Target charging in short-pulse-laser-plasma experiments.
Phys Rev E Stat Nonlin Soft Matter Phys
; 89(1): 013102, 2014 Jan.
Article
de En
| MEDLINE
| ID: mdl-24580341
ABSTRACT
Interaction of high-intensity laser pulses with solid targets results in generation of large quantities of energetic electrons that are the origin of various effects such as intense x-ray emission, ion acceleration, and so on. Some of these electrons are escaping the target, leaving behind a significant positive electric charge and creating a strong electromagnetic pulse long after the end of the laser pulse. We propose here a detailed model of the target electric polarization induced by a short and intense laser pulse and an escaping electron bunch. A specially designed experiment provides direct measurements of the target polarization and the discharge current in the function of the laser energy, pulse duration, and target size. Large-scale numerical simulations describe the energetic electron generation and their emission from the target. The model, experiment, and numerical simulations demonstrate that the hot-electron ejection may continue long after the laser pulse ends, enhancing significantly the polarization charge.
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Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Électrons
/
Gaz plasmas
/
Lasers
/
Modèles chimiques
Langue:
En
Journal:
Phys Rev E Stat Nonlin Soft Matter Phys
Sujet du journal:
BIOFISICA
/
FISIOLOGIA
Année:
2014
Type de document:
Article
Pays d'affiliation:
France