IPS Progress: Phys. Rev. Lett. 104, 215004 (2010)
Posted on June 10, 2010

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 2.21011 photons/J into 4. 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.

URL: http://link.aps.org/doi/10.1103/PhysRevLett.104.215004
DOI: 10.1103/PhysRevLett.104.215004
PACS: 52.38.Ph, 36.40.Gk, 52.50.Jm, 52.70.La

ICP NO.05243 || CopyRight © 2010 IPS, SJTU || Address: 800 Dongchuan Rd. Shanghai 200240, P.R.China || E-mail: ips@sjtu.edu.cn