macromanipulation of single cells and contaminant-free isolation of these cells from tissue slices or tissue culture.

French

Domaine(s)
  • Technique biologique
  • Cytologie

Spanish

Save record 13

Record 14 1999-06-16

English

Subject field(s)
  • Biochemistry
  • Bioengineering
CONT

The availability of additional laser methods such as optical trapping(immobilizing and moving cells or organelles with a focused beam of light), optiporation(permeabilization of the cell membrane with light), optical fusion(inducting cells or vesicles for fuse with light), and optical ablation(optically incinerating cells or subcellular structures) provides an ever-increasing armory of optical tools for new and exciting investigations that depend upon macromanipulation of single cells and contaminant-free isolation of these cells from tissue slices or tissue culture.

French

Domaine(s)
  • Biochimie
  • Technique biologique
CONT

Il est souvent délicat de contrôler avec précision la position de l'objet étudié en raison de sa taille et de sa fragilité. Cela devient plus délicat encore lorsqu'il s'agit d'approcher deux objets initialement séparés afin de les amener au contact. Pour réaliser de telles expériences, nous développons des outils spécifiques de manipulation : le piégeage optique par faisceaux laser et la micromanipulation mécanique. Le piégeage optique utilise la pression de radiation exercée par un ou deux faisceaux laser focalisés. On peut ainsi manipuler sans contact des objets de quelques microns. Nous utilisons cette technique pour mettre en contact une particule solide avec une vésicule géante.

Spanish

Save record 14

Record 15 1990-04-23

English

Subject field(s)
  • Lasers and Masers
CONT

the perfect fusion laser. A hot controversy currently rages over what kind of laser is best for fusion.

French

Domaine(s)
  • Masers et lasers

Spanish

Save record 15

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