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Open AccessJournal ArticleDOI

Single-shot characterization of independent femtosecond extreme ultraviolet free electron and infrared laser pulses

TLDR
In this article, the synchronization between individual pulses of the femtosecond extreme ultraviolet (XUV) free electron laser in Hamburg and an independent intense 120fs mode-locked Ti:sapphire laser was analyzed.
Abstract
Two-color above threshold ionization of helium and xenon has been used to analyze the synchronization between individual pulses of the femtosecond extreme ultraviolet (XUV) free electron laser in Hamburg and an independent intense 120fs mode-locked Ti:sapphire laser. Characteristic sidebands appear in the photoelectron spectra when the two pulses overlap spatially and temporally. The cross-correlation curve points to a 250fs rms jitter between the two sources at the experiment. A more precise determination of the temporal fluctuation between the XUV and infrared pulses is obtained through the analysis of the single-shot sideband intensities.

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Journal ArticleDOI

Free-Electron Lasers: New Avenues in Molecular Physics and Photochemistry

TL;DR: This review intends to provide a first overview on upcoming possibilities, emerging technologies, pioneering results, and future perspectives in this exciting field of free-electron lasers.
Journal ArticleDOI

A femtosecond X-ray/optical cross-correlator

TL;DR: In this paper, the authors exploit the peak brilliance of the free-electron laser in Hamburg and establish X-ray- pulse-induced transient changes of the optical reflectivity in GaAs as a powerful tool for Xray/optical cross-correlation.
Journal ArticleDOI

Spectral encoding of x-ray/optical relative delay

TL;DR: A nearly in situ single-shot measurement of the x-ray pulse arrival time relative to the ultra-short optical pulse is demonstrated.
Journal ArticleDOI

Non-linear processes in the interaction of atoms and molecules with intense EUV and X-ray fields from SASE free electron lasers (FELs)

TL;DR: In this paper, the authors present pump probe experiments with femtosecond time resolution using free electron laser (FEL) facilities. And they provide the ideal targets for early experiments by which not only FELs can be characterised and benchmarked but can also be the natural departure point in the hunt for non-linear behaviour of atomistic systems bathed in laser fields of ultrahigh photon energy.
References
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Journal ArticleDOI

High interannual variability of sea ice thickness in the Arctic region.

TL;DR: An eight-year time-series of Arctic ice thickness is used, derived from satellite altimeter measurements of ice freeboard, to determine the mean thickness field and its variability from 65° N to 81.5° N, which reveals a high-frequency interannual variability in mean ArcticIce thickness that is dominated by changes in the amount of summer melt, rather than byChanges in circulation.
Book

The Physics of Free Electron Lasers

TL;DR: One-dimensional theory of the FEL Amplifier was proposed in this article, starting from shot noise, and the one-dimensional theories of FEL Oscillator and Waveguide FEL were discussed.
Journal ArticleDOI

First operation of a free-electron laser generating GW power radiation at 32 nm wavelength

Valeri Ayvazyan, +127 more
TL;DR: In this paper, the first successful operation of an FEL at a wavelength of 32 nm, with ultra-short pulses (25 fs FWHM), a peak power at the Gigawatt level, and a high degree of transverse and longitudinal coherence.
Journal ArticleDOI

First observation of self-amplified spontaneous emission in a free-electron laser at 109 nm wavelength

J. Andruszkow, +144 more
TL;DR: The first observation of self-amplified spontaneous emission (SASE) in a free-electron laser (FEL) in the vacuum ultraviolet regime at 109 nm wavelength is presented.
Journal ArticleDOI

Observation of laser assisted photoelectric effect and femtosecond high order harmonic radiation.

TL;DR: First observation of laser-induced free-free transitions in the primary photoelectron spectra of gaseous helium ionized by ultrashort soft x-ray pulses and the first direct measurements on the temporal duration of femtosecond high order harmonic radiation are reported.
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