C. Bömer
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View article: A sensitive high repetition rate arrival time monitor for X-ray free electron lasers
A sensitive high repetition rate arrival time monitor for X-ray free electron lasers Open
View article: A sensitive high repetition rate arrival time monitor for X-ray Free Electron Lasers
A sensitive high repetition rate arrival time monitor for X-ray Free Electron Lasers Open
We demonstrate a new scheme to measure the relative arrival time between femtosecond pulses of hard X-radiation from a free electron laser and femtosecond optical pulses from an amplified laser system at the Femtosecond X-ray Experiments I…
View article: Ultrafast X-ray Photochemistry at European XFEL: Capabilities of the Femtosecond X-ray Experiments (FXE) Instrument
Ultrafast X-ray Photochemistry at European XFEL: Capabilities of the Femtosecond X-ray Experiments (FXE) Instrument Open
Time-resolved X-ray methods are widely used for monitoring transient intermediates over the course of photochemical reactions. Ultrafast X-ray absorption and emission spectroscopies as well as elastic X-ray scattering deliver detailed elec…
View article: Scientific instrument Femtosecond X-ray Experiments (FXE): instrumentation and baseline experimental capabilities
Scientific instrument Femtosecond X-ray Experiments (FXE): instrumentation and baseline experimental capabilities Open
The European X-ray Free-Electron Laser (EuXFEL) delivers extremely intense (>10 12 photons pulse −1 and up to 27000 pulses s −1 ), ultrashort (<100 fs) and transversely coherent X-ray radiation, at a repetition rate of up to 4.5 MHz. Its u…
View article: A transportable Paul-trap for levitation and accurate positioning of micron-scale particles in vacuum for laser-plasma experiments
A transportable Paul-trap for levitation and accurate positioning of micron-scale particles in vacuum for laser-plasma experiments Open
We report on a Paul-trap system with large access angles that allows positioning of fully isolated micrometer-scale particles with micrometer precision as targets in high-intensity laser-plasma interactions. This paper summarizes theoretic…
View article: Parametric Down-Conversion of X Rays into the Optical Regime
Parametric Down-Conversion of X Rays into the Optical Regime Open
We report the observation of parametrically down-converted x-ray signal photons at photon energies that correspond to idler photons at optical wavelengths. The count-rate dependence on the angles of the input beam and of the detector and o…
View article: Proton acceleration by irradiation of isolated spheres with an intense laser pulse
Proton acceleration by irradiation of isolated spheres with an intense laser pulse Open
We report on experiments irradiating isolated plastic spheres with a peak laser intensity of 2-3×10^{20}Wcm^{-2}. With a laser focal spot size of 10 μm full width half maximum (FWHM) the sphere diameter was varied between 520 nm and 19.3 μ…