A grazing incidence x-ray streak camera for ultrafast, single-shot measurements

Feng, Jun; Engelhorn, K.; Cho, B. I.; Lee, H. J.; Greaves, Mervyn; Weber, Carsten; Falcone, R. W.; Padmore, H. A.; Heimann, P. A.

doi:10.1063/1.3371810

Cited by 28 publications

(9 citation statements)

References 17 publications

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“…A pair of slits reduces the x-ray spot size to either 150 x 150 μm 2 or 150 x 250 μm 2 , in order that an area of relatively uniform fluence is sampled within the laser spot. The Xrays transmitted through the sample are dispersed by a variable line spaced grating spectrometer [21] and focused horizontally onto an x-ray streak camera [22]. The XANES spectra have an energy resolution of 0.6 eV determined mainly by the dispersion of the spectrometer and the spatial resolution of the streak camera.…”

Section: X-ray Absorption Near-edge Spectroscopy (Xanes) Probes the Umentioning

confidence: 99%

Electronic structure of warm dense silicon dioxide

et al. 2015

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The electronic structure of warm dense silicon dioxide has been investigated by X-ray absorption near edge spectroscopy. An ultrafast optical laser pulse was used to isochorically heat a thin silicon dioxide sample, and measured spectra were compared with simulations generated by molecular dynamics and density functional theory. In comparison with the room temperature spectrum, two novel features were observed: a peak below the band gap and absorption within the band gap. This behavior was also observed in the simulations. From consideration of the calculated spectra, the peak below the gap is attributed to valence electrons that have been promoted to the conduction band, while absorption within the gap is attributed to broken Si-O bonds.

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Section: X-ray Absorption Near-edge Spectroscopy (Xanes) Probes the Umentioning

confidence: 99%

Electronic structure of warm dense silicon dioxide

et al. 2015

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“…All these works used an ultra-fast x-ray streak camera to achieve picosecond temporal resolution. 6,7 The first demonstration of a picosecond XUV laser was reported for a Ni-like Ag laser 8,9 at 13.9 nm. A systematic study of the role of the duration of the pump laser was then carried out by Dunn 10 for a Ni-like Pd laser at 14.7 nm.…”

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Temporal characterization of a picosecond extreme ultraviolet laser pumped in grazing incidence

Meng

Bourgaux

Bastiani-Ceccotti

et al. 2012

Applied Physics Letters

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We report an experimental study of the temporal duration of a transient pumping extreme ultraviolet (XUV) laser emitted at 18.9 nm, using an ultrafast x-ray streak camera. We have investigated the shot-to-shot reproducibility of the pulse duration, as well as its behaviour as a function of several pumping parameters. Our results show that the pulse duration increases slowly with the pump pulse duration, in agreement with previous observations performed in a different geometry. The angle of the pump laser relative to the target surface also affects the XUV laser duration in a measurable way.

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“…Dispersed x-rays enter the streak camera, which has a temporal resolution of 2 ps. This streak camera detector provides 2dimensional images of the x-ray pulse with time on one axis and photon energy on the other [12].…”

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Electronic Structure of Warm Dense Copper Studied by Ultrafast X-Ray Absorption Spectroscopy

et al. 2011

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We use time-resolved x-ray absorption spectroscopy to investigate the unoccupied electronic density of states of warm dense copper that is produced isochorically through the absorption of an ultrafast optical pulse. The temperature of the superheated electron-hole plasma, which ranges from 4000 to 10 000 K, was determined by comparing the measured x-ray absorption spectrum with a simulation. The electronic structure of warm dense copper is adequately described with the high temperature electronic density of state calculated by the density functional theory. The dynamics of the electron temperature is consistent with a two-temperature model, while a temperature-dependent electron-phonon coupling parameter is necessary.

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A grazing incidence x-ray streak camera for ultrafast, single-shot measurements

Cited by 28 publications

References 17 publications

Electronic structure of warm dense silicon dioxide

Electronic structure of warm dense silicon dioxide

Temporal characterization of a picosecond extreme ultraviolet laser pumped in grazing incidence

Electronic Structure of Warm Dense Copper Studied by Ultrafast X-Ray Absorption Spectroscopy

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