Temporal probing of a number of fundamental dynamical processes requires intense pulses
at femtosecond or even attosecond (1 as= 10-18 s) timescales. A frequency 'comb'of …

We report on the observation of doubly charged helium ions produced by a nonlinear
interaction between a helium atom and photons with a photon energy of 42 eV which are …

We demonstrate and evaluate the importance of an intrinsic chirp inherent to attosecond
pulse creation accompanying high-order harmonic generation in recently published …

We demonstrate a tool for quantitative measurements in the extreme ultraviolet (EUV)
spectral region measuring spatially resolved atomic ionization products at the focus of an …

After introducing the importance of non-linear processes in the extreme-ultra-violet (XUV)
spectral regime to the attosecond (asec) pulse metrology and time domain applications, we …

Temporal widths of an attosecond (asec) XUV radiation pulse train, formed by the
superposition of higher order harmonics, have been recently determined utilizing a 2nd …

The unequivocal demonstration of attosecond XUV pulse train generation based on the
synthesis of a comb of harmonics of an infrared femtosecond laser pulse is inevitably linked …

We have used polished stainless steel as a mirror substrate to provide focusing of soft x rays
in grazing-incidence reflection. The critical issue of the quality of the steel surface, polished …

Signatures of strong-field effects induced by an intense attosecond pulse train, synthesized
by the superposition of a Ti: sapphire laser high-order harmonics are observed in atomic two …

A novel single-shot second-order autocorrelation scheme for extreme-ultraviolet radiation
(XUV) is proposed. It is based on an ion-imaging technique, which provides spatial …