Open AccessSingle-shot measurement of laser-induced double step ionization of helium
Author(s) -
Ki-Yong Kim,
I. Alexeev,
H. M. Milchberg
Publication year - 2002
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.10.001563
Subject(s) - optics , supercontinuum , helium , laser , interferometry , femtosecond , materials science , ionization , double ionization , jet (fluid) , atomic physics , water window , temporal resolution , physics , ion , wavelength , quantum mechanics , photonic crystal fiber , thermodynamics
The spatio-temporal evolution of the free electron density induced in a helium gas jet by an intense femtosecond pulse is measured with ~10 fs resolution in a ~1 ps temporal window. The double-stepionization feature is observed. In these measurements, we use the technique of single-shot supercontinuum spectral interferometry. It is demonstrated that finite laser-gas interaction lengths can strongly affect the interpretation of such measurements.