Abstract
Bright Ar quasimonochromatic K-shell x ray with very little background has been generated using an Ar clustering gas jet target irradiated with a 30 fs ultrahigh-contrast laser, with a measured flux of 2.2×1011 photons/J into 4π. This intense x-ray source critically depends on the laser contrast and intensity. The optimization of source output with interaction length is addressed. Simulations point to a nonlinear resonant mechanism of electron heating during the early stage of laser interaction, resulting in enhanced x-ray emission. The x-ray pulse duration is expected to be only 10 fs, opening the possibility for single-shot ultrafast keV x-ray imaging applications.
Original language | English |
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Article number | 215004 |
Number of pages | 4 |
Journal | Physical Review Letters |
Volume | 104 |
DOIs | |
Publication status | Published - 28 May 2010 |
Keywords
- intense
- high-contrast
- femtosecond K-shell X-ray source
- laser-driven ar clusters