The interaction of an ultraintense, 30-fs laser pulse with a preformed plasma was investigated as a method of producing a beam of high-energy electrons. We used thin foil targets that are exploded by the laser amplified spontaneous emission preceding the main pulse. Optical diagnostics show that the main pulse interacts with a plasma whose density is well below the critical density. By varying the foil thickness, we were able to obtain a substantial emission of electrons in a narrow cone along the laser direction with a typical energy well above the laser ponderomotive potential. These results are explained in terms of wake-field acceleration.
|Autori:||Giulietti D; Galimberti M; Giulietti A; Gizzi LA; Borghesi M; Balcou P; Rousse A; Rousseau JP|
|Titolo:||High-energy electron beam production by femtosecond laser interactions with exploding-foil plasmas RID D-2712-2009|
|Anno del prodotto:||2001|
|Appare nelle tipologie:||1.1 Articolo in rivista|