Emission of a hot electron jet from intense femtosecond-laser–cluster interactions

Abstract

A directional hot electron jet with energy higher than 100 keV was generated along the laser propagation direction from Ar clusters irradiated with a laser pulse of duration 28 fs and intensity 1 x 10(17) W/cm(2). The hot electron jet was detected only with linearly polarized laser pulses, not with circularly polarized pulses. Channel betatron resonance is believed to be the main accelerating mechanism for this directional hot electron jet.

Bright betatron X-ray radiation from a laser-driven-clustering gas target

“…However, as described in Ref. [19], when using a clustering gas target even in modest laser intensity, the strong resonant heating of cluster electrons7 in the early stage of interaction results in higher local electron density and much larger pre-acceleration phase in the transverse direction than the case of a non-clustering gas, which makes it easy to shorten the time period before strong v x B starts. As shown in Fig.…”

Electron emission from a double-layer metal under femtosecond laser irradiation

“…Studies of the interaction between a femtosecond laser and metal become more important to many applications, and among these studies, that of the electron emission relaxation dynamics attracts intense interest [3][4][5][6][7]. The femtosecond laser pulse induced photoelectron emission and thermoelectron emission are widely used in basic researches and practical applications [8][9][10]. The ultrafast electron pulse generated by a femtosecond laser pulse can be used to diagnose the plasma [11][12][13], and confirm the lifetime of excited electrons [14][15][16], etc.…”

Bright source of Kα and continuum X rays by heating Kr clusters using a femtosecond laser

“…laser. Monitoring high-energy electrons~Shao et al, 1996Chen et al, 2002!, ions~Dobosz et al, 1999Nishihara et al, 2001!, neutrons~Zweiback et al, 2000Schwoerer et al, 2001!, andX rays~Ter-Avetisyan et al, 2001;Skobelev et al, 2002! Laser-produced plasmas from optically ionized gases, clusters, and solids have been widely explored as sources of X-ray and extreme UV over the last decade~McPherson et al, 1993;Ditmire et al, 1996;Giulietti & Gizzi, 1998;Rocca, 1999;Hulin et al, 2000;Junkel-Vives et al, 2001;Krainov & Smirnov, 2002!.…”